IBM DS4800 Installation, User And Maintenance Manual

IBM System Storage DS4800 Storage Subsyste m



Installation, User’ s, and Maintenance Guid e

GC26-7845-01

IBM System Storage DS4800 Storage Subsyste m



Installation, User’ s, and Maintenance Guid e

GC26-7845-01

Note:

Before using this information and the product it supports, be sure to read the general information in “Notices” on page 197.

Second Edition (March 2007)

© Copyright International Business Machines Corporation 2006, 2007. All rights reserved.

US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Safety

The caution and danger statements that this document contains can be referenced
in the multilingual IBM® Safety Information document that is provided with your IBM
System Storage DS4800 Storage Subsystem. Each caution and danger statement
is numbered for easy reference to the corresponding statements in the translated
document.

v Danger: These statements indicate situations that can be potentially lethal or

extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure, step, or
situation.

v Caution: These statements indicate situations that can be potentially hazardous

to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.

v Attention: These notices indicate possible damage to programs, devices, or

data. An attention notice is placed just before the instruction or situation in which
damage could occur.

DANGER

Handling

the cord on this product or cords associated with accessories

sold with product will expose you to lead, a chemical known to the State of
California to cause cancer, birth defects, or other reproductive harm. Wash
hands after handling.

Before installing this product, read the following danger and caution notices.

© Copyright IBM Corp. 2006, 2007 iii

Statement 1:

DANGER

Electrical

current from power, telephone, and communication cables is

hazardous.

To avoid a shock hazard:
v Do not connect or disconnect any cables or perform installation,

maintenance, or reconfiguration of this product during an electrical
storm.

v Connect all power cords to a properly wired and grounded electrical

outlet.

v Connect to properly wired outlets any equipment that will be attached to

this product.

v When possible, use one hand only to connect or disconnect signal

cables.

v Never turn on any equipment when there is evidence of fire, water, or

structural damage.

v Disconnect the attached power cords, telecommunications systems,

networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration procedures.

v Connect and disconnect cables as described in the following table when

installing, moving, or opening covers on this product or attached
devices.

To Connect: To Disconnect:

1. Turn everything OFF.

2. First, attach all cables to devices.

3. Attach signal cables to connectors.

4. Attach power cords to outlet.

1. Turn everything OFF.

2. First, remove power cords from outlet.

3. Remove signal cables from connectors.

4. Remove all cables from devices.

5. Turn device ON.

iv IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Statement 2:

CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has a module containing a
lithium battery, replace it only with the same module type made by the same
manufacturer. The battery contains lithium and can explode if not properly
used, handled, or disposed of.

Do not:

v Throw or immerse into water
v Heat to more than 100° C (212° F)
v Repair or disassemble

Dispose

of the battery as required by local ordinances or regulations.

Safety v

Statement 3:

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:

v Do not remove the covers. Removing the covers of the laser product could

result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.

v Use of controls or adjustments or performance of procedures other than

those specified herein might result in hazardous radiation exposure.

DANGER

laser products contain an embedded Class 3A or Class 3B laser

Some
diode. Note the following.

Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.

Class 1 Laser statement

IEC 825-11993 CENELEC EN 60 825

vi IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Statement 4:

≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)

CAUTION:
Use safe practices when lifting.

Statement 5:

CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.

2

1

Safety vii

Statement 6:

CAUTION:
Never remove the cover on a power supply or any part that has the following
label attached.

Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.

Statement 7:

DANGER

Handling

the cord on this product, or cords associated with accessories

sold with this product, will expose you to lead, a chemical known to the
State of California to cause cancer and birth defects or other reproductive
harm. Wash hands after handling.

viii IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Contents

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv

About this document . . . . . . . . . . . . . . . . . . . . . xvii

FAStT product renaming . . . . . . . . . . . . . . . . . . . . . xvii

Who should read this document . . . . . . . . . . . . . . . . . . xvii

How this document is organized . . . . . . . . . . . . . . . . . . xviii

DS4000 Storage Subsystem installation tasks - General overview . . . . . . xviii

Getting information, help, and service . . . . . . . . . . . . . . . . xxii

Before you call . . . . . . . . . . . . . . . . . . . . . . . . xxii

Using the documentation . . . . . . . . . . . . . . . . . . . . xxiii

Web sites . . . . . . . . . . . . . . . . . . . . . . . . . xxiii

Software service and support . . . . . . . . . . . . . . . . . . xxv

Hardware service and support . . . . . . . . . . . . . . . . . . xxv

Fire suppression systems . . . . . . . . . . . . . . . . . . . xxv

How to send your comments . . . . . . . . . . . . . . . . . . xxv

Notices and statements used in this document . . . . . . . . . . . . . xxvi

Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . .1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Fibre channel defined . . . . . . . . . . . . . . . . . . . . . .2

SATA defined . . . . . . . . . . . . . . . . . . . . . . . . .2

Features at a glance . . . . . . . . . . . . . . . . . . . . . .2

Clustering support . . . . . . . . . . . . . . . . . . . . . . .3

Inventory checklist . . . . . . . . . . . . . . . . . . . . . . . .3

Product updates . . . . . . . . . . . . . . . . . . . . . . . . .5

Best practices guidelines . . . . . . . . . . . . . . . . . . . . . .6

Storage server components . . . . . . . . . . . . . . . . . . . . .7

||

Intermixing storage expansion enclosures in the same drive loop . . . . .10

Controllers . . . . . . . . . . . . . . . . . . . . . . . . .10

Controller cable connections . . . . . . . . . . . . . . . . . .11

||

Setting up IP addresses for DS4000 storage controllers . . . . . . . .14

Controller memory . . . . . . . . . . . . . . . . . . . . .16

Power supply-fans . . . . . . . . . . . . . . . . . . . . . .17

Interconnect-battery unit . . . . . . . . . . . . . . . . . . . .18

SFP modules . . . . . . . . . . . . . . . . . . . . . . . .20

Specifications . . . . . . . . . . . . . . . . . . . . . . . . .21

Area requirements . . . . . . . . . . . . . . . . . . . . . .21

Dimensions . . . . . . . . . . . . . . . . . . . . . . . .21

Weight . . . . . . . . . . . . . . . . . . . . . . . . . .21

Shipping dimensions . . . . . . . . . . . . . . . . . . . . .22

Environmental requirements and specifications . . . . . . . . . . . .22

Temperature and humidity . . . . . . . . . . . . . . . . . . .22

Altitude . . . . . . . . . . . . . . . . . . . . . . . . . .23

Airflow and heat dissipation . . . . . . . . . . . . . . . . . .23

||

Shock and vibration requirements . . . . . . . . . . . . . . . .24

Acoustic noise . . . . . . . . . . . . . . . . . . . . . . .25

Electrical requirements . . . . . . . . . . . . . . . . . . . . .25

Site wiring and power . . . . . . . . . . . . . . . . . . . .26

AC power recovery . . . . . . . . . . . . . . . . . . . . .26

© Copyright IBM Corp. 2006, 2007 ix

Power cords and receptacles . . . . . . . . . . . . . . . . . .26

Chapter 2. Installing the storage subsystem . . . . . . . . . . . . .27

Installation overview . . . . . . . . . . . . . . . . . . . . . . .27

Handling static-sensitive devices . . . . . . . . . . . . . . . . . .29

Heat output, airflow, and cooling . . . . . . . . . . . . . . . . . .29

Preparing for installation . . . . . . . . . . . . . . . . . . . . .30

Preparing the site . . . . . . . . . . . . . . . . . . . . . . .32

Preparing the rack cabinet . . . . . . . . . . . . . . . . . . . .32

Installing the support rails . . . . . . . . . . . . . . . . . . . . .33

Installing the DS4800 . . . . . . . . . . . . . . . . . . . . . .37

Releasing and locking a component lever . . . . . . . . . . . . . .38

Removing the components . . . . . . . . . . . . . . . . . . .40

Installing the DS4800 on the support rails . . . . . . . . . . . . . .42

Replacing the components . . . . . . . . . . . . . . . . . . .44

Chapter 3. Cabling the storage subsystem . . . . . . . . . . . . . .47

Working with SFPs and fiber-optic cables . . . . . . . . . . . . . . .47

Handling fiber-optic cables . . . . . . . . . . . . . . . . . . .48

Installing SFP modules . . . . . . . . . . . . . . . . . . . . .48

Removing SFP modules . . . . . . . . . . . . . . . . . . . .50

Installing fiber-optic cables . . . . . . . . . . . . . . . . . . .51

Using LC-LC fibre-channel cables . . . . . . . . . . . . . . . . .52

Connecting an LC-LC cable to an SFP module . . . . . . . . . . .53

Removing an LC-LC fibre-channel cable . . . . . . . . . . . . .55

Using LC-SC fibre-channel cable adapters . . . . . . . . . . . . . .55

Connecting an LC-SC cable adapter to a device . . . . . . . . . .56

Removing an LC-LC cable from an LC-SC cable adapter . . . . . . .58

Connecting storage expansion enclosures to the DS4800 . . . . . . . . .59

Redundant drive channel pair . . . . . . . . . . . . . . . . . .59

Overview of steps to connect storage expansion enclosure to a storage

subsystem . . . . . . . . . . . . . . . . . . . . . . . . .62

DS4800 drive cabling rules and recommendations . . . . . . . . . . .67

DS4800 Storage Subsystem drive cabling topologies . . . . . . . . . .69

One DS4800 and one storage expansion enclosure . . . . . . . . .70

One DS4800 and two storage expansion enclosures . . . . . . . . .71

One DS4800 and four storage expansion enclosures . . . . . . . . .73

One DS4800 and eight storage expansion enclosures . . . . . . . .75

One DS4800 and fourteen EXP810 storage expansion enclosures . . . .76

One DS4800 and sixteen EXP710 storage expansion enclosures . . . .78

One DS4800 to seven EXP810 and eight EXP710 storage expansion

enclosures . . . . . . . . . . . . . . . . . . . . . . . .80

|
||

One DS4800 to two or more storage expansion enclosures in a mixed

environment . . . . . . . . . . . . . . . . . . . . . . .81

Cabling the storage expansion enclosures to a DS4800 storage subsystem 84

Storage expansion enclosure settings . . . . . . . . . . . . . . .85

Fibre channel loop and ID settings . . . . . . . . . . . . . . . .86

DS4000 storage expansion enclosure ID settings . . . . . . . . . .86

Connecting hosts to the DS4800 . . . . . . . . . . . . . . . . . .87

Connecting secondary interface cables . . . . . . . . . . . . . . . .89

Configuring the storage subsystem . . . . . . . . . . . . . . . . .90

Storage subsystem management methods . . . . . . . . . . . . . .90

Host-agent (in-band) management method . . . . . . . . . . . . .91

Direct (out-of-band) management method . . . . . . . . . . . . .91

Fibre channel connections . . . . . . . . . . . . . . . . . . . .92

Fibre channel host loop configurations . . . . . . . . . . . . . . .93

x IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Redundant host and drive loops . . . . . . . . . . . . . . . .93

Installing the storage subsystem configuration . . . . . . . . . . . . .96

Connecting the power cables . . . . . . . . . . . . . . . . . . . .96

Chapter 4. Operating the storage subsystem . . . . . . . . . . . . 101

Performing the DS4000 Health Check process . . . . . . . . . . . . . 102

Web pages . . . . . . . . . . . . . . . . . . . . . . . . . 103

Hardware responsibilities . . . . . . . . . . . . . . . . . . . . 103

Removing and replacing the front bezel . . . . . . . . . . . . . . . 104

Turning the storage subsystem on and off . . . . . . . . . . . . . . 104

Turning on the storage subsystem . . . . . . . . . . . . . . . . 105

Turning off the storage subsystem . . . . . . . . . . . . . . . . 108

Restoring power after an unexpected shutdown . . . . . . . . . . . .110

Performing an emergency shutdown . . . . . . . . . . . . . . . . 111

Restoring power after an emergency shutdown . . . . . . . . . . . . 111

Responding to the audible alarm . . . . . . . . . . . . . . . . . .113

Installing the DS4000 Storage Manager client . . . . . . . . . . . . .114

Firmware requirements . . . . . . . . . . . . . . . . . . . .114

Monitoring status through software . . . . . . . . . . . . . . . . .115

Firmware updates . . . . . . . . . . . . . . . . . . . . . .116

Troubleshooting the storage subsystem . . . . . . . . . . . . . .117

Checking the LEDs . . . . . . . . . . . . . . . . . . . . . . .118

Front bezel LEDs . . . . . . . . . . . . . . . . . . . . . .118

RAID controller LEDs . . . . . . . . . . . . . . . . . . . . . 120

Numeric display LEDs . . . . . . . . . . . . . . . . . . . . . 123

Power supply-fan LEDs . . . . . . . . . . . . . . . . . . . . 125

Interconnect-battery unit LEDs . . . . . . . . . . . . . . . . . . 127

Recovering from an overheated power supply and fan unit . . . . . . . . 129

Resetting the controller circuit breakers . . . . . . . . . . . . . . . 131

Cache memory and cache battery . . . . . . . . . . . . . . . . . 137

Cache memory . . . . . . . . . . . . . . . . . . . . . . . 137

Subsystem cache battery . . . . . . . . . . . . . . . . . . . 138

Chapter 5. Replacing components . . . . . . . . . . . . . . . . 141

Handling static-sensitive devices . . . . . . . . . . . . . . . . . . 141

Service Action Allowed status LED . . . . . . . . . . . . . . . . . 142

Single component failures . . . . . . . . . . . . . . . . . . . 142

Multiple component failures . . . . . . . . . . . . . . . . . . . 143

Releasing a component lever . . . . . . . . . . . . . . . . . . . 144

Replacing a controller . . . . . . . . . . . . . . . . . . . . . . 145

Upgrading controllers . . . . . . . . . . . . . . . . . . . . . . 150

Replacing a power supply and fan unit . . . . . . . . . . . . . . . . 152

Replacing the interconnect-battery unit . . . . . . . . . . . . . . . . 156

Replacing a backup battery pack . . . . . . . . . . . . . . . . . . 160

Replacing an SFP module . . . . . . . . . . . . . . . . . . . . 163

Installing SFPs and fiber-optic cables . . . . . . . . . . . . . . . . 166

Chapter 6. Hardware maintenance . . . . . . . . . . . . . . . . 167

General checkout . . . . . . . . . . . . . . . . . . . . . . . 167

Using the diagnostic hardware . . . . . . . . . . . . . . . . . . 167

Solving problems . . . . . . . . . . . . . . . . . . . . . . 167

Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Appendix A. Additional DS4000 documentation . . . . . . . . . . . 177

DS4000 Storage Manager Version 9 library . . . . . . . . . . . . . . 177

DS4800 Storage Subsystem library . . . . . . . . . . . . . . . . . 178

Contents xi

DS4700 Storage Subsystem library . . . . . . . . . . . . . . . . . 179

DS4500 Storage Subsystem library . . . . . . . . . . . . . . . . . 180

DS4400 Storage Subsystem library . . . . . . . . . . . . . . . . . 181

DS4300 Storage Subsystem library . . . . . . . . . . . . . . . . . 182

DS4200 Express Storage Subsystem library . . . . . . . . . . . . . 183

DS4100 Storage Subsystem library . . . . . . . . . . . . . . . . . 184

DS4000 Storage Expansion Enclosure documents . . . . . . . . . . . 185

Other DS4000 and DS4000-related documents . . . . . . . . . . . . 186

Appendix B. Records . . . . . . . . . . . . . . . . . . . . . 187

Identification numbers . . . . . . . . . . . . . . . . . . . . . . 187

Appendix C. Rack mounting templates . . . . . . . . . . . . . . . 189

Appendix D. Power cords . . . . . . . . . . . . . . . . . . . . 193

Appendix E. Accessibility . . . . . . . . . . . . . . . . . . . . 195

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Important notes . . . . . . . . . . . . . . . . . . . . . . . . 198

Product recycling and disposal . . . . . . . . . . . . . . . . . . 199

Battery return program . . . . . . . . . . . . . . . . . . . . . 199

Electronic emission notices . . . . . . . . . . . . . . . . . . . . 200

Federal Communications Commission (FCC) statement . . . . . . . . 200

Chinese class A compliance statement . . . . . . . . . . . . . . . 200

Industry Canada Class A emission compliance statement . . . . . . . . 201

Australia and New Zealand Class A statement . . . . . . . . . . . . 201

European Union EMC Directive conformance statement . . . . . . . . 201

Taiwanese Class A warning statement . . . . . . . . . . . . . . . 201

Japanese Voluntary Control Council for Interference (VCCI) statement 202

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

xii IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Figures

1. DS4800 Storage Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2. Location of components in the storage subsystem . . . . . . . . . . . . . . . . . . .9

3. Controllers in the storage subsystem . . . . . . . . . . . . . . . . . . . . . . .11

4. Controller connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

5. DS4800 configuration with 2 Gbps and 4 Gbps enclosures in different drive channel pairs . . . .13

6. Power supply-fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

7. Interconnect-battery unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

8. SFP module with fiber-optic cable . . . . . . . . . . . . . . . . . . . . . . . .20

9. DS4800 Storage Subsystem dimensions . . . . . . . . . . . . . . . . . . . . . .21

10. DS4800 Storage Subsystem airflow . . . . . . . . . . . . . . . . . . . . . . . .24

11. Example of cold aisle/hot aisle rack cabinet configuration . . . . . . . . . . . . . . . .30

12. DS4800 front rack mounting template . . . . . . . . . . . . . . . . . . . . . . .34

||

13. DS4800 rear rack mounting template . . . . . . . . . . . . . . . . . . . . . . .35

14. DS4800 support rail assembly . . . . . . . . . . . . . . . . . . . . . . . . . .36

||

15. DS4800 Storage Subsystem front views and back view . . . . . . . . . . . . . . . .38

16. Component lever and latch . . . . . . . . . . . . . . . . . . . . . . . . . . .39

17. Removing the power supply and fan units . . . . . . . . . . . . . . . . . . . . .41

18. Removing the interconnect-battery unit . . . . . . . . . . . . . . . . . . . . . . .41

19. Removing the controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

20. Securing the DS4800 to the rack cabinet . . . . . . . . . . . . . . . . . . . . . .44

21. Replacing the power supply and fan units . . . . . . . . . . . . . . . . . . . . . .45

22. Replacing the interconnect-battery unit . . . . . . . . . . . . . . . . . . . . . . .45

23. Replacing the controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

24. Removing the front bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

25. Small Form-Factor Pluggable (SFP) module . . . . . . . . . . . . . . . . . . . . .49

26. Replacing an SFP module . . . . . . . . . . . . . . . . . . . . . . . . . . .50

27. Unlocking the SFP module latch - plastic variety . . . . . . . . . . . . . . . . . . .51

28. Unlocking the SFP module latch - wire variety . . . . . . . . . . . . . . . . . . . .51

29. Removing caps from fiber-optic cables . . . . . . . . . . . . . . . . . . . . . . .52

30. Connecting fiber-optic cable to SFP . . . . . . . . . . . . . . . . . . . . . . . .52

31. LC-LC fibre-channel cable . . . . . . . . . . . . . . . . . . . . . . . . . . .53

32. Removing fiber-optic cable protective caps . . . . . . . . . . . . . . . . . . . . .54

33. Inserting an LC-LC fibre-channel cable into an SFP module . . . . . . . . . . . . . . .54

34. LC-LC fibre-channel cable lever and latches . . . . . . . . . . . . . . . . . . . . .55

35. Removing the LC-LC fibre-channel cable . . . . . . . . . . . . . . . . . . . . . .55

36. LC-SC fibre-channel cable adapter . . . . . . . . . . . . . . . . . . . . . . . .56

37. Removing the LC-SC cable adapter protective caps . . . . . . . . . . . . . . . . . .57

38. Connecting an LC-LC cable into the LC-SC cable adapter . . . . . . . . . . . . . . .57

39. LC-LC fibre-channel cable lever and latches . . . . . . . . . . . . . . . . . . . . .58

40. Removing the LC-LC fibre-channel cable from an LC-SC fibre-channel cable adapter . . . . .58

41. Example 1 of redundant drive channel pairs . . . . . . . . . . . . . . . . . . . . .61

42. Example 2 of redundant drive channel pairs . . . . . . . . . . . . . . . . . . . . .62

43. EXP710 /EXP100 port labels . . . . . . . . . . . . . . . . . . . . . . . . . .63

44. Connecting EXP710 or EXP100 enclosures to DS4800 . . . . . . . . . . . . . . . . .64

45. EXP810 port labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

46. Connecting EXP810 enclosures to DS4800 . . . . . . . . . . . . . . . . . . . . .66

47. DS4800 Storage Subsystem ports and controllers . . . . . . . . . . . . . . . . . . .70

48. One DS4800 and one storage expansion enclosure — Recommended cabling . . . . . . . .71

49. View 1: One DS4800 and two storage expansion enclosures cabling—recommended . . . . .72

50. View 2: One DS4800 and two storage expansion enclosures cabling — not recommended 73

51. One DS4800 and four storage expansion enclosures—recommended cabling . . . . . . . .74

52. One DS4800 and eight storage expansion enclosures—recommended cabling . . . . . . . .75

53. One DS4800 and fourteen EXP810 storage expansion enclosures—recommended cabling 77

© Copyright IBM Corp. 2006, 2007 xiii

54. One DS4800 and sixteen EXP710 storage expansion enclosure—recommended cabling . . . .78

55. One DS4800 to seven EXP810 and eight EXP710 storage expansion enclosures—recommended

cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

56. Acceptable EXP710, EXP810 and EXP100 intermix configuration in a DS4800 environment 82

||

57. Unacceptable EXP710, EXP810 and EXP100 intermix configuration in a DS4800 environment 83

||

58. Cabling variations when intermixing EXP100, EXP710, and EXP810 storage expansion

|
||

enclosures behind a DS4800 Storage Subsystem . . . . . . . . . . . . . . . . . . .84

59. Installing an SFP module and LC-LC cable in a DS4800 . . . . . . . . . . . . . . . .85

60. Installing an SFP module and connecting an LC-LC cable to the storage expansion enclosures 85

61. Location of host cables on RAID controllers . . . . . . . . . . . . . . . . . . . . .88

62. Cabling diagram for four redundant host connections . . . . . . . . . . . . . . . . .89

63. Ethernet and serial port locations . . . . . . . . . . . . . . . . . . . . . . . . .90

64. Host-agent (in-band) managed storage subsystems . . . . . . . . . . . . . . . . . .91

65. Direct (out-of-band) managed storage subsystems . . . . . . . . . . . . . . . . . .92

66. Examples of redundant host direct attached fibre channel configurations . . . . . . . . . .94

67. Example of a single SAN fabric configuration . . . . . . . . . . . . . . . . . . . .95

68. Example of two storage subsystems in a dual SAN environment . . . . . . . . . . . . .95

69. Example of a two-cluster configuration . . . . . . . . . . . . . . . . . . . . . . .96

70. AC power switch and AC and DC power connectors . . . . . . . . . . . . . . . . . .98

71. Redundant AC power connections to controllers and storage expansion enclosures . . . . . .99

72. Installing the front bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

73. AC power switches on the controllers . . . . . . . . . . . . . . . . . . . . . . . 106

74. Front bezel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

75. RAID controller LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

76. Numeric display LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

77. Power supply-fan LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

78. Interconnect-battery unit LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 127

79. Power supply-fan Needs Attention LEDs . . . . . . . . . . . . . . . . . . . . . . 133

80. RAID controller connections . . . . . . . . . . . . . . . . . . . . . . . . . . 134

81. Removing the controller from the storage subsystem . . . . . . . . . . . . . . . . . 135

82. Circuit breaker access holes . . . . . . . . . . . . . . . . . . . . . . . . . . 135

83. Cache Active LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

84. Battery LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

85. Component lever and latch . . . . . . . . . . . . . . . . . . . . . . . . . . 144

86. RAID controller Needs Attention and Service Action Allowed LEDs . . . . . . . . . . . . 146

87. Connectors on the back of each controller . . . . . . . . . . . . . . . . . . . . . 147

88. Unlocking the SFP module latch - plastic variety . . . . . . . . . . . . . . . . . . . 147

89. Unlocking the SFP module latch - wire variety . . . . . . . . . . . . . . . . . . . 148

90. Removing a controller from the DS4800 . . . . . . . . . . . . . . . . . . . . . . 148

91. Overall DS4800 Configuration Needs Attention LED on the DS4800 front bezel . . . . . . . 153

92. Power supply-fan LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

93. Removing a power supply and fan unit from the DS4800 . . . . . . . . . . . . . . . 155

94. Overall DS4800 Configuration Needs Attention LED on the DS4800 front bezel . . . . . . . 157

95. Interconnect-battery unit Needs Attention and Service Action Allowed LEDs . . . . . . . . . 158

96. Removing an interconnect-battery unit from the DS4800 . . . . . . . . . . . . . . . . 159

97. Overall DS4800 Configuration Needs Attention LED on the DS4800 front bezel . . . . . . . 161

98. Battery access cover on the interconnect-battery unit . . . . . . . . . . . . . . . . . 161

99. Overall DS4800 Configuration Needs Attention LED on the DS4800 front bezel . . . . . . . 164

100. Needs Attention and SFP Model Bypass LEDs . . . . . . . . . . . . . . . . . . . 164

101. Replacing an SFP module . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

102. DS4800 parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

103. Location of MAC address labels . . . . . . . . . . . . . . . . . . . . . . . . . 187

104. DS4800 front rack mounting template . . . . . . . . . . . . . . . . . . . . . . . 190

105. DS4800 rear rack mounting template . . . . . . . . . . . . . . . . . . . . . . . 191

xiv IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Tables

1. Mapping of FAStT names to DS4000 series names . . . . . . . . . . . . . . . . . . xvii

2. Where to find DS4000 installation and configuration procedures . . . . . . . . . . . . . xix

3. Features at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

4. Maximum number of storage expansion enclosures . . . . . . . . . . . . . . . . . .9

5. Possible combinations of 14-drive and 16-drive storage expansion enclosures per redundant

|
||

||

||
||
||
||

drive/channel loop pair in a DS4800 configuration . . . . . . . . . . . . . . . . . . .10

6. RAID controller specifications . . . . . . . . . . . . . . . . . . . . . . . . . .16

7. DS4800 Storage Subsystem weights . . . . . . . . . . . . . . . . . . . . . . .21

8. DS4800 Storage Subsystem component weights . . . . . . . . . . . . . . . . . . .22

9. DS4800 Storage Subsystem shipping carton dimensions . . . . . . . . . . . . . . . .22

10. Temperature and humidity requirements . . . . . . . . . . . . . . . . . . . . . .22

11. DS4800 Storage Subsystem altitude ranges . . . . . . . . . . . . . . . . . . . . .23

12. DS4800 Storage Subsystem power and heat dissipation . . . . . . . . . . . . . . . .24

13. DS4800 Storage Subsystem operational vibration specifications . . . . . . . . . . . . .25

14. DS4800 Storage Subsystem sound levels . . . . . . . . . . . . . . . . . . . . .25

15. IBM System Storage DS4800 AC power requirements . . . . . . . . . . . . . . . . .25

16. Different ways to connect four storage expansion enclosures to the DS4800 . . . . . . . . .68

17. DS4800 Storage Subsystem drive ports and drive channels . . . . . . . . . . . . . . .70

18. Description of Figure 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

19. Description of Figure 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

20. Description of Figure 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

21. Description of Figure 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

22. Description of Figure 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

23. Description of Figure 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

24. Description of Figure 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

25. Description of Figure 56 on page 82 . . . . . . . . . . . . . . . . . . . . . . . .82

26. Description of Figure 57 on page 83 . . . . . . . . . . . . . . . . . . . . . . . .83

27. Description of Figure 58 on page 84 . . . . . . . . . . . . . . . . . . . . . . . .84

28. Recommended enclosure ID settings scheme . . . . . . . . . . . . . . . . . . . .87

29. Description of Figure 61 . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

30. Description of Figure 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

31. Description of Figure 67 . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

32. Firmware requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

33. Description of Figure 71 . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

34. RAID controller LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

35. Host and drive channel LED definitions . . . . . . . . . . . . . . . . . . . . . . 123

36. Numeric display diagnostic codes . . . . . . . . . . . . . . . . . . . . . . . . 125

37. Power supply-fan LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

38. Interconnect-battery unit LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 127

39. DS4800 Symptom-to-FRU index . . . . . . . . . . . . . . . . . . . . . . . . . 168

40. Parts list (System Storage DS4800 Storage Subsystem) . . . . . . . . . . . . . . . . 175

41. DS4000 Storage Manager Version 9 titles by user tasks . . . . . . . . . . . . . . . . 177

42. DS4800 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 178

43. DS4700 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 179

44. DS4500 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 180

45. DS4400 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 181

46. DS4300 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 182

47. DS4200 Express Storage Subsystem document titles by user tasks . . . . . . . . . . . 183

48. DS4100 Storage Subsystem document titles by user tasks . . . . . . . . . . . . . . . 184

49. DS4000 Storage Expansion Enclosure document titles by user tasks . . . . . . . . . . . 185

50. DS4000 and DS4000–related document titles by user tasks . . . . . . . . . . . . . . 186

51. DS4000 Storage Manager alternate keyboard operations . . . . . . . . . . . . . . . 195

© Copyright IBM Corp. 2006, 2007 xv

xvi IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

About this document

This document provides instructions for installing and customizing the configuration
of your IBM System Storage DS4800 Storage Subsystem. It also provides hardware
maintenance procedures and troubleshooting information.

FAStT product renaming

IBM has renamed some FAStT family products. Table 1 identifies each DS4000
product name with its corresponding previous FAStT product name. Note that this
change of product name only indicates no change in functionality or warranty. All
products listed below with new names are functionally equivalent and fully
interoperable. Each DS4000 product retains full IBM service as outlined in service
contracts issued for analogous FAStT products.

Table 1. Mapping of FAStT names to DS4000 series names

Previous FAStT Product Name Current DS4000 Product Name

IBM TotalStorage FAStT Storage Server IBM TotalStorage DS4000

FAStT DS4000

FAStT Family DS4000 Mid-range Disk System

FAStT Storage Manager vX.Y (for example
v9.10)

FAStT100 DS4100

FAStT600 DS4300

FAStT600 with Turbo Feature DS4300 Turbo

FAStT700 DS4400

FAStT900 DS4500

EXP700 DS4000 EXP700

EXP710 DS4000 EXP710

EXP100 DS4000 EXP100

FAStT FlashCopy FlashCopy for DS4000

FAStT VolumeCopy VolumeCopy for DS4000

FAStT Remote Mirror (RM) Enhanced Remote Mirroring for DS4000

FAStT Synchronous Mirroring Metro Mirroring for DS4000

DS4000 Storage Manager vX.Y (for example
v9.10)

Global Copy for DS4000
(New Feature = Asynchronous Mirroring
without Consistency Group)

Global Mirroring for DS4000
(New Feature = Asynchronous Mirroring with
Consistency Group)

Who should read this document

This document is intended for system operators and service technicians who have
extensive knowledge of fibre channel and network technology.

© Copyright IBM Corp. 2006, 2007 xvii

How this document is organized

Chapter 1, “Introduction,” on page 1 describes the IBM System Storage DS4800
Storage Subsystem. This chapter includes an inventory checklist and an overview
of the storage subsystem features, operating specifications, and components.

Chapter 2, “Installing the storage subsystem,” on page 27 contains instructions for
installing the DS4800 Storage Subsystem in a standard rack cabinet and setting the
interface options.

Chapter 3, “Cabling the storage subsystem,” on page 47 contains fibre channel and
power cabling information for the DS4800 Storage Subsystem.

Chapter 4, “Operating the storage subsystem,” on page 101 contains instructions for
powering the DS4800 Storage Subsystem on or off during either normal or
emergency situations. It also contains information on how to check the LEDs on the
front and back of the storage subsystem.

Chapter 5, “Replacing components,” on page 141 contains step-by-step instructions
for how to install or remove customer replaceable units (CRUs), such as power
supply and fan units, RAID controllers, and interconnect-battery units.

Chapter 6, “Hardware maintenance,” on page 167 contains problems, symptoms,
and error messages that are specific to the DS4800 Storage Subsystem. It also
contains the parts listing for the DS4800 Storage Subsystem.

Appendix A, “Additional DS4000 documentation,” on page 177 provides references
to other DS4000 publications.

Appendix B, “Records,” on page 187 provides a table that you can use to record
and update important information about your DS4800, including serial number,
model and machine type, and MAC addresses.

Appendix C, “Rack mounting templates,” on page 189 provides the rack mounting
templates for installation of the DS4800. If you want to tear out the templates from
the document for use during installation, use these copies of the templates.

Appendix D, “Power cords,” on page 193 lists power cord information for the
DS4800.

Appendix E, “Accessibility,” on page 195 provides information about DS4000
Storage Manager accessibility features.

DS4000 Storage Subsystem installation tasks - General overview

Table 2 on page xix provides a sequential list of many installation and configuration
tasks that are common to most DS4000 configurations. When you install and
configure your DS4000 storage subsystem, refer to this table to find the
documentation that explains how to complete each task.

also: The DS4000 Storage Server and Storage Expansion Enclosure Quick

See

Start Guide provides an excellent overview of the installation process.

xviii IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Table 2. Where to find DS4000 installation and configuration procedures

Installation task Where to find information or procedures

1 Plan the installation

v DS4000 Storage Manager Concepts Guide

v DS4000 Storage Manager Installation and Support Guide for

AIX, HP-UX, Solaris and Linux on POWER

v DS4000 Storage Manager Installation and Support Guide for

Windows 2000/Server 2003, NetWare, ESX Server, and
Linux

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User's, and

Maintenance Guide

v DS4400 Fibre Channel Storage Server Installation and

Support Guide

v DS4500 Storage Subsystem Installation, User's, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

2 Mount the DS4000

storage subsystem in
the rack

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 and DS4500 Rack Mounting Instructions

v DS4300 Rack Mounting Instructions

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4100 Storage Subsystem Installation, User’s and

Maintenance Guide

3 Mount the DS4000

EXP storage
expansion unit in the
rack

v DS4000 EXP100 Storage Expansion Unit Installation, User’s

and Maintenance Guide

v DS4000 EXP420 Storage Expansion Enclosures Installation,

User’s, and Maintenance Guide

v DS4000 EXP700 and EXP710 Storage Expansion Enclosures

Installation, User’s, and Maintenance Guide

v DS4000 EXP810 Storage Expansion Enclosures Installation,

User’s, and Maintenance Guide

v FAStT EXP500 Installation and User’s Guide

About this document xix

Table 2. Where to find DS4000 installation and configuration procedures (continued)

Installation task Where to find information or procedures

4 Route the storage

expansion unit Fibre
Channel cables

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 Fibre Channel Cabling Instructions

v DS4500 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

5 Route the host

server Fibre Channel
cables

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 Fibre Channel Cabling Instructions

v DS4500 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

6 Power up the

subsystem

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 Fibre Channel Storage Server Installation and

Support Guide

v DS4500 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

xx IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Table 2. Where to find DS4000 installation and configuration procedures (continued)

Installation task Where to find information or procedures

7 Configure DS4000

network settings

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 Fibre Channel Storage Server Installation and

Support Guide

v DS4500 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

8 Zone the fabric

switch
(SAN-attached only)

v DS4000 Storage Manager Installation and Support Guide for

AIX, HP-UX, Solaris and Linux on POWER

v DS4000 Storage Manager Installation and Support Guide for

Windows 2000/Server 2003, NetWare, ESX Server, and
Linux

v DS4000 Storage Manager Copy Services Guide (describes

switch zoning for the Remote Mirror Option)

v See also the documentation provided by the switch

manufacturer.

9 Install DS4000

Storage Manager
software on the
management station

10 Install host software

(failover drivers) on
host server

v DS4000 Storage Manager Installation and Support Guide for

AIX, HP-UX, Solaris and Linux on POWER

v DS4000 Storage Manager Installation and Support Guide for

Windows 2000/Server 2003, NetWare, ESX Server, and
Linux

v DS4000 Storage Manager online help (for post-installation

tasks)

11 Start DS4000

Storage Manager

12 Set the DS4000

Storage Manager
clock

13 Set the DS4000

Storage Manager
host default type

About this document xxi

Table 2. Where to find DS4000 installation and configuration procedures (continued)

Installation task Where to find information or procedures

14 Verify DS4000

subsystem health

15 Enable DS4000

Storage Manager
premium feature
keys

v DS4100 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4200 Express Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4300 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4400 Fibre Channel Storage Server Installation and

Support Guide

v DS4500 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4700 Storage Subsystem Installation, User’s, and

Maintenance Guide

v DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

Copy Services premium features

DS4000 Storage Manager Copy Services Guide

FC/SATA Intermix premium feature

DS4000 Fibre Channel and Serial ATA Intermix
Premium Feature Installation Overview

Storage Partitioning (and general premium features
information)

v DS4000 Storage Manager Concepts Guide

v DS4000 Storage Manager Installation and Support

Guide for AIX, HP-UX, Solaris and Linux on POWER

v DS4000 Storage Manager Installation and Support

Guide for Windows 2000/Server 2003, NetWare,
ESX Server, and Linux

16 Configure arrays and

logical drives

17 Configure host

partitions

18 Verify host access to

DS4000 storage

v DS4000 Storage Manager Installation and Support Guide for

AIX, HP-UX, Solaris and Linux on POWER

v DS4000 Storage Manager Installation and Support Guide for

Windows 2000/Server 2003, NetWare, ESX Server, and
Linux

v DS4000 Storage Manager online help

Getting information, help, and service

If you need help, service, or technical assistance or just want more information
about IBM products, you will find a wide variety of sources available from IBM to
assist you. This section contains information about where to go for additional
information about IBM and IBM products, what to do if you experience a problem
with your system, and whom to call for service, if it is necessary.

Before you call

Before you call, take these steps to try to solve the problem yourself:

v Check all cables to make sure that they are connected.

v Check the power switches to make sure that the system is turned on.

xxii IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

v Use the troubleshooting information in your system documentation, and use the

diagnostic tools that come with your system.

v Check for technical information, hints, tips, and new device drivers at the IBM

support Web site pages that are listed in this section.

v Use an IBM discussion forum on the IBM Web site to ask questions.

can solve many problems without outside assistance by following the

You
troubleshooting procedures that IBM provides in the DS4000 Storage Manager
online help or in the documents that are provided with your system and software.
The information that comes with your system also describes the diagnostic tests
that you can perform. Most subsystems, operating systems, and programs come
with information that contains troubleshooting procedures and explanations of error
messages and error codes. If you suspect a software problem, see the information
for the operating system or program.

Using the documentation

Information about your IBM system and preinstalled software, if any, is available in
the documents that come with your system. This includes printed books, online
documents, readme files, and help files. See the troubleshooting information in your
system documentation for instructions for using the diagnostic programs. The
troubleshooting information or the diagnostic programs might tell you that you need
additional or updated device drivers or other software.

Web sites

The most up-to-date information about DS4000 storage subsystems and DS4000
Storage Manager, including documentation and the most recent software, firmware,
and NVSRAM downloads, can be found at the following Web sites.

DS4000 Midrange Disk Systems

Find the latest information about IBM System Storage disk storage systems,
including all of the DS4000 storage subsystems:

www-1.ibm.com/servers/storage/disk/ds4000/

IBM System Storage products

Find information about all IBM System Storage products:

www.storage.ibm.com/

Support for IBM System Storage disk storage systems

Find links to support pages for all IBM System Storage disk storage
systems, including DS4000 storage subsystems and expansion units:

www-304.ibm.com/jct01004c/systems/support/supportsite.wss/
brandmain?brandind=5345868

System Storage DS4000 interoperability matrix

Find the latest information about operating system and HBA support,
clustering support, storage area network (SAN) fabric support, and DS4000
Storage Manager feature support:

www-1.ibm.com/servers/storage/disk/ds4000/interop-matrix.html

DS4000 Storage Manager readme files

1. Go to the following Web site:

www-304.ibm.com/jct01004c/systems/support/supportsite.wss/
brandmain?brandind=5345868

About this document xxiii

2. In the Product family drop-down menu, select Disk systems, and in the

Product drop-down menu, select your Storage Subsystem (for example,
DS4800 Midrange Disk System). Then click Go.

3. When the subsystem support page opens, click the Install/use tab, then
click the DS4000 Storage Manager Pubs and Code link. The
Downloads page for the subsystem opens.

4. When the download page opens, ensure that the Storage Mgr tab is
selected. A table displays.

5. In the table, find the entry that lists the Storage Manager package for
your operating system, then click on the corresponding v9.xx link in the
“Current version and readmes” column. The Storage Manager page for
your operating system opens.

6. Click the link for the readme file.

Storage

Area Network (SAN) support

Find information about using SAN switches, including links to user guides
and other documents:

www.ibm.com/servers/storage/support/san/index.html

DS4000 technical support

Find downloads, hints and tips, documentation, parts information, HBA and
Fibre Channel support:

www-304.ibm.com/jct01004c/systems/support/supportsite.wss/
brandmain?brandind=5345868In
Disk systems, and in the Product drop-down menu, select your Storage
Subsystem (for example, DS4800 Midrange Disk System). Then click Go.

Premium feature activation

Generate a DS4000 premium feature activation key file by using the online
tool:

www-912.ibm.com/PremiumFeatures/jsp/keyInput.jsp

IBM publications center

Find IBM publications:

www.ibm.com/shop/publications/order/

Support for System p servers

Find the latest information supporting System p AIX and Linux servers:

the Product family drop-down menu, select

www-304.ibm.com/jct01004c/systems/support/supportsite.wss/
brandmain?brandind=5000025

Support for System x servers

Find the latest information supporting System x Intel- and AMD-based
servers:

www-304.ibm.com/jct01004c/systems/support/supportsite.wss/
brandmain?brandind=5000008

Fix delivery center for AIX and Linux on POWER

Find the latest AIX and Linux on POWER information and downloads:

www-912.ibm.com/eserver/support/fixes/fcgui.jsp

In the Product family drop-down menu, select UNIX servers. Then select
your product and fix type from the subsequent drop-down menus.

xxiv IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Eserver System p and AIX information center

Find everything you need to know about using AIX with System p and
POWER servers:

publib.boulder.ibm.com/infocenter/pseries/index.jsp?

Support for Linux on System p

Find information about using Linux on System p servers:

www.ibm.com/servers/eserver/pseries/linux/

Linux on POWER resource center

Find information about using Linux on POWER servers:

www.ibm.com/servers/enable/linux/power/

Software service and support

Through IBM Support Line, for a fee you can get telephone assistance with usage,
configuration, and software problems. For information about which products are
supported by Support Line in your country or region, go to the following Web site:

www.ibm.com/services/sl/products/

For more information about the IBM Support Line and other IBM services, go to the
following Web sites:

v www.ibm.com/services/

v www.ibm.com/planetwide/

Hardware service and support

You can receive hardware service through IBM Integrated Technology Services or
through your IBM reseller, if your reseller is authorized by IBM to provide warranty
service. Go to the following Web site for support telephone numbers:

www.ibm.com/planetwide/

In the U.S. and Canada, hardware service and support is available 24 hours a day,
7 days a week. In the U.K., these services are available Monday through Friday,
from 9 a.m. to 6 p.m.

Fire suppression systems

A fire suppression system is the responsibility of the customer. The customer’s own
insurance underwriter, local fire marshal, or a local building inspector, or both,
should be consulted in selecting a fire suppression system that provides the correct
level of coverage and protection. IBM designs and manufactures equipment to
internal and external standards that require certain environments for reliable
operation. Because IBM does not test any equipment for compatibility with fire
suppression systems, IBM does not make compatibility claims of any kind nor does
IBM provide recommendations on fire suppression systems.

How to send your comments

Your feedback is important to help us provide the highest quality information. If you
have any comments about this document, you can submit them in one of the
following ways:

E-mail

About this document xxv

Mail

Submit your comments by e-mail to:

[e-mail]

Be sure to include the name and order number of the document and, if
applicable, the specific location of the text that you are commenting on,
such as a page number or table number.

Fill out the Readers’ Comments form (RCF) at the back of this document
and return it by mail or give it to an IBM representative.

If the RCF has been removed, send your comments to:

International

Business Machines Corporation

Information Development
Department GZW
9000 South Rita Road
Tucson, Arizona
USA
85744-0001

Be sure to include the name and order number of the document and, if

applicable, the specific location of the text that you are commenting on,
such as a page number or table number.

Notices and statements used in this document

The caution and danger statements used in this document also appear in the
multilingual Safety Information document provided with your IBM DS4800. Each
caution and danger statement is numbered for easy reference to the corresponding
statements in the safety document.

The following types of notices and statements are used in this document:

v Note: These notices provide important tips, guidance, or advice.
v Important: These notices provide information or advice that might help you avoid

inconvenient or problem situations.

v Attention: These notices indicate possible damage to programs, devices, or

data. An attention notice is placed just before the instruction or situation in which
damage could occur.

v Caution: These statements indicate situations that can be potentially hazardous

to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.

v Danger: These statements indicate situations that can be potentially lethal or

extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure step or
situation.

xxvi IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Chapter 1. Introduction

This chapter describes the operating specifications, features, and components for
the IBM System Storage® DS4800 (Machine Type 1815) Storage Subsystem
(hereafter referred to as DS4800 or storage subsystem).

This chapter also includes an inventory checklist and important information on best
practices guidelines and product updates for your DS4800.

Overview

IBM DS4000 solutions support the large and growing data storage requirements of
business-critical applications. These scalable IBM DS4000 solutions offer you data
access and protection to meet your existing enterprise storage requirements and
prepare for the future.

The IBM System Storage DS4800 storage system is designed to provide solutions
to meet the needs of midrange/departmental storage requirements, delivering high
performance, advanced function, high availability, modular and scalable storage
capacity, with SAN-attached 4-Gbps fibre channel (FC) connectivity, and support for
RAID levels 0, 1, 3, and 5 up to over 89 terabytes (TB).

Note: The stated maximum capacity was calculated using 224 drives of the

currently available 400G SATA hard drives.

The DS4800 is designed to deliver up to a twofold IOP performance increase over
the current DS4500 offering and represents the sixth-generation architecture of the
DS4000 series family. A 4-U rack-mountable enclosure houses the DS4800
redundant, dual-active intelligent RAID controllers equipped with sixteen 4-Gbps
fibre channel ports (eight ports per controller), for attachment of host servers and
DS4000 storage expansion enclosures.

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The DS4800 supports attachment of up to 16 DS4000 EXP100 or EXP710 storage
expansion enclosures, or up to 14 DS4000 EXP810 storage expansion enclosures,
resulting in the capability to connect to up to 224 disk drives and enabling storage
configurations of over 89 TB. DS4800 models 82A/H, 84A/H and 88A/H support the
attachment of up to 224 drives as standard. The DS4800 model 80A/H supports
only the attachment of up to 112 drives as standard. An entitlement must be
purchased to connect up to 224 drives behind a DS4800 model 80A/H.

The DS4800 supports configurations of FC or Serial Advanced Technology
Attachment ( SATA) disks, or a mix of both types of disk drives by use of the
optional DS4800 Fibre Channel/SATA Enclosure Intermix feature.

Advanced DS4000 storage management, copy service options, and optional
advanced disaster recovery functions are available for the DS4800, including
FlashCopy®, VolumeCopy, and Enhanced Remote Mirroring.

The DS4000 Storage Manager client is also available for the DS4800. This storage
management software is designed to help centralize storage management, help
simplify partitioning of the DS4000 series storage into as many as 64 virtual
servers, and strategically allocate storage capacity to maximize storage space.

The DS4800 RAID controller cache size varies depending the DS4800 model.
Currently, the cache size is either 2 GB, 4 GB or 8 GB. Depending on the model,

© Copyright IBM Corp. 2006, 2007 1

the DS4800 either ships with the 8-storage-partition premium feature or can be
ordered with 8-, 16-, or 64-storage-partition premium features. The operating
system host kit shipped with the DS4800 also depends on the model ordered.
DS4800 models 80H, 82H, 84H, and 88H come with the Windows operating system
and 8 storage partitions. Please contact your IBM sales representatives or reseller
for information on the various DS4800 models and options.

Attention: DS4800 models 82, 84 and 88 will be shipped with controller firmware

version 6.15.xx.xx. The DS4800 model 80 will be shipped with version 6.16.xx.xx
and will not have support for versions 6.15.xx.xx or 6.14.xx.xx as will the other
models.

Fibre channel defined

Fibre channel technology is outlined in the SCSI-3 Fibre Channel Protocol
(SCSI-FCP) standard. Fibre channel is a high-speed data transport technology that
is used for mass storage and networking. Using a fibre-channel arbitrated loop
(FC-AL), more than 100 fibre-channel devices1 can be supported, compared to 15
small computer system interface (SCSI) devices.

The optical fibre channel connection from the DS4800 to fibre channel host bus
adapter ports, or from the DS4800 to DS4000 storage expansion enclosure ports, is
a 4-Gbps fibre channel connection that supports a data transfer rate up to 400
MBps at half-duplex and 800 MBps at full-duplex.

SATA defined

The Serial Advanced Technology Attachment ( SATA) interface offers increased data
rate performance over Parallel Advanced Technology Attachment (ATA), while
maintaining the benefits of ATA. S ATA is designed to overcome the performance
barriers that have been forecasted for current parallel technologies while
maintaining the cost-efficiency of Parallel ATA . SATA specifications allow for thinner,
more flexible cables, and lower pin counts. It also enables easier, more flexible
cable routing management and the use of smaller connectors than is possible with
the existing Parallel ATA technology.

The Serial ATA Working Group introduced the first SATA specification, Serial ATA

1.0, in 2001 http://www.serialata.org.

Features at a glance

Table 3 on page 3 summarizes the features of the storage subsystem. For a list of
the operating specifications, such as weight, height, and heat output, see
“Specifications” on page 21.

1. For the DS4800, each drive is considered to be a device in a fibre channel loop, even though the DS4800 might connect with
SATA as well as fibre channel drives.

2 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Table 3. Features at a glance

General

v Modular components:

– RAID controllers (2), with either 2

GB, 4 GB or 8 GB of cache memory

per controller (depending on model)
– Power supply-cooling fan units (2)
– Interconnect-battery unit (1)

v Technology:

– Support for RAID 0, 1, 3 and 5 disk

arrays
– Support for clustering
– Fibre channel host interface
– Redundant controllers and power

supply/cooling system
– Hot-swap technology for controllers,

power supply and fan units, cache

battery, and interconnect-battery unit

Attention: Never remove the

interconnect-battery unit unless

directed to do so by an IBM Service

representative.

v User interface:

– Built-in power, activity, and fault

(Needs Attention) light emitting
diodes (LEDs)

– Identification labeling on customer

replaceable units (CRUs), rear LEDs,
switches, and connectors

– Easy-to-replace power supply and

fan units, RAID controllers, cache
battery, and interconnect-battery unit

controllers

RAID

v Fibre channel interface: sixteen small

form-factor pluggable (SFP) ports for
incoming and outgoing fibre-channel
cables (There are eight SFP ports on
each RAID controller: four ports are
reserved for host connections and four
ports are reserved for drive expansion
enclosures connections.)

v Host connections: Four

1-Gbps/2-Gbps/4-Gbps
(auto-negotiated) fibre channel host-side
connections per controller

Attached storage expansion enclosures

v Four dual-ported drive channel

connections (2 per RAID controller)
enabled to support 2-Gbps/4 Gbps fibre
channel connections

v Supports attachment of DS4000 2 Gbps

EXP100 and EXP710, and 2 Gbps/4
Gbps EXP810 storage expansion
enclosures
Note: DS4000 EXP700s are not
supported by the DS4800 unless they
have been upgraded (with the DS4000
EXP700 Models 1RU/1RX
Switched-ESM Option Upgrade Kit) to
have the same internal switched
capabilities as the DS4000 EXP710.

Attention: The DS4800 does not

support the attachment of storage
expansion enclosures operating at 1
Gbps, such as the EXP500.

Clustering support

Clustering is a means of sharing array groups among controllers to provide
redundancy of controllers and servers. This redundancy is important if a hardware
component fails. If a hardware component failure occurs in a cluster, another server
takes ownership of the array group.

Clustering requires software specific to your operating system. For more information
about clustering, go to the following Web sites:

v www.pc.ibm.com/us/compat/nos/matrix.shtml

v www-03.ibm.com/servers/storage/disk/ds4000/ds4800/interop.html

Inventory checklist

After you unpack the DS4800, verify that you have the following items. See
“Storage server components” on page 7 for the locations of hardware components
on the DS4800.

Note: Depending on your DS4800 order, your shipping box might contain additional

v Hardware

– One DS4800 bezel (front cover)

– Two RAID controllers (shipped installed in the DS4800)

– Two power supply and fan units (shipped installed in the DS4800)

– One interconnect-battery unit with two cache-backup battery packs (shipped

– Two line cord jumpers

materials not listed in the following checklist. Review the inventory checklist
included in the DS4800 shipping box for any additional parts, and use that
checklist in combination with the following information.

installed in the DS4800)

Chapter 1. Introduction 3

Line cord jumpers are power cables used to connect the DS4800 RAID
controller units to the IBM-certified rack power distribution units (PDUs)
installed in the rack cabinet.

– Eight 4 Gbps SFP modules (These SFP modules are already installed in the

DS4800 drive (4) and host (4) ports.)

– One rack-mounting hardware kit, including:

- Two rails (right and left assemblies)

- Eight M5 black hex-head screws

– Wrap plug and coupler kit

Use the wrap plug and coupler kit for FC link diagnostics. See the IBM

System Storage DS4000 Problem Determination Guide for more information.

Attention: The DS4800 does not ship with region-specific power cords. Yo u

must obtain the IBM-approved power cords for your region. See Appendix D,
“Power cords,” on page 193 for the IBM-approved power cords for your region.

v Software and documentation

– Host software attachment kit

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Depending on the DS4800 model you order, your DS4800 will ship with either
the Microsoft® Windows® host software attachment kit or with your choice of
host software kits (Windows, AIX®, Linux®, Netware, SUN Solaris, HP-UX,
Linux on POWER™, or VMware). The host software kit grants you permission
to attach host servers using the appropriate operating system to the DS4800.
The kit includes a DS4000 Storage Manager Version 9 Support CD that has
the appropriate IBM DS4000 Storage Manager host software. The CD also
contains includes firmware, online help, and publications in Adobe Acrobat
Portable Document Format (PDF). (For a list of available IBM DS4000
publications, see Appendix A, “Additional DS4000 documentation,” on page

177.)

If you order more than one host software kit, the additional kits may also be
shipped in the DS4800 shipping box.

Depending on your DS4800 model, you may need to purchase the

Note:

appropriate host software kit for your host server operating system.
Contact your IBM representative or reseller for more information.

– An eight storage partition premium feature activation kit for models 80H, 82H,

84H and 88H. For models 80A, 82A, 84A and 88A, the storage partition
premium feature activation kit correlates to the number of storage partitions
that you ordered

– IBM System Storage DS4800 Storage Subsystem Installation, User’s, and

Maintenance Guide

– IBM System Storage DS4800 Storage Subsystem Installation and Cabling

Overview

– IBM Safety Information

– IBM License Agreement

– Statement of Limited Warranty

If an item is missing or damaged, contact your IBM reseller or your IBM marketing
representative.

If you have not already done so, record your storage subsystem serial number,
machine type and model number, and RAID controller MAC addresses in
Appendix B, “Records,” on page 187. The serial number, machine type, and model

4 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

number are located on top of the DS4800 subsystem. The MAC addresses are
located near the Ethernet ports on each RAID controller, as shown in Figure 103 on
page 187. You may not be able to easily access this information after you install the
DS4800.

Rack mounting templates for installing the support rails are provided in this
document in Appendix C, “Rack mounting templates,” on page 189.

To connect your DS4800 to other devices, use the following options:

v IBM SFP module

v IBM LC-LC fibre-channel cable

v IBM LC-SC fibre-channel cable (for host-side connections only)

Note:

Product updates

You might need to order these options separately.

Important

In order to keep your system up to date with the latest firmware and other
product updates, use the information below to register and use the My

support Web site.

Download the latest versions of the DS4000 Storage Manager host software,

DS4000 storage server controller firmware, DS4000 drive expansion enclosure ESM
firmware, and drive firmware at the time of the initial installation and when product
updates become available.

To be notified of important product updates, you must first register at the IBM
Support and Download Web site:

www-1.ibm.com/servers/storage/support/disk/index.html

In the Additional Support section of the Web page, click My support. On the next
page, if you have not already done so, register to use the site by clicking Register
now.

Perform the following steps to receive product updates:

1. After you have registered, type your user ID and password to log into the site.

The My support page opens.

2. Click Add products. A pull-down menu displays.

3. In the pull-down menu, select Storage. Another pull-down menu displays.

4. In the new pull-down menu, and in the subsequent pull-down menus that
display, select the following topics:

v Computer Storage
v Disk Storage Systems
v TotalStorage DS4000 Midrange Disk Systems & FAStT Stor Srvrs

During this process a check list displays. Do not check any of the items

Note:

in the check list until you complete the selections in the pull-down
menus.

5. When you finish selecting the menu topics, place a check in the box for the
machine type of your DS4000 series product, as well as any other attached

Chapter 1. Introduction 5

DS4000 series product(s) for which you would like to receive information, then
click Add products. The My Support page opens again.

6. On the My Support page, click the Edit profile tab, then click Subscribe to
email. A pull-down menu displays.

7. In the pull-down menu, select Storage. A check list displays.

8. Place a check in each of the following boxes:
a. Please send these documents by weekly email
b. Downloads and drivers
c. Flashes

d. Any other topics that you may be interested in

click Update.

Then,

9. Click Sign out to log out of My Support.

Best practices guidelines

To ensure optimal operation of your system, always follow these best practices
guidelines:

v Ensure that your system is in an optimal state before you shut it down. Never

turn the power off if any Needs Attention LED is lit; be sure to resolve any error
conditions before you shut down the system.

v Back up the data on your storage drives periodically.

v To maintain power redundancy, plug the DS4800 right and left RAID controller

units into two independent external power circuits through ac distribution units
inside a rack cabinet or directly into external receptacles. Similarly, the right and
left power supplies of the DS4000 storage expansion enclosures attached to the
DS4800 should be plugged into the same two independent external power
circuits as the DS4800. This ensures that the DS4800 and all its attached
storage expansion enclosures will have power in the event that only one power
circuit is available. In addition, having all the right or all the left power cables plug
into the same power circuit enables the DS4000 devices in the configuration to
power on simultaneously during an unattended restoration of power. See
Figure 71 on page 99 for an example of redundant power connections.

Do not overload the circuits that power your storage subsystem and

Note:

storage expansion enclosures. Use additional pairs of power distribution
units (PDUs) if necessary. Refer to the Installation, User’s, and
Maintenance Guide for your storage expansion enclosures for information
on storage expansion enclosure power requirements. Contact your IBM
service representative for additional information if needed.

v Before any planned system shutdown or after any system additions, removals, or

modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), save the storage
subsystem profile as explained in the DS4000 Storage Manager guide for your
operating system. Save the profile in a location other than in the logical drives
created for the DS4800.

v During any maintenance or attended power-up procedure, carefully follow the

power-up sequence listed in “Turning on the storage subsystem” on page 105.
Check that each component of the subsystem is powered-on in the proper order
during this entire power-up procedure to ensure the controller will be able to
optimally access all of your storage subsystems.

6 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

v The storage subsystem supports simultaneous power-up to the system

components; however, you should always follow the power-up sequence listed in
“Turning on the storage subsystem” on page 105 during any attended power-up
procedure.

v A storage system in an optimal state should recover automatically from an

unexpected shutdown and unattended simultaneous restoration of power to
system components. After power is restored, call IBM support if any of the
following conditions occur:

– The storage subsystem logical drives and arrays are not displayed in the

DS4000 Storage Manager graphical user interface (GUI).

– The storage subsystem logical drives and arrays do not come online.

– The storage subsystem logical drives and arrays seem to be degraded.

Storage server components

The DS4800 directs and manages the I/O activity between a host and the drives in
a RAID array. The storage subsystem has eight single-ported host channels (four
per controller) and can support up to 256 hosts with two FC connections to the
DS4800 (one to controller A and one to controller B for redundancy). The storage
subsystem has four dual-ported drive channels and can support up to 224 fibre
channel or SATA drives with a maximum of 2048 addressable logical drives.

Note: The DS4800 model 80A/H subsystem support the attachment of up to 112

drives only as standard. An additional entitlement must be purchased to
allow the attachment of up to 224 drives to the DS4800 model 80A/H

subsystem.
The DS4800 has Intel® Pentium® processors and RAID controllers with either 2, 4
or 8 GB of cache random access memory (RAM) (depending on the DS4800
model). Its host-side and drive-side fibre channel port can support fibre channel
speeds of up to 4 Gb/s. Figure 1 on page 8 shows the DS4800 with front bezel in
place.

Chapter 1. Introduction 7

ds48008

Figure 1. DS4800 Storage Subsystem

The storage subsystem comprises five components. The components, and the
quantity of each component in the storage subsystem, are the following:

v RAID controllers (two)

v Power supply-fans (two)

v Interconnect-battery unit (one)

power supply and fan unit and interconnect-battery unit are located behind the

The
front bezel. The controllers are located in the rear of the storage subsystem. All
components are secured in the storage subsystem by quick release latches,
enabling each component to be removed by disengaging the latch and sliding the
component from the storage subsystem chassis. Figure 2 on page 9 shows the
positions of the components in the DS4800.

All DS4800 models support hot-swap RAID controllers, power supply and fan units,
cache-protected batteries, and interconnect-battery units, so you can remove and
replace these components without turning off the storage subsystem.
Hot-swappable devices enable you to maintain the availability of your system while
you remove, install, or replace a hot-swap device.

Attention

Refer to the component replacement sections in Chapter 5, “Replacing
components,” on page 141, or refer to the DS4000 Storage Manager
Recovery Guru, for instructions and prerequisites before performing any CRU
replacements. Failure to meet prerequisites or follow replacement instructions
might result in a loss of data access.

8 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Powe r

Powe r

Powe r
supply-fan

supply-fan

supply-fan

Interconnect­battery

Powe r

Powe r

Powe r
supply-fan

supply-fan

supply-fan

RAID controllers

ds48013

Figure 2. Location of components in the storage subsystem

The storage subsystem provides flexibility in configuring a RAID array. (The
DS4800 disk capacity is scalable from 36 GB to over 89 TB.) A minimal storage
subsystem configuration would consist of one DS4800 and one DS4000 storage
expansion enclosure. The storage expansion enclosure can contain as few as two
disk drives. The maximum number of disk drives a DS4800 can support is 224
drives. The maximum number of storage expansion enclosures that can be
attached to the DS4800 varies depending on the type of the attached DS4000
storage expansion enclosures and whether there is a mix of different types of
DS4000 storage expansion enclosures. Currently, the DS4800 storage subsystem
models 80A/H, 82A/H, 84A/H and 88A/H support the following DS4000 storage
expansion enclosures:

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v EXP100

v EXP710

v EXP810

Table 4 for the maximum number of storage expansion enclosures that can be

See
attached to the DS4800 storage subsystem by storage expansion enclosure type.

Table 4. Maximum number of storage expansion enclosures

Enclosure type

Maximum number of
enclosures in a redundant
DS4800 drive channel pair

Maximum number of
enclosures in a DS4800
subsystem

EXP100 8 16

EXP710 8 16

EXP710 and EXP100 8 16

EXP810 7 14

EXP710 and EXP810 7 14 (or 15)

EXP100 and EXP810 7 14 (or 15)

1

The value 15 assumed that one of the redundant DS4800 drive channel pairs must have

1

1

only EXP710 or only EXP100 enclosures attached.

Chapter 1. Introduction 9

Notes:

1. Important: DS4000 EXP700s are not supported by the DS4800 unless they

have been upgraded (with the DS4000 EXP700 Models 1RU/1RX
Switched-ESM Option Upgrade Kit) to have the same internal switched
capabilities as the DS4000 EXP710.

2. The DS4800 does not support the attachment of storage expansion enclosures
operating at 1 Gbps, such as the EXP500.

Intermixing storage expansion enclosures in the same drive loop

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You can intermix EXP810s, EXP710s, and EXP100s. When intermixing EXP810s
with EXP710s or EXP100s in the same drive loop, the Link Rate switch for all
storage expansion enclosures in the intermixed drive loop must be 2 Gbps because
the EXP710 and EXP100 only operate at 2 Gbps.

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There are maximum limits to the number of fibre channel hard drives that you can
configure in redundant drive channel pairs. The maximum number of drives dictates
a fixed number of supported EXP710 or EXP100 and EXP810 drive enclosure
combinations.

Table 5 lists the numbers of 14-drive and 16-drive storage expansion enclosures
you can combine for use in a single redundant drive channel/loop pair in a DS4800
configuration. Table 5 shows the supported storage expansion enclosures
combinations per redundant drive channel/loop pair in a DS4800 configuration. The
table assumes that a DS4800 storage subsystem is generally capable of addressing
the maximum of 112 fibre channel hard drives for each redundant drive
channel/loop pair.

Table 5. Possible combinations of 14-drive and 16-drive storage expansion enclosures per
redundant drive/channel loop pair in a DS4800 configuration

Total number

Number of
Number of
EXP810s
(16
drives/unit)

0 0 7 98 16 = 114

1 16 5 70 16 = 102

2 32 4 56 16 = 104

3 48 3 42 16 = 106

4 64 2 28 16 = 108

5 80 1 14 16 = 110

6 96 0 0 16 = 112

Total
number of
drives in
EXP810s

EXP710/

EXP100s

(14

drives/unit)

Total
number of
drives in
EXP710/
EXP100s

Total
number of
drives in
the DS4800

of drives in a
mixed
EXP710s and
EXP810s drive
loop

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For more information about intermixing storage expansion enclosures and the most
current information on the DS4000 Fibre Channel and Serial ATA (FC/SATA)
Enclosure Intermix premium feature, see the following Web site:

www-1.ibm.com/support/docview.wss?rs=1100&uid=psg1MIGR-57823

Controllers

The DS4800 has two RAID controllers. Both controllers are identical and
interchangeable. The controllers install from the rear of the storage subsystem. The

10 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

upper controller is controller A; the lower controller is controller B. All connections to
the hosts and the drives in the storage configuration are through the controllers.
Figure 3 shows the controllers in the DS4800.

Note: Although both RAID controller units (A and B) in the DS4800 are identical,

they are seated in the DS4800 chassis in opposite orientations. As shown in
Figure 3, the controller units must be inserted in the DS4800 so that the
latches of each controller are on the exterior of the DS4800 chassis. The
latches on controller A line up with the top side of the DS4800 chassis; the
latches on controller B line up with the bottom side of the DS4800 chassis.

Controller A latches

ds48014

Controller A

Controller B latches

Controller B

Figure 3. Controllers in the storage subsystem

Information about the condition of the controllers is conveyed by indicator LEDs on
the back of each controller. (“RAID controller LEDs” on page 120 identifies the
indicator LEDs on the RAID controller and explains the conditions that each LED
indicates.)

Controller cable connections

Each controller provides the following connections:

v Two dual-ported fibre channel drive channels

v Four single-ported host channels

v Two RJ-45 Ethernet ports

v One RS-232 serial port

v AC power

Note: DC power connection is not supported in the current release of the

DS4800. Although a DC power connection is present on the RAID
controller, do not use this connection. Contact IBM for information about
possible future DC power support.

Chapter 1. Introduction 11

Figure 4 identifies the connectors on the back of each controller.

DC
power

AC
power

Strain-relief

clamp

Dual-ported
drive channels

Controller A

Ethernet ports

RS-232
serial port

Host channels

RS-232
serial port

Ethernet ports

Figure 4. Controller connections

Dual-ported drive channels

Each controller has two drive channels; each drive channel has two fibre
channel ports. The drive channels are used to connect storage expansion
enclosures to the RAID controllers on the DS4800.

Note: Other DS4000 product documentation might refer to the drive

channel ports as expansion ports.

Attention:

The DS4800 requires the attachment of at least one DS4000

storage expansion enclosure populated with at least two drives to be
operational. Without being connected to at least one DS4000 storage
expansion enclosure populated with at least two drives, the DS4800
controller will not successfully complete the power-on process.

Controller B

Dual-ported
drive channels

Host channels

Strain-relief

clamp

AC
power

ds48015

DC
power

Two drive channels (one from each controller) are used to form a redundant
drive channel pair. Each drive channel pair supports up to a maximum of
112 drives in seven or eight IBM DS4000 storage expansion enclosures,
depending on the enclosure types. (See Table 4 on page 9 for more
information.)

The drive channel port speeds are auto-negotiated between 2 Gbps and 4
Gbps fibre channel speeds. Both ports of a dual-ported drive channel must
be connected to storage expansion enclosures operating at the same fibre
channel speed. In addition, link-speed negotiation for a given port is limited
to the link speeds supported by the Small Form-factor Pluggable (SFP)
module plugged in that port.

However, if the 2 Gbps and the 4 Gbps DS4000 storage expansion
enclosures are separated into different redundant drive channel pairs, the
DS4800 (1) will support both 2 Gbps and the 4 Gbps DS4000 storage
expansion enclosures at their own fibre channel speed (either 2 Gbps or 4
Gbps). For example, as shown in Figure 5 on page 13, the redundant drive

12 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

channel with EXP810s (4) operates at 4 Gbps, while at the same time the
other redundant drive channel with EXP710s (5) operates at 2 Gbps. This
is possible because all 4 Gbps EXP810s (2) are connected behind a
given redundant drive channel pair, and all 2 Gbps EXP710s (3) are
connected to a different redundant drive channel pair.

85

Controller B

4

1

Controller A

58

5

2

3

Figure 5. DS4800 configuration with 2 Gbps and 4 Gbps enclosures in different drive channel pairs

Host channels

Each DS4800 controller has four single-ported host fibre channel ports. The
controllers perform link speed negotiation on each host channel fibre
channel port (also referred to as auto-negotiation). Each host channel can
operate at either 1, 2, or 4 Gbps fibre channel speeds. The controllers
interact with the fibre channel host bus adapter ports in the host server or
the fibre channel switch to determine the fastest compatible speed between
the controllers and the host or switch. The fastest compatible speed
becomes the operating speed of the link. If the host or switch on the other
end of the link are either fixed-speed or not capable of negotiating, the
controllers automatically detect the operating speed of the other host or
switch and set the controller link speed accordingly. Link speed negotiation
for a given host channel is limited to link speeds supported by the small
form-factor pluggable (SFP) module on that channel.

The controllers will enter into auto-negotiation at these points in time:

v Start-of-day

v Detection of a link-up event after a previous link-down event

ds48060

Chapter 1. Introduction 13

If the auto-negotiation process fails, the controllers will consider the link to
be down until negotiation is again attempted at one of these points in time.

For a 4 Gbps controller, the supported host-channel link speeds are 1, 2,
and 4 Gbps.

Ethernet ports

The Ethernet connections provide for out-of-band management
configurations to a host. The Ethernet ports are used for an RJ-45
10BASE-T or 100BASE-T Ethernet connection to each controller. Use the
Ethernet connection to directly manage the DS4800.

Use one Ethernet port for daily management of the DS4800. Reserve the
other port for use by service personnel or for subsystem monitoring
hardware that may be available in the future.

The two Ethernet ports must be connected into networks with two separate
subnet masks. Otherwise, the following Recovery Guru error will be
generated:

Ethernet Configuration conflict. Both Ethernet ports for a given DS4800
controller have been assigned IP addresses from the same subnet.

You can also make out-of-band management connections to the DS4800
controllers using the default IP addresses. The default IP addresses for the
controller A Ethernet ports 1 and 2 are 192.168.128.101 and

192.168.129.101, respectively. The default IP addresses for the controller B
Ethernet ports 1 and 2 are 192.168.128.102 and 192.168.129.102,
respectively. The default subnet mask for all four Ethernet ports is

255.255.255.0. See “Setting up IP addresses for DS4000 storage
controllers” for more information.

RS-232 serial port

The RS-232 serial connection provides a diagnostic port for use by service
personnel only to perform diagnostic operations on the RAID controllers.

Attention: Incorrect use of the serial port can result in loss of data access

and, in some cases, in loss of data. Do not make any connections to the
serial port unless you do so under the direct guidance of IBM support
personnel.

Note: The maximum baud rate is 115 200 bps. The default baud rate

setting from the factory is 38 400 bps.

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Setting up IP addresses for DS4000 storage controllers

After you install DS4000 Storage Manager (as described in the DS4000 Storage
Manager Installation and Support Guide for your host operating system), complete
one of the following procedures to set up IP addresses:

v “Steps for setting up the DHCP/BOOTP server and network”

v “Steps for assigning static TCP/IP addresses to the DS4000 controllers” on page

15

for setting up the DHCP/BOOTP server and network: To complete this

Steps

procedure, you must have the following components:

v A DHCP or BOOTP server

v A network management station (NMS) for Simple Network Management Protocol

(SNMP) traps

v A host that is connected to a storage subsystem through a fibre-channel I/O path

14 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

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v A management station that is connected by an Ethernet cable to the storage

subsystem controllers

You can avoid DHCP/BOOTP server and network tasks either by using the

Note:

default controller IP addresses, or by assigning static IP addresses to the
controller, as described in the next section.

Complete the following steps to set up the DHCP/BOOTP server and network:

1. Get the MAC address from each controller blade.

2. Complete whichever of the following steps is appropriate for your server:

v On a DHCP server, create a DHCP record for each of the MAC addresses.

Set the lease duration to the longest time possible.

v On a BOOTP server, edit the bootptab file to add in the entries that associate

the MAC address tab with the TCP/IP address.

3. Connect the DS4000 storage subsystem Ethernet ports to the network.

4. Boot the DS4000 storage subsystem.

DHCP server automatically assigns new IP addresses to the controller Ethernet

The
port.

Steps for assigning static TCP/IP addresses to the DS4000 controllers: To

complete this procedure, you must have the following components:

v A host that is connected to a storage subsystem through a fibre-channel I/O path

v A management station that is connected by an Ethernet cable to the storage

subsystem controllers

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Complete
storage subsystem controllers, using default TCP/IP addresses that are assigned to
the DS4000 storage subsystem controllers during manufacturing:

1. Make a direct management connection to the DS4000 storage subsystem, using

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2. Start the DS4000 Storage Manager client software. The Enterprise Management

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3. Add the DS4000 subsystem to the DS4000 Enterprise Management domain

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4. In the Enterprise Management window, click on the name of the default storage

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5. In the Subsystem Management window, right-click the controller icon and select

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6. In the Change Network Configuration window, click on the Controller A and

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7. Close the Subsystem Management window, wait at least five minutes, then

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the following steps to assign static TCP/IP addresses to the DS4000

the default TCP/IP addresses:

v Controller A: 192.168.128.101
v Controller B: 192.168.128.102
v Subnet Mask: 255.255.255.0

For a DS4000 subsystem that has two Ethernet ports per controller, such

Note:

as the DS4200, DS4700 and DS4800, use the Ethernet port that is
labeled #1.

window opens.

using the default IP addresses.

subsystem. The Subsystem Management window opens.

Change —> Network Configuration in the pull-down menu. The Change

Network Configuration window opens.

Controller B tabs and type the new TCP/IP addresses in their appropriate fields.
Click OK.

delete the default DS4000 storage subsystem entry in the Enterprise

Chapter 1. Introduction 15

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Management window. The default DS4000 storage subsystem entry still
displays, but shows an “unresponsive” icon.

8. If applicable, change the IP address of the Ethernet port in the management
station to a value that is on the same TCP/IP subnet as the controller Ethernet
port IP addresses that you just assigned. Exit DS4000 Storage Manager, then
restart.

9. Add a new storage subsystem entry in the Enterprise Management window,
using the new assigned IP addresses.

To manage storage subsystems through a firewall, configure the firewall to

Note:

open port 2463 to TCP data.

Controller memory

Each RAID controller has up to 8 GB of data cache memory, for a total of up to 16
GB cache memory per DS4800. Each RAID controller also has a total of either 512
MB (for models 80A/H, 82A/H or 84A/H) or 1024 MB (for models 88A/H) of Intel
Pentium Xeon processor memory. The processor memory stores the controller
firmware, while the data cache is a buffer used to temporarily store hard disk drive
data during data read and write operations. A Cache Active LED on the controller
turns on when the cache contains data that has not been written to hard disk
drives. The Cache Active LED turns off when the cache does not contain unwritten
data.

Table 6 lists the technical specifications for the RAID controllers.

Table 6. RAID controller specifications

Category Criteria Specification

Memory Cache size 2 GB, 4 GB or 8 GB,

depending on the model

Interface Fibre channel host port 4 fiber-optic ports per

controller

2 Ethernet ports per controller
(for out-of-band management)

Storage Expansion Enclosure
Support

Fibre channel drive expansion
port

Redundant drive channel
pairs

Maximum number of drives
per redundant drive channel
pair

Maximum number of drives
supported by one DS4800

4 fiber-optic ports per
controller

Note: Each DS4800

controller drive channel has
two ports. There are two drive
channels per DS4800
controller.

2 per controller

112 drives per redundant
drive channel pair (either 8
storage expansion enclosures
with 14 drives each or 7
storage expansion enclosures
with 16 drives each). See
Table 4 on page 9.

224 drives (2 redundant drive
channel pairs with 112 drives
in each drive channel pair)

16 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Table 6. RAID controller specifications (continued)

Category Criteria Specification

Data transfer rates Fibre channel host Up to 4 Gb/sec maximum.

Power supply-fans

The DS4800 has two power supply and fan units. Each power supply and fan unit
contains a power supply, a fan, and a battery charger. Each power supply provides
power to the controllers by converting incoming AC voltage to the appropriate DC
voltages. If one power supply and fan unit is turned off or malfunctions, the
remaining power supply and fan unit can maintain electrical power and cooling to
the storage subsystem.

Support 1, 2 and 4 Gbps FC
speeds.

Fibre channel drives Up to 4 Gb/sec maximum

(depends on storage
expansion enclosure speed).
Support 2 and 4 Gbps drives
only. Does not support 1Gbps
drives.

Ethernet 10BASE-T

100BASE-T

Note: Contact IBM for information about possible future DC-to-DC power supply

support.

Install the power supply and fan units from the front of the storage subsystem.
Figure 6 on page 18 shows how a power supply and fan unit slides into the storage
subsystem. The levers that secure the left power supply and fan unit into the
storage subsystem are shown in the released position. The levers that secure the
right power supply and fan unit into the storage subsystem are shown in the latched
position.

Note: Although both power supply and fan units in the DS4800 chassis are

identical, they are seated in the DS4800 chassis in opposite orientations.
The left and right power supply and fan units are installed so that the LED
column of each power supply and fan unit is located towards the interior of
the DS4800, along the side of the interconnect-battery unit.

Chapter 1. Introduction 17

Latch

Levers in
released
position

ds48016

Figure 6. Power supply-fan

Information about the condition of the power supplies, fans, and battery charger is
conveyed by indicator lights (LEDs) on the front of each of the power supply and
fan units and on the interconnect-battery unit. Yo u must remove the front bezel to
see the LEDs. (“Power supply-fan LEDs” on page 125 identifies the indicator LEDs
on a power supply and fan unit and explains the conditions that each LED
indicates.)

Note: The order of the LEDs on the power supply and fan unit is different

depending on whether the power supply and fan unit is installed in the left or
right bay.

In the DS4800 Storage Subsystem, the right power supply and fan unit is linked to
controller A, and the left power supply and fan unit is linked to controller B. To
increase protection against power loss, always make sure that both power supply
and fan units are operational.

Interconnect-battery unit

The interconnect-battery unit is a removable midplane that provides cross-coupled
signal connection between the controllers. The control output from each controller is
connected to the control input in the alternate controller. An audible alarm is
mounted on the interconnect-battery unit display board. A mute switch for the
audible alarm is also mounted on the same board. The interconnect-battery unit
also provides the electrical communication path between the power supply and fan
units and allows their power supplies to load-share and to charge the cache-backup
battery packs. There are two cache-backup battery packs mounted inside the
interconnect-battery unit.

Latch

Power supply­fans

Levers in
latched
position

18 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Attention: Because the interconnect-battery unit provides electrical signal

connections between the controllers, removing the interconnect-battery unit
interrupts the communications between the controller units in the DS4800, resulting
in a loss of communication between controllers A and B. Data access is limited to
only controller A when the interconnect-battery unit is removed. Controller B is in an
offline state while controller A performs all controller operations. To prevent any

problems as a result of this condition, controller B must be placed offline before you
remove the interconnect-battery unit. See “Replacing the interconnect-battery unit”

on page 156 for more information. Failure to observe the instructions and
prerequisites described in “Replacing the interconnect-battery unit” on page 156
might result in a loss of data access.

Figure 7 shows how the interconnect-battery unit slides into the front of the storage
subsystem. The levers securing the interconnect-battery units to the storage
subsystem are shown in the released position.

Interconnect­battery unit

ds48017

Levers
in released
position

Figure 7. Interconnect-battery unit

The interconnect-battery unit contains two battery packs that provide backup power
to the controller cache memory. Each battery pack contains sealed, rechargeable
lithium ion batteries. The battery packs can maintain data in the cache for at least
three days.

The battery chargers in the power supply and fan units perform a battery test when
the storage subsystem is started and on a regularly scheduled interval thereafter.
Data caching is suspended during periods when the controllers performed battery
tests.

The interconnect-battery unit is hot-swappable. You can remove the
interconnect-battery unit for servicing and then reinsert it while the DS4800
continues to perform I/O operations.

Chapter 1. Introduction 19

Attention

Never remove the interconnect-battery unit unless directed to do so by an IBM

support representative. Removing the interconnect-battery unit after a
controller or a power supply and fan unit has already been removed results in
a loss of data access. Refer to “Replacing the interconnect-battery unit” on
page 156 for complete information about the conditions required for safe
removal of the interconnect-battery unit. Do not replace the
interconnect-battery unit without first meeting the requirements described in
“Replacing the interconnect-battery unit” on page 156.

Information about the condition of the interconnect-battery unit is conveyed by

indicator LEDs on the front of interconnect-battery unit. (“Interconnect-battery unit
LEDs” on page 127 identifies the indicator LEDs on the interconnect-battery unit
and explains the conditions that each LED indicates.)

You must remove the front bezel in order to see all of the interconnect-battery unit
LEDs. With the bezel in place, only the following interconnect-battery unit LEDs are
visible:

v Power

v Overall DS4800 Configuration Needs Attention

v Locate/Identify

SFP modules

The displayed order of the Overall DS4800 Configuration Needs Attention

Note:

and Locate/Identify LEDs on the interconnect-battery unit are reversed when
the bezel is removed. See “Front bezel LEDs” on page 11 8 and
“Interconnect-battery unit LEDs” on page 127.

The storage subsystem supports fiber-optic interface cables. A small form-factor
pluggable (SFP) module must be installed in each interface connector on the
controller where a fiber-optic cable is to be installed.

Figure 8 shows an SFP module with fiber-optic cable. Note that the SFP module
shown might look different from those shipped with your unit. The differences do not
affect module performance.

Attention: Currently, the DS4800 supports only short-wave/multimode SFPs. In

DS4800 configurations, you may use long-wave SFPs only in fibre channel switches
that connect DS4800s over long distances. In addition, there are not any visual
markings to identify the maximum operating speeds of the SPFs aside from the
option and FRU part number on the SFP label.

ds48018

SFP Module

Fibre-optic cable

Figure 8. SFP module with fiber-optic cable

20 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Specifications

This section provides site specifications for the DS4800 Storage Subsystem. Before
installing a storage subsystem, you must either verify that your planned installation
site meets these requirements, or prepare the site so that it does meet these
requirements. Preparations might involve meeting area requirements, environmental
requirements, and electrical requirements for DS4800 installation, service, and
operation.

Area requirements

The floor space at the installation site must provide enough strength to support the
weight of the storage subsystem and associated equipment; sufficient space to
install, operate, and service the storage subsystem; and sufficient ventilation to
provide a free flow of air to the unit.

Dimensions

Figure 9 shows the dimensions of the DS4800 Storage Subsystem, which conforms
to the 19-inch rack standard.

17.75 in.

24.25 in.

6.87 in.

ds48007

Figure 9. DS4800 Storage Subsystem dimensions

Weight

The total weight of the storage subsystem depends on the number of components
installed. Table 7 lists the maximum, empty, and shipping weights for the storage
subsystem in different configurations. Table 8 on page 22 lists the weight of each
component.

Table 7. DS4800 Storage Subsystem weights

Weight

Unit

DS4800 Storage

Maximum

1

36.52 kg (80.7 lb) 11.1 kg (24.5 lb) 53.8 kg (118.4 lb)

Empty

2

Shipping

3

Subsystem

Chapter 1. Introduction 21

Table 7. DS4800 Storage Subsystem weights (continued)

Weight

Unit

1

Maximum weight indicates a storage subsystem with two battery modules installed. Each

Maximum

1

Empty

2

Shipping

3

battery module weighs 1.1 kg (2.5 lb).

2

Empty weight indicates a storage subsystem with all components removed.

3

Shipping weight indicates the maximum weight of the storage subsystem and all shipping

material.

Table 8. DS4800 Storage Subsystem component weights

Unit Weight

RAID controller 6.36 kg (14 lb)

Power supply-fan 3.72 kg (8.2 lb)

Interconnect-battery unit 5.36 kg (11.8 lb)

Battery module 1.134 kg (2.5 lb)

Shipping dimensions

Table 9 lists shipping carton dimensions. The height shown includes the height of
the pallet.

Table 9. DS4800 Storage Subsystem shipping carton dimensions

Height Width Depth

44.4 cm (17.5 in.) 62.2 cm (24.5 in.) 78.7 cm (31.0 in.)

Environmental requirements and specifications

This section describes the environmental conditions that are prerequisite to
installing the unit, and heat and sound conditions that are generated by normal
operation of the unit.

Temperature and humidity

Table 10 lists the acceptable temperature and humidity ranges in which the storage
subsystem is designed to operate.

Important: The recommended operating environment air temperature is 22° C (72°

F) or lower.

Table 10. Temperature and humidity requirements

Condition Parameter Requirement

Temperature

1

Operating range 10° - 35° C (50° - 95° F)

Maximum rate of change 10° C (18° F) per hour

Storage range 1° - 60° C (33° - 140° F)

Maximum rate of change 15° C (27° F) per hour

Transit range -40° C to 65° C (-40° F to

Maximum rate of change 20° C (36° F) per hour

149° F)

22 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Table 10. Temperature and humidity requirements (continued)

Condition Parameter Requirement

Relative humidity (no
condensation)

Operating range 20% to 80%

Storage range 10% to 93%

Transit range 5% to 95%

Maximum dew point 26° C (79° F)

Maximum gradient 10% per hour

Notes:

1. The non-operating environment must not exceed the operating environment
limits for longer than 60 days.

2. The storage environment must not exceed the operating environment limits for
longer than 1 year.

3. Substantial deviations from the suggested operating range, in either direction, if
sustained for extended periods of time, will expose the unit to greater risk of
failure from external causes.

Altitude

Table 11 lists the acceptable altitudes for operating, storing, and shipping the
DS4800 Storage Subsystem.

Table 11. DS4800 Storage Subsystem altitude ranges

Environment Altitude

Operating 30.5 m (100 ft.) below sea level to 3048 m

(10,000 ft.) above sea level

Storage 30.5 m (100 ft.) below sea level to 3048 m

(10,000 ft.) above sea level

Transit 30.5 m (100 ft.) below sea level to 12,000 m

(40,000 ft.) above sea level

Airflow and heat dissipation

Figure 10 on page 24 shows the intended airflow for an DS4800 Storage
Subsystem. Allow at least 30 inches in front of the storage subsystem and at least
24 inches behind the storage subsystem for service clearance, proper ventilation,
and heat dissipation.

Chapter 1. Introduction 23

ds48019

Figure 10. DS4800 Storage Subsystem airflow

Table 12 lists the KVA, watts, and Btu calculations for the DS4800 Storage
Subsystem. These values assume the power supplies have a 73 percent efficiency
and a power factor of 0.99. These tabulated power and heat dissipation values are
typical for the storage subsystem. Maximum configuration units are typically
operated at higher data rates, have larger random access memory (RAM)
capacities, or have different host interface boards.

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Table 12. DS4800 Storage Subsystem power and heat dissipation

Parameter KVA Watts (AC) Btu per hour

RAID controller .240 235 803.7

Shock and vibration requirements

Operational shock and operational vibration requirements are shown in this section.

Operational Shock: The DS4800 will be able to withstand the following shock.

Subjecting the equipment to a single shock pulse with the following characteristics
will simulate this level of shock:

v Velocity change = 20 inches per second

v Wave form = Triangular, 10g @3.75 ms

Operational

DS4800 will continue operating when subjected to a random vibration test using the
criteria shown in Table 13 on page 25. This test uses a dwell time of 15 minutes at
any frequency where vigorous or resonant excitation occurs.

Vibration (Random): While in its normal operating position, the

24 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

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Table 13. DS4800 Storage Subsystem operational vibration specifications

Parameter Value

Frequency sweep 5 Hz - 150 Hz - 5 Hz

Wave form Sinusoidal, 0.25 g

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Acoustic noise

Table 14 lists the maximum sound levels emitted by the storage subsystem.

Table 14. DS4800 Storage Subsystem sound levels

Measurement Level

Sound power (normal operation) 6.0 bels

Sound pressure (normal operation) 60 dBA

These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.

Electrical requirements

This section provides information regarding site power and wiring, storage
subsystem AC power requirements, and power cord routing instructions.

Consider the following information when preparing the DS4800 Storage Subsystem
installation site:

v Protective ground – Site wiring must include a protective ground connection to

the AC power source.

Note: Protective ground is also known as safety ground or chassis ground.

v Circuit overloading – Power circuits and associated circuit breakers must provide

sufficient power and overload protection. To prevent possible damage to the unit,
isolate its power source from large switching loads (such as air conditioning
motors, elevator motors, and factory loads).

v Power failures – If a total power failure occurs, the unit automatically performs a

power-up recovery sequence without operator intervention after power is
restored.

Table 15. IBM System Storage DS4800 AC power requirements

Low Range High Range

Nominal Voltage 110 220

Voltage 90 to 132 VAC 198 to 264 VAC

Frequency (Hertz) 50 to 60 Hz 50 to 60 Hz

Minimum Operating Current 3.0 A

Maximum Operating Current 3.0 A

Maximum Surge Current 4.0 A

a

a

a

1.5 A

1.5 A

2.0 A

b

b

b

Chapter 1. Introduction 25

Table 15. IBM System Storage DS4800 AC power requirements (continued)

Low Range High Range

a.

Typical voltage: 120 V AC, 60 Hz, assumes 75% power-supply efficiency and 0.99 power

factor

b.

Typical voltage: 240 V AC, 60 Hz, assumes 75% power-supply efficiency and 0.99 power

factor

Site wiring and power

The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the AC power source. The power supplies
operate within the range of 90 VAC to 264 VAC, at a minimum frequency of 50 Hz
and a maximum frequency of 60 Hz. The power supplies meet standard voltage
requirements for both domestic (inside USA) and international (outside USA)
operation. They use standard industrial wiring with line-to-neutral or line-to-line
power connections.

The agency ratings for the DS4800 Storage Subsystem are 5 amps at 100 VA C
and 2.25 amps at 240 VAC. These are the overall maximum currents for this
system.

AC power recovery

After normal power is restored after a total AC power failure, the DS4800 Storage
Subsystem performs power-up recovery procedures automatically without operator
intervention.

Power cords and receptacles

The DS4800 ships with the line jumper cords used to connect the DS4800 to rack
power distribution units (PDUs). If you need the AC power cords to connect the
DS4800 to wall receptacle outlets, you must purchase the appropriate power cords
for your country or region as described in Appendix D, “Power cords,” on page 193.

26 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Chapter 2. Installing the storage subsystem

This chapter provides the information that you need to install the DS4800 into a
rack cabinet.

Before you begin the installation, review the safety information in “Safety” on page
iii.

Chapter 2, “Installing the storage subsystem” provides an overview of the entire
DS4800 installation process. Read this overview before you begin the installation.

Installation overview

Statement 4:

≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)

CAUTION:
Use safe practices when lifting.

Attention: A fully configured DS4800 weighs 36.52 kg (80.7 lbs). For safety

reasons, the installation instructions in this chapter direct you to remove the
DS4800 components before removing the storage subsystem from the shipping box
and installing it in a rack cabinet.

The following steps summarize the DS4800 installation process. Each step below is
detailed in this chapter or in the next two chapters, Chapter 3, “Cabling the storage
subsystem” and Chapter 4, “Operating the storage subsystem.”

1. Review the preparation recommendations. See “Preparing for installation” on
page 30.

2. Prepare the installation site. See “Preparing the site” on page 32.

3. Prepare the rack cabinet. See “Preparing the rack cabinet” on page 32.

4. Fold down and open the sides of the shipping box. Without removing the
DS4800 from box, you can remove the DS4800 rack mounting rails and
hardware from the box, which is placed on the bottom of the shipping box
underneath the DS4800 enclosure. Install the support rails in the rack cabinet.
See “Installing the support rails” on page 33.

5. Before removing the DS4800 from the shipping box, remove the components
from the DS4800 chassis to lighten the unit. See “Removing the components”
on page 40.

© Copyright IBM Corp. 2006, 2007 27

6. Record the serial number, machine type and model number, and RAID
controller MAC addresses for your DS4800 Storage Subsystem in Appendix B,
“Records,” on page 187.

The serial number, machine type, and model number are located on top of
each the DS4800 subsystem unit. The MAC addresses are located near the
Ethernet ports on each RAID controller, as shown in Figure 103 on page 187.
You may not be able to easily access this information after you install the
DS4800.

7. Install and secure the DS4800 chassis in the rack cabinet. See “Installing the
DS4800 on the support rails” on page 42.

8. Replace the components in the installed DS4800 chassis. See “Replacing the
components” on page 44.

9. Install in the rack cabinet the DS4000 storage expansion enclosure or
enclosures you will cable to the DS4800. Follow the instructions in the
Installation, User’s, and Maintenance Guide for your DS4000 storage
expansion enclosure to set up and mount the storage expansion enclosures.

Attention

Before you power on the DS4800 Storage Subsystem, the DS4800 must
be cabled to at least one storage expansion enclosure populated with at
least two drives. If at least two drives are not installed in each attached
storage expansion enclosure when you power on the DS4800, your
standard storage partition key will be lost and will need to be regenerated
using instructions on the IBM DS4000 Solutions and Premium Features
Web site:

https://www-912.ibm.com/PremiumFeatures/

All drives in the connected storage expansion enclosure or enclosures

must contain no prior configuration data. Additionally, if at least two drives
are not installed in each attached storage expansion enclosure, the
resulting insufficient load to the storage expansion enclosure power
supply CRUs might cause the drive expansion enclosure power supply
CRUs to intermittently appear as failed and then reappear in an optimal
state, falsely indicating that the power supply CRUs are bad.

10. Use SFP modules and fibre channel cables to cable the DS4800 to the
DS4000 storage expansion enclosure or enclosures. See “Connecting storage
expansion enclosures to the DS4800” on page 59.

11. Set the enclosure IDs for all EXP100 and EXP710 storage expansion
enclosures in the configuration to unique values. The EXP810 drive expansion
enclosures automatically adjust the enclosure IDs to ensure unique enclosure
IDs among themselves. See “Storage expansion enclosure settings” on page

85.

12. Perform one of the following cabling tasks to enable management of the
DS4800 configuration:

v If you are using out-of-band management, cable the DS4800 Ethernet ports

to either the management workstation or the host. See “Connecting
secondary interface cables” on page 89.

v If you are using in-band management, cable the DS4800 host channels to

the fibre channel host bus adapters (HBAs) in either the hosts or the fibre
channel switch that connects to the host HBAs. See “Connecting hosts to
the DS4800” on page 87.

28 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

13. Connect the power cables for the DS4800. See “Connecting the power cables”
on page 96.

14. Power on the attached storage expansion enclosures and the DS4800 Storage
Subsystem using the procedure described in “Turning on the storage
subsystem” on page 105.

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15. Install the DS4000 Storage Manager host software on the management
workstation (for out-of-band management) or on the host (for in-band
management). Refer to the IBM System Storage DS4000 Storage Manager

Version 9 Installation and Support Guide for the appropriate operating system

for instructions on how to install the DS4000 Storage Manager host software.

16. Use the DS4000 Storage Manager host software to verify the configuration.

17. Review and perform the procedures described in “Performing the DS4000
Health Check process” on page 102.

Handling static-sensitive devices

Attention: Static electricity can damage electronic devices and your system. To

avoid damage, keep static-sensitive devices in their static-protective packages until
you are ready to install them.

To reduce the possibility of electrostatic discharge (ESD), observe the following
precautions:

v Limit your movement. Movement can cause static electricity to build up around

you.

v Handle the device carefully, holding it by its edges or its frame.

v Do not touch solder joints, pins, or exposed printed circuitry.

v Do not leave the device where others can handle and possibly damage the

device.

v While the device is still in its static-protective package, touch it to an unpainted

metal part of the system unit for at least two seconds. This drains static electricity
from the package and from your body.

v Remove the device from its package and install it directly into your system unit

without setting it down. If it is necessary to set the device down, place it in its
static-protective package. Do not place the device on your system unit cover or
on a metal table. Take additional care when handling devices during cold weather
because heating reduces indoor humidity and increases static electricity.

Heat output, airflow, and cooling

The maximum heat output of the DS4800 is 235 watts (803.7 BTU/hr). Each
DS4800 rack-mounted unit requires an airflow of 2.5 m3 (87 ft.3) per minute. The
input air temperature to all rack cabinets should be in the range 10° C - 35° C (50°
F - 95° F). The recommended operating temperature is 22° C (72° F).

When rack cabinets that contain many DS4800s are to be installed together, the
following requirements must be met to ensure that the DS4800s are adequately
cooled:

v Air enters at the front of the rack cabinet and leaves at the back. To prevent the

air that is leaving the rack cabinet from entering the intake of another piece of
equipment, you must position the rack cabinets in alternate rows, back-to-back
and front-to-front. This arrangement is known as cold aisle/hot aisle and is shown
in Figure 11 on page 30.

Chapter 2. Installing the storage subsystem 29

v Where rack cabinets are in rows, each rack cabinet must touch the rack cabinet

that is next to it. This reduces the amount of hot air that can flow around from the
back of the rack into the intakes of the storage subsystems that are in that rack
cabinet. Yo u should use Suite Attach Kits to completely seal any gaps that
remain between the rack cabinets. For details about Suite Attach Kits, contact
your marketing representative.

v Where rack cabinets are in rows front-to-front or back-to-back, a gap of at least

1220 mm (48 in.) must separate the rows across the cold aisle.

v To ensure correct airflow in each rack cabinet, the rack filler plates must be

installed in unused positions. Also, all the gaps in the front of the rack cabinets
must be sealed, including the gaps between the storage subsystems.

back

T42 racks

1220 mm cold

aisle width

Air

front

Cold aisle

front

T42 racks

back

Perforated tiles

or gratings

center lines of hot

and cold aisle

conditioner

Hot aisle

back

T42 racks

front

Airflow

Figure 11. Example of cold aisle/hot aisle rack cabinet configuration

2440 mm between

f10ug001

Preparing for installation

Before installing the DS4800 Storage Subsystem, create a detailed plan of how this
unit will be used in your storage configuration. The plan should include determining
RAID levels, failover requirements, operating systems to be used, and total storage
capacity requirements.

Complete the following steps to prepare the DS4800 for installation into a rack
cabinet:

1. Prepare the site to meet all area, environmental, power, and site requirements.
For more information, see “Specifications” on page 21.

2. Move the shipping box that contains the DS4800 to the site.

Attention: The DS4800 shipping box weighs up to 53.8 kg (118.4 lb).

30 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Statement 4:

≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)

CAUTION:
Use safe practices when lifting.

3. Remove the mounting rails, mounting hardware, and line jumper cords from the
DS4800 shipping box. Do not remove the DS4800 from the shipping box at this
time.

Attention: The mounting rails, mounting hardware, and line jumper cords may

be packed beneath the DS4800 in the shipping box. To remove these items
from the shipping box without first removing the DS4800, open the two long
sides of the shipping box. Then open and fold flat the two short sides of the
shipping box. This enables you to access the mounting rails, mounting
hardware, and line jumper cords without first removing the DS4800 from the
shipping box.

After you open the DS4800 shipping container and remove the mounting rails,
mounting hardware, and line jumper cords, check the remaining contents (see
“Inventory checklist” on page 3) without removing the DS4800 from the shipping
box. If any items are missing, contact your IBM reseller before proceeding.

4. Assemble the tools and equipment that you will need for installation. These
include the following:

v Region-specific power cords required for the DS4800.

v 5/16 (8 mm) hex nut driver.

v Medium flat-blade screwdriver.

v Antistatic protection (such as a grounding wrist strap).

v Fibre channel and Ethernet interface cables and cable straps.

v SFP modules.

v The line cord jumper power cords that are shipped with the DS4800.

v The rack-mounting hardware that ships with the DS4800.

v The appropriate host software kit for your operating system.

Depending on the DS4800 model you order, your DS4800 will ship with either
the Microsoft Windows host software attachment kit or with your choice of
host software kits (Windows, AIX, Linux, Netware, SUN Solaris, HP-UX, Linux
on POWER, or VMware). The host software kit grants you permission to
attach host servers using the appropriate operating system to the DS4800.

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The kit includes a DS4000 Storage Manager Version 9 Support CD that has
the appropriate IBM DS4000 Storage Manager host software. If you order
more than one host software kit, the additional kits may also be shipped in
the DS4800 shipping box.

Chapter 2. Installing the storage subsystem 31

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Preparing the site

The CD also includes the DS4000 Storage Subsystem controller firmware.
Controller firmware version 6.23.xx.xx or higher, which supports the
attachment of EXP810, is on the DS4000 Storage Manager version 9.23
release 1 CD or can be downloaded from the IBM support Web site for
DS4000 storage products:

www.ibm.com/servers/storage/support/disk/

Depending on your DS4800 model, you may need to purchase the

Note:

appropriate host software kit for your host server operating system.
Contact your IBM representative or reseller for more information.

Continue with “Preparing the site.”

5.

The floor area at the installation site must provide the following conditions:

v Sufficient space to install the DS4800.

v Enough stability to support the weight of the fully configured DS4800 and

associated systems. A fully configured DS4800 weighs 36.52 kg (80.7 lb).

Ensure

that all requirements, such as floor space, air conditioning, and electrical

service, have been met. Other site preparation activities include the following tasks:

v To ensure that there is enough room to move around the cabinet and install

modules, clear space at the installation area.

v Install uninterruptible power supply (UPS) devices.

v If applicable, install host bus adapters (HBAs), switches, or other devices.

v Route interface cables from the hosts or switches to the installation area.

v Route main power cords to the installation area.

information on interface cables and connections, see Chapter 3, “Cabling the

For
storage subsystem,” on page 47.

Continue with “Preparing the rack cabinet.”

Preparing the rack cabinet

Important: Before you install the DS4800 in a rack cabinet, keep in mind the

following considerations:

v Review the documentation that comes with your rack cabinet for safety and

cabling considerations.

v Install the DS4800 in a recommended 22° C (72° F) environment.

v To ensure proper airflow, do not block the air vents; at least 15 cm (6 in.) of air

space is required. Review the important information in “Heat output, airflow, and
cooling” on page 29.

v To ensure rack stability, load the rack cabinet starting at the bottom.

v If you install multiple components in the rack cabinet, do not overload the power

outlets.

v Always connect the storage subsystem to a properly grounded outlet.

v Always connect the IBM-certified rack power distribution units (PDUs) to at least

two independent power circuits or sources.

Complete
DS4800:

1. Move, unpack, and level the rack cabinet at the installation site (if needed).

the following steps to prepare the rack cabinet before you install the

32 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

2. Remove the external rack panels.

3. If necessary, stop all I/O activity to the devices in the rack cabinet.

4. If necessary, turn off all storage expansion enclosure and rack cabinet power.
Disconnect existing power, network, and other external cables.

5. Install any additional interface cables and power cables.

After you have completed these steps, continue with “Installing the support rails.”

Installing the support rails

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Attention: Duplicate copies of the rack mounting templates are provided in

Appendix C, “Rack mounting templates,” on page 189. If you want to tear out the
templates from this document for easier use, use the copies provided in
Appendix C, “Rack mounting templates,” on page 189 instead of the copies in this
section.

Use the following templates and instructions to identify the proper locations for
inserting M5 screws when mounting the support rails and DS4800 to a rack cabinet.
The locations for the M5 screws are highlighted in the templates.

Hold the appropriate template up to each side of the rack cabinet at the 4–U
section where you will install the DS4800. The highlighted squares on each side of
the template mark the positions where you will thread the M5 screws that secure
the rails and the DS4800 to the front and rear of the cabinet.

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The DS4800 is 4 U high. Align the template with the rack at a U boundary. U
boundaries are shown as horizontal dashed lines in the rack mounting templates.

Note: The mounting holes shown in the following rack mounting templates are

square. The holes in your rack might be round, square, or threaded. Use the
washers supplied under the heads of the M5 screws when mounting to racks
with square holes.

Chapter 2. Installing the storage subsystem 33

|

4 U

4 U

DS4800

FRONT

Rack Mounting

Template

3 U 3 U

Rail assembly
(Front left)

2 U

Rail assembly
(Front right)

2 U

1 U1 U

Rail assembly
(Front left)

0 U

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Figure 12. DS4800 front rack mounting template

Rail assembly
(Front right)

ds48020

0 U

|

34 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

4 U

4 U

DS4800

REAR

Rack Mounting

Template

3 U 3 U

2 U

Rail assembly
(Rear left)

0 U

Figure 13. DS4800 rear rack mounting template

Rail assembly
(Rear right)

Printed in the U.S.A

2 U

1 U1 U

ds48021

0 U

Before installing the DS4800 in a rack cabinet, you must install the rails and
rack-mounting hardware that come with your storage subsystem. The DS4800
requires an Electronic Industries Association (EIA) 310-D Type A 19-inch rack
cabinet. The distance between EIA rails, from the front to the rear of the rack
cabinet, is 60.96 cm (24 in.) minimum and 81.28 cm (32 in.) maximum. This rack
cabinet conforms to the EIA standard. Where you place the support rails in the rack
cabinet depends on where you intend to position the storage subsystem.

Figure 14 on page 36 shows the support rail assembly for the DS4800.

Chapter 2. Installing the storage subsystem 35

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Mounting flange

Mounting rails

Mounting flange

Figure 14. DS4800 support rail assembly

Flat head screws

Rear rail hold-down clips
(right clip not shown)

Alignment pins

ds
48
0

09

|

Complete the following steps to install the support rails:

Note: Refer to Figure 14 while performing these steps.

1. Ensure that the rack cabinet has already been installed.

2. Ensure that a stabilizer has been correctly attached to the bottom front of the
rack cabinet to prevent the rack cabinet from tipping forward while the DS4800
is being installed.

Refer to the installation and service guide, or equivalent, for the rack cabinet
as required.

3. If you have not yet done so, remove the mounting rails, mounting hardware,
and line jumper cords from the DS4800 shipping box, which is on the bottom
of the shipping box beneath the DS4800 chassis. Do not remove the DS4800
from the shipping box at this time.

Attention: The mounting rails, mounting hardware, and line jumper cords

may be packed beneath the DS4800 in the shipping box. To remove these
items from the shipping box without first removing the DS4800, open the two
long sides of the shipping box. Then open and fold flat the two short sides of
the shipping box. This enables you to access the mounting rails, mounting
hardware, and line jumper cords without first removing the DS4800 from the
shipping box.

4. Locate the two support rails and six of the eight M5 screws that are supplied
with the DS4800.

5. The rack-mounted unit is four EIA units high. Decide accordingly where you
are going to install the support rails.

Attention: Use the rack mounting templates in this chapter or in Appendix C,

“Rack mounting templates,” on page 189 to locate the proper rack mounting
holes for installing the support rails into the rack cabinet.

Note the following considerations before you choose where to install the rails:

v Plan the installation so that each DS4800 subsystem and its associated

storage expansion enclosures are mounted together in the same rack, or in
adjacent racks if necessary.

v When you install the DS4800 and associated storage expansion enclosures

into a rack cabinet, install each device in the lowest available position and
work upwards so that the rack does not become unstable.

36 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Note: If you are installing more than one DS4800 Storage Subsystem, it is

recommended that you install each DS4800 and its associated
storage expansion enclosures in a separate rack cabinet.

v If appropriate, allow for possible later installation of other units.

v If necessary, remove the rack power distribution units (PDUs) before you

install the support rails.

v For procedures and more information, refer to the installation and service

guide, or equivalent, for the rack cabinet.

6. Starting with the left rail, use a medium flat-blade screwdriver to loosen the two

flat-head rail adjustment screws. See Figure 14 on page 36.

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7. Hold the front of the left rail against the inside of the front rack-mounting
flange, and then extend the rear of the support rail until it makes contact with
the rear rack mounting flange. The alignment pins at the rear of the rail should
slide into the holes at the rear of the rack.

8. From the front of the rack, with the rail mounting flanges inside of the front
rack-mounting flange, use the 5/16 (8 mm) hex nut driver to thread and loosely
tighten the lower M5 screw only. Use the front rack mounting template in this
chapter (or use the copy in Appendix C, “Rack mounting templates,” on page

189) to locate the proper rack mounting hole for installing this screw.

Attention: Do not completely tighten the screw until you have installed the

DS4800 in the rack cabinet.

9. From the rear of the rack, thread and loosely tighten two M5 screws using the
5/16 (8 mm) hex nut driver. Use the rear rack mounting template in this
chapter (or use the copy in Appendix C, “Rack mounting templates,” on page

189) to locate the proper rack mounting holes for installing these screws. Do
not completely tighten the screws until you have installed the DS4800 in the
rack cabinet.

When you are finished installing the left rail, the rail should be attached to the
cabinet using one M5 screw in the front and two M5 screws at the back. All
three M5 screws should be loosely tightened.

10. Repeat step 6 through step 9 for the right rail.

11. Tighten the rail adjustment screws on both rails.

12. Continue with “Installing the DS4800.”

Installing the DS4800

The DS4800 Storage Subsystem contains two controllers, two power supply and
fan units, and one interconnect-battery unit. The RAID controllers are located at the
back of the unit. The two power supply and fan units and the interconnect-battery
unit are located behind the front bezel.

Figure 15 on page 38 shows the front bezel of the DS4800 Storage Subsystem, a
front view without the cover, and a back view. Figure 15 on page 38 also shows the
locations of the components that are referenced during this installation procedure.

Chapter 2. Installing the storage subsystem 37

Power supply-fan

Interconnect-battery unit

Controller A

Front cover

Power supply-fan

Controller B

Figure 15. DS4800 Storage Subsystem front views and back view

Assemble these items before proceeding with the installation.

v Antistatic protection, such as a grounded wrist strap

v Cart or other surface to hold the DS4800 and its components

v Two M5 screws

v Tie wraps or other cable management devices (optional)

Releasing and locking a component lever

Each of the components in the DS4800 Storage Subsystem is held in place by two
locking levers. Each lever engages a pin on the DS4800 Storage Subsystem
enclosure to pull the component securely into the enclosure. Figure 16 on page 39
shows the lever, the latch that locks the lever into position, and the pin. The top
view shows the lever in the closed and locked position. The bottom view shows the
lever in the released position.

ds48023

AC power switch

38 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Pin

Lever

ds48024

Latch

Figure 16. Component lever and latch

In the following sections, you will need to remove and replace each of the
components. Use these steps to release and latch the levers on each component.

To release both latches on a component and remove the component, complete the
following steps:

1. Push the latches to the side until the latches release the levers.

2. Rotate both levers out simultaneously. When the levers are completely free of
the pins, place one hand under the component and use the levers to pull the
component from the DS4800 Storage Subsystem.

See Table 7 on page 21 for a listing of the weights of each DS4800

Note:

Storage Subsystem component.

replace a component and lock the latches, complete the following steps:

To

1. With the levers perpendicular to the face of the component, slide the back of the
component into the appropriate slot.

2. Push the component into the slot and, when the component is almost fully
installed, ensure that the notches in the levers are aligned with the pins on the
enclosure.

Note: Do not force fit. The components are keyed to prevent them from being

inserted into the chassis incorrectly.

3. Holding the levers, press the component fully into the slot, engaging the pins on
the enclosure.

Chapter 2. Installing the storage subsystem 39

4. Hold open both latches and rotate both levers simultaneously to the closed
position. Release the latches. When you release the latches, you should see
both latches slide over the levers, indicating that the component is locked in
place.

Removing the components

This section provides procedures for removing components from the DS4800 before
lifting it from the shipping box and placing the DS4800 in the cabinet. Removing
components from a DS4800 Storage Subsystem makes the storage subsystem
lighter and easier to lift from the shipping box and install in the rack cabinet. Place
the components on a dry, level, and static-free surface to protect them from
electrostatic discharge after you remove them from the DS4800.

Use these instructions after you have completed all applicable site, rack cabinet,
and DS4800 preparations (as discussed in “Preparing for installation” on page 30)
and installed the support rails (as discussed in “Installing the support rails” on page

33).

You will need an antistatic wrist strap and a cart or level surface (to hold the
components). Observe the precautions listed in “Handling static-sensitive devices”
on page 29. In the following procedure, you will remove the following components
from the storage subsystem before you install it in the rack cabinet:

v RAID controllers

v Power supply-fan units

v Interconnect-battery unit

Statement 4:

≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)

CAUTION:
Use safe practices when lifting.

Attention: A fully populated DS4800 Storage Subsystem weighs 36.52 kg (80.7

lb). Do not attempt to lift the DS4800 Storage Subsystem from the shipping box or
install the unit in the rack cabinet unless all of the components have been removed.
If you choose to lift the DS4800 Storage Subsystem from the shipping box or install
the unit in the rack without removing all of the components first, you do so at your
own risk. For more information on the weights of the individual DS4800 Storage
Subsystem components, see “Specifications” on page 21.

40 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Electrostatic discharge can damage sensitive components. Touching the

DS4800 Storage Subsystem or its components without using a proper ground might
damage the equipment. To avoid damage, use proper antistatic protection before
handling any components.

1. Open the two long sides of the shipping box, if you have not done so already.
Opening the long sides of the box to a horizontal position provides access to
the storage subsystem components.

2. Put on antistatic protection, and keep it on while performing all of the remaining
procedures in this section.

3. Remove both power supply and fan units. Figure 17 shows the locations of the
power supply and fan units and the power supply and fan unit levers.

Power supply-fans

Levers in released
position

ds48026

Figure 17. Removing the power supply and fan units

4. Remove the interconnect-battery unit. Figure 18 shows the location of the
interconnect-battery unit and the interconnect-battery unit levers.

Interconnect­battery unit

ds48027

Levers
in released
position

Figure 18. Removing the interconnect-battery unit

Chapter 2. Installing the storage subsystem 41

5. At the back of the DS4800 Storage Subsystem, use an adhesive note to label
each of the controllers. Controller A is in the upper slot; controller B is in the
lower slot. Figure 19 shows the locations of the controllers and controller levers.

RAID
controller A

ds48028

Levers
in released position

RAID
controller B

Figure 19. Removing the controllers

6. Remove the controllers. Figure 19 shows the controller locations and the
controller levers.

7. After you have removed the components, record the serial number, machine
type and model number, and MAC addresses for your DS4800 Storage
Subsystem in Appendix B, “Records,” on page 187. The serial number, machine
type, and model number are located on top of each RAID controller unit. The
MAC addresses are located near the Ethernet ports on each RAID controller, as
shown in Figure 103 on page 187. You may not be able to easily access this
information after you install the DS4800.

8. Go to “Installing the DS4800 on the support rails.”

Installing the DS4800 on the support rails

This section provides instructions on how to install the DS4800 in a rack cabinet.

Attention: If you have not yet done so, record the serial number, machine type

and model number, and MAC addresses for your DS4800 Storage Subsystem in
Appendix B, “Records,” on page 187, as described in step 7.

Use the following procedure to install the DS4800 Storage Subsystem on support
rails in a rack cabinet. To mount a storage subsystem in the rack cabinet, all
support rails must be installed in their correct locations. If you need to install the
rails, see “Installing the support rails” on page 33.

CAUTION:
Never install components or other equipment in the top half of a rackmount
cabinet while the bottom half is empty. Doing so can cause the cabinet to
become top-heavy and to tip over. Always install hardware in the lowest
available position in the cabinet.

42 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Before installing the storage subsystem in the cabinet, ensure that there are no
obstructions, either in the cabinet or outside the cabinet, that would make ready
removal and replacement of any of the components impossible. Check for
obstructions at the front and rear of the cabinet.

Operational Shock

The DS4000 product will be able to withstand a free-fall drop from 0.5
inches onto a hard surface. Subjecting the equipment to a single shock
pulse with the following characteristics will simulate this level of shock:

Velocity change = 20 inches per second ; Wave form = Triangular,25g
@3.75 ms

Operational Vibration (Sweep)

While in its normal operating position, the DS4800 will continue operating
when subjected to the following vibration sweep. The test will include a
dwell time of 15 minutes at any frequency where vigorous or resonant
excitation occurs.

v Frequency sweep = 5 Hz – 150 Hz – 5 Hz

v Wave form = Sinusoidal, 0.25g

Attention: If you have removed the components from the DS4800, you should be

able to lift the unit from the shipping box and into the cabinet with the help of one
other person. (If you have not removed the components before the installation, you
should have at least two other people available to help you lift the unit from the
shipping box and into the rack cabinet.) For safety reasons, IBM does not
recommend moving the DS4800 Storage Subsystem from the shipping box and
installing the DS4800 on the support rails without first removing all CRU
components.

1. Remove the empty DS4800 Storage Subsystem from the shipping box and set
the storage subsystem in the cabinet. Figure 20 on page 44 shows the correct
orientation of the empty storage subsystem to the cabinet and support rail.

The following steps will help you safely install the DS4800 on the support rails:

a. If you have installed a screw in the upper mounting hole at the front of each

support rail, remove the upper screws. These two screws are used later to
secure the front of the storage subsystem to the rack.

b. Move the empty storage subsystem from the shipping box and to the front of

the cabinet.

c. With help from another person, place the back of the storage subsystem on

the support rails, and then slide the storage subsystem into the cabinet.

Attention: When you slide the storage subsystem into the cabinet, verify

that the back of the DS4800 Storage Subsystem is secured by the
hold-down clips located at the back of each rail. With the M5 rail screws
loosely threaded, you can make minor adjustments to the rails to ensure that
the subsystem latches in the hold-down clips. The hold-down clips are
shown in Figure 14 on page 36.

Chapter 2. Installing the storage subsystem 43

ds48029

Screw

Figure 20. Securing the DS4800 to the rack cabinet

2. Secure the storage subsystem to the cabinet. Figure 20 shows how to secure
the DS4800 to the vertical members of the cabinet.

The following steps will help you safely secure the DS4800 in the rack cabinet:

a. Align the front mounting holes on the storage subsystem flanges with the

mounting holes on the cabinet.

b. Using the 5/16 (8 mm) hex nut driver, insert one M5 screw into the hole on

each flange, and tighten the screws completely to secure the front of the
storage subsystem to the cabinet.

At the front and the rear of the rack cabinet, use the 5/16 (8 mm) hex nut driver

3.
to finish tightening the other three M5 screws for each rail.

4. Continue with “Replacing the components.”

Replacing the components

Complete the following procedure to replace the components in the storage
subsystem:

1. Replace the power supply and fan units. Figure 21 on page 45 shows the
locations and correct orientation of the power supply and fan units and the
power supply and fan unit levers. The power supply and fan units are keyed to
always fit into the enclosure in the proper orientation. When the component is
oriented correctly, a relief along one edge of each component aligns with a
ledge in the enclosure. Before installing the component, turn the component so
that the indicator LEDs are near the center of the storage subsystem.

Mounting hole

Support rail

44 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Power supply-fan

Levers in
released
position

ds48030

Indicator LEDs

Figure 21. Replacing the power supply and fan units

2. Replace the interconnect-battery unit. Figure 22 shows the location of the
interconnect-battery unit and the interconnect-battery unit levers.

The interconnect-battery unit is keyed to always fit into the enclosure in the
proper orientation. A large pin located on the back of the component prevents
the component from being installed incorrectly. Before installing the component,
turn the component so that the LEDs are near the top of the component.

Interconnect­battery unit

ds48017

Levers
in released
position

Figure 22. Replacing the interconnect-battery unit

3. Replace the controllers at the back of the DS4800. Figure 23 on page 46 shows
the location of the controllers and the controller levers. Ensure that controller A
is returned to the upper slot and that controller B is returned to the lower slot.

Controller B is installed in an orientation that is rotated 180 degrees from

Note:

that of controller A.

Chapter 2. Installing the storage subsystem 45

RAID
controller A

ds48028

Levers
in released position

RAID
controller B

Figure 23. Replacing the controllers

4. Attach the DS4800 front bezel. Install the front bezel by aligning the pins on the
storage subsystem chassis with the spring-steel retainers on the cover, and then
press the cover toward the chassis until the pins snap into place. Figure 24
shows how to install the front bezel in the storage subsystem.

Figure 24. Removing the front bezel

5. Continue with Chapter 3, “Cabling the storage subsystem,” on page 47.

46 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

ds48025

Chapter 3. Cabling the storage subsystem

After the storage subsystem is installed in its permanent location, you must cable it
to hosts, drives, and other external devices, depending on your hardware
configuration. This chapter provides fibre channel and power cabling information for
the storage subsystem. It also provides information about configuring the storage
subsystem.

This chapter addresses the following cabling and configuration topics:

v “Working with SFPs and fiber-optic cables”

v “Connecting storage expansion enclosures to the DS4800” on page 59

v “Connecting hosts to the DS4800” on page 87

v “Connecting secondary interface cables” on page 89

v “Configuring the storage subsystem” on page 90

v “Installing the storage subsystem configuration” on page 96

v “Connecting the power cables” on page 96

Working with SFPs and fiber-optic cables

Each RAID controller has four single-ported host channel connections and two
dual-ported drive channel connections. Yo u use a small-form factor pluggable
transceiver (SFP) to connect each host channel port and drive channel port to hosts
and storage expansion enclosures. The SFP is inserted into the port, and then a
fiber-optic cable is inserted into the SFP. The other end of the fiber-optic cable
connects to an external device. SFPs are laser products.

Statement 3

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:

v Do not remove the covers. Removing the covers of the laser product could result in

exposure to hazardous laser radiation. There are no serviceable parts inside the
device.

v Use of controls or adjustments or performance of procedures other than those

specified herein might result in hazardous radiation exposure.

Danger

Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the
following.

Laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.

© Copyright IBM Corp. 2006, 2007 47

Handling fiber-optic cables

Before you use fiber-optic cables, read the following precautions.

Attention: To avoid damage to the fiber-optic cables, follow these guidelines:

v Do not route the cable along a folding cable-management arm.

v When attaching to a device on slide rails, leave enough slack in the cable so that

it does not bend to a radius of less than 38 mm (1.5 in.) when extended or
become pinched when retracted.

v Route the cable away from places where it can be snagged by other devices in

the rack cabinet.

v Do not overtighten the cable straps or bend the cables to a radius of less than 38

mm (1.5 in.).

v Do not put excess weight on the cable at the connection point. Be sure that the

cable is well supported.

Installing SFP modules

The DS4800 host and drive channel ports require SFP modules. SFP modules are
used to convert electrical signals to optical signals that are required for fibre
channel transmission to and from RAID controllers. The DS4800 supports two types
of SFP modules: one with a plastic latch and one with a wire latch. After you install
the SFP modules, you use fiber-optic cables to connect the DS4800 to other fibre
channel devices.

Before you install SFP modules and fiber-optic cables, read the following
information:

v Use only short-wave/multimode SFPs in DS4800 host or drive ports. In DS4800

configurations, you may use long-wave SFPs only in fibre channel switches that
connect DS4800s over long distances.

v The SFP module housing has an integral guide key designed to prevent you from

inserting the SFP module improperly.

v Use minimal pressure when you insert the SFP module into a port. Forcing the

SFP module into a port could cause damage to the SFP module or the port.

v Yo u can insert or remove the SFP module while the port is powered on.

v The operational loop performance is not affected when you install or remove an

SFP module.

v Yo u must insert the SFP module into a port before you connect the fiber-optic

cable.

v Yo u must remove the fiber-optic cable from the SFP module before you remove

the SFP module from the fibre channel port. See “Removing SFP modules” on
page 50 for more information.

v The speed of the SFP module determines the maximum operating speed of the

fibre channel port in which the SFP is installed. For example, a 2 Gbps SFP that
is plugged into a 4 Gbps-capable port will limit the speed of that port to a
maximum of 2 Gbps.

v The only label that identifies whether an SFP module can be operated at 2 Gbps

only, or at both 2 Gbps and 4 Gbps, is the SFP part number that is printed on the
manufacturing label attached to the SFP. Verify that you use SFPs with the
correct speed requirements in your environment.

48 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Note: You can also use the management software for the DS4800 Storage

Subsystem or the fibre channel switches to display the properties of the
SFPs used in your configurations.

install an SFP module, complete the following steps.

To

Statement 3:

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber-optic devices, or
transmitters) are installed, note the following:

v Do not remove the covers. Removing the covers of the laser product could

result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.

v Use of controls or adjustments or performance of procedures other than

those specified herein might result in hazardous radiation exposure.

DANGER

laser products contain an embedded Class 3A or Class 3B laser

Some
diode. Note the following.

Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.

Attention: When you handle static-sensitive devices, take precautions to avoid

damage from static electricity. For details about handling static-sensitive devices,
see “Handling static-sensitive devices” on page 29.

1. Remove the SFP module from its static-protective package.

2. Remove the protective cap from the SFP module, as shown in Figure 25. Save
the protective cap for future use.

Plastic tab

Protective cap

SFP module

F10ug014

Figure 25. Small Form-Factor Pluggable (SFP) module

Chapter 3. Cabling the storage subsystem 49

3. Remove the protective cap from the fibre channel port. Save the protective cap
for future use.

4. Insert the SFP module into the fibre channel port until it clicks into place. See
Figure 26.

Note: The alignment of the fibre channel ports on controller A are opposite

those of controller B. Before inserting an SFP module into a port, verify
that the SFP module is rotated correctly to match the alignment of the
port on the RAID controller. Do not force-fit. For fibre channel ports in
controller A, SFPs should be inserted with the exposed printed circuit
facing up (as shown in Figure 26). For fibre channel ports in controller B,
SFPs should be inserted with the exposed printed circuit facing down.

Figure 26. Replacing an SFP module

5. Connect a fibre channel cable.

Removing SFP modules

To remove the SFP module from the fibre channel port, perform the following steps.

Attention: To avoid damage to the cable or to the SFP module, make sure you

unplug the LC-LC fibre channel cable before you remove the SFP module.

1. Remove the LC-LC fibre channel cable from the SFP module. For more
information, see “Handling fiber-optic cables” on page 48.

2. Unlock the SFP module latch:

v For SFP modules that contain plastic tabs, unlock the SFP module latch by

pulling the plastic tab outward 10°, as shown in Figure 27 on page 51.

ds48031

50 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Plastic tab

Protective cap

o

10

SFP module

F10ug009

Figure 27. Unlocking the SFP module latch - plastic variety

v For SFP modules that contain wire tabs, unlock the SFP module latch by

pulling the wire latch outward 90°, as shown in Figure 28.

Wire tab

Protective cap

o

90

SFP module

F10ug010

Figure 28. Unlocking the SFP module latch - wire variety

3. With the SFP latch in the unlocked position, extract the SFP module.

v For SFP modules that contain plastic tabs, slide the SFP module out of the

port.

v For SFP modules that contain wire tabs, grasp the wire latch and pull the

SFP module out of the port.

Replace the protective cap on the SFP module.

4.

5. Place the SFP module into a static-protective package.

6. Replace the protective cap on the port.

Installing fiber-optic cables

To connect the fiber-optic cables, perform the following steps.

1. Remove the protective cap from the fiber-optic cable. See Figure 29 on page

52.

Chapter 3. Cabling the storage subsystem 51

Fiber-optic
cable

Protective cap

F10ug011

Figure 29. Removing caps from fiber-optic cables

2. Connect the fiber-optic cable to the installed SFP, as shown in Figure 30.

Figure 30. Connecting fiber-optic cable to SFP

3. Check the LEDs on the RAID controller. When the RAID controller is operating
properly, the amber Needs Attention LED is off. For information about the status
of the RAID controller LEDs, see “RAID controller LEDs” on page 120.

4. To remove the fiber-optic cables, gently pull the fiber-optic cable from the SFP;
then replace the protective caps.

Using LC-LC fibre-channel cables

The LC-LC fibre-channel cable is a fiber-optic cable that you use to connect
DS4800 fibre channel ports to one of the following devices:

v An SFP module installed in a fibre channel switch port

v An SFP module of the host bus adapter port

v An SFP module installed in an IBM DS4000 storage expansion enclosure

ds48031

52 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

See Figure 31 for an illustration of the LC-LC fibre-channel cable.

For more information about cabling these devices, see the documentation that
comes with the LC-LC fibre-channel cable.

fg0ug019

Figure 31. LC-LC fibre-channel cable

Note: If you are connecting the DS4800 Storage Subsystem host ports to a 1 Gbps

device (such as a 1 Gbps fibre channel switch), you must also use an
LC-SC fibre-channel cable adapter. For more information about using an
LC-SC fibre-channel cable adapter, see “Using LC-SC fibre-channel cable
adapters” on page 55.

Connecting an LC-LC cable to an SFP module

Complete the following steps to connect an LC-LC fibre-channel cable to an SFP
module:

Statement 3:

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:

v Do not remove the covers. Removing the covers of the laser product could

result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.

v Use of controls or adjustments or performance of procedures other than

those specified herein might result in hazardous radiation exposure.

Chapter 3. Cabling the storage subsystem 53

DANGER

laser products contain an embedded Class 3A or Class 3B laser

Some
diode. Note the following.

Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.

1. Read the information in “Handling fiber-optic cables” on page 48.

2. If necessary, remove the protective cap from the SFP module, as shown in
Figure 32. Save the protective cap for future use.

3. Remove the two protective caps from one end of the LC-LC cable, as shown in
Figure 32. Save the protective caps for future use.

Fiber-optic
cable

Protective cap

F10ug011

Figure 32. Removing fiber-optic cable protective caps

4. Carefully insert this end of the LC-LC cable into an SFP module that is installed
in the DS4800. The cable connector is keyed to ensure it is inserted into the
SFP module correctly. Holding the connector, push in the cable until it clicks into
place, as shown in Figure 33.

F10ug016

Figure 33. Inserting an LC-LC fibre-channel cable into an SFP module

5. Remove the two protective caps from the other end of the LC-LC cable. Save
the protective caps for future use.

6. Connect this end of the LC-LC cable to the SFP module that is installed in one
of the following devices.

54 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

v DS4000 storage expansion enclosure

v Fibre channel switch

v Host bus adapter

Removing an LC-LC fibre-channel cable

Attention: To avoid damaging the LC-LC cable or SFP module, make sure that

you observe the following precautions.

v Press and hold the lever to release the latches before you remove the cable from

the SFP module.

v Ensure that the levers are in the released position when you remove the cable.

v Do not grasp the SFP module plastic tab when you remove the cable.

Complete

the following steps to remove an LC-LC fibre-channel cable:

1. On the end of the LC-LC cable that connects into the SFP module or host bus
adapter, press down and hold the lever to release the latches, as shown in
Figure 34.

Lever

Latches

f10ug018

Figure 34. LC-LC fibre-channel cable lever and latches

2. Carefully pull on the connector to remove the cable from the SFP module, as
shown in Figure 35.

f10ug017

Figure 35. Removing the LC-LC fibre-channel cable

3. Replace the protective caps on the cable ends.

4. Replace the protective cap on the SFP module.

Using LC-SC fibre-channel cable adapters

The LC-SC fibre-channel cable adapter is a fiber-optic cable that is used to connect
an LC connector into one of the following devices that require SC connectors:

v 1 Gbps fibre channel switch

Chapter 3. Cabling the storage subsystem 55

v Fibre channel host bus adapter

Attention: The DS4800 does not support the attachment of storage expansion

enclosures that operate at 1 Gbps, such as the EXP500.

For more information about connecting to these devices, see the documentation
that comes with the LC-SC fibre-channel cable adapter.

LC connector

f10ug012

SC connector

Figure 36. LC-SC fibre-channel cable adapter

The following sections provide the procedures for properly connecting and removing
an LC-SC fibre-channel cable.

Connecting an LC-SC cable adapter to a device

Complete the following steps to connect an LC-SC fibre-channel cable adapter to a
device:

Statement 3:

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:

v Do not remove the covers. Removing the covers of the laser product could

result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.

v Use of controls or adjustments or performance of procedures other than

those specified herein might result in hazardous radiation exposure.

56 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

DANGER

laser products contain an embedded Class 3A or Class 3B laser

Some
diode. Note the following.

Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.

1. Read the information in “Handling fiber-optic cables” on page 48.

2. Connect one end of an LC-LC cable to an SFP module in the DS4800. For
instructions, see “Using LC-LC fibre-channel cables” on page 52.

3. Remove the two protective caps from the LC connector end of the LC-SC cable
adapter as shown in Figure 37. Save the protective caps for future use.

f10ug013

Figure 37. Removing the LC-SC cable adapter protective caps

4. Carefully insert the other end of the LC-LC cable into the LC connector end of
the LC-SC cable adapter as shown in Figure 38. Push in the connector until it
clicks into place.

f10ug020

Figure 38. Connecting an LC-LC cable into the LC-SC cable adapter

5. If you are connecting the DS4800 to a 1 Gbps fibre channel switch or fibre
channel host bus adapter, connect the SC connector end of the LC-SC cable
adapter to a Gigabit Interface Converter (GBIC) that is installed in the 1 Gbps
fibre channel switch or fibre channel host bus adapter. For more information
about connecting to these devices, see the documentation that comes with the
device.

Chapter 3. Cabling the storage subsystem 57

Removing an LC-LC cable from an LC-SC cable adapter

Complete the following steps to remove an LC-LC cable from an LC-SC cable
adapter:

Attention: To avoid damaging the LC-LC cable, make sure you press and hold

the lever to release the latches before you remove the cable from an LC-SC cable
adapter. Ensure that both levers are in the released position when removing the
cable. When removing the cable from the SFP module, make sure you do not grasp
the SFP module plastic tab.

1. On the end of the cable that connects into the LC connector end of the LC-SC
cable adapter, press down and hold the lever to release the latches. Figure 39
shows the location of the lever and latches.

Lever

Latches

f10ug018

Figure 39. LC-LC fibre-channel cable lever and latches

2. Carefully pull on the connector to remove it. Make sure you grasp the connector
and not the cable when removing the LC-LC cable from the LC-SC cable
adapter as shown in Figure 40.

f10ug015

Figure 40. Removing the LC-LC fibre-channel cable from an LC-SC fibre-channel cable
adapter

3. Replace the protective caps on the cable ends.

58 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Connecting storage expansion enclosures to the DS4800

Attention

Before you power on the DS4800 Storage Subsystem, the DS4800 must be
cabled to at least one storage expansion enclosure populated with at least two
drives. If at least two drives are not installed in each attached storage
expansion enclosure when you power on the DS4800, your standard storage
partition key will be lost and will need to be regenerated using instructions on
the IBM DS4000 Solutions and Premium Features Web site:

https://www-912.ibm.com/PremiumFeatures/

Additionally, if at least two drives are not installed in each attached storage
expansion enclosure, the resulting insufficient load to the storage expansion
enclosure power supply CRUs might cause the drive expansion enclosure
power supply CRUs to intermittently appear as failed and then reappear in an
optimal state, falsely indicating that the power supply CRUs are bad.

In the initial installation of the DS4800, you can add only new storage expansion

enclosures to the DS4800 Storage Subsystem. This means that there must be no
existing configuration information on the storage expansion enclosures that you
want to install.

If the storage expansion enclosures that you want to install currently contain logical
drives or configured hot spares, and you want them to be part of the DS4800
Storage Subsystem configuration, refer to the IBM System Storage DS4000 Hard
Drive and Storage Expansion Enclosure Installation and Migration Guide. Improper
drive migration might cause loss of configuration and other storage subsystem
problems. Contact your IBM support representative for additional information.

Redundant drive channel pair

For the DS4800, each drive channel (see the Glossary definitions for ″drive
channels″ and ″drive loops″) is associated with two ports, and there are two drive
channels and four associated ports per controller. The total number of drives per
drive channel is 112. One channel from each controller combines to form a pair of
redundant drive channels. See Table 16 on page 68 for channel and port labeling
conventions.

In Figure 41 on page 61 and Figure 42 on page 62, drive channel 1 of controller A
and drive channel 3 of controller B combine to form a DS4800 Storage Subsystem
drive channel pair. If any component of drive channel 1 fails, the RAID controllers
can still access the storage expansion enclosures in drive channel 1 through drive
channel 3. Similarly, drive channel 2 of controller A and drive channel 4 of controller
B combine to form the second of the two DS4800 Storage Subsystem drive channel
pairs. If any component of drive channel 2 fails, the RAID controllers can still
access the storage expansion enclosures in drive channel 2 through drive channel

4.

Figure 41 on page 61 shows the storage expansion enclosures in each drive
channel pairs connected to only one drive port in the two-ported drive channel. For
example, in drive channel pair 1, only port 4 of channel 1 and port 1 of channel 3
are used. Figure 42 on page 62 shows that half of the storage expansion
enclosures in each drive channel pair are connected to the first port of the

Chapter 3. Cabling the storage subsystem 59

dual-ported drive channel. The other half of the enclosures are connected to the
second port of the dual-ported drive channel. For example, in drive channel/loop
pair 1, both ports 4 and 3 of channel 1 and port 1 and 2 of channel 3 are used.

Note: In the following drive cabling figures, the DS4800 graphics are simplified to

show only the drive ports of each controller.

60 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Figure 41. Example 1 of redundant drive channel pairs

Figure 42 on page 62 shows a second example of the drive channel cabling for
redundant drive channel pairs.

Chapter 3. Cabling the storage subsystem 61

Figure 42. Example 2 of redundant drive channel pairs

Overview of steps to connect storage expansion enclosure to a storage subsystem

To connect storage expansion enclosures to the storage subsystem, perform the
following steps:

The following procedures are for cold-case procedures (in which the DS4800

Note:

is powered down when storage expansion enclosures are connected, as in
the case of initial installation). For hot-case procedures (in which the DS4800
is powered on when storage expansion enclosures are connected), refer to
the IBM System Storage DS4000 Hard Drive and Storage Expansion
Enclosure Installation and Migration Guide.

1. Follow the instructions in the Installation, User’s, and Maintenance Guide for
your DS4000 storage expansion enclosure, for setting up and mounting the
storage expansion enclosures.

2. Select a cabling topology appropriate for the number of storage expansion
enclosures you will connect to the DS4800. (You must connect at least one
storage expansion enclosure, populated with at least two drives, before you
power on the DS4800.)

“DS4800 Storage Subsystem drive cabling topologies” on page 69 describes the
recommended schemes for cabling different numbers of storage expansion
enclosures to the DS4800 and to each other (that is, if you are connecting more
than one storage expansion enclosure).

62 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

After you select the cabling topology for your configuration, continue with step 3,
following the cabling diagram for your chosen topology.

3. The following steps describe the cabling sequence for connecting at least two
storage expansion enclosures to a DS4800 using the preferred topologies
identified in “DS4800 Storage Subsystem drive cabling topologies” on page 69.

Note: If you are not using the preferred cabling topology, or if you are only

connecting one storage expansion enclosure to the DS4800, your cabling
sequence will differ from the following steps.

For either EXP100 or EXP710 storage expansion enclosure connections:

Perform the following steps to cable either the EXP710 or EXP100 storage
expansion enclosures to each other and to the DS4800.

Note: If you are intermixing different storage expansion enclosures such as

EXP100s, EXP710s, and EXP810s in a DS4800 configuration, refer to
the intermixing cabling diagrams provided in “DS4800 Storage
Subsystem drive cabling topologies” on page 69.

You can match the connections describing these steps with the cabling diagram

(provided in “DS4800 Storage Subsystem drive cabling topologies” on page 69)
that most closely matches your configuration. Figure 43 shows the name of the
ESM ports in the EXP710 /EXP100 storage expansion enclosures.

Figure 43. EXP710 /EXP100 port labels

a. Starting on the DS4800 controller, connect drive port 4 (drive channel 1) of

controller A to the In port on the left ESM board of the first storage
expansion enclosure in the group. (See callout 1 in Figure 44 on page 64.)

b. From the first storage expansion enclosure that will be cabled together

behind a drive port of a drive channel, connect the Out port on the left ESM
board to the In port on the left ESM board of the second (next) enclosure.
(See callout 2 in Figure 44 on page 64.)

c. From the first storage expansion enclosure, connect the Out port on the right

ESM board to the In port on the right ESM board of the second (next)
enclosure. (See callout 6 in Figure 44 on page 64.)

d. If you are cabling more storage expansion enclosures to this group, repeat

the In port to Out port connections until you reach the last storage
expansion enclosure. (See callouts 3 and 4 for the left ESM connections
and callouts 7 and 8 for the right ESM connections in Figure 44 on page

64.)

Chapter 3. Cabling the storage subsystem 63

Figure 44. Connecting EXP710 or EXP100 enclosures to DS4800

e. On the last storage expansion enclosure in the group, connect the Out port

on the right ESM board to drive port 1 (drive channel 3) of controller B of
the DS4800. (See callout 5 in Figure 44.)

You have now completed the redundant fibre channel cabling of the first group
of storage expansion enclosures to the DS4800, using the first ports of the
dual-ported drive channels 1 and 3.

For EXP810 storage expansion enclosure connections:

Perform the following steps to cable EXP810 storage expansion enclosures to
each other and to the DS4800. You can match the connections described in
these steps with the cabling diagram (provided in “DS4800 Storage Subsystem

64 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

drive cabling topologies” on page 69) that most closely matches your
configuration. Figure 45 shows the name of the ESM ports in the EXP810
storage expansion enclosures.

Figure 45. EXP810 port labels

a. Start with the first storage expansion enclosure from the group of EXP810

drive expansion enclosures that will be cabled together. Connect the 1A port
on the left ESM board to the 1B port on the left ESM board of the second
(next) enclosure. (See callout 2 in Figure 46 on page 66.)

b. On the first storage expansion enclosure from the group of drive expansion

enclosures that will be cabled together, connect the 1B port on the right
ESM board to the 1A port on the right ESM board of the second (next)
enclosure. (See callout 8 in Figure 46 on page 66.)

c. If you are cabling more storage expansion enclosures to this group, repeat

steps 3a and 3b for all enclosures except the final enclosure in the loop,
starting with the second enclosure. (See callouts 3 and 4 for the left ESM
connections and callouts 7 and 6 for the right ESM connections in Figure 46
on page 66.)

Chapter 3. Cabling the storage subsystem 65

Figure 46. Connecting EXP810 enclosures to DS4800

d. Connect drive port 4 (drive channel 1) of controller A to the to the 1B port on

the left ESM board of the first storage expansion enclosure in the group of
drive expansion enclosures. (See callout 1 in Figure 46.)

66 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Important: Always connect the DS4800 controller port to the EXP810 ESM

port label 1B to ensure optimal drive channel performance. Do not connect
the DS4800 controller port to the EXP810 ESM port label 1A.

e. Connect drive port 1 (drive channel 3) of controller B to the port 1B on the

right ESM board of the last storage expansion enclosure in the group of
drive expansion enclosures. (See callout 5 in Figure 46 on page 66.)

Important: Always connect the DS4800 controller port to the EXP810 ESM
port label 1B to ensure optimal drive channel performance.

4. Yo u can repeat steps 3a on page 63 to 3e on page 64 in order to connect other
groups of storage expansion enclosures to the DS4800, using the second ports
of the same dual-ported drive channel pair, and the first and second ports in the
other dual-ported drive channel pair, replacing the DS4800 drive ports
(mentioned in steps 3d on page 63 and 3e on page 64) with the appropriate
drive ports in the drive channels. The DS4800 currently supports a maximum of
112 drives in either eight 14-drive storage expansion enclosures or seven
16-drive storage expansion enclosures per drive channel in each controller. One
drive channel from each of controllers A and B must be connected to the same
set of storage expansion enclosures to provide drive channel redundancy. This
will result in the support of a maximum of 224 drives in 16 or 14 storage
expansion enclosures per DS4800, depending on storage expansion enclosure
type.

5. Set unique enclosure IDs for all storage expansion enclosures that are cabled to
the DS4800 for the EXP710 and EXP100 only. See “DS4000 storage expansion
enclosure ID settings” on page 86, and refer to your storage expansion
enclosure installation manual for details on setting the enclosure ID.

The DS4800 Storage Subsystem locates the drives in the storage expansion
enclosures after you power on the configuration. Always connect power to the
storage expansion enclosures first and then connect power to the DS4800. After
you have powered on the configuration, use the DS4000 Storage Manager client to
check the status of the new drives, correct any errors found, and configure the new
drives.

DS4800 drive cabling rules and recommendations

Refer to these general rules and recommendations when completing the cabling
steps described in this document.

1. Do not connect a combination of more than eight EXP710/EXP100 or seven
EXP810 storage expansion enclosures to the two ports of a dual-ported drive
channel. Failure to observe this limitation might result in loss of data
availability.

2. Do not connect more than four EXP810 storage expansion enclosures to each
port of the dual-ported drive channel. There are no restrictions to four or less
storage expansion enclosures connected per drive port for the EXP710 and
the EXP100 storage expansion enclosures; however, IBM recommends using
the same rule for the EXP710/EXP100 enclosures to maximize drive channel
performance.

As long as there is one EXP810 enclosure behind a controller drive

Note:

port, the maximum number of enclosures that can be connected behind
that controller drive is four.

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3. If there are four or more EXP710s to be connected to a channel, split them
evenly across the two channel ports associated with the channel. If there is an
odd number of EXP710s, then one channel port will have one more EXP710
connected to it than the other channel port.

Chapter 3. Cabling the storage subsystem 67

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4. If there are three or fewer EXP710s to be connected to a channel, then they
should all be daisy-chained together to one channel port on the channel. The
other channel port should be left unconnected.

5. If you are mixing EXP710s and EXP100s, all EXP710s must be grouped
together and all EXP100s must be grouped together.

6. It is recommended that you add storage expansion enclosures to the DS4800
drive ports in a round-robin fashion. For example, if you have four EXP810s to
be cabled to the DS4800, instead of cabling all four EXP810s to one drive port
of a drive channel, distribute the enclosures to all drive ports, which results in
one enclosure per drive port of a drive channel.

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7. Do not connect more than the recommended maximum number of enclosures
per drive channel (eight for 14-drive and seven for 16-drive enclosures). When
mixing 14-drive and 16-drive enclosures, the maximum number of expansion
enclosures is seven per redundant drive channel pair.

8. DS4800 supports storage expansion enclosures operating at different fibre
channel speeds (for example, 2 Gbps or 4 Gbps) only when they are installed
in separate redundant drive channel pairs. DS4800 does not support a mix of
storage expansion enclosures operating at different fibre channel speeds in the
same redundant drive channel pair.

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9. DS4800 supports a mix of EXP100, EXP710, and EXP810 storage expansion
enclosures in the same redundant drive channel pair. If possible, it is
recommended that you cable the storage expansion enclosures of the same
type together to ease maintenance and troubleshooting in the event of failures.
For specific cabling rules and restrictions when intermixing EXP100, EXP710,
and EXP810 storage expansion enclosures, see “One DS4800 to two or more
storage expansion enclosures in a mixed environment” on page 81.

10. The DS4000 controller drive port must always be connected to the EXP810
port labeled 1B. Because the left and right EXP810 ESMs (ESMs A and B) are
inserted in the ESM bays in different orientations, you must look for the port
labeled 1B before making the fibre channel connections.

11. Table 16 indicates a number of ways that four storage expansion enclosures
can be attached to the DS4800 controller drive ports. Case 7 is the
recommended way. Depending on your need and the type of storage
expansion enclosures that you used, you may also choose one of the other
ways described in the table. For example, in a given drive channel, you can
connect three storage expansion enclosures to the first port and five storage
expansion enclosures to the second port, or you can connect four storage
expansion enclosures to the first port and four storage expansion enclosures to
the second port. You cannot connect three storage expansion enclosures to
the first port and six storage expansion enclosures to the second port or one
storage expansion enclosure to the first port and eight storage expansion
enclosures to the second port; in these cases, the total number of storage
expansion enclosures connected to a single drive channel is greater than eight.

Table 16. Different ways to connect four storage expansion enclosures to the DS4800

Drive Channel 1
port 4

Drive Channel 1
port 3

Drive Channel 2
port 2

Case 1 4 0 0 0

Case 2 3 1 0 0

Case 3 0 3 1 0

Case 4 2 2 0 0

Case 5 0 2 2 0

68 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Drive Channel 2
port 1

Table 16. Different ways to connect four storage expansion enclosures to the
DS4800 (continued)

Drive Channel 1
port 4

Drive Channel 1
port 3

Drive Channel 2
port 2

Case 6 1 3 0 0

Case 7 1 1 1 1

DS4800 Storage Subsystem drive cabling topologies

The following sections provide preferred cabling topologies for cabling storage
expansion enclosures to the DS4800 Storage Subsystem. Each example provides
redundant paths to the drives. If one of these examples is suitable for your
hardware and application, complete the cabling connections as described in the
tables. If you have hardware to include in your topology other than what is shown in
these examples, use the examples as a starting point for creating your specific
topology.

Attention: The DS4800 supports the connection of a maximum of eight storage

expansion enclosures per redundant drive channel pair. The DS4800 supports two
redundant drive channel pairs.

Drive Channel 2
port 1

If you are using fiber-optic cables, install SFP modules into the ports that will
receive the cables before installing the cables.

Figure 47 on page 70 shows the locations of controllers A and B, and the
single-ported host channels, Ethernet ports, and dual-ported drive channels at the
back of the DS4800 Storage Subsystem.

Chapter 3. Cabling the storage subsystem 69

Controller A

Host ports

1

2

Controller B

3

4

Ethernet ports

Drive channel 1

Drive ports

1

4

2

Drive channel 3

Drive channel 2

2

3

1

1

2

2

3

4

Drive channel 4

Ethernet ports

1

74120

Drive ports

3

4

1

2

Host ports

ds48034

Figure 47. DS4800 Storage Subsystem ports and controllers

Table 17 provides a list of the drive channels that are associated with each of the
controller drive ports.

Table 17. DS4800 Storage Subsystem drive ports and drive channels

Drive Channel
Number Controller

Drive Port
Numbers

Redundant drive channel
pair

1 A 4 and 3 1

2 A 2 and 1 2

3 B 1 and 2 1

4 B 3 and 4 2

Note: In the following drive cabling figures, the DS4800 graphics are simplified to

show only the drive ports of each controller. In addition, the storage
expansion enclosures are simplified to show only the ESM FC ports. Do not
use these graphics for actual cabling diagrams; instead, use the relevant
instructions found in “Connecting storage expansion enclosures to the
DS4800” on page 59.

One DS4800 and one storage expansion enclosure

If you are cabling one DS4800 Storage Subsystem to one storage expansion
enclosure, Figure 48 on page 71 shows the recommended cabling scheme.

70 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

Figure 48. One DS4800 and one storage expansion enclosure — Recommended cabling

Table 18. Description of Figure 48

Number Description

1 Drive channel 1

3 Drive channel 3

2 Enclosure 1

1. To create drive channel 1, connect drive port 4 of controller A to enclosure 1

(2).

2. To create drive channel 3, connect drive port 1 of controller B to enclosure 1

(2).

One DS4800 and two storage expansion enclosures

If you are cabling one DS4800 Storage Subsystem to two storage expansion
enclosures, Figure 49 on page 72 shows the recommended cabling schemes.

As Figure 49 on page 72 and Figure 50 on page 73 show, when you connect
additional storage expansion enclosures, you can connect them either by using the
additional port of the drive channel or by continuing the connection from the existing
redundant drive channel pair. View 1 is the recommended cabling topology; View 2
is a possible cabling topology, however, it is not recommended.

Chapter 3. Cabling the storage subsystem 71

Figure 49. View 1: One DS4800 and two storage expansion enclosures
cabling—recommended

Table 19. Description of Figure 49

Number Description

1 Drive channel 1

3 Drive channel 3

2 Enclosure 1

4 Enclosure 2

1. To create drive channel 1, connect drive port 4 of controller A to enclosure 1

(2) and drive port 3 to enclosure 2 (4).

2. To create drive channel 3, connect drive port 1 of controller B to enclosure 1

(2) and drive port 2 to enclosure 2 (4).

72 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide