IBM System Storage DCS3700 Installation, User's, And Maintenance Manual

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IBM Sys te m Sto rage DCS3700

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Installation, User, and Maintenance Guide

IBM Sys te m Sto rage DCS3700

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Installation, User, and Maintenance Guide

Note:

Before using this information and the product it supports, be sure to read the general information in the “Safety” on page xi and “Notices” on page 159 sections.

First Edition (May 2011)

Printed in the U.S.A.

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

Contents

Figures ..............vii

Tables ...............ix

Safety ...............xi

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

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

How this document is organized.......xvii

Getting information, help, and service .....xvii

Before you call ...........xviii

Using the documentation ........xviii

Finding Storage Manager software, controller

firmware, and README files.......xviii

IBM System Storage Productivity Center . . . xviii Essential Web sites for DCS3700 support

information .............xix

Software service and support .......xix

Hardware service and support .......xix

Fire suppression systems ........xix

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

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

SAS defined ..............1

Fibre Channel defined ..........2

Operating system support .........2

DCS3700 Features.............3

Inventory checklist ............4

Receiving product updates and support

notifications .............5

Best practices guidelines .........5

DCS3700 components ...........6

Drive drawers .............7

Disk Drive Modules (DDMs) ........8

Controllers ..............9

Controller cable connections .......9

Host ports .............10

Expansion ports ...........10

Ethernet management ports .......10

Serial port .............11

Cache memory ...........11

Cache battery backup module ......11

Environmental Service Modules (ESMs) ....11

Enclosure ID ............12

Power supplies ............13

Fan assemblies ............13

Small Form-Factor Pluggable (SFP) modules . . 15

Software and hardware compatibility and upgrades 15

Software and firmware support code upgrades 15

Determining firmware levels .......16

Specifications ..............17

Area requirements ...........17

Dimensions ............17

Weight ..............17

Shipping dimensions .........18

Environmental requirements and specifications 18

Temperature and humidity .......18

Altitude .............19

Airflow and heat dissipation ......19

Shock and vibration requirements .....19

Acoustic noise ...........20

Electrical requirements .........20

Power and site wiring requirements for models with power supply and fan units . . 21

Heat output, airflow, and cooling ......21

Chapter 2. Installing the DCS3700 . . . 23

Installation overview ...........23

Ordering the lift tool ..........23

World trade locations .........23

United States locations ........24

Installation sequence ..........24

Handling static-sensitive devices .......25

Preparing for installation ..........26

Unpacking the shipping box........26

Inventory list ............28

Tools ..............29

Tools and hardware required .......29

Preparing the site ...........29

Preparing the rack ...........30

Installing the support rails .........30

Installing and removing the handles ......34

Installing the handles ..........34

Removing the handles..........35

Installing the DCS3700 into a rack .......35

Installing the drives ...........37

Chapter 3. Cabling the DCS3700....41

Cabling the DCS3700 Storage System ......41

Controller connectors (with SAS host port

adapters) ..............41

Controller connectors (with Fibre channel host

port adapters) ............42

Enclosure ID Settings ...........42

Working with SAS cables ..........42

Installing SFP modules ..........44

Removing SFP modules ..........46

Handling fibre-optic cables .........47

Using LC-LC Fibre Channel cables ......48

Connecting an LC-LC cable to an SFP module. . 49 Removing an LC-LC Fibre Channel cable . . . 50

Cabling the DCS3700 expansion enclosure ....51

ESM connectors ............51

Connecting the DCS3700 expansion enclosure . . 51

Redundant drive channel pair .......55

Connecting secondary interface cables ....55

Configuring the storage subsystem .....55

Storage subsystem management methods . . 55

Installing the storage subsystem configuration 57

Connecting SAS hosts to the DCS3700 . . . 57 Overview of installing an IBM BladeCenter

configuration to connect to a DCS3700 .....59

Installing the BladeCenter configuration ....59

Connecting BladeCenter hosts to the DCS3700 . . 60 Connecting Fibre Channel hosts to the DCS3700 60

Direct-attached dual-controller connections:. . 61

SAN fabric dual-controller, redundent

connections ............63

Cabling the power supply .........65

Relocating the DCS3700 ..........65

Chapter 4. Operating the DCS3700 storage system and expansion

enclosure .............67

Performing the DCS3700 Health Check process . . 67

Hardware inspection ...........68

Powering on the DCS3700 .........68

Installing the Storage Manager Client......70

Monitoring status through software ......71

Firmware updates ...........72

Troubleshooting the storage subsystem ....72

Checking the LEDs ............73

Front LEDs .............73

Controller LEDs ............74

ESM LEDs..............76

Fan assembly LEDs...........76

AC power-supply LEDs .........77

Drive drawer LEDs...........78

Disk drive LEDs............78

Seven-segment numeric display LEDs ....79

Cache memory and cache battery .......81

Cache memory ............82

Controller cache battery .........82

Cache battery learn cycle .........82

Turning off the storage subsystem .......83

Performing an emergency shutdown ......85

Restoring power after an unexpected shutdown . . 85 Recovering from an overheated power supply. . . 86

Chapter 5. Replacing components . . . 89

Replacing components...........89

Service Action Allowed LED.........89

Working with controllers ..........89

Removing a controller ...........90

Removing and installing a cover .......91

Replacing a controller ...........91

Removing and disposing of the system-board

lithium battery .............95

Installing an optional host interface adapter . . . 96 Removing an optional host interface adapter . . . 99

Working with hot-swap DDMs .......100

Installing hot-swap hard disk drives.....101

Replacing hot-swap hard disk drives ....103

Replacing multiple DDMs ........104

Replacing all DDMs at the same time . . . 105

Replacing the drives one at a time ....107

Replacing an ac power supply........109

Replacing a battery ...........113

Replacing the memory cache DIMM......115

Removing the DIMM ...........116

Installing the DIMM ...........117

Removing and replacing the cache backup flash

memory device .............117

Replacing the bezel ...........118

Working with environmental service modules . . 119

Replacing an ESM ............119

Replacing a fan assembly .........120

Replacing a drive drawer .........122

Chapter 6. Hardware maintenance . . 129

General checkout ............129

Solving problems ............129

Troubleshooting problems in the DCS3700

storage subsystem ...........130

Parts listing ..............136

Appendix A. Records ........139

Identification numbers ..........139

Storage subsystem and controller information

record ................140

Sample information record ........141

Installed device records ..........142

Appendix B. Rack mounting template 143

Appendix C. Specifications for

non-IBM rack installation ......147

General safety requirements for IBM products

installed in a non-IBM rack or cabinet .....147

Rack specifications ...........149

Appendix D. Power cords ......153

Appendix E. Component weights . . . 157

Notices ..............159

Trademarks ..............160

Important notes ............160

Particulate contamination .........161

Documentation format ..........162

Electronic emission notices .........162

Federal Communications Commission (FCC)

Class A Statement ...........162

Industry Canada Class A Emission Compliance

Statement .............162

Avis de conformité à la réglementation

d'Industrie Canada ..........162

Australia and New Zealand Class A Statement 162 United Kingdom telecommunications safety

requirement .............163

European Union EMC Directive Conformance

Statement .............163

Germany Electromagnetic Compatibility

Directive ..............163

Japan VCCI Council Class A Statement ....164

Japan Electronics and Information Technology Industries Association (JEITA) Statement . . . 164

iv IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Korea Communications Commission (KCC)

Class A Statement ...........164

People's Republic of China Class A Electronic

Emission Statement ..........165

Russia Electromagnetic Interference (EMI) Class

A Statement .............165

Taiwan Class A Electronic Emission Statement 165

Taiwan Contact Information ......165

Glossary .............167

Index ...............177

Contents v

vi IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figures

1. Isometric view of the DCS3700 ......7

2. DCS3700 hot-swap drive drawers .....8

3. DCS3700 drive drawer .........8

4. Location of the DCS3700 controllers .....9

5. DCS3700 connectors..........10

6. Cache battery and memory cache DIMM

locations .............11

7. ESM SAS port locations........12

8. Location of seven-segment numeric display on

ESM...............13

9. Power supply components .......13

10. Fan assembly components .......14

11. Storage expansion enclosure airflow ....14

12. SFP module and fibre optic cable .....15

13. DCS3700 airflow ...........19

14. Example of cold aisle/hot aisle rack

configuration ............22

15. Front rack mounting template ......31

16. Rear rack mounting template ......32

17. DCS3700 drive drawer with labeled disk

drives ..............38

18. Dual-controller DS3700 storage subsystem ports and controllers (with an optional SAS

host port adapter) ..........41

19. Dual-controller DS3700 storage subsystem ports and controllers (with an optional Fibre

Channel host port adapter) .......42

20. Mini-SAS cable ...........43

21. Connecting a mini-SAS cable.......43

22. Removing a mini-SAS cable .......44

23. SFP module and protective cap ......45

24. Installing an SFP module into the host port 46

25. Unlocking the SFP module latch - plastic

variety ..............46

26. Unlocking the SFP module latch - wire variety 47

27. Recommended bending and looping

specifications for fibre-optic cables .....48

28. LC-LC Fibre Channel cable .......48

29. Removing fibre-optic cable protective caps 49

30. Inserting an LC-LC Fibre Channel cable into

an SFP module ...........50

31. LC-LC Fibre Channel cable lever and latches 50

32. Removing the LC-LC Fibre Channel cable 51

33. ESM connectors ...........51

34. Single Expansion Enclosures .......53

35. Dual Expansion Enclosures .......54

36. Host-agent (in-band) management .....56

37. Direct (out-of-band) management method 57

38. Dual-controller direct-attached Fibre Channel connection to two HBAs in the same host

(redundant host connection) .......58

39. Dual-controller direct-attached Fibre Channel connections to multiple HBAs in multiple

hosts ...............59

40. Example of DCS3700 connected to a single

BladeCenter unit ...........60

41. Dual-controller direct-attached Fibre Channel connection to two HBAs in the same host

(redundant host connection) .......62

42. Dual-controller direct-attached Fibre Channel connections to multiple HBAs in multiple

hosts ...............62

43. Example of a single Fibre Channel SAN fabric

configuration ............63

44. Example of a dual Fibre Channel SAN fabric

configuration ............64

45. Example of two storage subsystems in a dual

Fibre Channel SAN environment .....64

46. Example of a multiple-host, multiple-port, and multiple-fabric (Fibre Channel and SAS)

configuration ............65

47. Power-supply switches and connectors for

DS3500 dc models ..........69

48. DCS3700 front LEDs and controls .....73

49. DS3524 storage subsystem and EXP3524

storage enclosure front LEDs.......73

50. Controller LEDs ...........74

51. Fibre Channel host port adapter LEDs . . . 75

52. SAS host port adapter LEDs .......75

53. ESM LEDs .............76

54. Fan assembly LEDs ..........77

55. AC power-supply LEDs ........77

56. Drive drawer LEDs ..........78

57. Disk drive LEDs ...........79

58. Numeric display LEDs .........80

59. Removing a controller .........90

60. Removing the cover..........91

61. Removing and replacing a controller ....93

62. Removing the battery unit from the controller 93

63. Cache backup flash memory device location 94

64. Removing a controller .........97

65. Removing the host port adapter filler panel 98

66. Installing a host port adapter ......98

67. Remove controller from the chassis ....99

68. Opening the drive drawer .......102

69. Raising the drive handle ........102

70. Aligning the drive ..........102

71. Locking the drive in place .......103

72. Replacing a power supply .......112

73. Removing a controller.........114

74. Removing a battery unit from the controller 114

75. Memory cache DIMM location ......115

76. Removing a controller.........116

77. Removing the DIMM from the controller 116

78. Installing the DIMM in the controller 117

79. Cache backup flash memory device ....118

80. Removing the bezel .........119

81. Removing an environmental service module 120

82. Removing a fan assembly .......121

83. Rear view of the storage expansion enclosure with the right fan assembly removed . . . 123

84. Vertical mounting bracket that connects to the

midplane .............124

85. Horizontal mounting bracket that connects to

the drive drawer ..........124

86. Drive drawer release lever on the side of the

drive drawer............125

87. Lock-out tumbler located above the drawer

guide ..............126

88. DCS3700 storage subsystem enclosure parts

list ...............137

89. Front rack mounting template ......144

90. Rear rack mounting template ......145

91. Top View of non-IBM Rack Specifications

Dimensions ............149

92. Rack specifications dimensions, top front

view ..............150

93. Rack specifications dimensions, bottom front

view ..............151

viii IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Tables

1. DCS3700 features ...........3

2. Minimum DCS3700 software and firmware

levels ..............15

3. DCS3700 storage expansion enclosure

dimensions.............17

4. DCS3700 weights ..........17

5. DCS3700 component weights ......18

6. DCS3700 shipping carton dimensions ....18

7. Temperature and humidity requirements for storage expansion enclosure when in storage

or in transit ............18

8. DCS3700 altitude ranges ........19

9. DCS3700 power and heat dissipation ....19

10. Random vibration power spectral density 20

11. DCS3700 sound levels .........20

12. DCS3700 ac power requirements .....20

13. Fibre Channel port LEDs ........75

14. Fan assembly LEDs ..........77

15. Drive drawer LEDs ..........78

16. Disk drive LEDs ...........79

17. Drive state indicated by the LEDs .....79

18. Controller numeric display diagnostic codes 80

19. ESM numeric display diagnostic codes . . . 81

20. Drive LED activity ..........100

21. Troubleshooting...........136

22. Parts listing (DCS3700 storage system and

expansion enclosure) .........137

23. Storage subsystem and controller information

record ..............140

24. Sample information record .......141

25. Hard disk drive record ........142

26. IBM power cords ..........153

27. DCS3700 component weights ......157

28. Limits for particulates and gases .....161

x IBM System Storage DCS3700: Installation, User, and Maintenance Guide

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®DCS3700 storage expansion enclosure. 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.

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

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.

5. Turn device ON.

1. Turn everything OFF.

2. First, remove power cords from outlet.

3. Remove signal cables from connectors.

4. Remove all cables from devices.

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.

Statement 3:

CAUTION: When laser products (such as CD-ROMs, DVD drives, fibre 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.

Class 1 Laser statement

Class 1 Laser Product Laser Klasse 1 Laser Klass 1 Luokan 1 Laserlaite Apparell Laser de Calsse 1À

IEC 825-11993 CENELEC EN 60 825

Statement 4:

xii IBM System Storage DCS3700: Installation, User, and Maintenance Guide

≥ 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.

Statement 8:

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.

Safety xiii

Statement 29:

CAUTION: This equipment is designed to permit the connection of the earthed conductor of the dc supply circuit to the earthing conductor at the equipment.

This equipment is designed to permit the connection of the earthed conductor of the dc supply circuit to the earthing conductor at the equipment. If this connection is made, all of the following conditions must be met:

v This equipment shall be connected directly to the dc supply system earthing electrode conductor or

to a bonding jumper from an earthing terminal bar or bus to which the dc supply system earthing electrode conductor is connected.

v This equipment shall be located in the same immediate area (such as, adjacent cabinets) as any

other equipment that has a connection between the earthed conductor of the same dc supply circuit and the earthing conductor, and also the point of earthing of the dc system. The dc system shall not be earthed elsewhere.

v The dc supply source shall be located within the same premises as this equipment.

v Switching or disconnecting devices shall not be in the earthed circuit conductor between the dc

source and the point of connection of the earthing electrode conductor.

Statement 30:

CAUTION: To reduce the risk of electric shock or energy hazards:

v This equipment must be installed by trained service personnel in a restricted-access location, as

defined by the NEC and IEC 60950-1, First Edition, The Standard for Safety of Information Technology Equipment.

v Connect the equipment to a reliably grounded safety extra low voltage (SELV) source. An SELV

source is a secondary circuit that is designed so that normal and single fault conditions do not cause the voltages to exceed a safe level (60 V direct current).

v The branch circuit overcurrent protection must be rated 20 A.

v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not exceeding 4.5 meters in

length.

v Incorporate a readily available approved and rated disconnect device in the field wiring.

CAUTION: This unit has more than one power source. To remove all power from the unit, all dc MAINS must be disconnected.

xiv IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Cable Warning:

WARNING: 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.

Safety xv

xvi IBM System Storage DCS3700: Installation, User, and Maintenance Guide

About this document

This document provides instructions for installing and customizing the configuration of your IBM System Storage DCS3700 Storage Subsystem and the DCS3700 expansion enclosure. It also provides maintenance procedures and troubleshooting information.

Who should read this document

This document is intended for system operators and service technicians who have extensive knowledge of Fibre Channel Serial Attached SCSI (SAS) and network technology.

How this document is organized

Chapter 1, “Introduction,” on page 1 describes the IBM System Storage DCS3700 Storage Subsystem and the DCS3700 expansion enclosure. This chapter includes an inventory checklist and an overview of the storage expansion enclosure features, operating specifications, and components.

Chapter 2, “Installing the DCS3700,” on page 23 contains information on how to install the DCS3700.

Chapter 3, “Cabling the DCS3700,” on page 41 contains information on how to cable the DCS3700.

Chapter 4, “Operating the DCS3700 storage system and expansion enclosure,” on page 67 contains information on how to power on and off the storage expansion enclosure, recover from an overheated power supply, troubleshoot the storage expansion enclosure, and interpret LEDs.

Chapter 5, “Replacing components,” on page 89 contains step-by-step instructions about how to install or remove customer replaceable units (FRUs), such as hard disk drives, power supplies, fan assemblies, environmental service modules (ESMs), drive drawers, and SFP modules.

Chapter 6, “Hardware maintenance,” on page 129 describes problems and symptoms that are specific to your storage expansion enclosure. It also provides a parts list for the DCS3700.

Appendix A, “Records,” on page 139 provides a table that you can use to record and update important information about your DCS3700, including serial number and device records. Whenever you add options to your DCS3700, be sure to update the information in this table.

Appendix B, “Rack mounting template,” on page 143 provides the rack mounting templates for installation of the DCS3700. If you want to tear out the templates from the document for use during installation, use these copies of the templates.

Appendix C, “Specifications for non-IBM rack installation,” on page 147 provides safety requirements and rack specifications for installing DS5000 storage subsystems and DS5000 storage expansion enclosures into non-IBM racks.

Appendix D, “Power cords,” on page 153 lists power cord information for the DCS3700.

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. 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 System Storage Disk

Support Web site pages that are listed in this section.

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

You can solve many problems without outside assistance by following the troubleshooting procedures that IBM provides in the DS 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.

Finding Storage Manager software, controller firmware, and README files

DS Storage Manager software and controller firmware versions are available on the product DVD and can also be downloaded from the Web.

Important: Before you install DS Storage Manager software, consult the README. Updated README

files contain the latest device driver versions, firmware levels, limitations, and other information not found in this document.

Storage Manager README files are found on the Web, at the following address:

http://www.ibm.com/support/entry/portal

To access the documentation related to your storage subsystem, operating system, and DS Storage Manager version from the IBM Support Portal, complete the following steps:

1. Go to http://www.ibm.com/support/entry/portal.

2. Under Choose your products, click Browse for a product or Search for a product.

3. Under Choose your task, click Documentation.

4. Under See your results, click View your page.

5. In the Product documentation box, click the link for the publication that you want to access.

IBM System Storage Productivity Center

The IBM System Storage Productivity Center (SSPC) is an integrated hardware and software solution that provides a single point of entry for managing IBM System Storage, IBM System Storage SAN Volume Controller clusters, and other components of your data storage infrastructure. Therefore, you can use the IBM System Storage Productivity Center to manage multiple IBM System Storage product configurations from a single management interface.

xviii IBM System Storage DCS3700: Installation, User, and Maintenance Guide

To learn how to incorporate the DS Storage Manager with the IBM System Storage Productivity Center, see the IBM System Storage Productivity Center Information Center at the following Web site:

publib.boulder.ibm.com/infocenter/tivihelp/v4r1/index.jsp

Essential Web sites for DCS3700 support information

The most up-to-date information about DCS3700 storage subsystems and DS Storage Manager, including documentation and the most recent software, firmware, and NVSRAM downloads, can be found at the following Web site:

1. Go to http://www.ibm.com/support/entry/portal.

2. Under Choose your products, click Browse for a product or Search for a product.

3. Under Choose your task, click Downloads.

4. Under See your results, click View your page.

5. In the Downloads and fixes, click the link for the download that you want to access.

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.

About this document xix

xx IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Chapter 1. Introduction

This chapter describes the operating specifications, features, and components for the IBM System Storage DCS3700 storage system and DCS3700 expansion unit.

This chapter also includes an inventory checklist and important information on best practices guidelines and product updates for your DCS3700.

Overview

The DCS3700 is designed to meet the storage needs of the highly scalable, data streaming applications in high performance computing environments. The storage subsystem offers you data access and protection to meet your existing high performance computing storage requirements and prepare for the future.

The DCS3700 is designed to provide solutions to meet the needs of midrange storage requirements, delivering high performance, advanced function, high availability, modular and scalable storage capacity, with SAN-attached 6 Gbps Serial Attached SCSI (SAS) and 8 Gbps Fibre Channel (FC) connectivity, and support for RAID levels 0, 1, 3, 5, and 6.

Note:

1. RAID 6 uses a P+Q design implementation.

2. When RAID level 1 is implemented and the number of drives increases to more than two,

RAID level 10 is automatically implemented.

The DCS3700 Storage Subsystem supports attachment of the DCS3700 expansion enclosure. The DCS3700 supports configurations of SAS and Near-Line SAS disks, or a mix of these types of disk drives. For details on the maximum number of disk drives supported, maximum storage capacity, and other features of the storage subsystem, see “DCS3700 Features” on page 3.

The DCS3700 is a 4U rack-mountable storage enclosure that supports up to two redundant, dual-active RAID storage controllers or environmental service modules, depending on the model. The DCS3700 storage system RAID controllers come standard with two 6 Gbps x4 SAS host interface ports and a single 6 Gbps x4 SAS expansion port on the base controller. In addition, each controller has an additional slot that supports the installation of an optional Host Interface Card (HIC). The supported host interface cards are a four-port 8 Gbps Fibre Channel (FC) adapter or a two-port 6 Gbps SAS adapter. Either host interface card can be used in conjunction with the base SAS host interface; however, each controller must have the same type of host interface card installed.

Advanced DCS3700 storage management, copy service options, and optional advanced disaster recovery functions are available, including FlashCopy Storage Manager client is also available for the DSC3700 Storage Subsystem. This storage management software is designed to help centralize storage management, help simplify partitioning of the DCS3700 series storage into as many as 128 virtual servers, and strategically allocate storage capacity to maximize storage space.

, VolumeCopy, and Enhanced Remote Mirroring. The DS

SAS defined

The Serial Attached SCSI (SAS) is a point-to-point serial architecture that replaces the parallel SCSI bus technology but still retains usage of the standard SCSI command set. The SAS point-to-point architecture provides a dedicated, full-duplex channel, that can transfer data at 6 Gbps in each direction. The Serial SCSI Protocol (SSP) is used to support SAS-only drives.

Nearline SAS or NL-SAS drives are enterprise SATA drives that offer a native SAS interface. NL-SAS drives support dual I/O ports allowing for redundant data paths, a faster interface compared to SATA and the ability to support the SCSI command set.

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 devices can be supported, compared to 15 small computer system interface (SCSI) devices.

Operating system support

For supported operating systems, see the latest System README file and the IBM DCS3700 product at the following Web site for additional host operating system support:

www.ibm.com/systems/support/storage/config/ssic/index.jsp

See “Finding Storage Manager software, controller firmware, and README files” on page xviii to learn how to access the DCS3700 README files on the Web.

2 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

DCS3700 Features

Table 1 summarizes the features of the DCS3700 storage subsystem and expansion enclosure. For a list of the operating specifications, such as weight, height, and heat output, see “Specifications” on page 17.

Table 1. DCS3700 features

General:

v Modular components

– RAID storage controller

modules

– Environmental services modules

(ESMs) – Power supplies – Fan assembly – High-capacity disk drives

v Technology

– Support for RAID 0, 1, 3, 5 and

6 disk arrays – Storage capacity up to 360 TB – Support for up to 180 SAS or

NL-SAS disk drives when using

two additional expansion

enclosures – Controller cache size of 2 GB

per controller for a total of 4 GB

per storage subsystem – Cache memory upgradable to 4

GB per controller for a total of 8

GB per storage subsystem – Support for 6 Gbps SAS host

interface on the controller – Each controller supports one

host interface adapter. Support

for:

- 6 Gbps SAS

- 8 Gbps FC

– Redundant controllers or ESMs,

power supply and fan

assemblies – Hot-swap technology for

controllers and power supply

v User interface

– Built-in power, activity, and

fault LEDs, identification

labeling on components, rear

LEDs, and connectors – Easy-to-replace drives, power

supplies, fan assemblies,

controllers and ESMs

Storage Subsystem:

v RAID controllers

– Host interface: Two 26-pin,

mini-SAS connectors per controller

– Expansion: One 26 pin,

mini-SAS connector per controller

– Dual 1Gbps Ethernet

management ports

– Seven segment display

v Power supply:

– Two hot-swap 1755-watt (200 -

240V ac) standard

– Provides redundant power

v Premium Feature Options:

– FlashCopy – VolumeCopy – Enhanced Remote Mirroring

Storage expansion enclosure:

v ESM

– Host interface: Two 26-pin,

mini-SAS connectors per controller

– Expansion: One 26 pin,

mini-SAS connector per controller

– Single 100Mbps Ethernet debug

port

– Seven segment display

v Power supply:

– Two hot-swap 1755-watt (200 -

240V ac) standard

– Provides redundant power

Chapter 1. Introduction 3

Inventory checklist

The following illustration and inventory list show the items that you need to install the storage expansion enclosure in the rack cabinet. If any items are missing or damaged, contact your place of purchase.

Notes:

1. The illustration might differ slightly from your hardware.

2. Depending on your DCS3700 order, your shipping box might contain additional materials that are not

shown in the following illustration.

Fan assembly (2)

Power supply (2)

Controller or ESM (2)

Clip nuts (4)

M5 x 8 mm screws (16)

Handles (4)

Rear brackets

Support rails

Bezel

PDU jumper cord

Disk drive module (20 or more)

Drive drawer assembly (5)

After you unpack the DCS3700, verify that you have the following items: v 4U-high storage enclosure (1)

– Drive drawer assemblies (5) – Fan assemblies (2) – Power supplies (2) – ESMs (2) (for 1818 80E)

Storage enclosure

dcsq0007

4 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

– Controllers (2) (for 1818 80C)

v Handles (4), packaged in a smaller box inside the shipping box v DDMs (20 or more, depending on your DCS3700 order), packaged in a smaller box inside the shipping

box

v Bezel (1) v Rack-mounting hardware kit (1), packaged in a smaller box inside the shipping box, including:

– Rails (2), right and left assembly – Rear brackets (2) – M5 black hex-head slotted screws (16)

Note: The screws are either preinstalled in the support rails or packaged in a plastic bag. – Washers (8) – Clip nuts (4)

Important: The DCS3700 does not ship with region-specific ac power cords. You must obtain the

IBM-approved power cords for your region. See Appendix D, “Power cords,” on page 153 for more information.

Receiving product updates and support notifications

Be sure to download the latest versions of the following packages at the time of initial installation and when product updates become available:

v DS Storage Manager host software v DCS3700 storage system controller firmware and NVSRAM v DCS3700 expansion unit ESM firmware v Drive firmware

Important

Keep your system up-to-date with the latest firmware and other product updates by subscribing to receive support notifications.

For more information about how to register for support notifications, see the Stay Informed section of the IBM Disk Support Web site:

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 Service Action Required 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 DCS3700 right and left power supplies into two independent

external power circuits through distribution units inside a rack cabinet or directly into external receptacles. This ensures that the DCS3700 storage system and all its attached expansion enclosures have power in the event that only one power circuit is available. In addition, having all the right or all the left power cables plugged into the same power circuit enables the storage devices in the configuration to power on simultaneously during an unattended restoration of power.

Note: Do not overload the circuits that power your storage subsystem and storage expansion

enclosures. Use additional pairs of power distribution units (PDUs) if necessary. Refer to Table 9 on page 19

Chapter 1. Introduction 5

on page 19 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), complete the following tasks:

1. Save the storage subsystem profile.

2. Save the storage subsystem configuration.

3. Save the Collect All Support Data (CASD).

Make sure that you save the files in a location other than in the logical drives that were created for the storage subsystem.

For more information on how to complete these tasks, check the DS Storage Manager online help or the DS Storage Manager guide for your operating system.

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

listed in “Restoring power after an unexpected shutdown” on page 85. 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.

v The storage subsystem supports simultaneous power-up to the system components; however, you

should always follow the power-up sequence listed in “Restoring power after an unexpected shutdown” on page 85 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 subsystems are not displayed in the DS Storage Manager

graphical user interface (GUI).

– The storage subsystem logical drives and subsystems do not come online. – The storage subsystem logical drives and subsystems seem to be degraded.

DCS3700 components

The DCS3700 storage system directs and manages the I/O activity between a host and the drives in a RAID array. The DCS3700 expansion unit provides additional storage capacity to the storage system.

Figure 1 on page 7 shows the DCS3700 unit without the front bezel in place.

Note: The illustration in this document might differ slightly from your hardware.

6 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figure 1. Isometric view of the DCS3700

The DCS3700 has the following removable components. These components, called field replaceable units (FRUs), are accessible from the front or back of the enclosure.

v Five drive drawers, including the right and left cable chains. v 20 minimum to 60 maximum Disk Drive Modules (DDMs) v Two RAID controllers (for the 1818-80C) v Two environmental service modules (ESMs) (for the 1818-80E) v Two power supplies v Two fan assemblies

The hot-swap features of the DCS3700 enable you to remove and replace DDMs, power supplies, fan assemblies, ESMs, and Raid controllers without turning off the storage expansion enclosure. You can maintain the availability of your system while a hot-swap device is removed, installed, or replaced.

The DCS3700 expansion unit is the storage expansion enclosure specifically designed for use with the DCS3700 storage system. The DCS3700 can support up to two DCS3700 expansion enclosures for a total of 180 disk drive modules (DDM).

Drive drawers

Both the DCS3700 storage system and DCS3700 expansion enclosure have five removable drive drawers that are accessible from the front of the enclosure (see Figure 2 on page 8). Each drive drawer can contain up to 12 disk drives (see Figure 3 on page 8). With the drive drawers fully populated, the DCS3700 can support up to 60 DDMs.

Note: Drive drawers might be also referred to as drive trays in other publications.

Chapter 1. Introduction 7

Drive drawers

Figure 2. DCS3700 hot-swap drive drawers

Front-row drives

dcsq0004

Figure 3. DCS3700 drive drawer

Important: The installation order within each drive drawer is from left to right in rows. Slots 1, 4, 7 and

10 must have a drive installed in these locations to make sure there is sufficient air flow to the drives (see Figure 3). To verify these slots, consult the overlay on the front of each of the five drive drawers. Make sure the four drives in each row are adjacent to each other. The long edge of each drive should touch the drive next to it. To maintain a uniform airflow across all drive drawers, the storage expansion enclosure must be configured with a minimum of 20 drives, with four drives in the front row of each of the five drive drawers.

Disk Drive Modules (DDMs)

The DSC3700 supports up to 60 DDMs in five drive drawers that are accessible from the front of the storage expansion enclosure. The disk drawer planar board supports 6 Gbps SAS (Serial Attached SCSI) and Near-Line SAS drives.

Attention: The DSC3700 DDM and the EXP5060 SATA DDM are not compatible. Do not use the DSC3700 DDMs in an EXP5060 storage expansion enclosures. Similarly, do not use the EXP5060 SATA DDM in an DSC3700 enclosure

There are no servicable parts in a DDM FRU. If it fails, it must be replaced in its entirety. When replacing a DDM FRU, be sure to order and install the correct DDM FRU.

8 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Attention:

1. After you remove a drive FRU, wait 90 seconds before replacing or reseating the drive FRU to allow the drive to properly spin down. Failure to do so may cause undesired events.

2. Never hot-swap a drive FRU when its associated green Activity LED is flashing. Hot-swap a drive FRU only when its associated blue Service Action Allowed LED is lit and the drive is inactive.

Note: If the DDM you want to remove is not in a failed or bypass state, always use the DS Storage

Manager client program either to place the DDM in a failed state or to place the array that is associated with the DDM (or DDMs) in an offline state before you remove it from the enclosure.

Controllers

The DCS3700 storage system (1818-80C) comes with two hot-swappable and redundant controllers. The controllers contain the storage subsystem control logic, interface ports, and LEDs. The controllers install from the rear of the storage enclosure. Controller A is installed in storage bridge bay slot A (SBB A) and controller B is installed in storage bridge bay slot B (SBB B). All connections to the hosts and the expansion enclosures are made through the controllers. Figure 4 shows the location of the controllers in the DCS3700.

Figure 4. Location of the DCS3700 controllers

Information about the condition of the controllers is conveyed by indicator LEDs on the controller. See “Controller LEDs” on page 74 for more information on the LEDs found on the RAID controller.

Controller cable connections

Each controller contains the following connections:

v Two 6 Gbps x4 SAS host ports v One 6 Gbps x4 SAS expansion port to connect DCS3700 expansion enclosures v Two RJ-45 Ethernet ports for subsystem management v Support for one optional host interface card (HIC)

– Two-port 6 Gbps SAS – Four-port 8 Gbps FC

Attention: The DCS3700 storage system controllers must be identical to each other in hardware (host port adapter and cache size) and firmware. If you install a host port adapter in one controller, you must install an identical host port adapter in the other controller.

Figure 5 on page 10 identifies the connectors found on the controller.

Chapter 1. Introduction 9

Figure 5. DCS3700 connectors

Host ports

The DCS3700 storage system supports 6Gbps SAS on the base controller. The controller also contains an upgradable interface slot that can support an optional 6Gbps 2-port SAS host interface card or 8Gbps 4-port FC host interface card.

The controller host interface ports performs an automatic link speed negotiation when it is connected to a host or a switch. The host ports can operate at the following speeds:

v 6 Gbps SAS host ports can operate at either 3 or 6 Gbps v 8 Gbps FC host ports can operate at 2, 4 or 8 Gbps

The controller performs link speed negotiation during the following events:

v Start-of-day v Detection of a link-up event following a previous link-down event

Expansion ports

Each controller has a single 6 Gbps x4 SAS expansion port that is used to connect expansion enclosures to the storage system. The two SAS expansion ports (one on each controller) are used to form a redundant drive channel.

Ethernet management ports

The Ethernet connections provide for out-of-band management of the controller. Each controller has two RJ-45 Ethernet ports that support either 100Base-T or 1000Base-T connections.

One Ethernet port on each controller is used for daily management of the storage subsystem, while the second port is reserved for service personnel or as a backup port in the event the primary port fails.

The default IP addresses for the Ethernet ports are as follows:

v Port 1 on controller A is 192.168.128.101 v Port 2 on controller A is 192.168.129.101 v Port 1 on controller B is 192.168.128.102 v Port 2 on controller B is 192.168.129.102

The subnet mask for all Ethernet ports is 255.255.255.0.

10 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Serial port

The serial port located on each controller uses a 6-pin Mini-DIN connector. This port is intended to be used by service personnel only to provide diagnostic operations on the RAID controllers. The maximum baud rate is 115200 bps and the factory default baud rate is 38400 bps.

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.

Cache memory

Each RAID controller has data cache memory. The data cache memory is a buffer used to temporarily store hard disk drive data during data read and write operations. The Cache Active LED on the controller turns on when the cache contains data that has not been written to the hard disk drives. The Cache Active LED is off when there is no data stored in cache. The DCS3700 storage system is available with either 4 GB (2GB per controller) or 8GB (4GB per controller) of cache memory.

Cache battery backup module

Each controller contains either 2048 MB or 4096 MB of cache memory. The controller also contains a sealed, rechargeable lithium ion battery that maintains data in the cache so that it can be transferred to flash memory in the event of a power failure.

Figure 6 shows the locations of the cache battery and memory cache DIMM in the controller.

Host adapter or filler panel

Memory cache DIMM

Battery connector

Memory cache battery

Captive fastener

Figure 6. Cache battery and memory cache DIMM locations

The battery chargers in the power supplies perform a battery learn test when the storage subsystem is started for the first time and on a regularly scheduled interval thereafter. Data caching starts after the battery tests are completed.

The condition of the battery is indicated by an LED on the rear of the controller (see “Controller LEDs” on page 74 for the location of the battery fault LED and conditions that the LED indicates). You can also check the status of the battery using the Storage Manager client software.

Environmental Service Modules (ESMs)

The DCS3700 has two hot-swappable and redundant ESM units. The ESMs are located at the back of the DCS3700 expansion enclosure. The ESM in SBB A is called ESM A, while the ESM in SBB B is called ESM B. One ESM continues to operate if the other ESM fails.

The ESMs contain the storage expansion enclosure control logic, interface ports, and LEDs. Each ESM has two 6Gbps x4 SAS IN ports and a single 6Gbps x4 SAS OUT port. The SAS IN ports are used to connect the ESM to a RAID controller or another ESM. The SAS OUT port is used to cascade that ESM to another enclosure. The use of both ports on each ESM results in a redundant drive connection.

Chapter 1. Introduction 11

Figure 7 shows the location of the SAS IN and OUT ports on the ESMs.

The DCS3700 ESMs support automatic ESM firmware synchronization. This function allows a new ESM with a different level of ESM firmware to be automatically synchronized with the ESM firmware version in the existing ESM in the enclosure. To enable automatic ESM firmware synchronization:

1. Verify that the DS Storage Manager Event Monitor is installed and running.

2. Verify that the storage subsystem attached is defined in the Enterprise Management window of the

DS Storage Manager client (SMclient).

SAS out connectorSAS in connector 2SAS in connector 1

ACDC

Lnk Lnk Lnk Lnk

8 8

Lnk Lnk Lnk Lnk

8 8

ID/Diag

ACDC

Lnk Lnk

dcsi0002

Figure 7. ESM SAS port locations

Enclosure ID

Each controller and ESM contains two seven-segment numeric display LEDs. These are used to provide the enclosure identification but also they are used to provide diagnostic data.

The two digits that comprise the enclosure ID are referred to as x10 and x1 digits. The enclosure ID provides a unique identifier for each enclosure in the storage subsystem.

The storage management software automatically sets the enclosure ID for each controller. You can only change the enclosure ID setting through the Storage Manager software. There are no switches on the enclosure to manually set the enclosure ID. Both controllers or ESMs in and enclosure have enclosure IDs that are identical under normal operating conditions.

Figure 8 on page 13 shows the seven-segment numeric display on the storage expansion enclosure. For more information regarding the enclosure ID, see “Enclosure ID Settings” on page 42 or “Seven-segment numeric display LEDs” on page 79.

12 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Seven-segment numeric display

ACDC

Lnk Lnk Lnk Lnk

8 8

Lnk Lnk Lnk Lnk

8 8

ID/Diag

ACDC

Lnk Lnk

dcsi0001

Figure 8. Location of seven-segment numeric display on ESM

Power supplies

The storage expansion enclosure has two removable power supplies. The power supplies provide power to the internal components. If one power supply is turned off or malfunctions, the other power supply maintains electrical power to the storage expansion enclosure.

Note: To preserve the optimal airflow, do not remove a failed power supply FRU from the DCS3700

chassis until you are ready to replace it with a new FRU.

Figure 9 shows the power supply controls, LEDs, and connectors.

Power connector

Power switch LEDs

Lnk Lnk Lnk Lnk

8 8

Lnk Lnk Lnk Lnk

8 8

ACDC

ID/Diag

ACDC

Power supply A

Lnk Lnk

Power supply B

dcsi0004

Figure 9. Power supply components

Fan assemblies

The storage expansion enclosure has two removable fan assemblies. Each fan assembly contains two fans. The fan assemblies pull air through the enclosure from front to back across the drives. The fans provide redundant cooling, which means that if one of the fans fails, the remaining fan assembly continues to provide sufficient cooling to operate the storage expansion enclosure. The fan will operate at maximum speed under the following conditions:

v During the first few minutes after power is applied to the DCS3700 enclosure

Chapter 1. Introduction 13

v When one of the disk drawers is pulled out or not in the closed/latched position v When one of the fan assemblies has failed or is removed from the enclosure

Note: To preserve the optimal airflow, do not remove a failed fan assembly FRU from the chassis until

you are ready to replace it with a new FRU.

Figure 10 shows the location of the fan assemblies. See “Fan assembly LEDs” on page 76 for information about the fan assembly status LEDs.

Note: Although both fan assemblies (left and right) are identical, they are seated in the enclosure in

opposite orientations. If the fan assembly cannot be fully inserted in the fan assembly bay, rotate it 180 degrees and reinsert it. In addition, there are notches on the top and bottom of the fan assembly bay. Make sure that the slits on the top and bottom of the fan assembly line up with these two notches before the fan assembly is fully inserted in the fan bay.

Fan unit A Fan unit B

ACDC

Lnk Lnk Lnk Lnk

8 8

Lnk Lnk Lnk Lnk

8 8

ID/Diag

ACDC

Lnk Lnk

dcsi0003

Figure 10. Fan assembly components

Figure 11 shows fan assembly airflow through the storage expansion enclosure.

Back

Front

Figure 11. Storage expansion enclosure airflow

14 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

dcsi0014

Small Form-Factor Pluggable (SFP) modules

The DCS3700 storage system controllers support the optional 8Gbps fibre channel host interface card. The fibre channel host interface card contains four host port interface connectors. You must install a Small Form-factor Pluggable (SFP) module in each interface connector on the controller where a fibre optic cable is to be installed.

Figure 12 shows an SFP module with fibre optic cable.

Note: The SFP module shown might look different from those shipped with your fibre channel host

daughter card option. The differences does not affect transceiver performance.

I O

L n

n k

ID/Diag

L n

n k

Fiber-optic cable

I O

SFP module

ID/Diag

n k

L n

n k

L n

dcsi0005

Figure 12. SFP module and fibre optic cable

Software and hardware compatibility and upgrades

The latest DCS3700 controller firmware and NVSRAM, expansion enclosure ESM firmware, and the drive firmware must be installed to ensure optimal functionality, manageability, and reliability.

Unless stated otherwise, you can find the latest publications, firmware, and host software at www.ibm.com/support/entry/portal.

Software and firmware support code upgrades

To enable support for the DCS3700, you must ensure that your system's software and firmware are at the latest levels. Table 2 shows the minimum supported software and firmware levels.

Table 2. Minimum DCS3700 software and firmware levels

Software/firmware Level

DS Storage Manager software 10.77.xx.xx or higher DCS3700 controller firmware and

NVSRAM ESM firmware 0343

07.77.18.00 and N1818D37R0777V05 or higher

Chapter 1. Introduction 15

Table 2. Minimum DCS3700 software and firmware levels (continued)

Software/firmware Level

Drive firmware You can find the latest software and firmware at the IBM System

Storage Support Web site:

www.ibm.com/servers/storage/support/disk/

To find the latest Storage Manager software, controller firmware, NVSRAM, ESM firmware, and drive firmware, check the firmware readme files.

See the IBM System Storage DS

Storage Manager Version 10 Installation and Host Support Guide for your

operating system for instructions that describe how to install the DS Storage Manager host software.

If you need further assistance, please contact your IBM reseller or IBM representative to find out which controller firmware to use for DCS3700 attachment.

For more information about the DCS3700 parts replacement procedure and problem troubleshooting, please refer to “Solving problems” on page 129.

Determining firmware levels

There are two different methods to determine the DCS3700 storage system and DCS3700 expansion enclosure firmware versions. Each method uses the DS Storage Manager client that manages the DCS3700 storage subsystem with the attached storage expansion enclosure.

Method One:

Go to the Subsystem Management window and select View → Storage Subsystem Profile. When the Storage Subsystem Profile window opens, select the All tab and scroll through Profile For Storage Subsystem to locate the following information.

Note: The Profile For Storage Subsystem windows contains all the profile information for the entire

subsystem. Therefore, it may be necessary to scroll through a large amount of information to locate the firmware version numbers.

DSC3700 storage system

v NVSRAM version v Firmware version

Drives

v Drive Firmware version

DCS3700 expansion unit

v ESM card firmware version

Method Two:

Complete the appropriate procedure to obtain the specified firmware version.

To obtain the controller firmware version:

Click on the Controller icon in the left pane of the Physical View tab of the Subsystem Management window. The properties of the controller will be displayed in the right pane of the Physical view tab.

You must perform this step for each individual controller.

16 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

To obtain the drive firmware version:

Click on the drive icon in the left pane of the Physical View tab of the Subsystem Management window. The properties of the drive will be displayed in the right pane of the Physical view tab.

You must perform this step for each individual drive.

To obtain the ESM and drive enclosure component firmware versions:

1. In the left pane of the Physical View tab in the Subsystem Management window, click the Drive Enclosure Component icon for the enclosure that you want to check the firmware version. The Drive Enclosure Component Information window opens.

2. Click the ESM icon in the left pane. The ESM information displays in the right pane of the Drive Enclosure Component Information window.

3. Locate the firmware version of each ESM in the drive enclosure.

Specifications

This section provides site specifications for the storage expansion enclosure. Before installing a storage expansion enclosure, 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 storage expansion enclosure 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

The DCS3700 conforms to the 19-inch rack standard. Table 3 shows the dimensions of the DCS3700, with all components installed including the bezel.

Table 3. DCS3700 storage expansion enclosure dimensions

Height Width Depth

6.93 in. (17.6 cm) 19 in. (48.3 cm) 34.1 in. (86.6 cm)

Enclosure full depth including a cable bend radius of 2.7 inches is 36.8 inches (93.5 cm).

Weight

The total weight of the storage enclosure depends on the configuration of the unit. Table 4 lists the maximum, empty, and shipping weights for the DCS3700 in different configurations. Table 5 on page 18 lists the weight of each component.

Table 4. DCS3700 weights

Weight

Unit

DCS3700 storage system 102.1 kg (225.2 lb) 57.5 kg (126.8 lb) 100 kg (220 lb) DCS3700 expansion unit 101.0 kg (222.6 lb) 56.3 kg (124.2 lb)

Chassis with all FRUs and 60 drives.

Chassis without drives but with midplane and all FRUs.

Includes the DCS3700, support rails, power cords, publications, 20 drives, shipping material, and the pallet.

Maximum

Empty

Shipping

Chapter 1. Introduction 17

Table 5. DCS3700 component weights

Unit Weight

DCS3700 storage expansion enclosure with midplane only (all FRUs removed)

Drive drawer (includes cable chains but no drives) 5.2 kg (11.5 lb)

3.5in Disk drive module 0.7 kg (1.6 lb) Power supply 2.5 kg (5.5 lb) Fan assembly 1.1 kg (2.4 lb) ESM 1.5 kg (3.4 lb) Controller with cache battery backup, no HIC 2.0 kg (4.5 lb)

19.5 kg (43 lb)

Shipping dimensions

The DCS3700 is shipped on a pallet. Table 6 lists shipping carton dimensions.

Table 6. DCS3700 shipping carton dimensions

Width Depth Height

24 in. (61 cm) 39.75 in. (101 cm) 29.5 in. (74.9 cm)

The height shown includes the height of the pallet.

Environmental requirements and specifications

This section describes the environmental requirements and specifications for the storage expansion enclosure, including temperature and humidity, altitude, airflow and heat dissipation, shock and vibration requirements, and acoustic noise levels.

Temperature and humidity

Table 7 lists the acceptable temperature and humidity ranges for the DCS3700 storage expansion enclosure when in storage or in transit.

Note: 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.

Table 7. Temperature and humidity requirements for storage expansion enclosure when in storage or in transit

Condition Parameter Requirement

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

Maximum rate of change 10° C (18° F) per hour Storage range -10° - 65° C (14° - 149° F) Maximum rate of change 15° C (27° F) per hour Transit range -40° C to 65° C (-40° F to 149° F) Maximum rate of change 20° C (36° F) per hour

Relative humidity (no condensation) Operating range 20% to 80%

Storage range 10% to 90% Transit range 5% to 95% Maximum dew point 26° C (79° F) Maximum gradient 10% per hour

18 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Altitude

Table 8 lists the acceptable altitudes for operating, storing, and shipping the DCS3700.

Table 8. DCS3700 altitude ranges

Environment Altitude

Operating 30.5 m (100 ft.) below sea level to 3000 m (9,840 ft) above

sea level

Storage 30.5 m (100 ft.) below sea level to 3000 m (9,840 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 13 shows the intended airflow for the DCS3700. 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.

Back

Front

Figure 13. DCS3700 airflow

Table 9 lists the KVA, watts, and Btu calculations. These values assume the power supplies have a 88 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.

Table 9. DCS3700 power and heat dissipation

Parameter KVA Watts (ac) Btu per hour

DCS3700 storage system .929 896 3057 DCS3700 expansion unit .895 802 2736

Shock and vibration requirements

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

Operational Shock: The DCS3700 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:

Chapter 1. Introduction 19

v Velocity change = 20 inches per second v Wave form = 1/2 Sine, 10g @5ms

Operational Vibration (Random): While in its normal operating position, the DCS3700 will continue operating when subjected to a random vibration test using the criteria shown in Table 10. This test uses the indicated spectral power density for 30 minutes in each of the three axes.

Table 10. Random vibration power spectral density

Hz 5 17 150 200 500

/Hz 9.0x10

-5

3.0x10

-4

3.0x10

-4

9.0x10

-5

9.0x10

-5

Acoustic noise

Table 11 lists the maximum sound levels emitted by the storage subsystem.

Table 11. DCS3700 sound levels

Measurement Level

Sound power (normal operation) 7.0 bels

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 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.

Attention: The DCS3700 does not support 90-136V AC sources. It supports 200-240V AC sources only. Ensure that the AC input is appropriate for the DCS3700 before turning the power switches to the on position.

Table 12. DCS3700 ac power requirements

AC Power Requirements Range

Nominal Voltage 180 to 264 VAC Frequency (Hertz) 50 to 60 Hz Idle Current 4.27 A Maximum Operating Current 4.10 A Maximum Surge Current 7.82 A

Typical voltage: 220 V AC, 50 Hz

20 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Power and site wiring requirements for models with power supply and fan units

The storage expansion enclosure uses wide-ranging redundant power supplies that automatically accommodate voltages to the power source. The power supplies operate within the ranges specified in Table 12 on page 20. 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 voltage and current ratings for the DCS3700 storage expansion enclosure are 200 VAC - 240 VAC and 7.56 A - 6.30 A.

Power recovery after a power failure: After a total power failure, after normal power is restored, the storage expansion enclosure performs power-up recovery procedures automatically without operator intervention.

Power cords and receptacles: The DCS3700 ships with two jumper cords with IEC C19 plug on one end and IEC C14 plug on the other end that are used to connect to the rack PDU outlets. It is not shipped with the power cords that can be used to connect it directly to an electrical outlet in the destination country. You must purchase the power cords that are appropriate for use in a typical outlet in the destination country. See Appendix D, “Power cords,” on page 153 for more information.

Heat output, airflow, and cooling

See “Airflow and heat dissipation” on page 19 for heat output, airflow, and cooling specifications.

Note: In general, disk subsystem reliability tends to decrease as the ambient temperature of the

environment in which it is being used increases.

When racks that contain many storage expansion enclosures are to be installed together, the following requirements must be met to ensure that the storage expansion enclosures are adequately cooled:

v Air enters at the front of the rack and leaves at the back. To prevent the air that is leaving the rack

from entering the intake of another piece of equipment, you must position the racks in alternate rows, back-to-back and front-to-front. This arrangement is known as cold aisle and hot aisle and is shown in Figure 14 on page 22.

v Where racks are in rows, each rack must touch the rack that is next to it to reduce the amount of hot

air that can flow around from the back of the rack into the intakes of the storage expansion enclosures that are in that rack. You should use Suite Attach Kits to completely seal any gaps that remain between the racks. For details about Suite Attach Kits, contact your marketing representative.

v Where racks 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, the rack filler plates must be installed in unused positions. Also,

all the gaps in the front of the racks must be sealed, including the gaps between the storage expansion enclosures.

Chapter 1. Introduction 21

T42 racks

back

front

1220 mm cold aisle width

Air

Cold aisle

front

T42 racks

back

conditioner

Hot aisle

back

T42 racks

front

Airflow

Figure 14. Example of cold aisle/hot aisle rack configuration

Perforated tiles or gratings

2440 mm between center lines of hot and cold aisle

22 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Chapter 2. Installing the DCS3700

This chapter provides the information that you need to prepare the storage enclosure for installation into a rack cabinet.

“Installation overview” provides an overview of the storage enclosure installation process. Read this overview before you begin the installation.

Installation overview

This product is to be installed and serviced only by qualified IBM service representatives. The DCS3700 can be ordered pre-installed in the cabinet, or it can be added to an existing cabinet. The installation requires a minimum of two people for a safe installation.

Attention: Refer to “Safety” on page xi for general safety instructions and Appendix C, “Specifications for non-IBM rack installation,” on page 147 before performing any installation or service procedures.

102 kg (225 lbs)

56.7 kg (125 lbs)

(12 x 5)

(60X)

CAUTION:

1. The weight of this unit in the drive-ready state (without drive modules installed) is 56.7 kg (125

lb). Fully configured (with 60 drive modules installed) the unit weighs 102.1 kg (225 lb). It takes two specially trained IBM personnel with a lifting device to safely lift this unit.

2. A fully populated DCS3700 weighs approximately 102.1 kg (225 lb). Before you install it, verify

that the additional weight of the chassis does not exceed the rack’s weight limit or unbalance the rack cabinet. When you calculate the additional weight, include the weights of all components that can potentially be added, to avoid overloading in the future.

Ordering the lift tool

Note: The lift tool is required only when you install a DCS3700 or when you install or remove the

DCS3700 from the cabinet. Make sure that the lift tool is available on location at the time of the installation. The ordering procedures for the lift tool vary depending on your location. You should direct questions about these procedures to your regional representative.

World trade locations

The following ordering procedures are for world trade locations:

v Order the lift tool by using the parts order system, like any other part. v Use the following part numbers when you order: Lift tool: Part number 09P2481. v You do not record parts usage.

v Return the lift tool to the parts center after you complete the installation or removal of the DCS3700.

United States locations

In the United States, call UPS Logistics at 800–528–6070 to order the lift tool or visit the MTS/Test Equipment Service Center Web site on the IBM intranet at http://pokgsa.ibm.com/~tstesc/public/ for additional information.

Notes:

1. For the SSR branch and territory, the United States cannot order the lift tool through the parts order system. UPS Logistics are used to ship and return the lift tool. Use the following part numbers when you order: Lift tool: Part number 09P2481.

2. The MTS/Test Equipment Service Center Web site can be accessed only by IBM employees with access to the IBM intranet.

Attention: When you order the lift tool, you will receive an 18–inch load plate.

You must provide the following information when you order the lift tool. This information is necessary to ensure that the lift tool is delivered when you need it. Failure to provide this information might delay the completion of the order request and the shipping request. It might also result in a time and date to return the tool that is different from what you need.

v Phone number and customer contact v Account code: 98577 v Time and date of delivery v Accurate destination address with zip code v Time and date of return pickup

You must return the lift tool at the time that was scheduled with UPS Logistics. If you need to change the scheduled return time or date, contact UPS Logistics. You are responsible for ensuring that all of the paperwork and components are packed and restored in the lift tool shipping container. Make sure that the lift tool is functioning properly before you release the tool to UPS Logistics for return. You are accountable for the lift tool until UPS Logistics picks up the lift tool for return delivery to their parts storage facility. Contact your branch office tools coordinator or your region specialist if you have any questions or concerns.

Installation sequence

The following sequence summarizes the installation steps you will perform in this chapter:

1. Prepare the installation site and the rack cabinet. Unpack the DCS3700 and other hardware from the shipping box. See “Preparing for installation” on page 26.

102 kg (225 lbs)

(60X)

56.7 kg (125 lbs)

(12 x 5)

24 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Attention:

a. Because of the size and weight of the storage enclosure as shipped, a lift tool and two trained

service technicians are required to push the enclosure out of its custom-designed package and onto the lift tool. If a lift tool is not available, see Appendix E, “Component weights,” on page 157 for additional information.

b. Before you move or relocate a rack that contains DCS3700 storage enclosures, see “Relocating the

DCS3700” on page 65 for additional information.

Note: For more information about how to use a lift tool, see the documentation that came with the

lift tool.

2. Install the support rails in the rack. See “Installing the support rails” on page 30.

3. Install the DCS3700 storage enclosure in the rack. See “Installing the DCS3700 into a rack” on page

35.

4. Install disk drives in the DCS3700 storage enclosure. See “Installing the drives” on page 37.

5. If there are other DCS3700 storage enclosures to be installed in the same rack, repeat step 2 to step 4

for the other DCS3700 units.

6. Install the power supply cables to the DCS3700s. Make sure that the DCS3700 power supplies are connected to 240V AC sources only. See “Cabling the power supply” on page 65.

7. Cable the DCS3700 Storage system to any storage expansion enclosures. See Chapter 3, “Cabling the DCS3700,” on page 41.

8. Install the DS Storage Manager host software to manage the DCS3700 Storage system. See “Software and hardware compatibility and upgrades” on page 15 for the appropriate version. Refer to the IBM System Storage DS Storage Manager Version 10 Installation and Host Support Guide for your operating system for instructions on how to install the DS Storage Manager host software.

9. Turn on the DCS3700 (if you have not done so already). See “Powering on the DCS3700” on page 68.

10. Upgrade the controller firmware. See “Finding Storage Manager software, controller firmware, and

README files” on page xviii for more information.

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, 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.

v Take additional care when handling devices during cold weather because heating reduces indoor

humidity and increases static electricity.

Chapter 2. Installing the DCS3700 25

Preparing for installation

Before installing the storage enclosure, create a detailed plan of how this unit will be used in your storage configuration. The plan should include determining RAID levels, fallover requirements, operating systems to be used, and total storage capacity requirements.

Complete the following steps to prepare the storage enclosure 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 17.

2. Move the storage enclosure to the site.

102 kg (225 lbs)

56.7 kg (125 lbs)

(12 x 5)

(60X)

Attention:

a. Because of the size and weight of the storage enclosure as shipped, a lift tool and two trained

b. Before you move or relocate a rack that contains DCS3700 storage enclosures, see “Relocating the

DCS3700” on page 65 for additional information.

Note: For more information about how to use a lift tool, see the documentation that came with the

lift tool.

3. Remove the storage enclosure from its shipping container and check the contents (see “Unpacking the shipping box”). If any items are missing, contact your IBM reseller before proceeding.

4. Verify that you have the correct version of the IBM DS Storage Manager software.

5. Continue with “Preparing the site” on page 29.

Unpacking the shipping box

Important: Do not remove the storage enclosure from the shipping box until the support rails are

installed in the rack cabinet. You must install the support rails in the rack cabinet before you install the storage enclosure.

The disk drive modules (DDMs) that come with the storage enclosure are packaged in a smaller box inside the shipping box. To unpack the shipping box, complete the following steps:

1. Remove the following items from the shipping box. Do not remove the DCS3700 from the shipping box at this time.

v Six full or empty boxes of DDMs

26 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Note: The DDMs are packaged ten per box. The minimum order is 20 DDMs, so at least two of the

boxes are full. If you ordered less than the maximum number of 60 DDMs, one or more of the boxes are empty.

v Box containing the mounting hardware kit v Box containing storage enclosure handles v Box containing the power cords and documentation

2. Check the items in the preceding list to make sure that you received all the necessary parts. See the “Inventory list” on page 28 for the parts that are included with the storage enclosure.

Chapter 2. Installing the DCS3700 27

Inventory list

The following illustration and inventory list show the items that you need to install the storage enclosure in the rack cabinet. If any items are missing or damaged, contact your place of purchase.

Notes:

1. The illustration might differ slightly from your hardware.

2. Depending on your DCS3700 order, your shipping box might contain additional materials that are not

shown in the following illustration.

Fan assembly (2)

Power supply (2)

Controller or ESM (2)

Clip nuts (4)

M5 x 8 mm screws (16)

Handles (4)

Rear brackets

Support rails

Bezel

PDU jumper cord

Disk drive module (20 or more)

Drive drawer assembly (5)

After you unpack the DCS3700, verify that you have the following items: v 4U-high storage enclosure (1)

– Drive drawer assemblies (5) – Fan assemblies (2) – Power supplies (2) – Controllers (2), if you ordered 1818-80C – ESMs (2), if you ordered 1818-80E

Storage enclosure

dcsq0007

28 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

v Handles (4), packaged in a smaller box inside the shipping box v DDMs (20 or more, depending on your DCS3700 order), packaged in a smaller box inside the shipping

box

v Bezel (1) v Rack-mounting hardware kit (1), packaged in a smaller box inside the shipping box, including:

– Rails (2), right and left assembly – Rear brackets (2) – M5 black hex-head slotted screws (16)

Note: The screws are either preinstalled in the support rails or packaged in a plastic bag. – Washers (8) – Clip nuts (4)

Important: The DCS3700 does not ship with region-specific ac power cords. You must obtain the

IBM-approved power cords for your region. See Appendix D, “Power cords,” on page 153 for more information.

Tools

Before you install the storage enclosure, the installation area must have an Internet connection, and you must have the following tools:

v A cart to hold the storage enclosure and its components v Labels for the cable connectors v A medium flat-blade screwdriver v A No. 2 Phillips screwdriver or an M5 hex driver v Anti-static protection

Tools and hardware required

Gather the tools and equipment you will need for installation. These might include the following:

v A portable mechanized lift v A number 2 Phillips screwdriver v An M5 hex nut driver v A medium flat-blade screwdriver v Antistatic protection (such as a grounding wrist strap) v The rack power jumper cords that are shipped with the storage enclosure v Fibre channel (FC) and Ethernet interface cables and cable straps v SFP modules v Rack-mounting hardware that ships with the storage enclosure

Preparing the site

This section lists the floor space requirements and weight information for the storage enclosure. For information on interface cables and connections, see Chapter 3, “Cabling the DCS3700,” on page 41.

Floor space: The floor area at the installation site must provide the following conditions:

v Enough stability to support the weight of the fully configured storage enclosure and associated systems v Sufficient space to install the storage enclosure

Chapter 2. Installing the DCS3700 29

Weight: The storage enclosure total weight depends on the number of components that are installed. A fully configured storage enclosure with two power supplies, two fan assemblies, two controllers or ESMs, and 60 hard disk drives installed weighs up to 225 lbs (102.1 kg). See Appendix E, “Component weights,” on page 157 for additional information.

Other: Consider the following important preparation activities:

v Install uninterruptible power supply (UPS) devices. v Install host bus adapters (HBAs), switches, or other devices, if applicable. v Route interface cables from the hosts or switches to the installation area. v Route main power cords to the installation area.

Continue with “Preparing the rack.”

Preparing the rack

Important: Before you install the storage enclosure in a rack, keep in mind the following considerations:

v When DCS3700 enclosures are to be plant or field integrated into the IBM racks, the rack must be

configured with PDU power cords rated for 240 volt electrical service.

v IBM does not support the ruggedized rack feature for the 2101-200 rack when it is used with the

DCS3700. The DCS3700 will not fit in the 2101-200 rack if the ruggedized rack feature is installed.

v Do not install the DCS3700 above EIA Unit position 32 in any rack. Installing the DCS3700 above U

position 32 requires a ladder and is not supported.

v If you are using a non-IBM rack or cabinet, review the information in Appendix C, “Specifications for

non-IBM rack installation,” on page 147.

v Do not extend more than one device out of the rack cabinet at the same time. v To ensure proper airflow, do not block the air vents; 15 cm (6 in.) of air space is sufficient. v To ensure rack stability, load the rack starting at the bottom. v If you install multiple components in the rack, do not overload the power outlets. v Always connect the storage enclosure to a properly grounded outlet.

Complete the following steps to prepare the rack before you install the storage enclosure:

1. Move, unpack, and level the rack at the installation site (if needed).

2. Remove the external rack panels.

3. If necessary, stop all I/O activity to the devices in the rack.

4. If necessary, turn off all drive enclosure and rack 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

Note: Duplicate copies of the rack mounting templates are provided in Appendix B, “Rack mounting

template,” on page 143. If you want to tear out the templates from this document for easier use, use the copies in Appendix B, “Rack mounting template,” on page 143 rather than the copies provided in this section.

Use the following templates (Figure 15 on page 31 and Figure 16 on page 32) to identify the proper locations for inserting M5 screws when mounting the support rails and DCS3700 to a rack. The locations for the M5 screws are highlighted in the templates.

30 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

The DCS3700 is 4U 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 that are shown in the following templates are round. The holes in your rack

might be round, square, or threaded.

Install second

Install first

Install second Install second

Install second

Install first

FRONT

Rack Mounting

Template

Rail assembly

(front left)

Install first Install first

Figure 15. Front rack mounting template

Rail assembly

(front right)

Chapter 2. Installing the DCS3700 31

Rear bracket Rear bracket

Rack Mounting

Rail assembly

(rear left)

REAR

Template

Rail assembly

(rear right)

Rail mounting guide

Figure 16. Rear rack mounting template

Before installing the DCS3700 in a rack, you must install the rails and rack-mounting hardware that come with your storage enclosure. The DCS3700 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, is 76 cm (30 in.) minimum and 81.28 cm (32 in.) maximum. This rack conforms to the EIA standard. Where you place the support rails in the rack depends on where you intend to position the storage enclosure.

Use the front and rear rack-mounting templates in Figure 15 on page 31 and Figure 16 to align the support rails and rear brackets with the correct rack holes. If the support rails will be installed above an

32 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Printed in the U.S.A

existing storage subsystem or storage enclosure, position the DCS3700 support rails directly above it. If the support rails will be installed below an existing storage subsystem or storage enclosure, allow 178 mm (7 in.) of vertical clearance for the DCS3700.

Notes:

1. For proper weight distribution, install the support rails as low in the rack cabinet as possible.

2. The rack cabinet must have a minimum depth of 100 cm (40 in.).

3. If you are using a non-IBM rack or cabinet, review the information in Appendix C, “Specifications for

non-IBM rack installation,” on page 147.

To install the left and right support rails in the rack cabinet, complete the following steps.

1. Make sure that the rack has already been installed.

2. Make sure that a stabilizer has been attached correctly to the bottom front of the rack to prevent the

rack from tipping forward while the storage enclosure is being installed. Refer to the installation and service guide, or equivalent, for the rack as required.

3. Locate the two support rails, eight M5 screws, and eight washers that are supplied with the storage enclosure.

Note: The screws and washers might already be attached to the support rails. If so, remove them

from the support rails.

4. Starting with the left support rail, loosen the two rail adjustment screws with a medium flat-blade screwdriver. The adjustment screws are used to lock the support rails at a certain length.

Note: The support rails are not marked as left or right. However, each rail can be mounted correctly

on only one side of the rack cabinet. The rails should be mounted with the alignment pin at the rear of the rack.

Rear

Screws

Front

Rear rack cabinet rail

Front rack cabinet rail

Screws

Support rail lip

Rail adjustment screws

5. Hold the front of the left support rail against the inside of the front rack cabinet support flange, and

extend the rear of the support rail until it makes contact with the rear rack cabinet support flange. The alignment pins at the rear of the support rail slide into the mounting holes at the rear of the rack cabinet. The wider end of the support rail must be positioned at the front of the rack cabinet.

6. From the front of the rack cabinet, with the support-rail flanges positioned inside the rack cabinet support rail assemblies, insert two M5 screws with washers through the front of the cabinet and screw them into the support rail front flange. Make sure that you use a washer when you install an M5 screw through a square hole on a rack-mounting flange.

Attention: Make sure that the screws are tight enough to support the weight of the storage enclosure, but do not completely tighten the screws yet.

Chapter 2. Installing the DCS3700 33

7. Make sure that the holes in the rail above and below the top mounting screw are visible through the holes of the rack flange and tighten the two M5 screws to secure the front of the rail to the rack flange.

8. From the rear of the rack cabinet, insert two M5 screws with washers through the rear of the cabinet and screw them into the support rail rear flange.

9. Tighten the two rail adjustment screws with a medium flat-blade screwdriver.

10. Repeat steps 4 on page 33 through 9 for the right support rail.

Note: Because the mounting holes on the rack are not always the same size as the mounting screws,

the lip of each of the support rails might not line up evenly. Make minor adjustments as needed to make sure that the lip of the left and right support rails are lined up evenly on the racks. Failure to do so will cause the storage enclosure to fit unevenly in the rack.

11. Locate the two rear brackets, four M5 screws, four washers, and four clip nuts that are supplied with the storage enclosure.

12. Install the rear brackets at the rear of the rack as shown in the following illustration, using the M5

screws, washers, and clip nuts to secure the brackets to the rack mounting holes. Do not tighten the screws until the DCS3700 is installed in the rack (see 8 on page 37).

13. Continue with “Installing the DCS3700 into a rack” on page 35.

Installing and removing the handles

Install the handles on the storage enclosure before you move the unit onto the lift tool. After you install the storage enclosure in the rack cabinet and remove the handles, store the handles for future use.

Installing the handles

Complete the following steps to install the handles on the storage enclosure:

1. Locate the box of handles.

34 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

2. To install a handle on the storage enclosure, place notch at the bottom of the handle in the opening in the storage enclosure chassis, and push the handle in and up until the latch at the top of the handle secures the handle to the chassis.

3. Repeat step 2 for the three remaining handles.

Removing the handles

Before you install the storage enclosure completely into a rack cabinet, you must remove the handles. Complete the following steps to remove the handles from the storage enclosure:

1. To remove a handle to the storage enclosure, release the latch with your thumb and pull down and away from the unit.

2. Repeat step 1 for the three remaining handles.

Handle

Thumb latch

3. Store the handles for future use.

Installing the DCS3700 into a rack

To install the storage enclosure, complete the following steps.

Note: For more information about how to use a lift tool, see the documentation that came with the lift

tool.

1. Prepare the storage enclosure for installation: a. Position the lift tool so that it is facing one side of the shipping box. b. Remove the foam shipping material from the sides and ends of the storage enclosure. c. If necessary, cut away sides of the shipping box so that the lift tool has access to the storage

enclosure.

d. Open the plastic bag and tuck it under the storage enclosure. The plastic bag reduces friction and

makes it easier to slide the unit off of the shipping box onto the lift tool, and off of the lift tool and into the rack cabinet.

e. Install the four handles on the sides of the storage enclosure. See “Installing and removing the

handles” on page 34 for detailed instructions.

Chapter 2. Installing the DCS3700 35

102 kg (225 lbs)

56.7 kg (125 lbs)

(12 x 5)

(60X)

Attention:

a. Because of the size and weight of the storage enclosure as shipped, a lift tool and a minimum of

two trained service technicians are required to push the enclosure out of its custom-designed package and onto the lift tool. For more information about the lift tool, see “Installation overview” on page 23.

b. Before you move or relocate a rack that contains DCS3700 storage enclosures, see “Relocating the

DCS3700” on page 65 for additional information.

2. With the help of a lift tool and a minimum of two trained service technicians, or a lift tool and professional movers, slide the storage enclosure off of the side of the shipping box and onto the lift tool. Align it in front of the rack.

3. Put the rear edge of the storage enclosure on the support rails.

4. Remove the two handles (one on each side) at the rear of the storage enclosure. Do not remove the

front handles on both sides of the unit.

5. Slide the storage enclosure halfway into the rack and remove the two handles (one on each side) at the front of the unit.

Rear

Front

6. Install and tighten two M5 screws on each side of the rack, above and below the top M5 screws, in the front of the storage enclosure to secure the storage expansion .

36 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

dcsq0003

7. Turn the rear-bracket thumbscrews to attach the rear brackets to the sides of the storage enclosure. The screw holes are located about 51 mm (2 in.) from the rack flange.

Note: To align the thumbscrews with the holes in the unit, you might need to loosen the screws that

attach the rear brackets to the rack cabinet.

8. Tighten all of the M5 screws to secure the rear bracket to the rack cabinet.

9. Continue with “Installing the drives.”

Installing the drives

Attention:

1. Potential damage to DDMs - Repeatedly turning the power off and on without waiting for the DDMs to spin down can damage them. Always wait at least 90 seconds from when you turn off the power until you turn it on again.

2. The installation order within each drawer is from left to right in rows. Slots 1, 4, 7 and 10 must have a drive installed in these locations to make sure there is sufficient air flow to the drives (see Figure 17 on page 38). To verify these slots, consult the overlay on the front of each of the five drive drawers. Make sure the four drives in each row are adjacent to each other. The long edge of each drive should touch the drive next to it. To maintain a uniform airflow across all drive drawers, the storage enclosure must be configured with a minimum of 20 drives, with four drives in the front row of each of the five drive drawers.

Chapter 2. Installing the DCS3700 37

Drive drawer

Drives

Figure 17. DCS3700 drive drawer with labeled disk drives

Notes:

1. The drive drawers are preinstalled in the DCS3700, but the DDMs are shipped separately from the drive drawers.

2. Make sure that you install the storage enclosure in the rack cabinet before you install DDMs in the storage enclosure.

Drive drawers

dcsq0004

To install the DDMs in the drive drawers, complete the following steps:

1. Open the two release levers on the drawer as shown in the illustration. Starting with the top drive drawer in the storage enclosure, pull the levers on each side of the drawer out and cam away from the chassis to release the drawer.

2. With the release levers fully extended, slide the drawer out until it is fully extended, but do not remove it from the enclosure.

3. Starting with the first DDM, raise the DDM handle to the vertical position.

38 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Drive drawer levers

dcsq0005

Latch

Slots

Raised buttons

4. Align the raised buttons on the sides with the matching slots in the DDM channel on the drawer.

Lower the DDM down onto the drawer, and rotate the DDM handle until the DDM snaps into place under the DDM release lever.

Notes:

a. If the DDM does not seem not fully seated into the drive connector on the disk drawer, apply

downward pressure to the rear of the drive as you install it.

b. If the storage enclosure is turned on, you must wait at least 90 seconds after you install each

DDM in the drive drawer. Otherwise, the storage enclosure might not recognize the new DDM, recognize the DDM as failed, or recognize the drive as incompatible. If this happens, unlatch the DDM, wait 90 seconds, and latch the DDM again.

5. Install the other DDMs in rows from left to right until the drive drawer has a minimum of four DDMs in the front row of the drive drawer.

6. Push the drive drawer into the storage enclosure until it clicks and close the levers on each side of the drawer.

Attention: Make sure you push both levers back against the drive drawer completely so that the drive drawer is closed. If the drive drawer is not completely closed, excess airflow through the unit might cause damage to the DDMs. If the drive drawer is not completely closed, you will not be able to open another drawer. If you try to force open another drawer, both drawers might be damaged.

7. Repeat steps 1 on page 38 through 6 for each drive drawer in the configuration.

8. Position the bezel in front of the storage enclosure as shown in the following illustration.

9. Align the tabs on the top and bottom of the bezel with the slots on the front of the storage enclosure,

and align the pins on the side of the bezel with the holes in the storage enclosure. Push the bezel into the front of the unit until the latches on both sides of the bezel lock it in place.

10. Continue with “Cabling the DCS3700 Storage System” on page 41.

Front bezel Latches

Chapter 2. Installing the DCS3700 39

40 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Chapter 3. Cabling the DCS3700

This chapter addresses the following cabling and configuration topics:

v “Enclosure ID Settings” on page 42 v “Cabling the DCS3700 Storage System” v “Installing SFP modules” on page 44 v “Removing SFP modules” on page 46 v “Handling fibre-optic cables” on page 47 v “Using LC-LC Fibre Channel cables” on page 48 v “Cabling the DCS3700 expansion enclosure” on page 51 v “Cabling the power supply” on page 65

Cabling the DCS3700 Storage System

The section provides information and instructions for cabling the DCS3700 storage system. After the storage subsystem is installed in its permanent location, you must cable it to hosts, expansion units, and other external devices, depending on your hardware configuration.

Controller connectors (with SAS host port adapters)

Figure 18 shows the optional SAS host port adapter installed in both controllers at the rear of the storage subsystem.

Figure 18. Dual-controller DS3700 storage subsystem ports and controllers (with an optional SAS host port adapter)

SAS Host port 1, 2, 3, and 4

The DCS3700 host ports are each a x4 multilane, 6 Gbps universal mini-SAS port. Connect a SAS cable from your host system SAS host bus adapter to a host port on each controller.

Drive expansion port

The drive expansion port is a x4 multilane SAS port. Connect a SAS cable to this port and to a drive expansion enclosure.

Controller connectors (with Fibre channel host port adapters)

Figure 19 shows the optional Fibre Channel host port adapter installed in both controllers at the rear of the storage subsystem.

Figure 19. Dual-controller DS3700 storage subsystem ports and controllers (with an optional Fibre Channel host port adapter)

SAS Host Ports 1 and 2

The DCS3700 SAS host ports are each a x4 multilane, 6 Gbps universal mini-SAS port. Connect a SAS cable from your host system SAS host bus adapter to a host port on each controller.

Fibre Channel Host Ports 3, 4, 5, and 6

Each Fibre Channel host port supports a small-form-factor pluggable (SFP) transceiver and is capable of operating at 8 Gbps, 4 Gbps, or 2 Gbps.

Drive expansion port

The drive expansion port is a x4 multilane SAS port. Connect a SAS cable to this port and to a drive expansion enclosure.

Enclosure ID Settings

The enclosure ID is a unique two-digit identifier for each enclosure in the storage subsystem configuration. In a dual controller or ESM configuration, both enclosure IDs are identical under normal operating conditions. Each DCS3700 storage system and DCS3700 expansion enclosure in the storage subsystem configuration must have a unique storage enclosure ID.

The controller automatically sets the enclosure ID. You can change the setting through the DS Storage Manager software, if necessary. The range of supported enclosure ID settings is 0 through 99. The enclosure ID is normally set to a value of 00 at the factory.

The enclosure ID is displayed on the seven-segment numeric display located on the back of each controller and ESM.

Working with SAS cables

Each storage controller has up to four x4 multilane SAS host ports and a single x4 multilane SAS port for drive channel connections.

42 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Use a 1M or 3M (1-meter or 3-meter) SAS cable with a mini-SAS 4x multilane SAS connector on each end to connect a controller host port to a host HBA and to connect the drive expansion port to an storage enclosure.

The following illustration shows the 1M and 3M mini-SAS cable.

Illustration of mini-SAS cable

Mini-SAS connectors

Figure 20. Mini-SAS cable

The 1M and 3M SAS cables have a universal key connector that enables the cable to be used in all mini-SAS ports.

Attention: To avoid damage to the SAS cables, consider the following precautions:

v When you route the cable along a folding cable-management arm, leave enough slack in the cable. v Route the cable away from places where it can be damaged by other devices in the rack. v Do not put excess weight on the cable at the connection point. Make sure that the cable is well

supported.

To connect a mini-SAS cable, insert the mini-SAS connector into a mini-SAS port. Make sure that it locks into place.

Illustration showing how to connect a mini-SAS cable

Figure 21. Connecting a mini-SAS cable

Chapter 3. Cabling the DCS3700 43

To remove a mini-SAS cable, complete the following steps:

1. Put one finger into the hole on the blue plastic tab on the mini-SAS connector and gently pull on the tab to release the locking mechanism.

Blue plastic tab

Figure 22. Removing a mini-SAS cable

2. As you pull on the tab, pull out the connector to remove it from the port.

Installing SFP modules

SFP modules convert electrical signals to optical signals that are required for fibre channel transmission to and from RAID controllers. After you install the SFP modules, you use fibre-optic cables to connect the DSC3700 storage system to hosts with FC host bus adapters or FC switches.

Important: IBM SFP options have been tested and approved for the IBM DS storage products. For

optimal performance and compatibility, always use IBM SFP options when installing the IBM DS products.

Before installing SFP modules and fibre-optic cables, read the following information: v Do not mix long-wave SFPs and short-wave SFPs on a single storage subsystem. Use either long-wave

SFPs or short-wave SFPs. You can use the DS Storage Manager client to view the storage subsystem profile in order to verify that you are not mixing long-wave and short-wave SFPs.

Attention: In addition, do not use long-wave SFPs in any of the FC ports in the FC drive loops. (Long-wave SFPs are not supported for use in the drive ports of storage expansion enclosures.)

v The SFP module housing has an integral guide key that is designed to prevent you from inserting the

SFP module improperly.

v Use minimal pressure when inserting an SFP module into an SFP port. Forcing the SFP module into a

port could cause damage to the SFP module or to the port.

v You can insert or remove the SFP module while the port is powered on. v The operational or redundant loop performance is not affected when you install or remove an SFP

module.

v You must insert the SFP module into a port before you connect the fibre-optic cable. v You must remove the fibre-optic cable from the SFP module before you remove the SFP module from

the port. Refer to “Removing SFP modules” on page 46 for more information.

v Make sure that you use the correct speed Fibre channel SFPs. There is no physical identification to

indicate the speed capability of an SFP other than the SFP label. Use the part number indicated on the SFP label to determine the speed capability of the SFP.

44 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Statement 3:

CAUTION: When laser products (such as CD-ROMs, DVD drives, fibre 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.

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 25.

Complete the following steps to install an SFP module:

1. Remove the SFP module from its static-protective package.

2. Remove the protective cap from the SFP module, as shown in Figure 23. Save the protective cap for

future use.

Wire

tab

Protective

cap

Figure 23. SFP module and protective cap

SFP

module

3. Remove the protective cap from the SFP port. Save the protective cap for future use.

4. Insert the SFP module into the host port until it clicks into place. See Figure 24 on page 46.

Chapter 3. Cabling the DCS3700 45

Wire

tab

Protective

cap

Figure 24. Installing an SFP module into the host port

SFP

module

5. Connect an LC-LC Fibre Channel cable. For information about the LC-LC cable, see “Using LC-LC Fibre Channel cables” on page 48.

Removing SFP modules

Complete the following steps to remove the SFP module from the host port:

Attention: To avoid damage to the cable or to the SFP module, make sure that 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 fibre-optic cables” on page 47.

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 25.

Wire

tab

Protective

cap

Figure 25. Unlocking the SFP module latch - plastic variety

SFP

module

v For SFP modules that contain wire tabs, unlock the SFP module latch by pulling the wire latch

outward 90°, as shown in Figure 26 on page 47.

46 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Wire

tab

Protective

cap

Figure 26. Unlocking the SFP module latch - wire variety

SFP

module

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

mini-hub port.

4. Replace the protective cap on the SFP module.

5. Place the SFP module into a static-protective package.

6. Replace the protective cap on the host port.

Handling fibre-optic cables

Important: IBM Fibre Channel (FC) cable options have been tested and approved for the IBM DS storage

products. For optimal performance and compatibility, always use IBM FC cable options when installing the IBM DS products.

Attention: To avoid damage to your fibre-optic cables, follow these guidelines: v For devices on slide rails, leave enough slack in the cables so they do not bend to a diameter of less

than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.), when extended or become pinched when retracted.

v Do not overtighten the cable straps or bend the cables to a diameter of less than 76 mm (3 in.), or a

radius less than 38 mm (1.5 in.).

v When storing excess or unused fibre-optic cables, do not bend the cables to a diameter of less than 76

mm (3 in.), or a radius less than 38 mm (1.5 in.) or wrap them around themselves. See Figure 27 on page 48.

v Loop diameter of 76 mm (3 in.) and bend radius of 38 mm (1.5 in.) for fibre optic cable are IBM

DCS3700 recommended minimums. Loops or bends smaller than this recommendation may cause damage to your fibre optic cables. It is best practice to use loop diameters and bend radii that are greater than these recommended minimums.

v Do not route the cable along a folding cable-management arm. v Route the cable away from places where it can be damaged by other devices in the rack cabinet. v Do not put excess weight on the cable at the connection point. Be sure that the cable is well supported. v Do not use plastic cable ties in place of the provided cable straps. v The following are the supported maximum cable lengths:

– 1 Gbps: 500 meters 50/125 um fibre, 300 meters 62.5/125 um fibre – 2 Gbps: 300 meters 50/125 um fibre, 150 meters 62.5/125 um fibre – 4 Gbps: 150 meters 50/125 um fibre, 70 meters 62.5/125 um fibre

Chapter 3. Cabling the DCS3700 47

ds470104

1.5 inch

(38 mm)

radius

3.0 inch (76 mm) diameter

Figure 27. Recommended bending and looping specifications for fibre-optic cables

Using LC-LC Fibre Channel cables

The LC-LC Fibre Channel cable is a fibre-optic cable that you use to connect into one of the following devices:

v An SFP module installed in an a DCS3700 fibre channel host interface adpater. v An SFP module installed in a fibre channel switch port or fibre channel host bus adapter port.

See Figure 28 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.

Figure 28. LC-LC Fibre Channel cable

48 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

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, fibre 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.

1. Read the information in “Handling fibre-optic cables” on page 47.

2. If necessary, remove the protective cap from the SFP module, as shown in Figure 23 on page 45. 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 29. Save the protective caps for future use.

Fibre-optic cable

Protective cap

Figure 29. Removing fibre-optic cable protective caps

4. Carefully insert this end of the LC-LC cable into an SFP module that is installed in the DCS3700. 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 30 on page 50.

Chapter 3. Cabling the DCS3700 49

Figure 30. 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 an SFP module that is installed in a separate DCS3700 or other DS5000 storage expansion enclosures.

Removing an LC-LC Fibre Channel cable

Complete the following steps to remove 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.

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 31.

Lever

Latches

Figure 31. 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 32 on page 51.

50 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figure 32. 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.

Cabling the DCS3700 expansion enclosure

The DCS3700 expansion enclosure is a dual ESM unit which provides additional storage capacity when attached to the DCS3700 storage system.

ESM connectors

The following illustration shows the connectors on the ESM.

SAS in connector 1 SAS in connector 2 SAS out connector

1 2

ESM

Figure 33. ESM connectors

SAS In connector 1

Connect a SAS cable to this connector and to either the drive expansion port on the DCS3700 controller or the SAS Out (↓) connector of another DCS3700 expansion enclosure.

SAS In connector 2

Connect a SAS cable to this connector and to either the drive expansion port on the DCS3700 controller or the SAS Out (↓) connector of another DCS3700 expansion enclosure.

SAS Out connector

Connect a SAS cable to this connector and to the SAS In (↑) connector of another DCS3700.

Note: Each ESM contains two SAS In connectors. You can use either SAS In connector but only one SAS

In connector can be used at a time.

Connecting the DCS3700 expansion enclosure

The DCS3700 storage system supports up to two DCS3700 expansion enclosures per physical expansion port, so multiple DCS3700 expansion enclosures can be connected by chaining them together.

To connect the DCS3700 storage system RAID controllers A and B to a single DCS3700 expansion enclosure, complete the following steps:

Chapter 3. Cabling the DCS3700 51

1. Connect the DCS3700 expansion enclosure to controller A: a. Connect one end of a SAS cable to the drive expansion port on controller A. b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in

SBB slot A in the DCS3700 expansion enclosure.

2. Connect the DCS3700 expansion enclosure to controller B: a. Connect one end of a SAS cable to the drive expansion port on controller B. b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in

SBB slot B in the DCS3700 expansion enclosure. Figure 34 on page 53 shows a DCS3700 storage system configured with a single DCS3700

expansion unit.

To connect the DCS3700 storage system RAID controllers A and B to multiple DCS3700 expansion enclosures, complete the following steps:

SBB slot A in the first DCS3700 expansion enclosure.

2. Connect the of the DCS3700 expansion enclosure to the next DCS3700 expansion enclosure in the chain:

a. Connect one end of a SAS cable to the Out (↓) SAS connector on the ESM located in SBB slot A of

the DCS3700 expansion enclosure that you just connected.

b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in

SBB slot A in the next DCS3700 expansion enclosure in the chain.

3. Connect the last DCS3700 expansion enclosure in the chain to controller B:

a. Connect one end of a SAS cable to the drive expansion port on controller B. b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in

SBB slot B in the last DCS3700 expansion enclosures of the chain that you created.

4. Connect the second DCS3700 expansion enclosure to the first DCS3700 expansion enclosure.

a. Connect one end of a SAS cable to the Out (↓) SAS connector on the ESM located in SBB slot B of

the second DCS3700 expansion enclosure.

b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in

SBB slot A of the first DCS3700 expansion enclosure. Figure 35 on page 54 shows a DCS3700 storage system configured with two DCS3700 expansion

units.

52 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figure 34. Single Expansion Enclosures

Chapter 3. Cabling the DCS3700 53

Figure 35. Dual Expansion Enclosures

54 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Redundant drive channel pair

Each storage controller on the DCS3700 storage system has a drive expansion channel that contains an x4 SAS port. The storage expansion enclosures that are connected to this connector form a drive channel. The maximum number of drives that can be installed in one drive channel is 180. In a dual-controller DCS3700, one drive channel from each controller combines to form a redundant drive-channel pair. If any component of the drive channel fails, the controllers can still access the storage enclosures in the redundant drive-channel pair.

Connecting secondary interface cables

This section applies to direct (out-of-band) management configurations only. If your configuration uses host-agent (in-band) management, skip this section. Use the Ethernet management port on the rear of the DCS3700 system storage controllers for direct management of the storage subsystems (see Figure 37 on page 57).

Important::

1. To minimize security risks, do not connect the DCS3700 to a public LAN or public subnet. Use a local private network for the DCS3700 and the storage management station Ethernet connectors.

2. For proper EMI shielding, always use quality braided and if necessary, shielded cables.

Connect an Ethernet cable from the management station to the Ethernet connector on controller A and controller B on the rear of the DCS3700 storage system.

Configuring the storage subsystem

After you install the DCS3700 storage system and DCS3700 expansion enclosures in a rack, it is necessary to configure the storage subsystem. Use the information in the following sections to configure your storage subsystem.

Storage subsystem management methods

Before you configure the storage subsystem, determine which method of storage subsystem management you want to use. You can manage the storage subsystems in either of two ways: host-agent (in-band) management or direct (out-of-band) management.

Note: For information about any in-band limitations or restrictions that are associated with particular

combinations of controller and host bus adapter, see the Storage Manager readme file.

For more information about setting up in-band or out-of-band management connections, see the DS Storage Manager 10 Installation and Host Support Guide for the operating system of the host server that you will use to manage the DCS3700 storage subsystem. The document is in the Documentation folder on the IBM Storage Manager v10.xx DVD.

Important:: If the operating system of the host server that the storage subsystem logical drives are

mapped to is not Microsoft Windows Server 2003 or Windows Server 2008, you must make a direct (out-of-band) management connection to the storage subsystem to set the correct host type first. Then, the server will be able to recognize the storage subsystem correctly for host-agent (in-band) management.

Host-agent (in-band) management method: This method requires that host-agent software be installed on the host server. The host-agent software enables the Storage Manager software client program to manage the storage subsystem by using the same connections between the host server and the storage subsystem. You must install at least one management station and a software agent host. The management station can be the host or a workstation on the Ethernet network. The client software is installed on the management station. The following illustration shows the host-agent (in-band) management method.

Chapter 3. Cabling the DCS3700 55

Figure 36. Host-agent (in-band) management

Direct (out-of-band) management method: This method uses Ethernet connections from a management station to each controller in the storage subsystem. You must install at least one management station. The management station can be the host or a workstation on the Ethernet network. The client software is installed on the management station. Attach Ethernet cables to each management station (one pair per storage subsystem). You will connect the cables to each storage system controller later when you install the storage subsystem. Figure 37 on page 57 shows the direct (out-of-band) management method.

Note: Do not connect the DCS3700 storage subsystem Ethernet ports to a public network or public

subnet. To minimize security risks, create a private network between the DCS3700 storage subsystem and the management station.

56 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figure 37. Direct (out-of-band) management method

Installing the storage subsystem configuration

Before attempting to attach hosts to the storage subsystem, make sure that the host systems and host bus adapters (HBAs) are installed correctly and updated with the latest firmware and drivers.

Notes:

1. See the documentation that comes with the HBA for installation requirements and procedures.

2. Use the correct HBA firmware and device driver. For the latest supported HBAs and device drivers,

consult the readme that comes with the DCS3700 controller firmware.

For a SAS attached host, attach a SAS cable to each HBA. Continue with “Connecting SAS hosts to the DCS3700” to connect the other end of each cable to a controller.

For a Fibre Channel attached host, attach a fibre channel cable to each HBA. Continue with“Connecting Fibre Channel hosts to the DCS3700” on page 60 to connect the other end of each cable to the controller.

Connecting SAS hosts to the DCS3700

The DCS3700 can support up to 28 hosts when attached to the SAS Connectivity Module for IBM BladeCenter and up to four hosts in a direct attached host environment. The number of supported hosts depends on the number of host ports installed on the controller. To protect against the loss of any one path from the host servers to the DCS3700 storage subsystem, use redundant host connections.

Note: The DCS3700 ships with eight storage partitions by default. For additional storage partitions,

purchase an optional Storage Partition Premium Feature upgrade. Contact your IBM reseller or marketing representative for more information.

To connect a SAS host bus adapter (HBA) to the storage subsystem, complete the following steps:

1. Connect a SAS cable from the controller A host port to the SAS HBA that is in the host.

Chapter 3. Cabling the DCS3700 57

2. Create a redundant host connection by connecting a second SAS cable from a second SAS HBA (or a second SAS port in the HBA) to a host port on controller B in the DCS3700 storage system.

The DCS3700 can support a maximum of two redundant host connections to a base DCS3700 storage system. With the optional 6Gbps 2 port host interface card installed in each controller, a maximum of four redundant host connection are supported.

See “Direct-attached dual-controller connections” for illustrations of host connections.

Direct-attached dual-controller connections: The following illustration shows a direct-attached connection from each controller to a single HBA in the same host (redundant host connection).

Figure 38. Dual-controller direct-attached Fibre Channel connection to two HBAs in the same host (redundant host connection)

58 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

The following illustration shows multiple redundant direct-attached SAS host connections. This configuration is also the configuration to use for a dual-node cluster configuration. Up to four hosts can be direct attached to the DCS3700 when the optional 6Gbps 2 port SAS host interface card is installed in each controller.

Figure 39. Dual-controller direct-attached Fibre Channel connections to multiple HBAs in multiple hosts

Overview of installing an IBM BladeCenter configuration to connect to a DCS3700

This section gives an overview and guidelines for installing an IBM BladeCenter configuration to connect to a DCS3700 storage system.

Before you install the BladeCenter configuration, consider the following information: v Make sure that the BladeCenter chassis, blade server, SAS connectivity module, and SAS expansion

card are supported. Go to http://www.ibm.com/systems/support/storage/ssic/interoperability.wss and check the System Storage Interoperation Center for details of the hardware supported by the DCS3700 storage system.

v Make sure that an Advanced Management Module is installed in the BladeCenter chassis. The latest

level of management-module firmware is available at http://www.ibm.com/bladecenter/.

v For the latest SAS connectivity module firmware, SAS expansion card firmware, blade server BIOS

code, and device drivers, see http://www.ibm.com/systems/support/.

Installing the BladeCenter configuration

To install the IBM BladeCenter SAS Expansion Card (CFFv), IBM BladeCenter SAS Connectivity Module, and blade server, complete the following general steps:

1. Install an IBM BladeCenter SAS Expansion Card (CFFv) in each blade server that you want to connect to the DCS3700. See the documentation that comes with the SAS expansion card for installation requirements and procedures.

2. Install the blade servers in the BladeCenter chassis. See the documentation that comes with the blade server for installation requirements and procedures.

Chapter 3. Cabling the DCS3700 59

3. Install the IBM BladeCenter SAS Connectivity Modules in the I/O bays in BladeCenter unit. See the documentation that comes with the SAS connectivity modules for installation requirements and procedures.

4. Go to “Connecting BladeCenter hosts to the DCS3700.”

Connecting BladeCenter hosts to the DCS3700

The dual-controller DCS3700 comes with two SAS host connectors on each controller, enabling up to 28 blade servers in two BladeCenter units to be redundantly connected to the storage subsystem.

To protect against the loss of any one path from the host blade servers to the DCS3700, use redundant host connections.

To connect a SAS expansion card that is installed in a blade server to the DCS3700, complete the following steps:

1. Connect a SAS cable from the SAS host connector on the DCS3700 storage system to any SAS port on an IBM BladeCenter SAS Connectivity Module that is installed in a BladeCenter unit (port 3 is recommended).

2. To create a redundant host connection, connect a SAS cable from a second SAS connectivity module to a host connector on the other controller in the DCS3700. You can only create a maximum of two redundant host connections in a dual-controller DCS3700, one connection each from the blade center to the DCS3700 controller host port as shown in Figure 40.

Attention:: You can connect only one DCS3700 to the BladeCenter SAS Connectivity Module. No other

external devices can be connected to the SAS connectivity module.

Figure 40. Example of DCS3700 connected to a single BladeCenter unit

Connecting Fibre Channel hosts to the DCS3700

Using Fibre Channel switches, up to 128 hosts can be redundantly attached to the DCS3700 storage subsystem in a Fibre Channel storage area network (SAN) fabric.

60 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Notes:

1. The DCS3700 ships with eight storage partitions by default. For additional storage partitions, purchase an optional Storage Partition Premium Feature upgrade. Contact your IBM reseller or marketing representative for more information.

2. Installation of the optional 8Gbps 4 port Fibre Channel host interface card is required in both controllers in order to support fibre channel host connections.

To connect a fibre channel host to the controllers, complete the following steps:

1. Install SFP modules in the host ports on controllers A and B.

2. Connect the Fibre Channel cables to the SFP modules in the controller host ports and to either the SFP

modules in the Fibre Channel switch or the optical interface connector on the host bus adapters.

3. Repeat steps 1 and 2 for an additional redundant host connection. In a direct connection configuration, you can create a maximum of four redundant host connections for the storage subsystem.

See “Direct-attached dual-controller connections:” and “SAN fabric dual-controller, redundent connections” on page 63for illustrations of host connections.

Direct-attached dual-controller connections:

The following illustration shows a direct-attached connection from each controller to a single HBA in the same host (redundant host connection).

Chapter 3. Cabling the DCS3700 61

Figure 41. Dual-controller direct-attached Fibre Channel connection to two HBAs in the same host (redundant host connection)

The following illustration shows multiple redundant direct-attached host connections.

Figure 42. Dual-controller direct-attached Fibre Channel connections to multiple HBAs in multiple hosts

62 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

SAN fabric dual-controller, redundent connections

The following illustrations show a redundant SAN fabric, fibre channel connection from each controller to multiple HBAs in the same host (redundant host connection).

The Fibre Channel switches are connected together through the Inter-Switch Link (ISL) to form a single SAN fabric.

Figure 43. Example of a single Fibre Channel SAN fabric configuration

In the following illustration, the Fibre Channel switches are not connected together through an ISL. Each switch forms its own SAN fabric. This configuration is also the configuration to use for a dual-node cluster configuration.

Chapter 3. Cabling the DCS3700 63

Figure 44. Example of a dual Fibre Channel SAN fabric configuration

In the following illustration, the Fibre Channel switches are not connected together. Each switch forms its own SAN fabric.

Figure 45. Example of two storage subsystems in a dual Fibre Channel SAN environment

64 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

The following illustration shows an example of a multiple-host, multiple-port, and multiple-fabric (Fibre Channel and SAS) configuration

Figure 46. Example of a multiple-host, multiple-port, and multiple-fabric (Fibre Channel and SAS) configuration

Note: The DCS3700 does not support a multiple-fabric (Fibre Channel and SAS) configuration where

both fibre channel and SAS host adapter are located in the same host system.

Cabling the power supply

Complete the following steps to connect the power supply cable.

Attention: The DCS3700 requires 200-240V AC power. Make sure that it is connected only to the correct AC supply voltage. If there are multiple DCS3700 units to be connected, check the AC source and the rack Power Distribution Unit current ratings to make sure that they are sufficient to support the DCS3700 operating and surge current requirements.

1. Using the strap that comes off the power supply, tie the power supply cord to the strap to provide strain relief and to prevent the power cord from accidently being unplugged.

2. Connect the power cable to the power supply.

3. Continue with “Powering on the DCS3700” on page 68 for the initial startup of the storage expansion

enclosure.

Relocating the DCS3700

Before you move an DCS3700 with populated hard drive drawers, either by itself or as part of the rack that it is mounted in, you must obtain a rack relocation kit. Follow the instructions provided with the relocation kit to avoid potential damage to the DCS3700:

v You must remove the drives from the DCS3700 and place them in the boxes that come with the

relocating kit.

v You must label the drives using the labels that come with the relocating kit. v A lift tool must be used if the DCS3700 is going to be removed from the rack.

Chapter 3. Cabling the DCS3700 65

66 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Chapter 4. Operating the DCS3700 storage system and expansion enclosure

This chapter describes operating procedures for the DCS3700 storage system and expansion enclosure.

To ensure optimal operation of your DCS3700 storage system and expansion enclosure, see “Best practices guidelines” on page 5.

Performing the DCS3700 Health Check process

Use the health check process to help you verify and maintain the optimal performance of the storage configuration. The information that you collect in these steps also helps provide IBM Service with important information that is needed during a service call.

Perform the following health check tasks after the initial configuration of the storage subsystem and after all configuration sessions.

1. Monitor the Recovery Guru in the Storage Manager software for any obvious storage subsystem errors or problem conditions.

2. Gather and save the following storage subsystem event logs for review by IBM Service. These event logs should be gathered periodically for regular health check monitoring regardless of the state of the Recovery Guru. (You can collect all these logs at once and compress them into a single file by clicking the Support tab and then Gather Support Information in the Subsystem Management window.)

v DCS3700 storage subsystem management event log (MEL) v Storage Subsystem Profile or DCS3700 Profile v SAS PHY error log

In addition, you should also collect event logs for the host servers that have mapped logical drives from the storage subsystem.

Attention: Save these event-log files to a server disk that will remain accessible in the event of a DCS3700 storage configuration failure. Do not save these event log files only to a LUN in the DCS3700 storage subsystem.

3. Use the Storage Subsystem Profile or DCS3700 Profile to make sure that the following firmware levels are at the latest versions:

v Controller firmware v ESM firmware v Drive firmware

If the firmware is not up-to-date, upgrade the firmware and software to the latest level that is applicable to the storage configuration. See “Software and hardware compatibility and upgrades” on page 15 for information about where to find the latest firmware and software.

Attention: You must resolve Recovery Guru errors or problems before you upgrade firmware. Save the storage subsystem profile before you perform any controller or ESM firmware upgrades.

Save the storage subsystem profile and all .cfg files to a server disk that will remain accessible in the event of a DCS3700 storage configuration failure.

4. Use the Storage Subsystem Profile or DCS3700 Profile to make sure that the following functions are enabled:

v For the DCS3700, enable Media Scan both at the controller level and at the LUN level. v For the DCS3700, enable the read/write cache. In addition, use the Storage Subsystem Profile to

make sure that cache is matched between the controllers.

Set a regular schedule of periodic health check evaluations to keep the firmware levels current and to preserve optimal data access and performance.

Hardware inspection

In addition to the health check process, regular hardware inspection and maintenance helps to support the optimal performance of the storage configuration. Periodically inspect the components of the storage configuration.

For best results, follow these guidelines: v Maintain an up-to-date storage subsystem profile for the storage configuration. Save the profile to a

server disk that will remain accessible in case of a DCS3700 storage configuration failure. Do not save the profile only to a LUN in the storage subsystem.

v Develop a change-management plan. The plan should include schedules for updating subsystem

firmware and server host software.

Note: Some updates might require storage subsystem downtime.

v Use applicable IBM-approved cables for all situations. Note in the configuration documentation

whether any cables are not IBM-approved.

v Create and maintain a cabling diagram of the current configuration. Keep this diagram updated as you

make configuration changes, and keep the cabling diagram available for review.

v Create and maintain a list of other components that are being used within the cabling diagram (such as

the host system and other attached devices).

v Make sure that all controllers and ESMs are correctly seated. v Make sure that all drives are correctly seated. v Make sure that cables are managed correctly. v Ensure proper air flow and temperature for all components in the storage configuration.

You can find details about many of these inspection and maintenance responsibilities in other sections of this document.

In addition to these inspection and maintenance responsibilities, conduct training for staff that support storage configurations. Although training is not a part of the health check process, training reduces the potential for configuration problems and contributes to the correct operation of the system.

Powering on the DCS3700

This section contains instructions for turning on the storage subsystem under normal situations. “Turning off the storage subsystem” on page 83 contains instructions for turning off the storage subsystem under normal and emergency situations. When you turn on and turn off the storage subsystem, be sure to use the startup sequence that is described in this section. If you are turning on the storage subsystem after an emergency shutdown or power outage, see “Restoring power after an unexpected shutdown” on page 85.

The following procedure addresses two situations:

v The entire storage subsystem has been shut down (the main circuit breakers for the rack are off). v Some storage enclosures are being powered-on while others remain online (the main circuit breakers

for the rack are on). You might encounter this if you are adding an expansion enclosure to increase storage capacity.

68 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Attention:

1. Repeatedly turning the power off and on without waiting for the drives to spin down can damage the drives. Always wait at least 90 seconds after you turn off the power before you turn it on again.

2. If you are connecting a power cord to a storage subsystem enclosure, turn off the power switches first. If the main circuit breaker is off, make sure that both power switches are off on each storage enclosure in the rack before you turn on the main circuit breakers.

3. Turn on the power to the supporting devices (for example, Ethernet switches and management stations) before powering on the storage subsystem enclosures.

1. Are the main circuit breakers turned on? – Yes: Turn off both power switches on each enclosure that you intend to connect to the power. – No: Turn off both power switches on all enclosures in the storage subsystem.

2. Make sure that all power cords are connected.

Note: If the power cords are not connected, turn off both power switches on all modules in the

configuration before you connect power cords or turn on the main circuit breakers.

3. If the main circuit breakers are turned off, turn them on. Attention: You must turn on power to each attached expansion enclosure before you turn on

power to the storage system so that the controllers recognize all drives in the configuration during the startup process.

4. Depending on the number of storage enclosures in the configuration, the storage subsystem might take up to 10 minutes to fully power-on. While each storage enclosure powers-on, the green and amber LEDs on the front and rear of the storage enclosure turn on and off intermittently. The cache battery backup self-test might take up to an additional 15 minutes to be completed. During this time, the LEDs on the front and rear of the storage subsystem might flash intermittently.

Check the LEDs on the front and rear of all the storage enclosures. Make sure that no amber LEDs are lit on any of the storage enclosures.

Power connector

Power switch LEDs

Lnk Lnk Lnk Lnk

8 8

Lnk Lnk Lnk Lnk

8 8

ACDC

ID/Diag

ACDC

Power supply A

Lnk Lnk

Power supply B

dcsi0004

Figure 47. Power-supply switches and connectors for DS3500 dc models

5. Determine the status of all the components in the storage subsystem configuration by completing the following steps:

a. Check all LEDs on each component in the DCS3700 expansion enclosures. Make sure that all the

LEDs show normal status. For more information about LED status for expansion enclosures, see “Checking the LEDs” on page 73.

b. Check all LEDs on each component in the DCS3700 storage system. Make sure that all the LEDs

show normal status. For information about LED status, see “Checking the LEDs” on page 73 or “Solving problems” on page 129.

Chapter 4. Operating the DCS3700 storage system and expansion enclosure 69

c. Open the Storage Manager Subsystem Management window, and display the status of the

storage subsystem.

6. Are the LEDs indicating normal operation, and is the Storage Manager GUI status Optimal on all the configuration components?

– Yes: The procedure is complete. – No: Go to step 7.

7. Diagnose and correct the fault by completing the following steps: a. Run the Storage Manager Recovery Guru by clicking Recovery Guru in the Subsystem

Management window toolbar.

b. Complete the recovery procedure.

If the Recovery Guru directs you to replace a failed component, use the individual LEDs on the storage subsystem to locate the specific failed component. For troubleshooting procedures, see “Solving problems” on page 129.

c. When the recovery procedure is completed, select Recheck in the Recovery Guru. This action

runs the Recovery Guru again to make sure that the problem is corrected.

d. If the problem remains, contact your IBM technical-support representative.

Installing the Storage Manager Client

See the DS Storage Manager 10 Installation and Host Support Guide for the applicable operating system for instructions for installing the Storage Manager software. The document is in the Documentation folder on the IBM Support Software DVD. Use that document and the online help to configure the arrays, logical drives, and host partitions for the controllers. Follow the instructions in the operating-system documentation to make the new logical drives accessible to the operating system. Do not proceed with the configuration setup until you have completed the Storage Manager installation.

Assemble any additional items in preparation for software installation. These items might include the following items:

v HBA device drivers v Controller firmware v IP addresses for controllers (for out-of-band management only) v Additional documentation for hosts, HBAs, and other storage components.

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 DS Storage Manager 10 Installation and Host Support Guide for the operating system. Save the profile in a location other than the logical drives that are created for the storage subsystem.

Always see the readme file that is included with the DCS3700 storage subsystem firmware package (whether the firmware is accessed by the Web or a DVD) for any special requirements or restrictions that apply to that firmware version.

Note: Be sure to install the Storage Manager event monitoring service to enable continuous monitoring of

the status of the storage subsystem. For more information about the importance of this information, see “Monitoring status through software” on page 71.

70 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Monitoring status through software

Use the Storage Manager software to monitor the status of the storage subsystem. Run the software constantly, and check it frequently.

Note:

1. You can monitor only storage subsystems that are within the management domain of the storage-management software.

2. If you have not installed the Storage Manager Event Monitor service as part of the storage-management software installation, the Storage Manager Enterprise Management window must remain open. (If you close the window, you will not receive any alert notifications from the managed storage subsystems.)

For more information, see the Enterprise Management online help.

Important: See the DS Storage Manager 10 Installation and Host Support Guide for the applicable operating

system for instructions for installing the Storage Manager software. The document is in the Documentation folder on the IBM Support Software DVD.

To download the latest version of the Storage Manager software, controller firmware, NVSRAM firmware, and the latest ESM firmware, go to http://www.ibm.com/servers/ storage/support/disk/.

The Storage Manager software provides the best way to diagnose and repair storage-subsystem failures. The software can help you:

v Determine the nature of the failure v Locate the failed component v Determine the recovery procedures to repair the failure

Amber (needs attention) LEDs do not necessarily indicate which component has failed or must be replaced or which type of recovery procedure you must perform. In some cases (such as when a drive exceeds its Predictive Failure Analysis [PFA] threshold), the amber LED is not lit. Only the Storage Manager software can detect the failure.

For example, the recovery procedure for a PFA flag (impending drive failure) on a drive varies depending on the drive status (hot spare, unassigned, RAID level, current logical drive status, and so on). Depending on the circumstances, a PFA flag on a drive can indicate a high risk of data loss (if the drive is in a RAID 0 volume) or a minimal risk (if the drive is unassigned). Only the Storage Manager software can identify the risk level and provide the necessary recovery procedures.

Note: For PFA flags, the system-error LED and drive status LEDs are not lit, so checking the LEDs will

not notify you of the failure, even if the risk of data loss is high.

Recovering from a storage subsystem failure might require you to perform procedures other than replacing the component (such as backing up the logical drive). The Storage Manager software provides these procedures.

Attention: Not following the software-recovery procedures can result in data loss. In addition, always replace a failing component as soon as possible to minimize additional failures that might occur, causing loss of data access.

Chapter 4. Operating the DCS3700 storage system and expansion enclosure 71

Firmware updates

Attention: Save the storage subsystem profile before you perform any controller or ESM firmware upgrades. Save the profile and all configuration (.cfg) files to a server disk that will remain accessible in the event of a DCS3700 storage configuration failure. Do not save these files only to a LUN in the storage subsystem.

To ensure the optimal operation of the storage subsystem and its attached storage enclosures, the ESM firmware, controller firmware, drive firmware, and the NVSRAM firmware must be up-to-date. Go to http://www.ibm.com/servers/storage/support/disk/ to get the latest updates.

Always see the readme files that are included with the firmware packages for the most up-to-date information about firmware prerequisites, firmware update instructions, download-sequence information, and host I/O restrictions, if any. Apply the necessary updates before you configure the storage subsystem arrays and logical drives. Subscribe to My Support for automatic notifications of firmware or Storage Manager software updates or any important information about the DCS3700 storage subsystems (see “Receiving product updates and support notifications” on page 5).

Attention: Failure to observe the limitations, prerequisites, sequences, and dependencies in the readme file might result in a loss of data access.

Unless the readme file contains special requirements for the sequence in which you upgrade firmware, perform firmware upgrades in the following sequence:

1. ESM firmware for the expansion enclosures

2. Controller firmware

3. Controller NVSRAM

4. Drive firmware

Troubleshooting the storage subsystem

The Storage Manager software is the best way to monitor the storage subsystem, diagnose a problem, and recover from a hardware failure. Run the Storage Manager software continuously, and frequently check the configuration status.

To check the status of and identify a problem with the storage subsystem, complete the following steps. If a problem has occurred, use the Storage Manager software and the LEDs on the storage subsystem to help locate a failed component.

1. Open the Subsystem Management window.

2. Click the Summary tab, and view the status of the storage subsystem.

3. Does any storage subsystem have a Needs Attention status?

v Yes: Go to step 4. v No: All components are Optimal. Go to step 5.

4. Click Recovery Guru on the toolbar. Perform the procedure in the Recovery Guru to correct the problem. The Recovery Guru might direct you to replace the failed component. If so, go to step 5.

Attention: If the fault requires you to power-off an enclosure in your storage subsystem, you might have to cycle the power on the DCS3700 storage system and all remaining expansion enclosures that are part of the storage subsystem. Contact your IBM technical-support representative before you power-off any other component of the storage subsystem.

5. Check the LEDs on the front and the rear of the storage enclosure. A green LED indicates a normal status; an amber LED indicates a hardware fault.

6. Is an amber LED lit?

v Yes: Locate and troubleshoot the failed components. See “Checking the LEDs” on page 73.

72 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

v No: You are finished with this procedure. If you are still experiencing a problem with the storage

subsystem, create, save, and print a storage subsystem profile, and contact your IBM technical-support representative for assistance. When the recovery procedure is completed, select Recheck in the Recovery Guru to run the Recovery Guru again to make sure that the problem is corrected.

Checking the LEDs

The LEDs indicate the status of the storage subsystem and components. Green LEDs indicate a normal operating status; amber LEDs indicate a possible failure; a blue LED on a component indicates that it is safe to remove the component.

The DCS3700 also has a blue system locator LED that is lit when the menu function is selected in the Subsystem Management window, causing the Locate command to be sent to the DCS3700.

Check all the LEDs on the front and rear of the storage subsystem when you turn on the power. During power-on, the LEDs flash intermittently as the storage subsystem and components complete the power-on process. In addition to checking for faults, you can use the LEDs on the front of the storage subsystem to determine whether the drives are responding to I/O transmissions from the host.

Front LEDs

This section describes the primary LEDs and controls on the front of the DCS3700.

The front LEDs and controls for the DCS3700 storage system or expansion unit is shown in Figure 48.

Figure 48. DCS3700 front LEDs and controls

Figure 49. DS3524 storage subsystem and EXP3524 storage enclosure front LEDs

1 Power-on LED (green)

LED is lit, it indicates that the power supply is turned on and is supplying both 5-volt and 12-volt dc power.

2 Standby power LED (green)

Future use only.

3 System locator LED (blue)

This blue LED can be lit by the Storage Manager software to aid in visually locating the storage subsystem.

4 Overtemperature LED (amber)

When this amber LED is lit, it indicates that the storage subsystem is in an over temperature condition.

Chapter 4. Operating the DCS3700 storage system and expansion enclosure 73

5 System error LED (amber)

When this amber LED is lit, it indicates that the unit has a fault, such as in a power supply, controller, or drive.

Controller LEDs

This section describes the controller LEDs on the rear of the storage subsystem.

Figure 50. Controller LEDs

Ethernet speed LED

When this LED is lit, it indicates that the Ethernet speed between the controller and the management workstation is 1000 Mbps. When this LED is off, it indicates that the Ethernet speed is 100 Mbps.

Ethernet activity LED

When this LED is lit, it indicates that the link is established between the controller and the management workstation. When this LED is flashing, there is activity between the controller and the management workstation. When this LED is off, no link is established between the controller and the management workstation.

SAS link service action LED (amber)

When this LED is lit, it indicates a problem with the SAS link that requires service action. The normal condition of this LED is off.

SAS link up LED (green)

When this LED is lit, it indicates that the link is established between the controller and a host. When this LED is flashing, it indicates activity on the link. When this LED is off, no link is established.

Cache active LED (green)

When this LED is lit, it indicates that battery backup has been enabled and data is in the memory cache. When this LED is blinking, cache offload is in process. When this LED is off, caching is turned off and no data is in the memory cache.

Fault LED (amber)

When this LED is lit, it indicates that a fault has occurred in the controller and the controller must be replaced. The normal condition of this LED is off.

OK to remove LED (blue)

When this LED is lit, it indicates that it is safe to remove the controller from the DCS3700; no activity is taking place, and no data remains in the memory cache. The normal condition of this LED is off.

74 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Battery charging LED (green)

When this LED is lit, the battery is fully charged. When this LED is blinking, the battery is charging. When this LED is off, the battery either failed or has been removed from the controller.

Battery fault LED (amber)

When this LED is lit, it indicates that the battery fails to hold a charge and should be replaced. The normal condition of this LED is off.

If the optional Fibre Channel host port adapter is installed in the controller, the host port adapter contains four additional Fibre Channel host connectors with LEDs.

Figure 51. Fibre Channel host port adapter LEDs

Fibre Channel speed LEDs 2 Gbps and 4 Gbps

These LEDs in combination indicate the speed of the Fibre Channel host port.

Table 13. Fibre Channel port LEDs

2 Gbps LED 4 Gbps LED Host port speed

On Off 2 Gbps Off On 4 Gbps On On 8 Gbps Off Off No SFP module is present or the SFP module is

faulty

If the optional SAS host port adapter is installed in the controller, the host port adapter contains two additional SAS host connectors with LEDs.

SAS link service action (amber)LED

SAS link up LED

Figure 52. SAS host port adapter LEDs

SAS link service action LED (amber)

When this LED is lit, it indicates a problem with the SAS link that requires service action. The normal condition of this LED is off.

Chapter 4. Operating the DCS3700 storage system and expansion enclosure 75

SAS link up LED (green)

ESM LEDs

This section describes the ESM LEDS. Figure 53 shows the LEDs on the ESM.

Link fault LED (amber)

1 2

ESM

OK to remove LED (blue)

Figure 53. ESM LEDs

Fault LED (amber)

Power-on LED (green)

Link fault LED (amber)

When this amber LED is lit, it indicates that the link through the SAS cable is not successful.

Link up LED (green)

When this green LED is lit, it indicates that the link through the SAS cable is successful.

OK to remove LED (blue)

This LED is supported only when the EXP3500 is attached to a DS3500 controller. Do not remove the ESM unless this blue LED is lit.

Fault LED (amber)

When this amber LED is lit, it indicates that the ESM has failed.

Link up LED (green)

Seven-segment numeric display

Link fault LED (amber)

Link up LED (green)

Power-on LED (green)

When this green LED is lit, it indicates that the ESM is receiving power.

Fan assembly LEDs

This section describes the storage expansion enclosure fan assembly LEDs.

76 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

Figure 54. Fan assembly LEDs

Table 14. Fan assembly LEDs

Number LED Normal Status Problem Status

1 Power

On (Green) Off: No power to fan assembly

2 Service Action Required (Fault)

3 Service Action Allowed

Off On (Amber): A fault exists within

Off On (Blue): The fan assembly can

AC power-supply LEDs

This section describes the primary LEDs on the DCS3700 ac power supplies.

Figure 55. AC power-supply LEDs

1 Standby power LED (green)

Future use only.

ACDC

dcs00010

the fan assembly

be removed

2 DC power LED (green)

When this green LED is lit, it indicates that the DCS3700 is turned on and is supplying 5-volt, 12-volt, and 48-volt dc power.

3 Service Action Allowed LED (blue)

When this blue LED is lit, it indicates that it is safe to remove the power supply.

Chapter 4. Operating the DCS3700 storage system and expansion enclosure 77

4 Fault LED (amber)

When this amber LED is lit, it indicates that a power supply or fan has failed or that a redundant power supply is not turned on.

5 AC power LED (green)

When this green LED is lit, it indicates that the storage subsystem is receiving ac power.

Drive drawer LEDs

This section describes the LEDs on storage expansion enclosure drive drawers.

Drive drawer levers

Figure 56. Drive drawer LEDs

Table 15. Drive drawer LEDs

Number LED Normal Status Problem Status

1 Service Action Allowed

2 Service Action Required (Fault)

Off On (Blue): The drive drawer can

Off On (Amber): A fault exists within

be removed

The drawer Service Action Allowed LED is also lit when a Service Action Allowed LED on one of the drives in the drawer is lit.

the drive drawer

dcsi0008

3 - 14 Drive Activity (for drives 1 to 12

in the drawer)

Note: The associated disk drive is indicated by a number (1 to 12) that is displayed inside the Drive Activity icon.

On (Green): Power is on, drive is operating normally

Blinking (Green): Indicates drive I/O activity

Off: No power to the drive or a drive is not installed

Disk drive LEDs

This section describes the service LEDs on the disk drives. The drive power/drive activity LEDs are located on the front of the drive drawer. See “Drive drawer LEDs” for more information.

78 IBM System Storage DCS3700: Installation, User, and Maintenance Guide

IBM System Storage DCS3700 Installation, User's, And Maintenance Manual

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