HP StorageWorks 7110, StorageWorks 7410 Service Manual

User and

Service

Guide

HP StorageWorks

Virtual Arrays

VA 7000 Family

Edition January 2005

Part number A6183-96008

Printed in U.S.A.

Notice

Trademark Information

© Copyright 2000-2005 Hewlett-Packard
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to change without notice.

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2

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Revision History

January 2002

Change Page

Added new supported non-native operating systems. 16

Added Operating Tips section. 57

Clarified explanation of redundancy groups 39

Expanded the procedure for upgrading DIMMs. 135

Added procedure for reducing the amount of cache. 136

March 2002

Change Page

Updated warranty information 7

Added information on new power supply model 102

Added information on new disk filler panel. 100

Added a procedure for adding a disk enclosure to a VA 7400. 132

April 2002

Change Page

Added new warning LED status display for updating battery firmware. 82

Added processor model to array controller description 24

Changed part numbers of replacement array enclosure controllers. 93

Added support for DS 2405 Disk System Multiple

Added information for identifying type of disk enclosure 92

Added DS 2405 Disk System part numbers to disk enclosure
replaceable parts.

Added step for setting FC Loop Speed switch on DS 2405 LCCs. 127

Added note on ensuring controller firmware is HP14 or later when
adding a DS 2405 Disk System to the array.

95

132

3

July 2002

Change Page

Updated product information to include VA 7410. 13

Added VA 7410 back-end cabling. 33

Added "Data I/O Architecture" information. 52

Updated replaceable parts to include VA 7410 components 93

Updated procedure for adding a disk enclosure to include VA 7410. 132

January 2003

Change Page

Updated capacity and performance tables for VA 7110. 17

Added 73 GB 15K disk module and 146 GB disk module for support

26

on VA 7110 and 7410.

Updated Data Storage Process information 38

Updated configuration drawings. 59

Added VA 7110 LED displays. 81

Added VA 7110 controller to replaceable parts. 93

September 2003

Change Page

Updated VA 7110 DIMM configuration information to indicate that
512 MB is not supported.

14, 136

4

March 2004

Change Page

Added a step to the controller installation procedure for recognizing

110

the new controller on HP-UX.

Added note regarding installing multiple disks. 132

Added information on replacing a controller in a single-controller

112

array.

January 2005

Change Page

Added Japanese power cord statement. 148

5

About This Guide

This guide is intended for use by information technology (IT), service, and other personnel involved in
managing, operating, servicing, and upgrading the HP StorageWorks Virtual Array products. It is
organized into the following chapters:

Chapter 1. Product Overview Describes the features, controls, and operation of the

disk array.

Chapter 2. System Configurations Guidelines for designing array configurations for

different system requirements.

Chapter 3. Troubleshooting Instructions for isolating and solving common problems

that may occur during array operation

Chapter 4. Servicing & Upgrading Instructions for removing and replacing all field

replaceable units.

Chapter 5. Specifications & Regulatory
Statements

Product dimensions, weight, temperature and humidity
limits, shock and vibration limits, electrical and power
specifications, regulatory and safety statements, and
Declaration of Conformity.

Related Documents and Information

The following items contain information related to the installation, configuration, and management and
of the HP StorageWorks Virtual Array products:

—

HP StorageWorks Virtual Array 7000 Family Installation Guide

for installing and configuring the hardware and software components of the HP StorageWorks
Virtual Array products.

—

HP StorageWorks Virtual Array Family Rack Installation Guide

for installing the HP StorageWorks Virtual Array products into HP Rack System/E, HP System
racks, and Compaq 9000 racks.

—

HP StorageWorks CommandView SDM Installation and User Guide

use the HP StorageWorks CommandView SDM software and its associated utilities to configure,
manage, and diagnose problems with the array.

- includes step-by-step instructions

- includes step-by-step instructions

- describes how to install and

6

Warranty Information

Standard Limited
Warranty

Warranty Contacts
U.S. and Canada

Current Support
Information

Preparing for a
Support Call

The HP SureStore Virtual Array Family standard warranty includes the following:
Two-year, same-day on-site warranty (parts and labor). Same-day response

equates to:
4-hour response, available normal business days (Monday-Friday) 8 am - 5 pm.
See the "Hewlett-Packard Hardware Limited Warranty" on page 8 for a complete

description of the standard warranty.

For hardware service and telephone support, contact:
An HP-authorized reseller or
HP Customer Support Center at 970-635-1000, 24 hours a day, 7 days a week,

including holidays

For the latest support information, visit the following web site:

http://www.hp.com/support/va7100
http://www.hp.com/support/va7400
http://www.hp.com/support/va7410
http://www.hp.com/support/va7110

If you must call for assistance, gathering the following information before placing
the call will expedite the support process:

— Product model name and number
— Product serial number
— Applicable error messages from system or diagnostics
— Operating system type and revision
— Applicable hardware driver revision levels (for example, the host

adapter driver)

7

Hewlett-Packard Hardware Limited Warranty

HP warrants to you, the end-user Customer, that HP SureStore Virtual Array Family hardware
components and supplies will be free from defects in material and workmanship under normal use after
the date of purchase for
warranty period, HP or Authorized Reseller will, at its option, either repair or replace products that prove
to be defective. Replacement parts may be new or equivalent in performance to new.

Should HP or Authorized Reseller be unable to repair or replace the hardware or accessory within a
reasonable amount of time, Customer's alternate remedy will be a refund of the purchase price upon
return of the HP SureStore Virtual Array Family.

two years

. If HP or Authorized Reseller receives notice of such defects during the

Replacement Parts
Warranty

Items Not Covered

HP replacement parts assume the remaining warranty of the parts they replace.
Warranty life of a part is not extended by means of replacement.

Your HP SureStore Virtual Array Family warranty does not cover the following:

— Products purchased from anyone other than HP or an authorized

HP reseller

— Non-HP products installed by unauthorized entities
— Customer-installed third-party software
— Routine cleaning, or normal cosmetic and mechanical wear
— Damage caused by misuse, abuse, or neglect
— Damage caused by parts that were not manufactured or sold by

HP

— Damage caused when warranted parts were repaired or replaced

by an organization other than HP or by a service provider not
authorized by HP

8

Warranty Information 6

Hewlett-Packard Hardware Limited Warranty 7

1 Product Overview 13

Supported Operating Systems 16
Array Management Software 16
Product Features 17

Controller Enclosure Components 19

Array Controller 24
Array Controller Filler Panel 26
Disk Drives 26
Disk Drive Filler Panels 28
Power Modules 28

Disk Enclosure Components 29

Link Controller Card (VA 7110/7400/7410 Only) 30
Disk Drives 30
Disk Drive Filler Panels 30
Power Modules 34

Operating the Power/Standby Switch 35

Power-On Self-Test 36
Shutdown 36

Data Storage Process 38

Virtual Array 38
Redundancy Groups 39
Performance Path 45

RAID Levels 47
Data I/O Architecture 52
Operating Tips 57

contents

9

Automatic Hot Spare Setting Behavior 57
Install an Even Number of Disks in Each Redundancy Group 57
Auto Rebuild Behavior 58

2 System Configurations 59

Lowest Entry Point, Non-HA Minimum Configuration (VA 7100
only) 59

Lowest Entry Point, Non-HA Minimum Configuration (VA 7410) 60
Entry Level Non-Cluster With Path Redundancy (All VA arrays) 61
Entry Level Cluster with Path Redundancy High Availability (VA

7410) 62
Midrange Non-Cluster (All VA arrays) 63
Midrange Non-Cluster (VA 7410) 64
Midrange Non-Cluster with Full Storage Path Redundancy (All VA

Arrays) 65
Typical Non-Clustered with Path Redundancy (VA 7410) 66
Typical Clustered Configuration (All VA models) 67
Typical Clustered Configuration (VA 7410) 68
HP-UX MC Service Guard or Windows 2000 Cluster (All VA

arrays) 69
Highly Redundant Cluster (VA 7410) 70
Typical Highly Redundant Cluster (All VA models) 71
Typical Highly Redundant Cluster (VA 7410) 72

10 Contents

3 Troubleshooting 73

Troubleshooting Steps 74
Redundant FRUs 75
Array State & Status 76

Array Power-On Sequence 77
LED Status Indications 78
Tools for Checking Array State & Status 85

Array Controller Logs 86

Types of Array Controller Logs 86
Location of Array Controller Logs 86
Checking Array Controller Logs 87

EMS Hardware Monitors (HP-UX Only) 88

4 Servicing & Upgrading 91

Field Replaceable Units (FRUs) 92

Identifying FRUs 92

Hot Swappable FRUs 97
Controller Enclosure Removal & Installation Procedures 98

Disk Drives 98

Disk Drive Filler Panels 100

Power Modules 102

Fiber Optic Cables 104

Gigabit Interface Converters 106

Array Controllers 107

Array Controller Filler Panels 115

Array Controller Batteries 117

Array Controller DIMMs 120

Midplane Assembly 122
Disk Enclosure Removal & Installation Procedures 125

Disk Drives 125

Disk Drive Filler Panels 125

Power Modules 125

Link Controller Cards (LCCs) 127

Midplane Assembly 131
Upgrading the Array 132

Increasing Storage Capacity 132

Upgrading Single to Dual Array Controllers 134

Upgrading Array Controller DIMMs 135

Upgrading Array Controller Firmware 137

Upgrading Link Controller Card Firmware 137

Upgrading Disk Firmware 138

5 Specifications & Regulatory Statements 139

Physical, Electrical & Environmental Specifications 140
Regulatory Statements 143

Contents 11

12 Contents

Product Overview

The HP StorageWorks Virtual Arrays are Fibre Channel disk arrays featuring
scalability, high performance, and advanced data protection. The VA 7000
Family includes the following models:

■ VA 7100 - an entry level array that includes a single controller enclosure

with up to 15 disks.

■ VA 7110 - a medium-capacity array that includes a controller enclosure

with up to 15 disks, and supports up to 2 additional external disk
enclosures each capable of housing 15 disks.

■ VA 7400 - a high-capacity array that includes a controller enclosure with

up to 15 disks, and supports up to 6 additional external disk enclosures
each capable of housing 15 disks.

■ VA 7410 - a higher-performance model of the VA 7400 that increases the

transfer speed between the array and disk enclosures to
2 Gbits/second, increases the amount of cache to 2 Gbytes, and adds
additional host and disk Fibre Channel ports.

1

Table 1 lists the VA 7000 Family configurations. Figure 1 illustrates the

enclosure configuration for the VA 7400/7410 products.

Both the controller enclosure and the disk enclosure can house up to 15 disk
modules in any combination of 18 GB, 36 GB, or 73 GB disk capacities. The
VA 7410 and VA 7110 also support 146 GB disk modules. The maximum
configuration for a VA 7400/7410 includes 105 disk drives with a total
capacity of 7.67 TB. The controller enclosure includes one or two array
controllers that use advanced storage technology to automatically select the
proper RAID level for storing data.

The array can be connected to one or more hosts, hubs, or switches via fiber
optic cables. Factory-racked products are shipped pre-configured in HP Rack

Product Overview 13

System/E racks. Field-rackable products are supported in the racks listed in

Table 2.

Table 1 Virtual Array Product Configurations

Model

Enclosure/

Configurations

VA 7100 Controller 1 4-15 1 or 2 array controllers

VA 7110 Controller 1 4-15 2 array controllers

VA 7400 Controller 1 10-15 2 array controllers

VA 7410 Controller 1 10-15 2 array controllers

VA 7110/

Disk 0-6 2-15 2 link controllers

7400/7410

a.See Table 25 on page 136 for valid DIMM configurations.

No. of

Enclosures

Disks

Per Encl.

Controller Cards

Per Encl.

1 Gbit/s

1 or 2 Gbit/s

1 or 2 Gbit/s

1 or 2 Gbit/s

7400: 1 Gbit/s
7410: 2 Gbit/s

Table 2 Virtual Array Supported Racks

Rack

Product No.

Rack Name

Height

meters/

EIA Units

No. of

EIA Units per

Array

1

Memory Per

Controller

(in MBytes)

256, 512,

or 1024

1024 or 2048

512 or 1024

1024 or 2048

No. of

Arrays

per Rack

a

N/A

2

J1500A HP Rack System/E41 1.96 m/ 41 U 3 13
J1501A HP Rack System/E33 1.60 m/ 33 U 3 11
J1502A HP Rack System/E25 1.25 m/ 25 U 3 8
E3660B HP System Rack 1.10 m/ 21 U 4 5
E3661B HP System Rack 1.60 m/ 32 U 4 8
E3662B HP System Rack 1.96 m/ 41 U 4 10
9142 Compaq 9000 Rack 2.0 m/ 42 U 3 14
9136 Compaq 9000 Rack 1.7 m/ 36 U 3 12
9122 Compaq 9000 Rack 1.1 m/ 22 U 3 7

1

HP Computer Cabinet requires a 1U filler panel to hide the mounting rails.

2

Does not include space that may be required for PDUs.

14 Product Overview

Figure 1 VA 7400/7410 Maximum Configuration

Product Overview

(2 Enclosures Supported on VA 7110)

Product Overview 15

Supported Operating Systems

Native Operating Systems

The arrays are supported on the following native operating systems running
CommandView SDM software:

— HP-UX 11.x
— Windows NT 4.0
— Windows 2000
— Red Hat Linux

Non-Native Operating Systems

The following non-native operating systems are only supported using a
dedicated management station running CommandView SDM on one of the
native operating systems listed above:

— Sun Solaris
— IBM AIX
— NetWare
— MPE/iX (VA 7100 only)

Array Management Software

HP StorageWorks CommandView SDM (Storage Device Manager)

shipped with the arrays, is used to configure, manage, diagnose, and monitor
the performance of the array. The software runs on the native operating
systems and includes the following interfaces:

— CommandView Graphical User Interface (GUI)
— Command Line User Interface (CLUI)
— CommandView User Interface (CVUI)

16 Product Overview

software,

Product Features

The arrays include the following features:

■ Scalability

The capacities for the different products and disk modules are listed in Table 3.

Table 3 Data Storage Scalability

Product

No.

VA 7100 72 GB min

VA 7110 72 GB min

VA 7400 180 GB min

VA 7410 180 GB min

18 GB

Disk Module

270 GB max

810 GB max

1895 max

1895 max

■ High performance

— 10K rpm & 15K rpm disk drives
— 1 or 2 Gbit/s native Fibre Channel (host to controllers/controllers to

back-end)

— High performance read/write IOPS and cache hits. See Table 4

36 GB

Disk Module

144 GB min
540 GB max

144 GB min
1620 GB max

360 GB min
3780 GB max

360 GB min
3780 GB max

73 GB

Disk Module

292 GB min
1095 GB max

292 GB min
3285 GB max

730 GB min
7665 G B max

730 GB min
7665 G B max

Product Overview

146 GB

Disk Module

Not supported

584 GB min
6570 GB max

Not supported

1460 GB min
15,330 GB max

Table 4 Read/Write & Cache Performance

Product

No.

VA 7100 3,200 IOPS*

VA 7110 7150 IOPS*

VA 7400 8,000 IOPS*

VA 7410 11,000 IOPS*

Random

Reads

3,000 IOPS**

7100 IOPS**

7,500 IOPS**

11,000 IOPS**

Random

Writes

1,600 IOPS*

480 IOPS**
3500 IOPS*

1050 IOPS**

4,000 IOPS*

1,200 IOPS**

5,500 IOPS*

1,100 IOPS**

*RAID 1+0 only
**RAID 5DP only

Sequential

Reads

90 MB/s 45 MB/s 14,000 IOPS

160 MB/s 84 MB/s 15,500 IOPS

160 MB/s 80 MB/s 22,500 IOPS

330 MB/s 250 MB/s 30,000 IOPS

Sequential

Writes

Product Overview 17

Cache

Hits

■ Advanced data protection

— RAID 5DP
— End-to-end data protection
— Mirrored ECC NV-SDRAM

1

— Dual battery cache backup
— Dual-ported native Fibre Channel disks
— Redundant, hot swappable field replaceable components – controllers,

power supplies, cooling, Fibre Channel components

1

Non-volatile synchronous dynamic random access memory/Error

Correction Code

18 Product Overview

Controller Enclosure Components

Figure 2 through Figure 6 show the front and rear panel components of the VA

7000 Family controller enclosures.

Figure 2 VA 7100 Factory-Racked & Field-Racked Controller Enclosure (A/AZ)

Product Overview

3

4

21

56

7

89

10 11

12

14 13 15

1 - Power/Standby Switch 9 - HOST FC LEDs
2 - System LEDs 10 - Array Controller LEDs
3 - Disk Drive Slot No. 1 (of 15) 11 - RS-232 Connector
4 - Disk Drive 1 (of 15) - M/D1* 12 - Array Controller 2 - M/C2*
5 - Disk Drive LEDs 13 - Power Module 1 - M/P1*
6 - ESD Ground Receptacle 14 - AC Power Connector
7 - Array Controller 1- M/C1* 15 - Power Module LEDs
8 - HOST FC Connector - M/C1.H1* 16 - Power Module 2 - M/P2*

*Reference designator used in CommandView SDM

16

Product Overview 19

Figure 3 VA 7100 Controller Enclosure (D)

1

2

14

7

8

13

9

10

15

11

12

16

5

3

4

1 - Power/Standby Switch 10 - Array Controller LEDs
2 - System LEDs 11 - RS-232 Connector
3 - Disk Drive 1 (of 15) - M/D1* 12 - Array Controller 2 - M/C2*
4 - Disk Drive LEDs 13 - AC Power Connector
5 - Disk Drive Slot No. 1 (of 15) 14 - Power Module 1 - M/P1*
6 - Front ESD Ground Receptacle 15 - Power Module LEDs
7 - Array Controller 1 - M/C1* 16 - Power Module 2 - M/P2*
8 - HOST FC Connector - M/C1.H1* 17 - Rear ESD Ground Receptacle
9 - HOST FC LEDs

*Reference designator used in CommandView SDM

20 Product Overview

6 17

Figure 4 VA 7110 Controller Enclosure

3

4

65

789 1011

A
8
1
2
6
A

host 2disk 2

12

A
8
1
2
6
A

12

hostdisk

Product Overview

14

13

15

16

1 - Power/Standby Switch 9 - HOST FC Connector - M/C1.H1*
2 - System LEDs 10 - Array Controller LEDs
3 - Disk Drive Slot No. 1 (of 15) 11 - RS-232 Connector
4 - Disk Drive 1 (of 15) - M/D1* 12 - Array Controller 2 - M/C2*
5 - Disk Drive LEDs 13 - Power Module 1 - M/P1*
6 - ESD Ground Receptacle 14 - AC Power Connector
7 - Array Controller 1 - M/C1* 15 - Power Module LEDs
8 - DISK FC Connector and LED - M/C1.G1* 16 - Power Module 2 - M/P2*

*Reference designator used in CommandView SDM

Product Overview 21

Figure 5 VA 7400 Controller Enclosure

4

65

8

3

9

1110

12 137

14

21

16 15 17 18

1 - Power/Standby Switch 10 - HOST FC Connector - M/C1.H1*
2 - System LEDs 11 - HOST FC LED
3 - Disk Drive Slot No. 1 (of 15) 12 - Array Controller LEDs
4 - Disk Drive 1 (of 15) - M/D1* 13 - RS-232 Connector
5 - Disk Drive LEDs 14 - Array Controller 2 - M/C2*
6 - ESD Ground Receptacle 15 - Power Module 1 - M/P1*
7 - Array Controller 1 - M/C1* 16 - AC Power Connector
8 - DISK FC LED 17 - Power Module LEDs
9 - DISK FC Connector - M/C1.G1* 18 - Power Module 2 - M/P2*

*Reference designator used in CommandView SDM

22 Product Overview

Figure 6 VA 7410 Controller Enclosure (A/AZ)

4

65

3

9

8

10

11

12

137

14

21

Product Overview

16 15 17 18

1 - Power/Standby Switch 10 - HOST 1 FC Port and LED (M/C1.H1*)
2 - System LEDs 11 - HOST 2 FC Port and LED (M/C1.H2*)
3 - Disk Drive Slot No. 1 (of 15) 12 - Array Controller LEDs
4 - Disk Drive 1 (of 15) (M/D1*) 13 - RS-232 Connector
5 - Disk Drive LEDs 14 - Array Controller 2 (M/C2*)
6 - ESD Ground Receptacle 15 - Power Module 1 (M/P1*)
7 - Array Controller 1 (M/C1*) 16 - AC Power Connector
8 - DISK 1 FC Port and LED (M/C1.J1*) 17 - Power Module LEDs
9 - DISK 2 FC Port and LED (M/C1.J2*) 18 - Power Module 2 (M/P2*)

*Reference designator used in CommandView SDM

Product Overview 23

Array Controller

The array controller contains the intelligence and functionality required to
manage the operation of the array. Its functions include:

■ Implementing HP

AutoRAID

™

technology to ensure optimum performance

and cost-efficient data storage.

■ Managing all communication between the host and the disk drives via one

(single array controller) or two (dual array controller) Fibre Channel
arbitrated loops.

■ Maintaining data integrity.

■ Rebuilding the array in the event of a disk failure.

■ Monitoring the operation of all hardware components, including the array

controller itself.

In a dual array controller configuration, two controllers provide redundant
paths to array data. Dual array controllers operate together in active-active
concurrent access mode, allowing a possible increase in I/O performance
while providing data redundancy. In active-active mode, memory maps on
both controllers are constantly and simultaneously updated. By maintaining a
mirror image of the maps, the second controller can take over immediately if
the first controller fails.

Each array controller card includes the following components:

— 1 or 2 Dual Inline Memory Modules (DIMMs)
— 1 Battery
— VA 7100 Only - 1 Gigabit Interface Converter (GBIC)
— Motorola 8240 PowerPC processor (VA 7100 and VA 7400)
— IBM 440 processor (VA 7410)

VA 7410 Fibre Channel Ports

The VA 7410 enhances flexibility, availability, and performance by adding an
additional host port to each controller. This increases the number of paths from
the host systems to the array. The VA 7410 also adds a second disk port to
each controller, resulting in four back-end ports. This creates two independent
Fibre Channel loops between the controller enclosure and the disk enclosures.
Back-end performance is enhanced by distributing the disks across both loops.

24 Product Overview

DIMMs

Each array controller includes one or two ECC SDRAM DIMMs that are battery
backed up and mirrored with the dual controller. This memory is used for the
read and write cache, and for the virtualization data structures. These data
structures provide the logical-to-physical mapping required for virtualization
and are vital to the operation of the array. Without these data structures, all
data in the array is inaccessible.

Note The DIMMs are a critical component in maintaining correct

operation of the array. Use extreme caution when replacing or
modifying the DIMM configuration.

Table 25 on page 136 shows the valid configuration of DIMMs for each

controller cache size. In a dual controller configuration, both controllers must
have the same cache size.

Battery

Note The array controller battery is a critical component in

maintaining the virtualization data structures during a power
loss when the array has not successfully completed a shutdown.
Exhausting the battery power in this state may result in data loss.

Product Overview

Each array controller includes a Lithium Ion-type battery with a built-in
microprocessor. The battery provides backup power to the DIMMs in the event
of a power failure or if array power is switched off. The batteries provide
power for minimum of 84 hours. If line power is lost, the green BATTERY LED
will flash with a 5% duty cycle while powering the DIMMs. A fully charged
battery will maintain DIMM memory contents for a minimum of three days.
(The three-day specification includes derating for battery life, temperature, and
voltage.) If the battery loses its charge, or if it is removed from the controller,
the DIMMs will not be powered and memory maps will be lost.

Battery Status. The controller constantly interrogates the battery for its status. If
the battery cannot maintain memory contents for a minimum of three days, a
warning will notify the operator to replace the battery. Every six months, the
battery performs a self-test to determine its charge status. Then it is fully
discharged and fully recharged to optimize battery life. This action is not
indicated by software or LEDs. In a dual controller configuration, only one
battery at a time is discharged and recharged. If the battery becomes
discharged during normal operation, the green BATTERY LED will turn off and
the amber BATTERY LED will turn on. If the battery has low charge during a

Product Overview 25

power-on self-test, the self-test will halt until the battery is charged to a
minimum operating level.

Battery Life. Many factors affect battery life, including length of storage time,
length of operating time, storage temperature, and operating temperature. A
battery should be replaced if the BATTERY LEDs or the software indicate a
battery has diminished storage capacity.

GBIC (VA 7100 Only)

A Gigabit Interface Converter (GBIC) is connected to the HOST FC connector
on the VA 7100 array controller card. It functions as a fiber optic transceiver,
converting data from an electrical to an optical signal in transmit mode, or
from an optical signal to an electrical signal in receive mode. On the
VA 7400/7410 array controller card, GBIC circuitry is integrated.

Array Controller Filler Panel

An array controller filler panel is used to fill an empty slot in place of an array
controller. A filler panel must be installed to maintain proper airflow in the
array enclosure.

Caution Do not operate the array for more than 5 minutes with an array

controller or filler panel removed. Either an array controller or a
filler panel must be installed in the slot to maintain proper
airflow in the array enclosure. If necessary, the foam in the
replacement array controller packaging can be used to
temporarily fill the array controller slot.

Disk Drives

Both the controller and disk enclosures contain disk drives. Disk drives, or
“disks”, provide the storage medium for the virtual array. Four types of native
Fibre Channel disk drives are supported in the array; disk capacities can be
homogeneous, or can be mixed within the array:

— 18 GB 15K rpm
— 36 GB 10K rpm
— 36 GB 15K rpm
— 73 GB 10K rpm
— 73 GB 15K rpm (VA 7110 and VA 7410 only)
— 146 GB 10K rpm (VA 7110 and VA 7410 only)

26 Product Overview

A new disk can be added at any time, even while the array is operating.
When a disk is replaced, the array applies power to the disk in a controlled
manner to eliminate power stresses. The array controller will recognize that a
new disk has been added and, if the Auto Include feature is enabled, will
include the disk in the array configuration automatically. However, to make the
additional capacity available to the host, a new logical drive must be created
and configured into the operating system.

A label on the disk drive provides the following information:

— Capacity in gigabytes: 18G, 36G, 73G, or 146G
— Interface: FC (Fibre Channel)
— Rotational speed in revolutions per minute: 10K or 15K

Note A red zero (0) on the capacity label distinguishes a disk drive

filler panel from a disk drive.

Image Disks

When the array is formatted, the array controller selects two disks as image
disks. On the VA 7410 a third disk is identified as a backup in the event one of
the primary image disks fails. Because it is not possible to predict which disks
will be selected as the image disks, the management software must be used to
determine which disks have been selected.

Product Overview

The image disks serve two functions:

■ The image disks have space reserved for copies, or “images”, of the write

cache and virtualization data structures stored in the controller NVRAM.
During a shutdown, a complete copy of the NVRAM is stored on both
image disks. If the maps are lost, they can be restored from the image
disks.

■ When resiliency map settings are set to the factory default (Normal

Resiliency), changes to the maps, which have occurred since the last
shutdown, are updated every 4 seconds on the image disks.

Note A shutdown makes the disk set independent of its controller.

Because all of the necessary mapping information is on the
image disks, it is possible to install a new controller or move the
entire disk set to another controller. The new controller will
determine that it has a new disk set, and will logically attach
itself to those disks.

Product Overview 27

If an image disk fails on the VA 7100 or VA 7400, the array will operate with
a single image disk until the failed disk is replaced. If an image disk fails on
the VA 7410, the backup image disk will be used, maintaining image disk
redundancy. When the original failed image disk is replaced, it will be
assigned the role of backup image disk.

Disk Drive Filler Panels

Disk drive filler panels are used in both the controller and disk enclosures to fill
empty slots in place of disk drives. A filler panel must be installed to maintain
proper cooling in the enclosure.

Caution Do not operate the array for more than 5 minutes with a disk

Power Modules

The controller enclosure is shipped with two fully redundant power modules.
Each power module contains:

■ An autoranging power supply that converts ac input power to dc output

power for use by the other array components. The power supplies share the
power load under non-fault conditions. If one power supply fails, the other
supply delivers the entire load to maintain power for the array. Each power
supply uses a separate power cord. Both power supplies can be plugged
into a common ac power source, or each supply can be plugged into a
separate ac circuit to provide power source redundancy.

drive or filler panel removed. Either a disk drive or filler panel
must be installed in the slot to maintain proper airflow and avoid
overheating.

■ Two internal blowers, which provide airflow and maintain the proper

operating temperature within the enclosure. If a blower fails, a fault will
occur. The other power module will continue to operate and its blowers will
continue to cool the enclosure. Even if a power supply fails, both of the
blowers within the power module will continue to operate; dc power for the
blowers is distributed from the midplane.

28 Product Overview

Disk Enclosure Components

Figure 7 shows the front and rear panel components of the disk enclosure

connected to the VA 7400/7410 controller enclosure. Both DS 2400 and
DS 2405 Disk Systems are used as disk enclosures on the VA 7400/7410.

Figure 7 VA 7110/7400/7410 Disk Enclosure (A/AZ)

Product Overview

4

123

56

10

11

9

8

7

17

12

13

14

16 15 18

1 - Power/Standby Switch 10 - ADDRESS Switch
2 - System LEDs 11 - LCC LEDs
3 - Disk Drive Slot No. 1 (of 15) 12 - PORT 1 LINK ACTIVE LED
4 - Disk Drive 1 (of 15) - JAn/D1* 13 - PORT 1 FC-AL Connector - JAn/C1.J2*
5 - Disk Drive LEDs 14 - Link Controller Card 2 - JAn/C2*
6 - ESD Ground Receptacle 15 - Power Module 1 - JAn/P1*
7 - Link Controller Card 1 - JAn/C1* 16 - Power Module LEDs
8 - PORT 0 FC-AL Connector - JAn/C1.J1* 17 - 2G LED (DS 2405 Disk System only)
9 - PORT 0 LINK ACTIVE LED 18 - Power Module 2 - JAn/P2*

*Reference designator used in CommandView SDM

Product Overview 29

Link Controller Card (VA 7110/7400/7410 Only)

The link controller card (LCC) functions as a fiber optic transceiver for the disk
enclosure. It allows up to six disk enclosures to be connected to the controller
enclosure. Each LCC includes a Fibre Channel address switch, used to set the
Fibre Channel loop address of the card. Each disk enclosure must have a
unique address and both LCCs in a disk enclosure must be set to the same
address. For cabling connections and switch settings, see Figure 8 for the
VA 7110, Figure 9 for the VA 7400, and Figure 10 for the VA 7410.

The LCC also monitors the operation of the disk enclosure and provides status
information to the array controller. This includes what disks are present and
their status, power supply status, and notification if the enclosure operating
temperature has exceeded its limits.

Disk Drives

Up to 15 disks can be installed in each disk enclosure. The controller enclosure
and the disk enclosure both use the same disk drives. See "Disk Drives" on

page 26.

Image Disks

The image disks can be located in either the controller enclosure or the disk
enclosure. See "Image Disks" on page 27.

Disk Drive Filler Panels

The controller enclosure and the disk enclosure both use the same disk drive
filler panels. See "Disk Drive Filler Panels" on page 28.

30 Product Overview