HP Compaq StorageWorks RAID Array 4000 User guide
StorageWorks RAID Array 4000
User Guide
Fourth Edition (June 1999)
Part Number 241377-004
Compaq Computer Corporation
Notice
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Compaq StorageWorks RAID Array 4000 User Guide
Fourth Edition (June 1999)
Part Number 241377-004
Contents
About This Guide
Text Conventions.........................................................................................................ix
Symbols in Text............................................................................................................x
Symbols on Equipment.................................................................................................x
Rack Stability...............................................................................................................xi
Getting Help.................................................................................................................xi
Compaq Technical Support..................................................................................xi
Compaq Website..................................................................................................xii
Compaq Authorized Reseller ..............................................................................xii
Chapter 1
Introduction
Features..................................................................................................................... 1-3
Front Panel Features ................................................................................................. 1-4
Rear Panel Features .................................................................................................. 1-5
Hot-Pluggability........................................................................................................ 1-6
Hot-Pluggable Drives ............................................................................................... 1-7
Maximum Storage..................................................................................................... 1-7
SCSI ID Assignments............................................................................................... 1-8
Compaq StorageWorks RA4000 Controller............................................................. 1-9
Features.............................................................................................................. 1-9
Hard Drive Arrays...........................................................................................1-10
Fault Tolerance................................................................................................ 1-10
Capacity Expansion......................................................................................... 1-11
Array Accelerator............................................................................................ 1-11
Performance Monitoring ................................................................................. 1-12
Automatic Performance Tuning ...................................................................... 1-12
Tagged-Command Queuing ............................................................................ 1-13
System Power.................................................................................................. 1-13
Redundant Power Supply Option ........................................................................... 1-13
iv Compaq StorageWorks RAID Array 4000 User Guide
Chapter 2
Installation
Materials Needed.......................................................................................................2-1
Installing the Compaq StorageWorks........................................................................2-3
RAID Array 4000......................................................................................................2-3
Choosing a Location for an RA4000 Tower .............................................................2-4
Choosing a Location for a Rack-Mountable RA4000...............................................2-4
Installing the RA4000 Tower....................................................................................2-4
Installing the Rack-Mountable RA4000....................................................................2-5
Environment ..............................................................................................................2-6
Space Requirements ...........................................................................................2-6
Power Requirements...........................................................................................2-6
Grounding...........................................................................................................2-7
Temperature Requirements ................................................................................2-8
Airflow Requirements........................................................................................2-9
Blanking Panels..................................................................................................2-9
Installation ...............................................................................................................2-10
Installing the Rack-Mountable RA4000 ..........................................................2-10
Installing the Hot-Pluggable Hard Drives...............................................................2-14
Installing the Storage Hub.......................................................................................2-16
Installing the Storage Hub 7.............................................................................2-16
Installing the Storage Hub 12...........................................................................2-17
Installing a Compaq Fibre Host Adapter in a Server ..............................................2-18
Fibre Channel Cables...............................................................................................2-18
Single-Mode Fibre Channel Cable...................................................................2-18
GBIC Option Kit ..............................................................................................2-19
Multi-Mode Fibre Channel Cable ....................................................................2-19
Cable Installation Considerations............................................................................2-20
Rack-Mountable Systems.................................................................................2-20
Tower System..........................................................................................................2-21
Connecting the Power..............................................................................................2-22
Chapter 3
Operation
Applying Power.........................................................................................................3-1
LEDs..........................................................................................................................3-1
Front Panel..........................................................................................................3-2
Power Supply......................................................................................................3-3
Fan Assembly.....................................................................................................3-5
Hard Drives ........................................................................................................3-6
Chapter 4
Troubleshooting
Interpreting Component LEDs ................................................................................. 4-1
Hard Drive LEDs............................................................................................... 4-2
Fibre Host Adapter LEDs.................................................................................. 4-3
RA4000 Controller LEDs.................................................................................. 4-4
Fibre Channel Storage Hub LEDs..................................................................... 4-6
Fan Assembly.................................................................................................... 4-9
Power Supply................................................................................................... 4-10
Replacing Components........................................................................................... 4-11
Replacing the RA4000 Controller without RA4000 Redundant Controller... 4-11
Replacing the RA4000 Controller with Redundant Controller....................... 4-13
Replacing the RA4000 Controller Cache........................................................ 4-15
Replacing GBICs............................................................................................. 4-18
Removing Fibre Channel Cables..................................................................... 4-19
Replacing the Power Supply ........................................................................... 4-19
Replacing the Fan Assembly........................................................................... 4-22
Replacing Hard Drives .................................................................................... 4-24
Chapter 5
Installing the Redundant Power Supply Option
Preparing the RA4000 .............................................................................................. 5-1
Installation ................................................................................................................ 5-2
About This Guide v
Chapter 6
Running the Array Configuration Utility
Before You Begin..................................................................................................... 6-2
Starting the Array Configuration Utility .................................................................. 6-2
Accessing Online............................................................................................... 6-3
SmartStart and Support Software CD................................................................ 6-3
Configuration Wizards.............................................................................................. 6-4
Getting Help.............................................................................................................. 6-4
Configuration Procedures......................................................................................... 6-5
Create a New Array........................................................................................... 6-5
Step 1: Choosing a Controller for the Array ..................................................... 6-6
Step 2: Grouping physical drives of the same size into an array ...................... 6-8
Step 3: Creating Logical Drives...................................................................... 6-11
Capacity Expansion......................................................................................... 6-13
Capacity Extension.......................................................................................... 6-16
Online Migration ............................................................................................. 6-18
Redundant Controllers..................................................................................... 6-20
vi Compaq StorageWorks RAID Array 4000 User Guide
Running the Array Configuration Utility
continued
Array Configuration Utility Screens........................................................................6-21
Main Configuration Screen..............................................................................6-21
Controller Settings Screen................................................................................6-26
Create Array Screen .........................................................................................6-27
Create Logical Drive Screen ............................................................................6-29
Error and Warning Messages ..................................................................................6-31
NetWare Online Array Configuration Utility (CPQONLIN)..................................6-31
Auto-configuration...........................................................................................6-32
Custom Configuration......................................................................................6-33
Handling Disk Drive Failures...........................................................................6-37
Optimizing Array Controller Performance ......................................................6-38
Chapter 7
Options ROMPaq
Running the Procedure ..............................................................................................7-1
Appendix A
Regulatory Compliance Notices
Regulatory Compliance Identification Numbers......................................................A-1
Federal Communications Commission Notice.........................................................A-1
Modifications.....................................................................................................A-2
Cables ................................................................................................................A-2
Canadian Notice (Avis Canadien)............................................................................A-2
European Union Notice ............................................................................................A-2
Japanese Notice ........................................................................................................A-3
Taiwanese Notice......................................................................................................A-3
Laser Devices............................................................................................................A-3
Laser Safety Warnings ......................................................................................A-3
Compliance with CDRH Regulations ...............................................................A-4
Compliance with International Regulations......................................................A-4
Laser Product Label...........................................................................................A-4
Laser Information..............................................................................................A-4
Battery Replacement Notice.....................................................................................A-5
Appendix B
Electrostatic Discharge
Grounding Methods..................................................................................................B-2
About This Guide vii
Appendix C
Specifications
RA4000 (Tower).......................................................................................................C-1
RA4000 (Rack-mountable).......................................................................................C-2
Appendix D
Fibre Channel Technology
Fibre Channel Standards...........................................................................................D-1
Advantages of Fibre Channel ...................................................................................D-1
Fibre Channel and External Storage Systems...........................................................D-2
Point-to-Point Connection.................................................................................D-3
Arbitrated Loop .................................................................................................D-4
Structured Format for Data Transmission ................................................................D-8
Protocol Layers ..................................................................................................D-9
Appendix E
Hard Drive Arrays
The Drive Array........................................................................................................E-1
Drive Arrays ......................................................................................................E-4
Logical Drives ...................................................................................................E-4
Drive Array Benefits.................................................................................................E-5
Data Protection..................................................................................................E-5
Performance Enhancement.....................................................................................E-10
Distributing Data and Data Striping................................................................E-10
Array Accelerator............................................................................................E-12
Concurrent I/O Request Servicing...................................................................E-13
Optimized Request Management .................................................................... E-13
Expanding Storage Capacity...................................................................................E-14
Online Capacity Expansion.............................................................................E-16
Hard Drive Upgrades....................................................................................... E-16
Other Fault Management Features..........................................................................E-17
Auto Reliability Monitoring............................................................................E-17
Dynamic Sector Repairing ..............................................................................E-17
Drive Parameter Tracking ............................................................................... E-17
Drive Failure Alert Features............................................................................E-18
Interim Data Recovery.....................................................................................E-18
Automatic Data Recovery ...............................................................................E-18
viii Compaq StorageWorks RAID Array 4000 User Guide
Appendix F
Recovering From Hard Drive Failure
Recognizing a Drive Failure..................................................................................... F-1
Fault Tolerance and Drive Failure............................................................................ F-2
Non-Fault-Tolerant (RAID 0) Logical Drive.................................................... F-2
RAID 1 (Mirroring) Logical Drive ................................................................... F-2
Spare Drives ...................................................................................................... F-3
Replacing a Failed Drive.......................................................................................... F-4
Automatic Data Recovery................................................................................. F-4
Automatic Data Recovery Failure..................................................................... F-5
Compromised Fault Tolerance ................................................................................. F-5
Index
This guide is designed to be used as step-by-step instructions for installation
and as a reference for operation, troubleshooting, and future upgrades.
Text Conventions
This document uses the following conventions to distinguish elements of text:
Keys Keys appear in boldface. A plus sign (+) between
USER INPUT User input appears in a different typeface and in
FILENAMES File names appear in uppercase italics.
About This Guide
two keys indicates that they should be pressed
simultaneously.
uppercase.
Menu Options,
Command Names,
Dialog Box Names
COMMANDS,
DIRECTORY NAMES,
and DRIVE NAMES
Type When you are instructed to type information, type
Enter When you are instructed to enter information, type
These elements appear in initial capital letters.
These elements appear in uppercase.
the information without pressing the Enter key.
the information and then press the Enter key.
x Compaq StorageWorks RAID Array 4000 User Guide
Symbols in Text
These symbols may be found in the text of this guide. They have the following
meanings.
WARNING:
in the warning could result in bodily harm or loss of life.
CAUTION:
could result in damage to equipment or loss of information.
IMPORTANT:
instructions.
NOTE:
Text set off in this manner presents commentary, sidelights, or interesting points
of information.
Text set off in this manner indicates that failure to follow directions
Text set off in this manner indicates that failure to follow directions
Text set off in this manner presents clarifying information or specific
Symbols on Equipment
These icons may be located on equipment in areas where hazardous conditions
may exist.
Any surface or area of the equipment marked with these symbols
indicates the presence of electrical shock hazards. Enclosed area
contains no operator serviceable parts.
WARNING:
do not open this enclosure.
To reduce the risk of injury from electrical shock hazards,
Any RJ-45 receptacle marked with these symbols indicates a Network
Interface Connection.
WARNING:
the equipment, do not plug telephone or telecommunications
connectors into this receptacle.
To reduce the risk of electrical shock, fire, or damage to
About This Guide xi
Any surface or area of the equipment marked with these symbols
indicates the presence of a hot surface or hot component. If this
surface is contacted, the potential for injury exists.
Rack Stability
WARNING:
the surface to cool before touching.
WARNING:
be sure that:
n The leveling jacks are extended to the floor.
n The full weight of the rack rests on the leveling jacks.
n The stabilizing feet are attached to the rack, if it is a single rack
installation.
n The racks are coupled in multiple rack installations.
n A rack may become unstable if more than one component is extended for
any reason. Extend only one component at a time.
To reduce the risk of injury from a hot component, allow
Power Supplies or Systems marked with these symbols
indicate the equipment is supplied by multiple sources of
power.
WARNING:
remove all power cords to completely disconnect power from
the system.
To reduce the risk of personal injury or damage to the equipment,
To reduce the risk of injury from electrical shock,
Getting Help
If you have a problem and have exhausted the information in this guide, you
can get further information and other help in the following locations.
Compaq Technical Support
You are entitled to free hardware technical telephone support for your product
for as long you own the product. A technical support specialist will help you
diagnose the problem or guide you to the next step in the warranty process.
xii Compaq StorageWorks RAID Array 4000 User Guide
In North America, call the Compaq Technical Phone Support Center at
1-800-OK-COMPAQ
Outside North America, call the nearest Compaq Technical Support Phone
Center. Telephone numbers for world wide Technical Support Centers are
listed on the Compaq website. Access the Compaq website by logging on to
the Internet:
http://www.compaq.com
Be sure to have the following information available before you call Compaq:
n Technical support registration number (if applicable)
n Product serial number(s)
n Product model name(s) and numbers(s)
n Applicable error messages
n Add-on boards or hardware
n Third-party hardware or software
n Operating system type and revision level
n Detailed, specific questions
Compaq Website
1
. This service is available 24 hours a day, 7 days a week.
The Compaq website has information on this product as well as the latest
drivers and Flash ROM images. You can access the Compaq website:
http://www.compaq.com
Compaq Authorized Reseller
For the name of your nearest Compaq Authorized Reseller:
n In the United States, call 1-800-345-1518.
n In Canada, call 1-800-263-5868.
n Elsewhere, see the Compaq website for locations and telephone
numbers.
1
For continuous quality improvement, calls may be recorded or monitored.
Chapter
Introduction
The Compaq StorageWorks RAID Array 4000 is a high-performance, external
system using various Fibre Channel devices and the Fibre Channel I/O
Standard to connect servers to external storage systems.
The Compaq StorageWorks RAID Array 4000 supports the following
components:
n Rack-mountable or Tower model Compaq RA4000
n Compaq RA4000 Controller (installed in the Compaq RA4000)
n Compaq StorageWorks Fibre Channel Storage Hub 7 or 12
n Fibre Channel cables
q Multi-mode for distances between 2 and 500 meters.
q Single-mode for distances of more than 500 meters and up to
10 kilometers
n GigaBit Interface Converter (GBIC) modules
q Shortwave GBICs for use with multi-mode cables
q Longwave GBIC for use with single-mode cables (optional)
n Hot-pluggable power supply
n Hot-pluggable Redundant Fan Assembly
n SmartStart and Support Software CD
1-2
Compaq StorageWorks RAID Array 4000 User Guide
n Wide-Ultra SCSI-3, Fast-Wide SCSI, or Fast SCSI-2 hard drive support
n Redundant Hot-pluggable Power Supply (optional)
The Compaq StorageWorks RA4000 comes in either a rack-mountable or a
tower model, as shown in Figure 1-1 and Figure 1-2.
TROJ001.EPS
Figure 1-1. Compaq StorageWorks RA4000 (tower model)
TROJ002.EPS
Figure 1-2. Compaq StorageWorks RA4000 (rack-mountable model)
Features
Table 1-1
RA4000 Features
Features Description
Form Factors
Models
Controller
Maximum Number of Drives
Hard Drive Interface Wide-Ultra SCSI-3
Host Interface Fibre Channel Arbitrated Loop
SCSI ID Select Automatic
Options
Hot-Pluggable Components
LEDs
Warranty
Tower
19-inch rack
Tower
Rack-mountable
RAID 0, 1, 4, and 5
64-MB Read/Write Cache
12 (1-inch)
8 (1.6-inch)
Redundant Power Supply
Longwave GBIC
Drives
Fan Assembly
Power Supply (in redundant power supply
configurations)
Hard Drives
Storage System Front Panel
Fan Assembly
RA4000 Controller
Power Supply
Three-years parts and labor
On-site where available
Introduction
1-3
1-4
Compaq StorageWorks RAID Array 4000 User Guide
Front Panel Features
Figure 1-3 shows the front panel controls accessible to the user. The
rack-mountable model has the LEDs and power switch, but does not have a
plastic door.
Figure 1-3. Front panel feature (tower model shown)
1
2
3
Table 1-2
Front Panel Features
Number Feature
1
2
3
LEDs
Power switch (behind sliding door)
Keylock
Rear Panel Features
Figure 1-4 shows the features and accessible components on the rear panel.
1
2
3
4
5
Figure 1-4. Rear panel features (tower model shown)
Table 1-3
Rear Panel Features
Introduction
1-5
Number Feature
1
2
3
4
5
Power supply
RA4000 Controller
Fan Assembly
Blank panel (Redundant RA4000
Controller)
Redundant power supply bay
1-6
Compaq StorageWorks RAID Array 4000 User Guide
Hot-Pluggability
Hot-pluggability refers to the ability to remove and replace components
without powering down the system. There are four components in the Compaq
RA4000 that are considered hot-pluggable:
Hard Drives—Failed hot-pluggable drives in fault-tolerant configurations
RAID 1, 4, and 5 can be replaced without interrupting system operation. The
data on the failed drive will be restored automatically on the replacement drive
online.
Fan Assembly—If one of the cooling fans in the assembly should fail (the fan
LED is amber), the Fan Assembly can be removed and replaced. The fan
assembly must be replaced within five minutes to ensure system operation
continues without interruption.
Power supply—Only in systems with the optional redundant power supply
installed, either power supply may be removed and replaced without
interrupting system operation.
RA4000 Controller—If the failed RA4000 Controller cache is replaced with
the same size cache on the existing RA4000 Controller, the controller can be
removed, the cache replaced, and the controller reinstalled without interrupting
system operation. Changing the cache size requires that you power down the
system.
See Chapter 4, “Troubleshooting,” for specific limitations when replacing
hot-pluggable components.
Hot-Pluggable Drives
The Compaq RA4000 supports these Compaq hot-pluggable drives:
n 1.6-inch Fast SCSI-2
n 1.6-inch Fast-Wide SCSI-2
n 1.6-inch Wide-Ultra SCSI-3
n 1-inch Fast SCSI-2
n 1-inch Fast-Wide SCSI-2
n 1-inch Wide-Ultra SCSI-3
The RA4000 accepts both 1-inch and 1.6-inch standard height drives. The
drives must be mounted on Compaq hot-pluggable drive trays. SCSI IDs are
assigned automatically according to the drive location, allowing 1-inch and
1.6-inch drives to be intermixed easily.
Maximum Storage
The maximum number of drives that can be installed in the Compaq RA4000
is shown in the table below.
Introduction
1-7
NOTE:
Both the 1-inch and 6-inch hard drives can be intermixed when installed in the
Compaq RA4000. To optimize capacity when intermixing drives, refer to the shadow
markings on the faceplate for appropriate 1-inch and 6-inch drive positions.
Table 1-4
Maximum Number of Hard Drives
Drive Tray Height Number of Drives
1-inch 12
1.6-inch 8
1-8
Compaq StorageWorks RAID Array 4000 User Guide
SCSI ID Assignments
Each device on a SCSI bus must have a unique identification number in the
range of 0 to 6. The SCSI ID determines the device priority when attempting
to use the SCSI bus. The highest priority, SCSI ID 7, is reserved for the
controller.
SCSI IDs are assigned automatically in the storage system according to the
drive bay used for each drive. It is not necessary to assign SCSI IDs manually.
The SCSI ID for each bay is indicated on the front panel.
The SCSI IDs assigned to drive bays in the Compaq StorageWorks RA4000
are shown in Figure 1-5.
Bus 2
SCSI ID's
1.6" Drives
Bus 1
5
4
3
2
1
0
5
4
3
2
1
0
Bus 2
Bus 1
SCSI ID's
1" Drives
4
3
1
0
4
3
1
0
Figure 1-5. SCSI ID numbering in the RA4000
TROJ006.EPS
Compaq StorageWorks RA4000 Controller
The RA4000 Controller is a drive array controller designed for installation in
the RA4000. The RA4000 Controller supports Wide-Ultra SCSI-3, Fast-Wide
SCSI-2, and Fast SCSI-2. The RA4000 is equipped with one installed RA4000
Controller.
Features
The advanced features supported by the RA4000 Controller are:
n Support for RAID 0, 1, 4, and 5 fault-tolerance options
n Fibre Channel support for connection to the server
n Support for Wide-Ultra SCSI-3, Fast-Wide SCSI-2, and Fast SCSI-2
hard drives
n Online Capacity Expansion (Microsoft Windows NT and Novell
NetWare only)
n Online Volume Extension
n Online Stripe Size Migration
Introduction
1-9
n Online RAID Migration
n Removable RA4000 Controller Cache
n Battery-backed 64-MB Cache with ECC memory
n Controller board containing a 16-MB Read Cache
n Performance monitoring through Compaq Insight Manager
n Automatic performance tuning
n Pre-failure notification on hard disk drives
n Array Configuration Utility (ACU)
n Read-ahead caching
n Tagged-command queuing
n Multiple logical drives per RA4000
n Array Diagnostics Utility (ADU)
1-10
Compaq StorageWorks RAID Array 4000 User Guide
Hard Drive Arrays
Drive array technology distributes data across a series of hard drives to unite
these physical drives into one or more higher performance logical drives.
Distributing the data makes it possible to access it concurrently from multiple
drives in the array, yielding faster I/O rates than nonarrayed drives. Each
logical drive in the array can be set to a different fault-tolerant configuration.
The RA4000 Controller manages the drive array independent of the host
processor.
There are several ways to configure each set of hardware. The Array
Configuration Utility is used to help you configure the hardware in the way
that best suits your needs. For more information on storage expansion, see
Appendix E, “Hard Drive Arrays.” See Chapter 6, “Running the Array
Configuration Utility,” for information on the Array Configuration Utility.
Fault Tolerance
Fault tolerance refers to several possible methods used to protect your system
from data loss in the event of a hardware failure somewhere in the storage
system. Each method has its advantages; choosing one requires careful
planning for your particular requirements.
The fault-tolerance methods supported by the RA4000 Controller and the
Compaq Array Configuration Utility include:
n Distributed data guarding (RAID 5)
n Data guarding (RAID 4)
n Drive mirroring (RAID 1)
n No fault tolerance (RAID 0)
Further data protection can be achieved by assigning an online spare to any
RAID 1, RAID 4, or RAID 5 configuration. For more information on the fault
tolerance settings, see Appendix E, “Hard Drive Arrays.”
Capacity Expansion
Capacity Expansion refers to the ability to add storage capacity to an existing
array by adding hard drives.
The Array Configuration Utility lets you perform Capacity Expansion, even in
fault-tolerant configurations, without requiring a data backup and restore
cycle. If you are using Microsoft Windows NT or Novell NetWare operating
systems, the storage expansion can also be performed online, without leaving
the server operating system. For more information on storage expansion, see
Appendix E, “Hard Drive Arrays.”
Array Accelerator
Introduction
1-11
CAUTION:
not handled properly. For precautions regarding batteries, see Appendix A,
“Regulatory Compliance Notices.”
The Array Accelerator consists of the 16-MB Read Cache on the controller
board and 48-MB Read/Write ECC battery-backed removable cache.
The RA4000 Controller Array Accelerator improves performance on data
access to the drive array by serving as a posted-write cache and read-ahead
cache. The write cache can accept data from the server, then write the data to
the drives at a later time. The read-ahead cache uses a multi-threaded
algorithm to predict the next likely read operation for the array. That data is
then read into the Array Accelerator from the drives. When the RA4000
Controller receives a read request for the cached data, it is sent immediately
into the system. The Array Accelerator feature may be disabled by the Array
Configuration Utility if desired.
The Array Accelerator has Error Checking and Correcting (ECC) memory,
providing a high level of data integrity. ECC memory detects and corrects hard
and soft memory errors without affecting performance.
Onboard rechargeable batteries in the Array Accelerator ensure that the data
temporarily held (cached) there is safe even with equipment failure or power
outage. This is particularly important for data that has been cached by a
posted-write cache but has not yet been written to the hard drives. The
batteries preserve data in the Array Accelerator for up to four days.
The batteries in the Array Accelerator can be dangerous if they are
1-12
Compaq StorageWorks RAID Array 4000 User Guide
IMPORTANT:
when the board is first installed. During power up with discharged Array Accelerator
batteries, the Array Accelerator is disabled. This is not a problem that requires user action
on your part. The Array Accelerator is automatically enabled when the batteries are
charged to 90% of their capacity.
It may take up to 36 hours for the internal circuitry to fully charge the batteries. During
this time, the Array Accelerator will be disabled, but the RA4000 Controller will function
properly, although without the performance advantage of the Array Accelerator.
The Array Accelerator, with backup batteries, is located on a removable
daughterboard. In the unlikely event of an RA4000 Controller failure, the
Array Accelerator can be detached from the failed RA4000 Controller and
attached to a replacement RA4000 Controller. If the configuration information
stored in the Array Accelerator matches that stored on the drives, any valid
posted-write data being held in the cache is written automatically to the drives
attached to the replacement RA4000 Controller. Thus, data being held in the
Array Accelerator memory can be recovered despite failure of the main
RA4000 Controller.
The rechargeable batteries on a new RA4000 Controller can be discharged
Performance Monitoring
Compaq Insight Manager can be used to monitor the performance of several
RA4000 Controller parameters. The displayed parameters include CPU usage,
total number of read and write commands processed, and average time to
process a read or write command. Also displayed for each logical drive are
total I/O count, number of read and write requests, and number of sectors read
or written. Compaq recommends using Insight Manager to monitor the
performance of your drive arrays.
Automatic Performance Tuning
The RA4000 Controller has the ability to adjust or tune its performance
without manual intervention. For example, if caching is enabled but the
RA4000 Controller determines that it is no longer beneficial, caching is
automatically disabled. If write or read-ahead caching would improve
performance, but it has been automatically disabled, the RA4000 Controller
enables it again.
Tagged-Command Queuing
The RA4000 Controller also supports tagged-command queuing, which allows
SCSI hard drives to queue and sort multiple commands, then execute the
commands in the optimal order for highest drive performance.
System Power
System power in the Compaq RA4000 does not shut off completely with the
power switch. The two positions of the front panel power switch should be
considered as ON and STANDBY, rather than ON and OFF. The STANDBY
position removes power from most of the electronics and the drives, but
portions of the power supply and some internal circuitry remain active.
Consequently, to remove all power from the system, you must disconnect the
power cord from the storage system. In systems with multiple power supplies,
you must disconnect all the power cords to remove power completely from the
system.
Introduction
1-13
WARNING:
disconnect power from the storage system by unplugging all power cords from
either the electrical outlet or the storage system.
To reduce the risk of electric shock or damage to the equipment,
Redundant Power Supply Option
The Compaq RA4000 has provisions for adding a second power supply, which
acts as a redundant supply when it is installed. The redundant power supply is
identical to the primary supply and shares the electrical load equally. If either
supply should fail or be removed, the other supply takes over the full load
without interruption. Hot-pluggability permits replacing the failed supply
without shutting the system down.
The Redundant Power Supply can be installed by the user at any time by
simply plugging it in to the storage system. No tools are needed and there is no
need to bring the system down. See Chapter 5, “Installing the Redundant
Power Supply Option” for more information on installing and using this
option.
This chapter provides information about the installation and configuration of
the Compaq StorageWorks RAID Array 4000.
NOTE:
Because of the similarities between the tower and the rack-mountable models of
the RA4000, most of this information applies to both models. Therefore, to avoid
repetition, these instructions will be directed generally to the tower model of the storage
system. Where the differences are important, specific instructions are given for each
model.
Materials Needed
Chapter
Installation
IMPORTANT:
firmware update, check the Compaq website at www.compaq.com.
To take advantage of all features and make sure you have the latest
To install the Compaq StorageWorks RAID Array 4000, you will need the
following materials:
■ Compaq RA4000 (Tower or Rack-Mountable)
■ Rack mounting hardware (Rack-Mountable only)
q Left and right mounting brackets (supplied)
q Mounting screws and cage nuts (supplied)
q #2 Phillips screwdriver (not supplied)
■ Hot-pluggable SCSI hard drive(s)
■ Compaq StorageWorks RA4000 Controller (pre-installed)
2-2
Compaq StorageWorks RAID Array 4000 User Guide
■
Compaq StorageWorks Fibre Channel Host Adapter/P or Compaq
StorageWorks Fibre Channel Host Adapter/E
■
Compaq StorageWorks Fibre Channel Storage Hub 7 or 12 and
mounting hardware (if required)
■
GigaBit Interface Converter (GBIC) modules (Two GBICs are required
for each Fibre Channel cable installed.)
q Shortwave GBIC option kit for use with multi-mode cables
(part number 234459-B21)
NOTE:
Two Shortwave GBICs are provided with each RA4000 and Fibre Host
Adapter.
q Longwave GBIC option kit for use with single-mode cables
(part number 340412-B21)
NOTE:
Single-mode Fibre Channel cables are not provided with this kit. A list of
Fibre Channel cable suppliers can be found at the Compaq website:
www.compaq.com
■ Fibre Channel cable
q Multi-mode for distances from 2 meters to 500 meters
q 2-meter multi-mode cable kit, part number 234457-B21
q 5-meter multi-mode cable kit, part number 234457-B22
q 15-meter multi-mode cable kit, part number 234457-B23
q Single-mode for distances of more than 500 meters and up to
10 kilometers
■ AC power cord (supplied)
■ Pencil (not supplied)
■ Cage nut installation tool (for rack only—not supplied)
Installing the Compaq StorageWorks
RAID Array 4000
To install the Compaq StorageWorks RAID Array 4000, you will need to:
1. Choose a location.
2. Install the RA4000 in the rack (rack model only) or in the location
chosen for the tower model.
3. Install the hot-pluggable drive(s).
4. Install the Compaq StorageWorks Fibre Channel Storage Hub. Refer to
the documentation supplied with this device for details on installation
and rack mounting.
5. Install the Fibre Host Adapter in an available slot in the server. Refer to
the Compaq StorageWorks Fibre Channel Host Bus Adapter Installation
Guide and the server documentation for details about installing option
boards.
6. Install a GigaBit Interface Converter (GBIC) module in the receptacle
provided at the Fibre Host Adapter and the RA4000 Controller. The
Fibre Channel Storage Hub requires two GBICs-- one for each cable
attached.
Installation
2-3
7. Connect the Fibre Host Adapter, the RA4000 Controller, and the Fibre
Channel Storage Hub together using appropriate lengths of Fibre
Channel cable.
8. Plug in the power cord(s).
9. Apply power to the equipment in the following order:
a. Fibre Channel Storage Hub
b. RA4000
c. Server
10. Run System ROMPaq and install operating system drivers supporting
the Fibre Host Adapter, using the Compaq SmartStart and Support
Software CD.
11. Run the Array Configuration Utility. (See Chapter 6, “Running the
Array Configuration Utility,” for more information.)
2-4
Compaq StorageWorks RAID Array 4000 User Guide
Choosing a Location for an RA4000
Tower
Choose an installation location with the following features:
■
A sturdy, level surface—preferably on or near the floor
■
At least 8 inches (20 cm) of clearance at the front of the storage system
for access to the hot-pluggable drives
■
At least 12 inches (30.5 cm) of clearance at the back of the storage
system for proper ventilation, cable access, and maintenance access to
replaceable components
■
A grounded electrical outlet that is easily accessible and is located as
close to the storage system as possible
Choosing a Location for a
Rack-Mountable RA4000
Choose an installation location with the following features:
■ Higher in the rack than many other components
IMPORTANT:
following documentation:
■ Rack Resource CD Kit (shipped with Compaq racks or available through a Compaq
■ Rack Builder Configuration Tool CD (available on the Compaq website or can be
■ Rack Information Library CD (available on the Compaq website or can be ordered
■ A grounded electrical outlet that is easily accessible and located as near
For help in placing the storage system in the 19-inch rack, refer to the
authorized reseller)
ordered with the Rack Resource CD Kit)
with the Rack Resource CD Kit)
the storage system as possible
Installing the RA4000 Tower
Place the RA4000 in its chosen location. Proceed to “Installing the
Hot-Pluggable Hard Drives” later in this chapter.
Installing the Rack-Mountable RA4000
Before beginning these procedures, make sure you understand the following
warnings and caution:
Installation
2-5
WARNING:
To reduce the risk of personal injury or damage to the equipment,
be sure that:
■
The leveling jacks are extended to the floor.
■
The full weight of the rack rests on the leveling jacks.
■
The stabilizing feet are attached to the rack, if it is a single rack
installation.
■
The racks are coupled in multiple rack installations.
■
A rack may become unstable if more than one component is extended for
any reason. Extend only one component at a time.
WARNING:
■ Do not disable the power cord grounding plug. The grounding plug is an
To reduce the risk of electric shock or damage to the equipment:
important safety feature.
■ Plug the power cord into a grounded (earthed) electrical outlet that is
easily accessible at all times.
■ Install the power supply before connecting the power cord to the power
supply.
■ Unplug the power cord before removing the power supply.
■ If the system has multiple power supplies, disconnect power from the
system by unplugging all power cords from the power supplies.
CAUTION:
The Compaq RA4000 must always be operated with the system unit
cover on. Proper cooling will not be achieved if the system unit cover is
removed.
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