User Guide
Part Number 240333-001
October 2001 (First Edition)
Product Version: Version 1.0
COMPAQ CONFIDENTIAL
Writer: Liz M. Weiman File Name: a-frnt.doc
Codename: Voyager CL Part Number: 240333-001 Last Saved On: 11/6/01 12:18 PM
2001 Compaq Computer Corporation.
Compaq, the Compaq logo, Armada, and ProLiant are trademarks of Compaq Information
Technologies Group, L.P.
Microsoft, Windows, and Windows NT are trademarks of Microsoft Corporation.
Intel, Pentium, and Celeron are trademarks of Intel Corporation.
All other product names mentioned herein may be trademarks of their respective companies.
Compaq shall not be liable for technical or editorial errors or omissions contained herein. The
information in this document is provided "as is" without warranty of any kind and is subject to
change without notice. The warranties for Compaq products are set forth in the express limited
warranty statements accompanying such products. Nothing herein should be construed as
constituting an additional warranty.
Printed in the U.S.A.
Compaq Smart Array Cluster Storage
October 2001 (First Edition)
Part Number 240333-001
COMPAQ CONFIDENTIAL
Writer: Liz M. Weiman File Name: a-frnt.doc
Codename: Voyager CL Part Number: 240333-001 Last Saved On: 11/6/01 12:18 PM
Contents
About This Guide
Important Safety Information ............................................................................................ ix
Symbols on Equipment...................................................................................................... ix
Rack Stability..................................................................................................................... xi
Symbols in Text................................................................................................................. xi
Text Conventions.............................................................................................................. xii
Related Documents........................................................................................................... xii
Getting Help.....................................................................................................................xiii
Compaq Technical Support.......................................................................................xiii
Compaq Website ....................................................................................................... xiii
Compaq Authorized Reseller .................................................................................... xiv
1
Introduction
Features ............................................................................................................................ 1-2
Front View ....................................................................................................................... 1-4
Rear View ........................................................................................................................ 1-5
Hot-Pluggability .............................................................................................................. 1-6
Hot-Pluggable Drives ...................................................................................................... 1-6
Maximum Storage ........................................................................................................... 1-6
SCSI ID Assignments ...................................................................................................... 1-7
Compaq Smart Array Cluster Storage Controller............................................................1-7
Features ..................................................................................................................... 1-7
Controller Display.....................................................................................................1-8
SCSI I/O Module with an Integrated Environmental Monitoring Unit (EMU) ........ 1-9
Hard Drive Arrays...................................................................................................1-10
Array Configurations .............................................................................................. 1-10
Fault Tolerance........................................................................................................1-10
Array Controller Features........................................................................................1-11
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Contents
Overview of Array Accelerator Features ...................................................................... 1-11
Array Accelerator Batteries........................................................................................... 1-12
Performance Monitoring......................................................................................... 1-13
System Power ......................................................................................................... 1-13
Redundant Power Supply/Blower Assembly ................................................................ 1-14
2
Operation and Troubleshooting
Connecting the Power ..................................................................................................... 2-1
Applying Power .............................................................................................................. 2-2
Indicators ......................................................................................................................... 2-3
Enclosure Status Indicators....................................................................................... 2-3
Power Supply/Blower Assembly.............................................................................. 2-5
Hard Drives............................................................................................................... 2-5
Interpreting Component Indicators ................................................................................. 2-7
Hard Drive Indicators ............................................................................................... 2-8
Smart Array Cluster Storage Controller Indicators .................................................. 2-8
Replacing Components ................................................................................................. 2-11
Replacing the Smart Array Cluster Storage Controller .......................................... 2-11
Replacing the Smart Array Cluster Storage Controller Cache ............................... 2-13
Controller Cache Battery Pack Replacement ................................................................ 2-17
Replacing a Variable Speed Blower ....................................................................... 2-20
Replacing a Power Supply...................................................................................... 2-23
Replacing Hard Drives ........................................................................................... 2-25
3
Running the Array Configuration Utility
Starting the Array Configuration Utility ......................................................................... 3-2
Accessing Online...................................................................................................... 3-2
Running the Compaq Smart Array Cluster Storage Support Software CD/SmartStart
for Servers CD (version 5.30 or later) ...................................................................... 3-3
Configuration Wizards .................................................................................................... 3-4
Getting Help .................................................................................................................... 3-4
Configuration Procedures................................................................................................ 3-4
Create a New Array .................................................................................................. 3-5
Capacity Expansion ................................................................................................ 3-14
Capacity Extension ................................................................................................. 3-17
Online RAID Level or Stripe Size Migration......................................................... 3-19
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Contents
Redundant Controllers ............................................................................................ 3-22
Array Configuration Utility Screens..............................................................................3-23
Main Configuration Screen ..................................................................................... 3-23
Controller Settings Screen.......................................................................................3-29
Create Array Screen ................................................................................................ 3-30
Create Logical Drive Screen ................................................................................... 3-32
Error and Warning Messages.........................................................................................3-35
NetWare Online Array Configuration Utility (CPQONLIN) ........................................ 3-35
Auto-configuration .................................................................................................. 3-36
Custom Configuration.............................................................................................3-37
Optimizing Array Controller Performance..............................................................3-43
4
Updating Firmware for Array Controllers and Hard Drives with
Options ROMPaq
Running the Procedure for Array Controllers..................................................................4-1
Running the Procedure for Hard Drives .......................................................................... 4-3
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 Compliance ........................................................................................................... A-3
Battery Replacement Notice ........................................................................................... A-4
B
Electrostatic Discharge
Grounding Methods ........................................................................................................ B-2
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Contents
C
Specifications
D
Hard Drive Arrays
What is a Drive Array? ...................................................................................................D-1
Fault Tolerance Methods.................................................................................................D-6
RAID 0 No Fault Tolerance ..................................................................................D-6
RAID 1 Drive Mirroring........................................................................................D-7
RAID 5 Distributed Data Guarding.......................................................................D-8
RAID ADG Advanced Data Guarding ..................................................................D-9
E
Recovering from Hard Drive Failure
Hard Drive Failure .......................................................................................................... E-2
Recognizing Drive Failure........................................................................................ E-3
Compromised Fault Tolerance ................................................................................. E-4
Automatic Data Recovery......................................................................................... E-5
Replacing a Drive............................................................................................................ E-6
Drive Failure in NetWare................................................................................................ E-7
Hardware-Based Fault Tolerance ............................................................................. E-8
NetWare (Software-Based) Fault Tolerance............................................................. E-9
No Fault Tolerance ................................................................................................. E-13
Moving Array Controller Drives and Arrays ................................................................ E-15
Expanding and Extending Capacity........................................................................ E-16
F
Controller Display messages
Operation ......................................................................................................................... F-1
Messages ................................................................................................................... F-1
Scrolling.................................................................................................................... F-3
User Input ................................................................................................................. F-3
Deleting Messages .................................................................................................... F-3
Redundancy Link Indicator ...................................................................................... F-3
Special Notes ............................................................................................................ F-4
Display Messages ..................................................................................................... F-5
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Contents
G
Recovery ROM and ROM Cloning
Recovery ROM............................................................................................................... G-1
ROM Cloning ................................................................................................................. G-1
H
SCSI ID Assignments
SCSI ID Table................................................................................................................. H-1
Index
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About This Guide
About This Guide
This guide is designed to be used as step-by-step instructions for installation and as a
reference for operation, troubleshooting, and future upgrades.
Important Safety Information
Before installing this product, read the Important Safety Information document
provided.
Symbols on Equipment
The following symbols may be placed on equipment to indicate the presence of
potentially hazardous conditions:
WARNING: This symbol, in conjunction with any of the following symbols,
indicates the presence of a potential hazard. The potential for injury exists if
warnings are not observed. Consult your documentation for specific details.
This symbol indicates the presence of hazardous energy circuits or electric shock
hazards. Refer all servicing to qualified personnel.
WARNING: To reduce the risk of injury from electric shock hazards, do not
open this enclosure. Refer all maintenance, upgrades, and servicing to
qualified personnel.
Compaq Smart Array Cluster Storage User Guide ix
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About This Guide
This symbol indicates the presence of electric shock hazards. The area contains no
user or field serviceable parts. Do not open for any reason.
WARNING: To reduce the risk of injury from electric shock hazards, do not
open this enclosure
This symbol on an RJ-45 receptacle indicates a network interface connection.
WARNING: To reduce the risk of electric shock, fire, or damage to the
equipment, do not plug telephone or telecommunications connectors into this
receptacle.
This symbol indicates the presence of a hot surface or hot component. If this surface
is contacted, the potential for injury exists.
WARNING: To reduce the risk of injury from a hot component, allow the
surface to cool before touching.
These symbols, on power supplies or systems, indicate that the
equipment is supplied by multiple sources of power.
WARNING: To reduce the risk of injury from electric shock,
remove all power cords to completely disconnect power from the
system.
This symbol indicates that the component exceeds the recommended weight for
one individual to handle safely.
Weight in kg WARNING: To reduce the risk of personal injury or damage to the
equipment, observe local occupational health and safety requirements and
Weight in lb
guidelines for manual material handling.
x Compaq Smart Array Cluster Storage User Guide
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About This Guide
Rack Stability
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.
Only one component is extended at a time. A rack may become unstable if
more than one component is extended for any reason.
Symbols in Text
These symbols may be found in the text of this guide. They have the following
meanings.
WARNING: Text set off in this manner indicates that failure to follow directions
in the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could
result in damage to equipment or loss of information.
IMPORTANT: Text set off in this manner presents clarifying information or specific
instructions.
NOTE: Text set off in this manner presents commentary, sidelights, or interesting points of
information.
Compaq Smart Array Cluster Storage User Guide xi
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About This Guide
Text Conventions
This document uses the following conventions:
Italic type is used for complete titles of published guides or variables. Variables
include information that varies in system output, in command lines, and in
command parameters in text.
Bold type is used for emphasis, for onscreen interface components (window
titles, menu names and selections, button and icon names, and so on), and for
keyboard keys.
Monospace typeface is used for command lines, code examples, screen
displays, error messages, and user input.
Sans serif typeface is used for uniform resource locators (URLs).
Related Documents
For additional information on the topics covered in this guide, refer to the
following documentation:
Compaq Smart Array Cluster Storage Installation Overview, p/n 240330
Redundant Controller Option Kit Installation Card, p/n 230937
xii Compaq Smart Array Cluster Storage User Guide
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About This Guide
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
In North America, call the Compaq Technical Support Phone Center at
1-800-OK-COMPAQ. This service is available 24 hours a day, 7 days a week. For
continuous quality improvement, calls may be recorded or monitored. Outside North
America, call the nearest Compaq Technical Support Phone Center. Telephone
numbers for worldwide Technical Support Centers are listed on the Compaq website,
www.compaq.com.
Be sure to have the following information available before you call Compaq:
Technical support registration number (if applicable)
Product serial number
Product model name and number
Applicable error messages
Add-on boards or hardware
Third-party hardware or software
Operating system type and revision level
Compaq Website
The Compaq website has information on this product as well as the latest drivers and
Flash ROM images. You can access the Compaq website at www.compaq.com.
Compaq Smart Array Cluster Storage User Guide xiii
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About This Guide
Compaq Authorized Reseller
For the name of your nearest Compaq authorized reseller:
In the United States, call 1-800-345-1518.
In Canada, call 1-800-263-5868.
Elsewhere, see the Compaq website for locations and telephone numbers.
xiv Compaq Smart Array Cluster Storage User Guide
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1
Introduction
The Compaq Smart Array Cluster Storage is a high-performance external storage
system offering cluster support, redundancy, and Advanced Data Guarding to create a
fully integrated solution.
NOTE: For the most updated information on supported components, refer to the Compaq
website at www.compaq.com.
The Smart Array Cluster Storage supports the following components:
Compaq Smart Array Cluster Storage Controller (installed in the Compaq Smart
Array Cluster Storage)
VHDCI to VHDCI SCSI Cables (6 foot)
Redundant hot-pluggable power supplies/blower assemblies (2)
Compaq Smart Array Cluster Storage Support Software CD-ROM
Ultra2 and Ultra3 Pluggable Universal Hard Disk Drives
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Introduction
The Smart Array Cluster Storage is rack-mountable model, as shown in the
figure below.
Figure 1-1: Compaq Smart Array Cluster Storage
Features
The Smart Array Cluster Storage includes the following features:
Table 1-1: Smart Array Cluster Storage Features
Features Description
Form Factors Compaq Series rack, 4U
Model Rack-mountable
Smart Array Cluster Storage RAID 0, 1, 5, Advanced Data
Controller Guarding with battery-backed cache
Maximum Number of Drives 14 (1-inch)
Hard Drive Interface Compaq Ultra3 SCSI
continued
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Introduction
Table 1-1: Smart Array Cluster Storage Features continued
Features Description
Supported Drives Ultra2 and Ultra3 Pluggable
Universal Hard Disk Drives
Hot-Pluggable Components Hard Drives
Smart Array Cluster Storage
Controller
Redundant Power Supplies/Blower
Assemblies
SCSI I/O Module with Integrated
Environmental Monitoring Unit
(EMU)
Options Optional additional battery-backed
cache
Optional Redundant Smart Array
Cluster Storage Controller
Cables VHDCI to VHDCI SCSI Cables
(6 foot)
Warranty Three-years parts
Three-years labor
Three-years on-site where available
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Introduction
Front View
The front view of the accessible controls are displayed in the figure below.
1 2 3 4
7 6 5
Figure 1-2: Front view
Blank panel (when hot-pluggable redundant
controller is not present)
Service port (for technicians only)
Hot-Pluggable Smart Array Cluster Storage
Controller
Controller Display
Power Switch
Enclosure Status indicators
Hot-pluggable hard drives
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Introduction
Rear View
The features and accessible components on the rear panel are displayed in the figure
below.
1
7 6 5 4 3 2 4 3 2
Figure 1-3: Rear view
Blank Panel (Do not remove. The blank panels
are necessary for airflow)
Power Supply/Blower Assemblies
Power Supply/Blower Assembly indicators
AC Power cord connectors
SCSI Port A connector
SCSI Port B connector
SCSI I/O Module with Integrated
Environmental Monitoring Unit (EMU)
Hot-Pluggability
Hot-pluggability refers to the ability to remove and replace components without
powering down the system. There are three components in the Smart Array Cluster
Storage that are considered hot-pluggable:
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Introduction
Hard Drives--Failed hot-pluggable drives in RAID 1, 5, and Advanced Data
Guarding configurations can be replaced without interrupting system operation. Data
on the failed drive is restored automatically to the replacement drive.
Power Supply/Blower Assembly-- The redundant power supply allows you to
remove either power supply and replace it without interrupting system operation. The
Smart Array Cluster Storage is equipped with two variable speed blowers. If one of
the cooling blowers in the assembly fails, the other blower automatically operates at a
higher speed. A failed blower can be removed and replaced without removing the
power supply.
CAUTION: Removing a power supply significantly changes the airflow within the
Smart Array Cluster Storage. After removal of a supply, the remaining supply starts a
timer that will shut the system down in approximately five minutes.
Smart Array Cluster Storage Controller --If your system has two controllers, and
one controller fails, you can remove and replace the failed controller without shutting
down the system. See Chapter 2, "Operation and Troubleshooting," for specific
limitations when replacing hot-pluggable components.
Hot-Pluggable Drives
The Smart Array Cluster Storage supports 1-inch Compaq Ultra2 and Ultra3
Pluggable Universal Hard Disk Drives.
Maximum Storage
You can install a maximum of 14 drives in the Smart Array Cluster Storage.
SCSI ID Assignments
SCSI IDs are assigned automatically in the storage system according to the drive bay
used for each drive. Refer to Appendix H, "SCSI ID Assignments," to find the SCSI
Assignment table.
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Introduction
Compaq Smart Array Cluster Storage Controller
The Smart Array Cluster Storage Controller is a drive array controller designed for
installation in the Smart Array Cluster Storage. The Smart Array Cluster Storage
Controller supports Ultra2 and Ultra3 Pluggable Universal Hard Disk Drives. The
Smart Array Cluster Storage comes equipped with one Smart Array Cluster Storage
Controller installed (a redundant controller can be purchased separately).
Features
The advanced features supported by the Smart Array Cluster Storage Controller are:
Support for RAID 0, 1, 5, and Advanced Data Guarding fault tolerance options
Support for 1" Compaq Ultra2 and Ultra3 Pluggable Universal Hard Disk Drives
Online Capacity Expansion, Online Capacity Extension (depending on the
operating system), Online Stripe Size Migration, and Online RAID Migration
Removable Battery-backed Cache with ECC memory (Array Accelerator)
Performance monitoring through Compaq Insight Manager
Pre-failure notification on hard disk drives
Array Configuration Utility (ACU)
ROM Recovery and ROM Cloning (See Appendix G)
Maximum of 32 logical drives per Smart Array Cluster Storage
Controller Display
Each array controller in a Smart Array Cluster Storage contains an integrated Liquid
Crystal Display (LCD) display. This module is used for displaying informational and
error messages, showing the current status of the module, and for providing user
input when required. Traditional Power-On-Self-Test (POST) messages issued by
PCI-based array controllers have been combined with runtime event notification
messages to create a new set of controller display messages. The text and explanation
of the display messages can be found in Appendix F, "Controller Display Messages."
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Introduction
1 2 3 4 5
7 6
Figure 1-4: Controller display
Fault indicator (amber)
Display
Left push button
Up push button
Right push button
Down push button
Redundancy Link indicator (green)
SCSI I/O Module with an Integrated Environmental Monitoring
Unit (EMU)
This element performs several functions, including monitoring the enclosure
operation, detecting and indicating errors, providing I/O connectors, and displaying
enclosure status.
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Introduction
Figure 1-5: Environmental Monitoring Unit
The EMU functions include:
Monitoring the power supplies and temperature of enclosures
Detecting and reporting element changes in the enclosure and showing the
addition or removal of a hot-pluggable component
Controlling drive status indicators
The enclosure functions and operations that the EMU monitors include:
Temperature
Power Supplies
Blowers
Drives (shows the presence of the drives)
For more information on the EMU, including installation and removal and status
Indicators, refer to Chapter 2, "Operation and Troubleshooting", in the section titled
"Enclosure Status Indicators."
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Introduction
Hard Drive Arrays
Drive array technology distributes data across a series of individual hard drives to
unite these physical drives into one or more higher-performance logical drives.
Distributing the data allows for concurrent access from multiple drives in the array,
yielding faster I/O rates than non-arrayed drives. Each logical drive in the array can
be set to a different fault tolerant configuration. The controller manages the drive
array independent of the host processor. For more information array technology, see
Appendix D, "Hard Drive Arrays."
Array Configurations
There are several ways to configure the physical drives. The Array Configuration
Utility helps you configure the hardware in the way that best suits your needs. See
Chapter 3, "Running the Array Configuration Utility," for information on the Array
Configuration Utility. For information on the Array Configuration Utility XE, see the
Compaq Array Configuration Utility XE User Guide, part number 239449. Refer to
the Compaq website at www.compaq.com to download this user guide.
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 Smart Array Cluster Storage Controller
and the Compaq Array Configuration Utility include:
Advanced Data Guarding
Distributed data guarding (RAID 5)
Drive mirroring (RAID 1)
Drive mirroring and striping (RAID 1)
No fault tolerance (RAID 0)
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Introduction
Further data protection can be achieved by assigning an online spare to any RAID 1,
RAID 5, or Advanced Data Guarding configuration. For more information on fault
tolerance settings, see Appendix D, "Hard Drive Arrays."
Array Controller Features
The array controller includes several important features including Online Capacity
Expansion, Online Capacity Extension (depending on the operating system), Online
Stripe Size Migration, and Online RAID Migration.
For more information on these features, see Chapter 3, "Running the Array
Configuration Utility."
Overview of Array Accelerator Features
The Array Accelerator is a high performance, 100-MHz SDRAM DIMM read/write
cache that is particularly useful for increasing performance in database and fault
tolerant configurations. It performs both protected posted-write caching and read-
ahead caching, allowing data to be accessed much faster than from disk storage.
In protected posted-write caching, data is written to the cache memory on the Array
Accelerator rather than directly to the drives. Later, when the system is idle, the
controller writes the cached data to the drive array.
The read-ahead cache detects sequential accesses to the array, reads ahead data, and
stores the data in the cache until the next read access arrives. If the data is of a
sequential nature, the data can be loaded immediately into system memory, avoiding
the latency of a disk access.
If the Smart Array Cluster Storage Controller fails before cached data is stored on the
disk, the Array Accelerator and its integrated batteries may be moved from one Smart
Array Cluster Storage Controller and installed on a replacement controller. Any data
in the Array Accelerator that has not been written to the hard drive will be transferred
to the replacement Smart Array Cluster Storage Controller.
Other features of the Array Accelerator:
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Introduction
Mounted on a removable daughterboard (allows stored data to be moved to
another controller if the original controller fails)
Backed up with replaceable batteries
Adjustable read/write ratio - usually set during array configuration but can be
changed at any time
16-Bit Error Checking and Correcting (ECC) SDRAM memory. This detects and
corrects all single-bit memory errors. It also detects all two-bit memory errors in
any position, and most three- and four-bit memory errors in a single SDRAM.
With ECC, an entire memory chip can also fail without data loss. This provides a
high level of data integrity by ensuring the correction of common memory errors
without affecting system performance.
Array Accelerator Batteries
The Array Accelerator has two rechargeable and replaceable NiMH battery packs.
Under normal operating conditions, these should last for three years before
replacement is necessary. They are continuously recharged via a "trickle" charging
process whenever the system is powered on.
The battery packs protect data on the Array Accelerator against equipment failure or
power outage for up to four continuous days.
NOTE: Temperature, age, and cache size may affect battery life.
This also applies if the Array Accelerator is removed from the Smart Array Cluster
Storage Controller. When power is restored to the system, an initialization process
writes the preserved data to the disk drives. This is particularly important for data that
has been cached by a posted-write, but has not yet been written to the hard drives.
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Introduction
IMPORTANT: The batteries on a new Smart Array Cluster Storage Controller may be
discharged when the board is first installed. In this case, a Power-On Self-Test (POST)
message will be displayed on the controller display panel when the controller is powered on,
indicating that the Array Accelerator is temporarily disabled. No action is required on your part,
since the internal circuitry will automatically recharge the batteries. Recharging the batteries
can take up to 4 hours. The Smart Array Cluster Storage Controller will function properly
during this time, although without the performance advantage of the Array Accelerator. When
the batteries are charged to 90 percent of their capacity, the Array Accelerator is automatically
enabled.
For detailed battery replacement instructions, see Chapter 2, "Operation and
Troubleshooting."
Performance Monitoring
Compaq Insight Manager can be used to monitor the performance of several Smart
Array Cluster Storage 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. Use
Compaq Insight Manager to monitor the performance of your drive arrays.
System Power
System power to the Compaq Smart Array Cluster Storage 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.
WARNING: To reduce the risk of electric shock or damage to the equipment,
disconnect power from the storage system by unplugging all power cords
from either the electrical outlet or the storage system.
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Introduction
Redundant Power Supply/Blower Assembly
The Compaq Smart Array Cluster Storage includes a redundant power supply. The
redundant power supply is identical to the primary supply and shares the electrical
load. If either supply fails or is removed, the other supply takes over the full load
without interruption. Hot-pluggability allows you to replace the failed supply without
shutting the system down.
The Compaq Smart Array Cluster Storage includes a redundant blower. If one blower
operates too slowly, or completely shuts off, the other blower will begin to operate at
a higher speed. At the same time, the error condition is reported to the user.
Refer to the sections in Chapter 2 titled "Replacing a Power Supply" and "Replacing
a Variable Speed Blower" for more information.
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2
Operation and Troubleshooting
This chapter contains operating and troubleshooting procedures and suggestions to
follow when diagnosing problems on the Compaq Smart Array Cluster Storage.
Connecting the Power
Your power cord should be approved for use in your country. The power cord must
be rated for the product and for the voltage and current marked on the product's
electrical ratings label. The voltage and current rating of the cord should be greater
than the voltage and current rating marked on the product. In addition, the diameter
of the wire must be a minimum of 1.00 mm or 18 AWG. If you are using 18 AWG,
your maximum length may be up to 12 feet.
A power cord should be routed so that it is not likely to be walked on or pinched by
items placed upon it or against it. Particular attention should be paid to the plug,
electrical outlet, and the point where the cord exits from the product.
After all hardware components are installed and the unit is in place, the power can be
connected.
1. Plug the AC power cord into the Smart Array Cluster Storage. The power supply
automatically senses the input voltage. It is not necessary to select the correct
main voltage.
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Operation and Troubleshooting
WARNING: To reduce the risk of electric shock or damage to the equipment:
Do not disable the power cord grounding plug. The grounding plug is an
important safety feature.
Plug the power cord into a grounded (earthed) electrical outlet that is easily
accessible at all times.
Disconnect power from the storage system by unplugging all power cords from
either the electrical outlet or storage system.
2. Plug the AC power cord into a nearby, grounded outlet.
3. Plug the second AC power cord into the Redundant Power Supply.
4. Plug the second AC power cord into a nearby grounded outlet.
Applying Power
Before applying power to the Smart Array Cluster Storage, all components of the
storage system must be installed and connected to the supported interconnect options.
Hard drives should be installed in the Smart Array Cluster Storage so that they can be
identified and configured at power up.
The Compaq Smart Array Cluster Storage components must be powered up in the
following order:
WARNING: You must power on the Smart Array Cluster Storage before
powering on the servers. After powering on, wait until the message "Compaq
Startup Complete" appears on your display. It may take up to two minutes for
the system to completely power up.
1. Smart Array Cluster Storage--Powered on with the power switch located in
the far right lower area of the front panel. After powering on, wait until the
message "Compaq Startup Complete" appears on your display. This process may
take up to two minutes.
2. Server(s).
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Operation and Troubleshooting
Indicators
The Smart Array Cluster Storage is equipped with a series of indicators. The
following sections list the indicators.
Enclosure Status Indicators
The Enclosure Status indicators are found on the Smart Array Cluster Storage, as
displayed in the figure below.
1
2
3
Figure 2-1: Enclosure Status indicators
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Operation and Troubleshooting
Table 2-1: Enclosure Status Indicators
Number Indicator Condition Meaning
EMU Blinking Green EMU is
operating
normally
EMU Off/Solid EMU is not
operating
normally
Power Green System power
ON
Power Off System in
STANDBY or
system power
has been
removed
Fault Amber Fault detected
in one or more
subsystems
Fault Off No faults
detected
IMPORTANT: The system power in the Smart Array Cluster Storage does not shut off
completely with the power switch. STANDBY removes power from most of the electronics and
the drives, but portions of the power supply and some internal circuitry remain active. To
remove the power completely, disconnect all power cords from the equipment.
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Operation and Troubleshooting
Power Supply/Blower Assembly
The green indicator on the power supply assembly is on when both the power supply
and the blower are operational. When there is either a power supply or blower fault,
the power supply indicator goes off. If the power supply indicator is off, AC power is
not present or there is a complete power supply failure.
The power supply-mounted blowers cool the enclosure by circulating air through the
enclosure and elements. The rate at which air moves (the airflow) determines the
amount of cooling. This airflow is a function of blower speed (rpm). These blowers,
under the control of the Environmental Monitoring Unit (EMU) or the associated
power supply, can operate at multiple speeds. This ensures that when the enclosure
temperature changes the blowers can automatically adjust the airflow.
If one blower operates too slowly, or completely shuts off, the other blower will
begin to operate at a higher speed. At the same time, the error condition is reported to
the user.
Figure 2-2: Power Supply/Blower Assembly Indicators
Hard Drives
The three disk drive status indicators, as shown in Figure 2-3, define the operational
status of each drive.
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Operation and Troubleshooting
3
2
1
Figure 2-3: Hard drive indicators
Table 2-2: Hard Drive Status from Indicator Combinations
Activity Online Fault Meaning
On Off Off The drive is being accessed, but it is:
Not configured as part of an array, or
A replacement drive and rebuild has not yet started,
or
Spinning up during POST
Flashing Flashing Flashing Do not remove the drive. Removing a drive during
this process can cause data loss in non-fault-
tolerant configurations.
The drive is part of an array being selected by the
Array Configuration Utility, or
Options ROMPaq is upgrading the drive.
Off Off Off OK to replace the drive online
The drive is not configured as part of an array or
The drive is configured as an online spare.
continued
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Operation and Troubleshooting
Table 2-2: Hard Drive Status from Indicator Combinations continued
Activity Online Fault Meaning
On Flashing Off Do not remove the drive. Removing a drive
during this process can cause data loss in
non-fault-tolerant configurations
The drive is a replacement drive and is
being rebuilt or
If all online lights in a drive array are
blinking, an expansion is occurring.
Off Off On OK to replace the drive online.
The drive has failed, and has been placed off-
line.
Off, on or On Off Do not remove the drive. Removing a drive
flashing during this process can cause data loss in
non-fault-tolerant configurations.
The drive is online and configured as part of an
array.
Off, on or On or Off Flashing A predictive failure alert has been received for
flashing this drive. Replace the drive as soon as
possible.
Interpreting Component Indicators
If the fault indicator on any of the Smart Array Cluster Storage components is amber,
or if Compaq Insight Manager indicates a fault, determine the reason for this alert by
examining the component indicators to see if any indicates a fault.
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Operation and Troubleshooting
Hard Drive Indicators
CAUTION: Failure to observe the instructions in this section can result in loss of
data.
Look for amber Drive Failure indicators on any hot-pluggable drive tray.
Figure 2-4: Drive Failure indicator
If any Drive Failure indicator appears amber, replace that drive as soon as possible.
See the section titled "Replacing Components," later in this chapter, for important
information on when it is safe to replace drives.
Smart Array Cluster Storage Controller Indicators
During normal runtime, the Smart Array Cluster Storage Controller has 18 indicators
that indicate activity or malfunction of the controller. They are labeled 0-17.
Table 2-3 describes the purpose and function of each indicator.
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Operation and Troubleshooting
15 14 13 12 11 10 9 8 17
7 6 5 4 3 2 1 0 16
Figure 2-5: Smart Array Cluster Storage Controller
indicators
Table 2-3: Smart Array Cluster Storage Controller Indicator Descriptions
Indicator Function Description
0-2 Busy status ON = Indicates this Array
Controller is idle
OFF = Indicates this Array
Controller is operating at full
capacity
3-5 Not Applicable
6 Event Notification
outstanding on host port A
7 Event Notification
outstanding on host port B
8 Idle Heartbeat Indicates the Array Controller
is idle and functioning
9 Active/Standby ON=Controller is active
OFF=Controller is in standby
continued
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Operation and Troubleshooting
Table 2-3: Smart Array Cluster Storage Controller Indicator Descriptions
continued
Indicator Function Description
10 Direct Memory ON = DMA transfers are
Access (DMA) active active
11 Logical I/O active ON = Currently
processing logical
requests from the Host
Adapter
12 SCSI Bus 0 active ON = Indicates requests
are outstanding on the
first SCSI bus
13 SCSI Bus 1 active ON = Indicates requests
are outstanding on the
second SCSI bus
14 Cache Activity ON = Cache active
OFF = No cache activity
Blinking = Cache
transfer pending
15 Drive failure ON = A configured hard
drive has failed in the
array
16 Redundancy Active Green indicates two
controllers are in a
redundant mode of
operation.
17 Fault Amber indicates an
error message has been
sent to the controller
display.
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Operation and Troubleshooting
Replacing Components
CAUTION: It is important to follow these instructions when replacing components in
the Smart Array Cluster Storage. If the procedure is done improperly, it is possible to
lose data or damage equipment. Refer to Appendix B, "Electrostatic Discharge," for
important information on using proper procedures.
IMPORTANT: To take advantage of all features, check the Compaq website
(www.compaq.com) to make sure you have the latest firmware update.
Replacing the Smart Array Cluster Storage Controller
The following steps detail how to replace a failed Smart Array Cluster Storage
Controller.
IMPORTANT: Before replacing your controller, follow these guidelines:
If your system is equipped with a single controller, and this controller fails, it is
recommended that the cache from the failed controller be migrated to a new controller.
This is done to complete the disk writes that may have been trapped in the controller's
cache.
During a hard drive expansion, migration, or extension process, the redundancy feature of
the controllers will be temporarily disabled. At the end of the expansion, migration or
extension process, the redundancy feature of the controllers will be automatically
reinstated. No action is required by the user. For more information on this process, see
Chapter 3, "Array Configuration Utility."
Please note that this scenario is for expansion, migration, or extension only. Regular drive
rebuilds are not affected by this, and the controllers remain fully redundant during a drive
rebuild process.
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Operation and Troubleshooting
1. Press the controller's thumb latch, and pull the latch handle toward you .
2. Remove the Smart Array Cluster Storage Controller by pulling it straight out of
the chassis .
2
1
Figure 2-6: Removing the Smart Array Cluster Storage
Controller
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Operation and Troubleshooting
3. Insert the replacement controller into the chassis .
4. Push the controller in as far as it will go and press the latch inwards until it is
flush against the front panel .
1
2
Figure 2-7: Installing the replacement controller
Replacing the Smart Array Cluster Storage Controller Cache
IMPORTANT: If your system is equipped with a single controller, and you must replace the
controller cache, you must power down the system first. If your system is equipped with two
controllers, and you want to replace a failed cache module with another of the same size, you
can replace the module while the system is running. If your system is equipped with two
controllers, and you are replacing the cache module with a module of a different size, you must
power down the system first, and then change the cache module on both controllers at the
same time.
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