Enterprise Virtual Array
Drive Enclosure
User Guide
Par t Number: EK-52DRV-UA. A01
First Edition August 2001
Product Version: VCS 1.0
This publication is for use by individuals responsible for installing,
configuring, and maintaining an Enterprise Virtual Array Drive
Enclosure.
b
2001 Compaq Computer Corporation.
Com paq, the Compaq logo, StorageWorks, and SANworks are trademarks of Compaq Information
Technologies Group, L.P.
UNIX is a trademark of The Open Group.
All other product names mentioned herein may be trademarks of their respective companies.
Confidential computer software. Valid license from Compaq required for possession, use or copying.
Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software
Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under
vendor's standard commercial license.
Com paq 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.
Com paq service tool software, including associated documentation, is the property of and contains
confidential technology of Compaq Computer Corporation. Service customer is hereby licensed to use
the software only for activities directly relating to the delivery of, and only during the term of, the
applicable services delivered by Compaq or its authorized service provider. Customer may not modify or
reverse engineer, remove, or transfer the software or make the software or any resultant diagnosis or
system management data available to other parties without Compaq's or its authorized service provider's
consent. Upon termination of the services, customer will, at Compaq's or its service provider's option,
destroy or return the software and associated documentation in its possession.
Printed in the U.S.A.
Enter prise Virtual Array Drive Enclosure User Guide
First Edition August 2001
Par t Number: EK-52DRV-UA. A01
Contents
About this Guide
Text Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Symbols in Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Symbols on Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Rack Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Compaq Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Compaq Website . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Compaq Authorized Reseller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
1 Introducing the Drive Enclosure
Enterprise Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Enclosure Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Drive Enclosure Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
FC-AL Buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Data Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Status Monitoring and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Enclosure Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Enclosure Status Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Major Enclosure Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Element Replacement Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Enterprise Virtual Array Drive Enclosure User Guide iii
Contents
2 Configuring the FC-AL Disk Drive Enclosure
Basic Enterprise Storage System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fiber Optic Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Loop Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Initializing the Fibre Channel Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Enterprise Storage System Loop Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Verifying Enclosure Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3 FC-AL I/O Modules
I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fibre Channel Loop Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
I/O Module Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
I/O Module Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4 Disk Drives
Drive Status Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Drive Activity Icon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Drive On-line Icon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Drive Failure Icon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Drive Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Drive Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Drive Blank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Replacing a Drive or Drive Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5 Enclosure Power and Cooling
Enclosure Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Blower Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Supply and Blower Status Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Replacing a Power Supply or Blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
iv Enter prise Virtual Array Drive Enclosure User Guide
Contents
6 Replacing CRUs
ESD Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Common Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Determining CRU Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
How to Replace a Disk Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
How to Install a Drive Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
How to Remove a Drive Blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
How to Replace a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
How to Replace a Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
How to Replace an EMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 611
How to Replace an I/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612
How to Replace a Fiber Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615
A Regulatory Notices
FCC Class A Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1
Country-Specific Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2
B Specifications
Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B1
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B4
Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B5
C Protecting Fiber Optic Connections
Glossary
Index
Enterprise Virtual Array Drive Enclosure User Guide v
Contents
Figures
11 Drive enclosure--front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
12 Drive enclosurerear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
13 6-Drive enclosure Enterprise Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . 14
14 12-Drive enclosure Enterprise Storage System . . . . . . . . . . . . . . . . . . . . . . . . . 15
15 14-Drive enclosure bay numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
21 Typical rack configurationfront view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
22 I/O module port (transceiver) locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
23 Typical operational LED status displays--enclosure front. . . . . . . . . . . . . . . . 27
31 I/O module B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
32 I/O module A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
33 I/O module locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
34 Input and output ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
35 I/O module status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
41 Drive icons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
42 Drive blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
51 Power supply and blower assembly components . . . . . . . . . . . . . . . . . . . . . . . 51
61 Typical Compaq product label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
62 Removing a drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
63 Removing a drive to install a drive blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
64 Installing and removing a drive blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
65 Replacing a power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
66 Removing a blower from a defective power supply . . . . . . . . . . . . . . . . . . . . . 67
67 Installing a blower on a replacement power supply . . . . . . . . . . . . . . . . . . . . . 68
68 Removing a blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
69 Installing a blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 610
610 Disconnecting the EMU Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 611
611 Removing an EMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 611
612 Removing a cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 613
613 Removing an I/O module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 614
A1 Typical enclosure certification label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2
vi Enter prise Virtual Array Drive Enclosure User Guide
Contents
Tables
1 Text Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
11 14-Drive Enclosure Major Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12 Enclosure Status Icon Displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
21 2 Gb Fiber Optic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
22 Typical Operational LED Status DisplayEnclosure Rear View . . . . . . . . . . . 28
31 Operational I/O Module LED Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . 35
32 Nonoperational I/O Module Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . 35
41 Operational Drive Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
42 Nonoperational Drive Status Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
51 Power Supply and Blower Status LED Displays . . . . . . . . . . . . . . . . . . . . . . . 53
B1 Drive Enclosure Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B2
B2 Drive Enclosure Elements Physical Specifications . . . . . . . . . . . . . . . . . . . . . B2
B3 Environmental Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B4
B4 Environmental Shipping or Short Term Storage Specifications. . . . . . . . . . . . B4
B5 Enterprise Storage System AC Input Line Voltages. . . . . . . . . . . . . . . . . . . . . B5
B6 AC Input Current and Wattage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B6
B7 Output Voltage and Current Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . B6
B8 Dual Power Supply Configuration Power Specifications . . . . . . . . . . . . . . . . B7
Enterprise Virtual Array Drive Enclosure User Guide vii
About this Guide
The following sections are covered:
Text Conventions
Symbols in Text
Symbols on Equipment
Rack Stability
Getting Help
Compaq Authorized Reseller
Text Conventions
This document uses the conventions in Table 1 to distinguish elements of text.
Table 1: Text Conventions
Element Convention Examples
Nam ed Keys Bold Home, Print Screen, Num Lock, Esc, PgUp
Key A plus sign (+) between two keys means that
Sequences you should press them simultaneously:
Ctrl+A, Ctrl+Home, Alt+Ctrl+Del
Menu Items Initial Caps On the File menu, choose Save.
(for UNIX, AIX, and
Director y Save the file in the C:\StorageSets\Default
Solaris directory names,
Names directory.
the exact case of every
Button (UNIX, AIX, Solaris): Save the file in the
character is displayed).
Names /home/newuser/practice directory.
Dialog Box To back up files, click the Backup Now button.
Names In the Save As dialog box, choose the drive
then the folder.
Enterprise Virtual Array Drive Enclosure User Guide ix
About this Guide
Table 1: Text Conventions (Continued)
Element Convention Examples
Initial Caps and User Input and System Responses:
User Input
and System monospace font. To exit from the program, type Exit.
Responses
At the prompt, type this command:
(Output and
COMMAND NAMES appear SHOW THIS_CONTROLLER
Error
in upper case, unless (no variable)
Messages)
they are case sensitive To see your settings, give the command:
COMMAND (UNIX, AIX, and Solaris SHOW FULL
NAMES command names are (with variable)
case sensitive and will
Dr ive Names
You will see the Continue? message.
not appear in uppercase).
Command Names
Use SET THIS_CONTROLLER to change
Entered
parameters.
are displayed in angle
To manage storage, enter RUN
brackets (< >) and all
sysmgr.exe
lower case.
(UNIX, AIX, Solaris): To list files, give the ls
command.
Drive Names:
Navigate to your CD-ROM drive
(usually D: or E:).
To configure storage, edit storageset.ini.
filenames Unless case sensitive,
use lowercase italics. Changes are stored in
If filenames are NewSystemConfigurationFile.ini.
case-sensitive (UNIX,
(UNIX, AIX, Solaris): Errors are logged to
AIX, Solaris) or are
MixedCaseFile.txt.
easier to understand with
some upper case letters,
the exact case of each
character is displayed.
Menu Command Initial Caps, with a right To compare documents, choose:
Sequences angle bracket (>) Tools > Documents > Compare.
between items. Menu
items are displayed as
shown on screen.
URL s Sans serif font. http://www.compaq.com/storage
x Enter prise Virtual Array Drive Enclosure User Guide
About this Guide
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 or damage to
equipment.
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.
Symbols on Equipment
Any enclosed 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: To reduce the risk of injury from electrical shock hazards, do
not open this enclosure.
Any RJ-45 receptacle marked with these symbols indicates a network
interface connection.
WARNING : To reduce the risk of electrical shock, fire, or damage to the
equipment, do not plug telephone or telecommunications connectors into
this receptacle.
Enterprise Virtual Array Drive Enclosure User Guide xi
About this Guide
Any surface or area of the equipment marked with these symbols
indicates the presence of a hot surface or hot component. Contact with
this surface could result in injury.
WARNING: To reduce the risk of injury from a hot component, allow the
surface to cool before touching.
Power supplies or systems marked with these symbols indicate the
presence of multiple sources of power.
WARNING: To reduce the risk of injury from electrical shock,
remove all power cords to completely disconnect power from the
supplies and systems.
Any product or assembly marked with these symbols indicates that the
component exceeds the recommended weight for one individual to
handle safely.
WARNING : To reduce the risk of personal injury or damage to the
equipment, observe local occupational health and safety requirements
and guidelines for manually handling material.
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.
Getting Help
If you still have a question after reading this guide, contact a Compaq Authorized
Service Provider or visit out website.
xii Enter prise Virtual Array Drive Enclosure User Guide
About this Guide
Compaq Technical Support
In North America, call the Compaq technical support at 1-800-OK-COMPAQ. This
service is available 24 hours a day, 7 days a week.
NOTE: For continuous quality improvement, calls may be recorded or monitored.
Outside North America, call Compaq technical support at the nearest location.
Telephone numbers for worldwide technical support are listed on the Compaq
website: http://www.compaq.com.
Be sure to have the following information available before you call Compaq:
Technical support registration number (if applicable)
Product serial numbers
Product model names and numbers
Applicable error messages
Operating system type and revision level
Detailed, specific questions
Compaq Website
The Compaq website has the latest information on this product as well as the latest
drivers. Access the Compaq website at: http://www.compaq.com/storage.
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.
Elsew here, see the Compaq website for locations and telephone numbers.
Enterprise Virtual Array Drive Enclosure User Guide xiii
1
Introducing the Drive Enclosure
IMPORTANT: The terms "Fibre" and "fiber" are not interchangeable.
Fibre is the international spelling that refers to the Fibre Channel standards for both optical and
copper media.
Fiber refers to the optical media for implementing Fibre Channel.
This chapter describes the Enterprise Storage System Fibre Channel-Arbitrated Loop
(FC-AL) drive enclosures (see Figure 11 and Figure 12). These enclosures support
the FC-AL connections on both the external (host controller-to-enclosure) and the
internal buses.
WARNING: The physical size and weight of the
rack requires a minimum of two people to
move it. If one person tries to move the rack,
there is a potential for injury.To ensure
stability of the rack, always push on the lower
half of the rack. Be especially careful when moving
the rack over any bump (for example: doorsills,
ramp edges, carpet edges, or elevator openings).
When the rack is moved over a bump, there is a
CXO7196A
potential for it to tip over.
To safely and easily install the enclosure, remove the drives, power supplies and
blowers, EMU, and I/O modules as described in Chapter 6, "Replacing CRUs."
This reduces the enclosure weight to approximately 24 lb (11.0 kg). Even though
a single person can lift this weight, the enclosure is difficult to install because of
the physical size. Therefore, Compaq recommends a minimum of two people to
install an empty enclosure in a rack.
Enterprise Virtual Array Drive Enclosure User Guide 11
Introducing the Drive Enclosure
1
3
5
7
2 9
4 11
6 13
8
10
12 15
14
CXO7164A
to I Drive Bays Q Enclosure Status Icons
Figure 11: Drive enclosure--front view
Use Figure 12 to locate the rear-mounted enclosure elements.
1 2 3 4 5 6 7
CXO7484A
Blower 2
EMU
Power supply 2
I/O Module B
I/O module A
Blower 1
Power Supply 1
Figure 12: Drive enclosurerear view
12 Enter prise Virtual Array Drive Enclosure User Guide
Introducing the Drive Enclosure
IMPORTANT: The Enterprise Storage System Fibre Channel implementation uses a low-power
laser transceiver or gigabit (Gb) interface converter (GBIC) that does not pose a threat to the
human eye.
Enterprise Storage System
The drive enclosure is one major component of both the 6- (see Figure 13) and
12-drive enclosure (see Figure 14) Enterprise Storage Systems.
The other major components of the Enterprise Storage System are:
The Enterprise Storage System rack. The Enterprise Virtual Array Rack User
Guide provides a detailed description of the rack including configurations,
installation, and operation.
The HSV controller. The Enterprise Virtual Array HSV Controller User Guide
provides a detailed description of the rack including configurations, installation,
and operation.
Enterprise Virtual Array Drive Enclosure User Guide 13
Introducing the Drive Enclosure
3
3
1
1
2
2
CXO7619A
CXO7646A
Front View Rear View
HSV controller pair Bus Address 07
Disk drive enclosures 13 Bus Addresses 0103
Disk drive enclosures 46 Bus Addresses 0810
Figure 13: 6-Drive enclosure Enterprise Storage System
14 Enter prise Virtual Array Drive Enclosure User Guide
Introducing the Drive Enclosure
2
3
1
1
2
2
CXO7607A
CXO7620A
Front View Rear View
HSV controller pair Bus Address 07
Disk drive enclosures 16 Bus Addresses 0106
Disk drive enclosures 712 Bus Addresses 0813
Figure 14: 12-Drive enclosure Enterprise Storage System
Enterprise Virtual Array Drive Enclosure User Guide 15
Introducing the Drive Enclosure
Enclosure Major Components
The major components of the enclosure are:
The I/O modules that are the interface between the drives and the host controllers
(see Chapter 3, "FC-AL I/O Modules").
The disk drives that are the Enterprise Storage System storage devices
(see Chapter 4, "Disk Drives").
The power supplies that convert an AC input voltage into DC voltages for
enclosure operation (see Chapter 5, "Enclosure Power and Cooling").
The blowers that cool the enclosure by drawing air in from the front of the
enclosure and exhausting it out the rear (see Chapter 5, "Enclosure Power and
Cooling").
The environmental monitoring unit (EMU) that constantly monitors the operation
of the enclosure and the elements and displays element status. Whenever the EMU
detects a condition that could affect operation, it not only generates a local alarm,
but also reports the condition to the controller. The purpose, function, and
operation of this complex element is fully described in Enterprise Virtual Array
Drive Enclosure EMU User Guide.
The drive enclosure is a 2.125-Gb, dual loop, 14-drive enclosure. See Table 11 for a
list of the major elements.
Table 11: 14-Drive Enclosure Major Elements
Dual-Loop I/O module A Power Supplies: 2 each
AC power cords: 2 each
Dual-Loop I/O module B
Blowers: 2 each
2 Gb transceivers: 4 each
50 micron, 2 m (6.6 ft) multimode cables: 4 each
Drive Blanks: 14 each
16 Enter prise Virtual Array Drive Enclosure User Guide
Introducing the Drive Enclosure
Drive Enclosure Features
CAUTION: The FC-AL enclosure supports only Compaq supplied FC-AL drives.
Installing a parallel SCSI drive creates an error condition.
The 14-drive enclosure mounts in a rack with a 3U (5.25 inch or 133.35 mm) vertical
opening. The rack hole pattern must conform to the EIA, formerly RETMA, standard.
CAUTION: The individual drive power consumption must be less than 24 W.
To ensure proper cooling, all drive bays must have either a drive or drive blank
installed.
The enclosure provides several features, including:
Replacing disk drives, the environmental monitoring unit (EMU), blowers, and
power supplies does not interrupt data transfers. These elements are
hot-pluggable.
An element with a port-wine-colored latch, tab, or handle is hot-pluggable.
CAUTION: Connecting or disconnecting an I/O module, transceiver, or fiber cable
may interrupt data transfers on the associated loop. Data transfers on the other loop
are not affected.
The FC-AL drive enclosures do not support the following storage devices:
Tape drives
CD-ROMs
Solid state drives
The enclosure has guides that ensure the drives, EMU, I/O module, and power
supplies (the enclosure elements) align and properly mate with the backplane
connectors. A blower guide post ensures that the blower properly mates with the
power supply. The elements and the metal enclosure provide electromagnetic
interference (EMI) suppression and control air flow within the enclosure.
Enterprise Virtual Array Drive Enclosure User Guide 17
Introducing the Drive Enclosure
FC-AL Buses
Each drive enclosure is connected to two independent, external FC-AL buses, or loops
through I/O module A and I/O module B. The HSV controller establishes these loops.
The I/O modules establish the internal enclosure buses and all the drives connect to
both loop A and loop B. I/O module A connects to loop A and I/O module B connects
to loop B.
For detailed information about the FC-AL buses, see Chapter 2, "Configuring the
FC-AL Disk Drive Enclosure" and Chapter 3, "FC-AL I/O Modules."
High Availability
The high-availability enclosure features are a function of the number of operational
blowers and power supplies. One operational power supply and one operational
blower are all that is required to keep the enclosure fully functional.
Blowers
All enclosures have two blowers. If one blower fails, the other blower automatically
operates at a higher speed. Therefore, the enclosure is operational as long as there is a
single operational blower.
Power Supplies
The FC-AL enclosure uses the redundant power supply configuration (two power
supplies). This prevents the failure of a single power supply from disabling the
enclosure. A single power supply can support all enclosure operations.
CAUTION: To ensure proper enclosure cooling, to provide complete power
redundancy, and to eliminate the enclosure power supplies as possible single points of
failure, each supply connects to a different rack power distribution circuit. Each circuit
is controlled by a power distribution unit (PDU) that connects to a different building AC
power distribution circuit.
Data Integrity
Data integrity could be compromised if data transfers occur when there is no DC
power to the I/O module or the drives. To avoid this condition, the power pins on these
elements are longer than the data pins. This ensures that power is always present when
a data transfer occurs.
18 Enter prise Virtual Array Drive Enclosure User Guide
Introducing the Drive Enclosure
Status Monitoring and Display
The major status monitoring capabilities of these enclosures include:
Displaying the enclosure status on the enclosure icons
Displaying the blower, power supply, EMU, drive, and I/O module status on the
element LEDs
Detecting the installation of blowers, power supplies, drives, or I/O modules
Detecting the removal of blowers, power supplies, drives, or I/O modules
Sensing enclosure internal temperatures
Sensing power supply voltage, current, and total power
Sensing ambient temperature
NOTE: The ambient temperature is the temperature at the enclosure air intake or the room
temperature.
Enterprise Virtual Array Drive Enclosure User Guide 19
Introducing the Drive Enclosure
Enclosure Layout
The drives mount in the bays in the front of the enclosure (see Figure 15). These bays
)
are numbered from the left (bay to the right. The common method of referring to a
drive is by the bay number. The drive in bay is drive 1, the drive in bay is drive 8,
and so forth.
NOTE: There is no direct correlation between the bay number and loop ID. See Enterprise
Virtual Array Drive Enclosure EMU User Guide for more information about the enclosure loop
IDs.
Q.
The enclosure status icons are located in the lower-right, front corner
1
3
5
7
2 9
4 11
6 13
8
10
12 15
14
CXO7164A
to I Drive Bays Q Enclosure Status Icons (see the
section titled "Enclosure Status
Icons")
Figure 15: 14-Drive enclosure bay numbering
110 Enter prise Virtual Array Drive Enclosure User Guide
Introducing the Drive Enclosure
Enclosure Status Icons
The enclosure status LEDs are located on the enclosure backplane. These LEDs
illuminate the status icons (see Table 12) in the front, lower-right corner of the
Q,
enclosures (see Figure 15).
Table 12: Enclosure Status Icon Displays
Icon Of f On Flashing
EMU "Heartbeat" Icon (green LED)
Power Icon (green LED)
Enclosure Status Icon (orange LED
Major Enclosure Elements
The elements required for proper operation of an enclosure include:
An EMU
Two power supplies
Two blowers
An I/O module A
An I/O module B
A drive or drive blank in each bay
Enterprise Virtual Array Drive Enclosure User Guide 111
Introducing the Drive Enclosure
Element Replacement Methods
The method used to replace an element depends upon the following factors:
Does the controller support replacing elements with power applied?
The primary factor in determining the replacement method used is what the
controller supports.
Compaq identifies hot-pluggable elements with a port wine-colored latch, tab, or
handle.
Review the controller documentation to ensure that the controller supports
replacing an element with power applied.
Can element replacement affect FC-AL bus operation?
When the element being replaced does not interrupt data transfer or affect the
operation of any other element, and the controller supports replacement with
power applied, the element is hot-pluggable.
CAUTION: Replacing an I/O module, a fiber optic cable, or a transceiver will interrupt
data transfers on a loop. To ensure at least one loop is operational, only replace one of
these elements per drive enclosure at a time
IMPORTANT: Even though an individual element meets all the hot-pluggable or pluggable
criteria, if the controller does not support replacing a customer replaceable unit (CRU) with
power applied, or if replacing the element interrupts data transfers, you must disconnect the
drive enclosure from the affected loop before replacing.
Are there any personal safety issues involved?
Whenever there is an issue involving personal safety, such as an electrical hazard,
then the element replacement requires removing power from the enclosure.
Replacing the FC-AL enclosure elements does not involve electrical hazards.
Are special tools, techniques, or training required?
When replacing an element does not require special tools, techniques, or training
(such as system configuration), the element is a CRU.
When replacing an element requires special tools, techniques, or training, then the
unit is a field replaceable unit (FRU). Only qualified, Compaq approved service
providers are authorized to replace FRUs.
Based on these definitions, the Enterprise Storage System drive enclosure
elements are CRUs.
112 Enter prise Virtual Array Drive Enclosure User Guide
2
Configuring the FC-AL
Disk Drive Enclosure
IMPORTANT: The configuration rules in the Enterprise Virtual Array Initial Setup User Guide
have precedence over the rules in this publication.
This chapter provides an overview of the FC-AL drive enclosure subsystem
configuration. This overview includes considerations and the procedures for
configuring a subsystem for operation in a dual-loop, multiple-enclosure Enterprise
Storage System configuration.
Basic Enterprise Storage System Configurations
The basic Enterprise Storage System configuration consists of a rack, a controller
enclosure with a pair of controllers, and 6 or 12 drive enclosures mounted in a rack.
The Enterprise Virtual Array Initial Setup Guide defines these Compaq supported
configurations. The location of the controller enclosure (see Figure 21) is in the
middle of the rack
Enterprise Virtual Array Drive Enclosure User Guide 21
Configuring the FC-AL Disk D rive Enclosure
2
1
2
CXO7607A
Figure 21: Typical rack configurationfront view
The operation and function of both the A and B FC-AL I/O modules are identical. All
I/O modules have two bidirectional ports that can function as either an input or an
output port. The input port connects to the controller or the previous drive enclosure in
the loop, while the output port connects to the next enclosure on the loop, either a disk
drive or a controller.
22 Enter prise Virtual Array Drive Enclosure User Guide
Configuring the FC-AL Disk Drive Enclosure
There are many possible configurations and cable routing schemes defined for the
Enterprise Storage System. To ensure proper operation, Compaq recommends
identifying the transceivers using the numbering system shown in Figure 22. The
Enterprise Virtual Array Initial Setup User Guide clearly defines the interconnections
Loop B Top Port Loop A Top Port
4 2
3 1
CXO7461A
Loop B Bottom Port Loop A Bottom Port
Figure 22: I/O module port (transceiver) locations
Fiber Optic Components
The Enterprise Storage System Fibre Channel implementation is a 2 Gb (2.125 Gbps)
short wavelength. The fibre optic components are:
The Enterprise Storage System 2 Gb transceiver is internationally approved as a
Class 1 laser safe product that features optical emission levels that do not harm the
human eye.
The orange, 50-micron fiber optic cable is available in multiple lengths.
Table 21 defines the fiber optic transceivers and cables furnished with the Fibre
Channel drive enclosures. For more information about this product, including
additional cables and transceivers use the procedures described in the "About this
Guide" to access the Compaq product website.
Enterprise Virtual Array Drive Enclosure User Guide 23
Configuring the FC-AL Disk D rive Enclosure
IMPORTANT: The controller enclosure to drive enclosure cables are supplied with the
controller.
Table 21: 2 Gb Fiber Optic Components
Short Wavelength Transceiver
CXO7435A
Electrical-to-Fiber Optic Interface Compliance:
Fibre Channel FC-PH-2 physical layer option 100-M5-SN-1
Transfer rate: 2.125 Gb
Cable diameter: 50 m diameter
Laser frequency and type: 780 nm (non-OFC)
Optical connector interface: Dual LC
Quantity required: 2 per I/O module (4 per enclosure)
Fiber Optic Cable Assembly
CXO7436A
Small Form Factor (LC-to-LC) connectors:
Duplex, 2 conductor, 50 micron (50 m) multimode, 50/125, 1.6 zip
Length: 2 m (6.6 ft)
Quantity required: 2 per I/O module
24 Enter prise Virtual Array Drive Enclosure User Guide
Configuring the FC-AL Disk Drive Enclosure
To ensure optimum operation, the fiber optic components (that is, the transceivers, the
fiber optic cable connectors, and the fiber within the cable) require protection from
contamination and mechanical hazards. Failure to provide this protection can reduce
the amount of light passing through a component, thereby degrading operation.
Actions that can avoid degradation include:
To avoid breaking the fiber within the cable, do not:
-- Kink the cable.
-- Use a cable bend-radius of less than 30 mm (1.18 inches).
To avoid deforming, or possibly breaking the fiber within the cable, do not place
heavy objects on the cable.
To avoid contaminating the optical connectors:
-- Do not touch the connectors.
-- Never leave the connectors exposed to the air.
-- Install a dust cover on each transceiver and fiber cable connector when they
are disconnected.
If an open connector is exposed to dust, or there is any doubt about the cleanliness of
the connector, clean the connector as described in Appendix C, "Protecting Fiber
Optic Connections."
Loop Configurations
The Compaq supported configuration is a dual-loop with either 6 or 12 drive
enclosures per loop. This configuration eliminates single-points-of-failure. Limiting
the total number of enclosures reduces the transmission delays inherent in longer
loops.
CAUTION: Keeping the loops completely separate ensures that the failure of a single
component (controller, I/O module, transceiver, or cable) does not stop data
transmissions to all the active drives.
Therefore, only connect the loop A cables to an I/O module A and the loop B cables to
an I/O module B.
Enterprise Virtual Array Drive Enclosure User Guide 25
Configuring the FC-AL Disk D rive Enclosure
Initializing the Fibre Channel Loop
Initializing the Fibre Channel loops automatically assigns an AL_PA to the drives in
each enclosure. Although Compaq recommends assigning a specific group of
sequential loop IDs to each enclosure (see Enterprise Virtual Array Drive Enclosure
EMU User Guide) this may not always be possible for several reasons.
The following sections are a general description of the loop initialization process.
Enterprise Storage System Loop Initialization
In an Enterprise Storage System configuration the HSV element manager graphical
user interface (GUI) provides the means for initializing the loops.
Verifying Enclosure Operation
All the elements in the enclosure begin operating when power is applied. Check the
enclosure status LEDs in the front, lower right corner (see Figure 23). If the display
is not exactly as shown there is an error condition. Check the drive status LEDs on the
front, and the EMU, power supplies, blowers, and I/O module status LEDs on the rear
(see Table 22) to determine the defective element.
26 Enter prise Virtual Array Drive Enclosure User Guide
Configuring the FC-AL Disk Drive Enclosure
NOTE: Either of the drive displays in Figure 23 indicates a properly functioning disk.
CXO7486A
Figure 23: Typical operational LED status displays--enclosure front
See Table 22 for the location and state of the status LEDs on the rear of the
enclosure.
Table 22: Operational LED Status DisplayEnclosure Rear View
CXO7658A
Enterprise Virtual Array Drive Enclosure User Guide 27
Configuring the FC-AL Disk D rive Enclosure
Table 22: Operational LED Status DisplayEnclosure Rear View (Continued)
EMU LEDs and Icons
The enclosure power (both the +5 VD C and +12 VDC) is
present and correct.
There are NO enclosure faults.
I/O Module A and I/O Module B LEDs
The upper port is operational, the power is correct, and the lower port is
operational.
There is a data transfer on the upper port, the power supply is operational,
and the lower port is operational.
The upper port is operational, the power is correct, and there is a data
transfer on the lower port
There is a data transfer through this enclosure to another enclosure, and
the power is correct
Power Supply and Blower LEDs
Both the power supply and the blower are operational.
28 Enter prise Virtual Array Drive Enclosure User Guide
3
FC-AL I/O Modules
This chapter describes the two I/O modules (see Figure 31 and Figure 32) that are
the interface between the drive enclosure elements and the host controller. They route
data to and from the drives using Loop A and Loop B, the dual-loop configuration.
CXO7421A CXO7420A
Figure 31: I/O module B Figure 32: I/O module A
The Compaq Enterprise Storage System only supports dual-controller, dual-loop
operation. Each controller is connected to both the I/O module A and I/O module B in
each drive enclosure.
Enterprise Virtual Array Drive Enclosure User Guide 31
FC-AL I/O Modules
I/O Modules
The A and B I/O modules are similar in appearance and function in the same manner,
but they are not interchangeable. The physical differences between the modules
ensure that you can install only:
The A module (, Figure 33) at the right end of the enclosure, behind
drive bay 1.
The B module (, Figure 33) at the left end of the enclosure, next to the EMU.
2 1
CXO7462A
I/O module A
I/O module B
Figure 33: I/O module locations
32 Enter prise Virtual Array Drive Enclosure User Guide
FC-AL I/O Modules
Fibre Channel Loop Components
The I/O modules are major components in the Fibre Channel loop. Each module has
two ports that can both transmit and receive data or bidirectional operation. Activating
a port requires connecting a transceiver to the port. The FC-AL enclosures use short
wavelength, fiber optic transceivers with 50 micron (m) diameter, multimode fiber
cables. The port function depends upon the loop (see Figure 34).
Loop B Top Port Loop A Top Port
4 2
3 1
CXO7461A
Loop A Bottom Port
Loop B Bottom Port
Figure 34: Input and output ports
CAUTION: To protect the connectors, always install the dust covers whenever a
transceiver or a fiber cable is disconnected.
When connecting a transceiver or giver cable, remove, but do not discard, the dust
covers or dust caps.
Enterprise Virtual Array Drive Enclosure User Guide 33
FC-AL I/O Modules
I/O Module Power
The I/O module +5 VDC power sensing device protects the modules against
overcurrent conditions. If the +5 VDC current exceeds 2.5 A rms (nominal), the
sensor opens, removing the +5 VDC input from the I/O module, thereby disabling the
module until:
The defective I/O module is replaced.
The overcurrent condition no longer exists.
NOTE: A disabled I/O module cannot transfer data and disconnects all the drives in the
enclosure from the loop and also disconnects the "downstream" enclosures from the loop.
I/O Module Status Displays
The three green LEDs on the A and B I/O modules display the status (see Figure 35).
The LED status displays for an operational I/O module are shown in Table 31.
Table 32 shows the status displays for a nonoperational I/O module.
Top port status LED
Power status LED
Bottom port status LED
1
2
3
CXO7488A
Figure 35: I/O module status LEDs
34 Enter prise Virtual Array Drive Enclosure User Guide
FC-AL I/O Modules
Table 31: Operational I/O Module LED Status Displays
Top Port--FC-AL signal detected
Power--Flashes for one minute. The LED is On constantly; Bottom
Port--FC-AL signal detected.
This display can occur during the first minute after initial power application.
Top Port--FC-AL signal detected
Power--Present
Bottom Port--FC-AL signal detected
This display can occur one minute after the initial application of power.
When the locate function is active all three LEDs flash in synchronization.
IMPORTANT: The locate function overrides all other LED functions. Therefore, it
is possible there is an error.
Table 32: Nonoperational I/O Module Status Displays
Top Port--FC-AL signal detected
Power--Present (After one minute the power LED will be On constantly)
Bottom Port--No FC-AL signal detected
Check transceiver and fiber cable connections.
Top Port--No FC-AL signal detected
Power--Present
Bottom Port--FC-AL signal detected
Check transceiver and fiber cable connections.
Top Port--EMU detected possible transceiver problem
Power--Present
Bottom Port--FC-AL signal detected
Check transceiver and fiber cable connections.
Top Port--FC-AL signal detected
Power--Present
Bottom Port--EMU detected possible transceiver problem
Check transceiver and fiber cable connections.
Enterprise Virtual Array Drive Enclosure User Guide 35
FC-AL I/O Modules
Table 32: Nonoperational I/O Module Status Displays (Continued)
No I/O module power
I/O module is nonoperational
Check power supplies. If power supplies are operational, replace I/O
module.
36 Enter prise Virtual Array Drive Enclosure User Guide
4
Disk Drives
This chapter describes the features, functions, and characteristics of Compaq
hot-pluggable disk drives. The Compaq-supplied disk drives conform to the enclosure
initiated Enclosure Services Interface (ESI).
The 14-drive enclosure supports only 1-inch, 3.5-inch form factor drives that consume
less than 24 W of power.
CAUTION: Controlling air flow within the enclosure requires installing a drive or a
drive blank in each drive bay.
To avoid overheating, never remove more than one drive or drive blank from an
operating enclosure at the same time.
To prevent overheating and ensure proper operation, Compaq recommends installing
a drive of equal or greater capacity, or a drive blank, as soon as possible.
Enterprise Virtual Array Drive Enclosure User Guide 41
Disk Drives
Drive Status Reporting
The three status icons (see Figure 41) on the front of each drive define the drive
operational status. The LEDs that illuminate these icons are located on the enclosure
backplane. To determine the drive status, you must observe the icons described in the
following sections.
CXO7167A
Figure 41: Drive icons
The following sections describe the purpose of each of the icons.
Drive Activity Icon
The green LED for this icon is controlled by the disk drive. Neither the
HSV controller nor the EMU can control the LED. This prevents this LED
from Flashing when the locate function is active.
This LED is off when there is no bus activity.
42 Enter prise Virtual Array Drive Enclosure User Guide
Disk Drives
Drive On-line Icon
The green LED for this icon is controlled by the disk drive. Neither the
HSV controller nor the EMU can control the LED. This prevents this LED
from Flashing when the locate function is active.
The LED may be Off when:
There is no controller on the bus
+5.1 VDC is not available
The drive is not properly installed in the enclosure
Drive Failure Icon
The orange LED flashes in synchronization with the other two LEDs in
response to the EMU locate command.
Depending on the host controller, the LED for this icon can flash when the controller
detects an error condition.
Drive Status
The two green and one red LEDs are either On, Off, or Flashing. In some
configurations, the host controller can control the status LEDs. The operational drive
LED status displays are shown in Table 41. See Table 42 for the nonoperational
drive status LED displays.
CAUTION: The Drive Activity and the on-line LED are controlled by the drive, and
cannot be overridden by the Enterprise Storage System controller. The result is the
status of the LED being either Off, Flashing, or On.
A LED may flash either slowly or rapidly to assist in identifying a defective drive.
Enterprise Virtual Array Drive Enclosure User Guide 43
Disk Drives
Table 41: Operational Drive Status Displays
This display at initial startup may mean the operational drive is not
being accessed.
If the display does not change within a few minutes, the drive is
nonoperational and should be replaced.
DO NOT replace unless the system has completed initial startup and
the other drives are operational.
The operational drive is not being accessed.
The drive locate function is active.
DO NOT replace the drive while the locate function is active.
NOTE: Depending on controller revision level, the Drive Activity LED
may be either On, Off, or Flashing.
The Online LED may be either Flashing slowly or On.
The Drive Failure LED may be either On or Flashing slowly.
The drive is operational and active.
The drive is configured as part of an array.
DO NOT replace an active drive.
44 Enter prise Virtual Array Drive Enclosure User Guide
Disk Drives
Table 42: Nonoperational Drive Status Displays
The drive is nonoperational.
There is no power to the drive.
Dr ive may be replaced.
Recommended Corrective Actions:
1. Check power supplies for proper operation.
2. Replace if defective.
3. Replace drive.
There is a drive error and the drive is not active.
Check the storage system graphical user interface (GUI) for a
definition of the problem.
Dr ive may be replaced
Recommended Corrective Actions:
1. Verify drive loop continuity.
2. Replace drive.
Drive Power
The drive voltage backplane sensors (+5.1 VDC and +12.1 VDC) can detect a drive
overcurrent condition. When there is a drive overcurrent condition, the sensor
disconnects the voltage from the drive to prevent writing data to the drive. The drive is
disabled until one of the following conditions occurs:
The defective drive is replaced.
The overcurrent condition no longer exists.
Enterprise Virtual Array Drive Enclosure User Guide 45
Disk Drives
Drive Blank
To maintain the proper enclosure air flow, there must be a drive or a drive blank in
each drive bay. The function of the drive blanks (see Figure 42) is to control air flow
within a bay.
CXO6824A
Figure 42: Drive blank
Replacing a Drive or Drive Blank
To replace a disk, you must complete the procedures outlined in Chapter 6,
"Replacing CRUs."
The disk replacement kit contains detailed replacement instructions.
CAUTION: Never remove more than one drive at a time, as this can cause the
enclosure to overheat.
To prevent overheating and ensure proper operation, Compaq recommends installing
a drive of equal or greater capacity, or a drive blank, as soon as possible.
NOTE: For the latest information and instructions about Compaq FC hard drives, such as
compatibility and installation instructions, refer to "About this Guide."
46 Enter prise Virtual Array Drive Enclosure User Guide
5
Enclosure Power and Cooling
This chapter describes the function and general operation of the enclosure power
supplies and blowers. Figure 51 identifies the major power supply assembly
components.
1
5
6
2
3 4 5
CXO7489A
Power supply Assembly M odule Latch (port-wine colored)
Power supply and Blower Status LED Blower Tabs (port-wine colored)
AC Input Connector with Bail Blower Element
Figure 51: Power supply and blower assembly components
Enterprise Virtual Array Drive Enclosure User Guide 51
Enclosure Power and Cooling
Enclosure Power
The two power supplies mount in the rear of the enclosure. The supplies are
auto-ranging and operate on a country-specific AC input voltage of 202 to 240 VAC
10%, 50 to 60 Hz, 5%, (188 to 264 VAC, 47 to 63 Hz).
The DC outputs of this power supply are:
+5.1 VDC for the EMU, I/O module, backplane, and drives
+12.1 VDC for the drives
+12.5 VDC for the blower
The nominal output of each power supply is 499 W, with a peak output of 681 W. A
single power supply can support an enclosure with a full complement of disks,
blowers, EMU, and I/O module.
The power supply circuitry provides protection against:
Overloads
Short circuits
Overheating
Power supply status and diagnostic information is reported to the EMU with voltage,
current, and temperature signals.
See Appendix B, "Specifications" for the enclosure power specifications.
Temperature Sensing
The power supply temperature sensor provides a temperature range signal to the
EMU. The EMU can use this signal to set the blower speed.
The power supply internal temperature can also set the speed of the blower. The higher
the power supply temperature, the faster the speed of the blower. Should the power
supply temperature exceed a preset value, the power supply automatically shuts down.
Blower Interface
The blower mounts on the rear of the power supply. A power supply connector is the
interface between the blower and the enclosure for:
Blower speed control to the blower
Blower speed to the EMU through the power supply
52 Enter prise Virtual Array Drive Enclosure User Guide
Enclosure Power and Cooling
Power supply high speed enable
Blower operating voltage
Blowers
The power supply-mounted blowers cool the enclosure by circulating air through the
enclosure and the elements. The rate at which air moves (the air flow) determines the
amount of cooling and is a function of blower speed (rpm). These blowers, under the
control of the 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 air flow.
Should a blower be operating too slowly or stopped (a "blower failure"), internal
circuitry automatically causes the operational blower to operate at a higher speed.
Simultaneously, the error condition is reported to you in several ways, including the
power supply LED, the audible alarm, the enclosure fault LEDs, and the EMU
alphanumeric display.
Should both blowers fail, the power supplies automatically shutdown.
NOTE: The failure of a power supply +12.5 VDC circuit disables the associated blower.
| EK-52DRV-UA
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