Dell DAE2-ATA, CLARiiON DAE2 Hardware Reference Manual
EMC CLARiiON
2-Gigabit Disk-Array Enclosure (DAE2)
FC and ATA Models
HARDWARE REFERENCE
P/N 014003048
REV A05
EMC Corporation
Corporate Headquarters
Hopkinton, MA 01748
1
-508-435-1000
www.EMC.com
:
-9103
Copyright © 2002-2004 EMC Corporation. All rights reserved.
Published January, 2004
EMC believes the information in this publication is accurate as of its publication date. The
information is subject to change without notice.
THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS IS." EMC CORPORATION
MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TO THE
INFORMATION IN THIS PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Use, copying, and distribution of any EMC software described in this publication requires an
applicable software license.
Trademark Information
EMC2, EMC, CLARiiON, Navisphere, and PowerPath are registered trademarks and Access Logix, EMC ControlCenter, FLARE, MirrorView,
SAN Copy, and SnapView are trademarks of EMC Corporation.
All other trademarks used herein are the property of their respective owners.
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2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Regulatory Notices Product Type(s) KAE, KLE
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Testing was done with shielded cables. Therefore, in order to comply with the FCC regulations, you must use shielded
cables with your installation. Changes or modifications to this unit not expressly approved by the party responsible
for compliance could void the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense.
This Class A digital apparatus complies with Canadian ICES-003
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada
Manufacturer’s Declaration of Conformity - CE mark
This equipment has been tested and found to comply with the requirements of European Community Council
Directives 89/336/EEC, 73/23/EEC, and 98/68/EEC relating to electromagnetic compatibility and product safety
respectively.
This product complies with EN55022, CISPR22 and AS/NZS 3548 Class A.
This is a Class A product. In a domestic environment this product may cause radio interference in which case the user
may be required to take adequate measures.
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
iii
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2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Contents
Preface............................................................................................................................. ix
Warnings and Cautions......................................................................................... xiii
Chapter 1 About DAE2 Disk Enclosures
Introduction...................................................................................... 1-2
Midplane.................................................................................... 1-6
Front Bezel................................................................................. 1-6
Link Control Cards (LCCs)............................................................. 1-7
Disk Modules.................................................................................... 1-8
Disk Drives ................................................................................ 1-8
Drive Carrier ............................................................................. 1-8
Power Supply/System Cooling Modules .................................... 1-9
Chapter 2 Installing a DAE2
Requirements.................................................................................... 2-2
Site Requirements..................................................................... 2-2
Cabling Requirements.............................................................. 2-2
Installing a Disk Enclosure in a Cabinet....................................... 2-3
Warnings and Recommendations .......................................... 2-3
Setting Up an Installed Disk Enclosure........................................ 2-4
Powerup and Initialization........................................................... 2-12
Binding Disk Modules into RAID Groups................................. 2-13
Disk Configuration Rules and Recommendations ............ 2-13
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
v
Contents
Chapter 3 Servicing a DAE2
Monitoring Disk Enclosure Status ................................................ 3-2
Handling FRUs ................................................................................ 3-6
Power Issues and FRUs ........................................................... 3-6
Avoiding Electrostatic Discharge (ESD) Damage................ 3-6
Emergency Procedures (Without an ESD Kit)...................... 3-7
Precautions When Removing, Installing, or Storing FRUs 3-8
Replacing or Adding a Disk Module............................................ 3-9
Unlocking and Removing the Front Bezel.......................... 3-10
Removing a Disk Filler Module ........................................... 3-11
Removing a Disk Module...................................................... 3-11
Installing a Disk or Filler Module ........................................ 3-12
Installing and Locking the Front Bezel................................ 3-14
Replacing an LCC Module ........................................................... 3-15
Removing an LCC .................................................................. 3-15
Installing an LCC.................................................................... 3-16
Replacing a Power Supply/System Cooling Module .............. 3-20
Appendix A Technical Specifications
Enclosure Specifications ............................................................... A-2
Ac Power Requirements......................................................... A-2
Size and Weight ....................................................................... A-3
Drive Type ................................................................................ A-3
LCC FC-AL Interface .............................................................. A-3
Standards Certification and Compliance............................. A-4
Fibre Channel Related Standards.......................................... A-4
Operating Limits ............................................................................ A-5
Environmental Recovery........................................................ A-5
Shipping and Storage Requirements.................................... A-6
Appendix B Customer Support
Overview of Detecting and Resolving Problems ...................... B-2
Troubleshooting the Problem ....................................................... B-3
Before Calling the Customer Support Center ............................ B-4
Documenting the Problem ........................................................... B-5
Reporting a New Problem ............................................................ B-6
Sending Problem Documentation ............................................... B-7
Index................................................................................................................................ i-1
vi
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Figures
Figure
1-1 DAE2 .............................................................................................................. 1-2
1-2 DAE2 Front LED Display ............................................................................ 1-4
1-3 Disk Enclosure Rear View ........................................................................... 1-5
1-4 Disk Enclosure Rear Displays ..................................................................... 1-5
1-5 Disk Enclosure Front Bezel ......................................................................... 1-6
1-6 LCC Connectors and LEDs ......................................................................... 1-7
1-7 Disk Modules ................................................................................................ 1-8
1-8 Power/Cooling Module .............................................................................. 1-9
2-1 Setting the Enclosure Address (EA) .......................................................... 2-5
2-2 Plugging in the ac Line Cord ...................................................................... 2-6
2-3 Connecting DAE2 Power Cords ................................................................. 2-7
2-4 Connecting a Disk Enclosure to Another FC Device .............................. 2-8
2-5 Cabling Disk Enclosures Together — Two Fibre Channel Loops ......... 2-9
2-6 Cabling DAE2s Together — Four Fibre Channel Loops ...................... 2-10
2-7 Cabling Disk Enclosures Together —
Segregated Loop Configuration ............................................................... 2-11
3-1 Front Disk Enclosure and Disk Module Status Lights
(Bezel Removed) ........................................................................................... 3-2
3-2 Enclosure Address and Loop ID Indicators ............................................. 3-4
3-3 Power/Cooling Module Status Indicators ............................................... 3-4
3-4 LCC Status LEDs .......................................................................................... 3-5
3-5 Unlocking and Removing the Front Bezel .............................................. 3-10
3-6 Removing a Disk Filler Module (FC Disk Carrier Shown) ................... 3-11
3-7 Removing a Disk Module (FC Disk Carrier Shown) ............................. 3-12
3-8 Installing a Disk or Filler Module (FC Disk Carrier Shown) ............... 3-13
3-9 Installing and Locking the Front Bezel .................................................... 3-14
3-10 Removing a Copper Cable from an LCC ................................................ 3-15
3-11 Removing an LCC ...................................................................................... 3-16
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
vii
Figures
3-12 Installing an LCC ........................................................................................ 3-17
3-13 Reconnecting a Copper Cable to an LCC ................................................ 3-18
3-14 Connecting Disk Enclosures Together with Copper Cable .................. 3-19
3-15 Unplugging the ac Power Cord ................................................................ 3-20
3-16 Removing a Power/Cooling Module ...................................................... 3-21
3-17 Installing a Power/Cooling Module ........................................................ 3-21
3-18 Plugging in the Power Cord ...................................................................... 3-22
B-1 Problem Detection and Resolution Process .............................................. B-2
viii
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Preface
This manual is your primary source of information about EMC
2-gigabit disk-array enclosure (DAE2) hardware. It covers DAE2
models that use Fibre Channel disks, and DAE2-ATA models that
include Advanced Technology Attachment drives.
The DAE2 is often called a disk enclosure.
Audience This guide is part of the DAE2 documentation set, and is intended for
use by system administrators and others responsible for the
installation, setup, and maintenance of the product.
Readers of this guide are expected to be familiar with the following
topics:
◆ Storage-system operation
◆ Basic computer hardware safety and maintenance procedures.
Organization The information in this guide is organized as follows:
Chapter 1, About DAE2 Disk Enclosures, provides a descriptive
overview of the disk enclosure.
Chapter 2, Installing a DAE2, describes how to set up and power up
the enclosure(s) in your cabinet.
Chapter 3, Servicing a DAE2, provides instructions and procedures for
recognizing and replacing failed components.
Appendix A, Technical Specifications, lists operating limits, shipping
and storage requirements, and technical specifications.
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
ix
Preface
Related
Documentation
Cabinet Setup Guide for the 40U Cabinet (P/N 014003099)
Site Preparation and Unpacking Guide for the 40U Cabinet
(P/N 014003100)
EMC Rails and Enclosures Installation Guide for 19-Inch NEMA Cabinets
(P/N 014003082)
EMC 2-Gigabit Disk Enclosure (DAE2) Setup Guide (P/N 014003104)
EMC Navisphere Manager Revision 6.X Administrator’s Guide
(P/N 069001161)
EMC CLARiiON CX300, CX500, and CX700 Storage Systems
Configuration Planning Guide (P/N 300-001-273)
EMC Storage System CX400-Series and CX600-Series Configuration
Planning Guide (P/N 014003113)
EMC Fibre Channel Storage System CX200-Series
Configuration Planning
Guide (P/N 014003115)
EMC Navisphere Version 6.X Security Administrator’s Guide
(P/N 069001124)
EMC Installation Roadmap for CX-Series and FC-Series Storage Systems
(P/N 069001166)
Conventions Used in
This Guide
!
EMC Storage Systems CX-Series Disk and FLARE OE Matrix
(P/N 014003111)
Navisphere® is a member of the EMC ControlCenter™ family of products.
EMC uses the following conventions for notes, cautions, warnings,
and danger notices.
A note presents information that is important, but not hazard-related.
CAUTION
A caution contains information essential to avoid data loss or
damage to the system or equipment. The caution may apply to
hardware or software.
x
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Preface
WARNING
A warning contains information essential to avoid a hazard that can
cause severe personal injury, death, or substantial property damage
if you ignore the warning.
DANGER
A danger notice contains information essential to avoid a hazard
that will cause severe personal injury, death, or substantial property
damage if you ignore the message.
Typographical Conventions
This manual uses the following format conventions:
This
typeface
Indicates text (including punctuation) that you type
verbatim, all commands, pathnames, filenames,
and directory names. It indicates the name of a
dialog box, field in a dialog box, menu, menu
option, or button.
This typeface Represents variables for which you supply the
values; for example, the name of a directory or file,
your username or password, and explicit
arguments to commands.
This
typeface
x > y
Represents a system response (such as a message or
prompt), a file or program listing.
Represents a menu path. For example, Operations
> Poll All Storage Systems tells you to select Poll
All Storage Systems on the Operations menu.
[ ]
|
Encloses optional entries.
Separates alternative parameter values; for
example:
LUN-name | LUN-number means you can use either
the LUN-name or the LUN-number.
Finding Current
Information
The most up-to-date information about the DAE2 is posted on the
EMC Powerlink website. We recommend that you download the
latest information before you install or service your DAE2. If you
purchased this product from an EMC reseller and you cannot access
Powerlink, the latest product information should be available from
your reseller.
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
xi
Preface
To access EMC Powerlink, use the following link:
http://powerlink.emc.com
After you log in, select Support > Document Library and find the
following:
◆ The FLARE™ software release notes
◆ The latest version of this reference.
◆ EMC Installation Roadmap for CX-Series and FC-Series Storage
Systems, which provides a checklist of the tasks that you must
complete to install your storage system in a storage area network
(SAN) or direct attach configuration.
Where to Get Help For questions about technical support and service, contact your
service provider.
If you have an EMC service contract, contact EMC Customer Service
at:
United States: (800) 782-4362 (SVC-4EMC)
Canada: (800) 543-4782 (543-4SVC)
Worldwide: (800) 497-7901
Follow the voice menu prompts to open a service call, then select
CLARiiON Product Support.
Sales and Customer
Service Contacts
For the list of EMC sales locations, please access the EMC home page
at:
http://www.emc.com/contact/
For additional information on the EMC products and services
available to customers and partners, refer to the EMC Powerlink Web
site at:
http://powerlink.emc.com
Your Comments Your suggestions will help us continue to improve the accuracy,
organization, and overall quality of the user publications. Please send
a message to techpub_comments@emc.com with your opinions of
this guide.
xii
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
The following warnings and cautions pertain throughout this guide.
WARNING Trained service personnel only.
Ground circuit continuity is vital for safe operation of the machine.
Never operate the machine with grounding conductors disconnected.
Remember to reconnect any grounding conductors removed for or
during any installation procedure.
ATTENTION Resérvé au personnel autorisé.
Un circuit de terre continu est essentiel en vue du fonctionnement
sécuritaire de l'apareil. Ne jamais mettre l'appareil en marche lorsque
le conducteur de mise a la terre est débranché.
Warnings and
Cautions
WARNUNG Nur für Fachpersonal.
STROMSTREUVERLUST: Gerät muss geerdet werden, bevor es am
Stromnetz angeschlossen wird.
!
CAUTION
Service personnel are advised to exercise great care at all times
when working on the unit. Remember to:
◆ Remove rings, watches, or other jewelry and neckties before
you begin any procedures.
◆ Use caution near any moving part and any part that may start
unexpectedly such as fans, motors, solenoids, and so on.
◆ Always use the correct tools for the job.
◆ Always use the correct replacement parts.
◆ Keep all paperwork, including incident reports, up to date,
complete, and accurate.
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
xiii
Warnings and Cautions
Static Precautions EMC incorporates state-of-the-art technology in its designs, including
the use of LSI and VLSI components. These chips are very susceptible
to damage caused by static discharge and need to be handled
accordingly.
!
Replacing a Lithium Battery
CAUTION
Before handling printed-circuit boards or other parts containing
LSI and/or VLSI components, observe the following precautions:
◆ Store all printed-circuit boards in antistatic bags.
◆ Use a ground strap whenever you handle a printed-circuit
board.
◆ Unless specifically designed for nondisruptive replacement,
never plug or unplug printed-circuit boards with the power on.
Severe component damage may result
Some EMC products include lithium batteries that only trained
personnel should change or replace.
WARNING
Danger of explosion if battery is incorrectly replaced. Replace only
with the same or equivalent type recommended by the equipment
manufacturer. Discard used batteries according to manufacturer's
instructions.
xiv
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Invisible Body Tag
1
About DAE2 Disk
Enclosures
Topics in this chapter include
◆ Introduction........................................................................................1-2
◆ Link Control Cards (LCCs)...............................................................1-7
◆ Disk Modules......................................................................................1-8
◆ Power Supply/System Cooling Modules ......................................1-9
About DAE2 Disk Enclosures
1-1
About DAE2 Disk Enclosures
Introduction
The DAE2 (2-gigabit disk-array enclosure) is a highly available,
high-performance, high-capacity storage system that uses a Fibre
Channel Arbitrated Loop (FC-AL) as its interconnect interface. An
enclosure connects to another DAE2 or a processor such as a CX700,
CX500, or CX300, and is managed by storage-system software in
RAID (Redundant Array of Independent Disk) configurations. The
enclosure is only 3U (5.25 inches) high, but can include 15 hard disk
drive/carrier modules. Its modular, scalable design allows for
additional disk storage as your needs increase. The examples and
illustrations in this manual show the rackmounted DAE2 in a
standard 40U EMC cabinet.
EMC produces two types of DAE2. The standard version includes
high-performance Fibre Channel disk drives and FC-AL link control
cards to manage them. The DAE2-ATA (Advanced Technology
Attachment) version uses economical, high-capacity ATA disk drives
and FC-to-ATA link control cards to manage the disks and provide an
interface between the FC-AL and the drives.
Disk
Drive
(0 - 14)
Front
Bezel
Figure 1-1 DAE2
1-2
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Rackmount
Cabinet
EMC2164
About DAE2 Disk Enclosures
Any DAE2 can support up to fifteen 3.5-inch disk modules. Simple
serial cabling provides easy scalability. You can interconnect DAE2s
to Fibre Channel loops (sometimes called busses) to form a large disk
storage system; the number and size of loops depends on the
capabilities of your storage processor. Highly available
configurations require at least one pair of physically independent
loops (A and B sides of Loop 0, sharing the same dual-port disks).
Other configurations use two, three, or four loops. You can place the
disk enclosures in the same cabinet, or in one or more separate
cabinets. High-availability features are standard.
The DAE2 includes the following components:
◆ A sheet-metal enclosure with a midplane and front bezel
◆ Two link control cards (LCCs)
◆ As many as 15 disk modules
◆ Two power supply/system cooling modules
The power supply and system cooling components of the power/cooling
modules function independently of each other, but the assemblies are
packaged together into a single field-replaceable unit (FRU).
Any unoccupied disk module slot has a filler module to maintain air
flow.
The LCCs, disk modules, power supply/system cooling modules,
and filler modules are field-replaceable units (FRUs), which you can
add or replace without tools while the array is powered up.
Standard DAE2 disk modules are FC-AL compliant and support
dual-port FC-AL interconnects through the two LCCs and their
cabling. ATA disk modules include dual-port ATA interconnects; the
FC-to-ATA link control cards provide the bridge between Fibre
Channel and ATA signals.
You can integrate and connect FC and ATA enclosures within a storage
system, but you cannot mix ATA and fibre components within a DAE2.
Standard link control cards will not recognize ATA disk drives, and ATA link
control cards will not recognize Fibre Channel disks.
The system can continue running with one operating power supply
and a single functional LCC. At least three of the four system cooling
blowers must be running correctly for continuous operation.
Figures 1-2 through 1-4 show the disk enclosure components. Details
on each component accompany the figures. Where the enclosure
Introduction
1-3
About DAE2 Disk Enclosures
(
)
provides slots for two identical components, the components are
called component-name A or component-name B, as shown in the
illustrations.
For increased clarity, the following figures depict the disk enclosure outside
of the rack cabinet. Your disk enclosure may be installed in a rackmount
cabinet as shown in Figure 1-1.
As shown in Figure 1-2, the front LED display contains two status
lights for each disk module, and two disk enclosure status lights. The
enclosure status lights are visible with the front bezel installed.
Fault LED
(Amber)
Disk Activity
LED
Green
Figure 1-2 DAE2 Front LED Display
Fault LED
(Amber)
Figure 1-3 shows the DAE2 components visible from the rear of the
enclosure. Each highly-available DAE2 includes two link control
cards and two power supply/system cooling (power/cooling)
modules.
Power LED
(Green)
EMC2166
1-4
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
Enclosure
Address
Switch
Power/Cooling
Module B
Link Control
Card B (LCC B)
Power/Cooling
Module A
Link Control
Card A (LCC A)
Figure 1-3 Disk Enclosure Rear View
As shown in Figure 1-3 and Figure 1-4, an enclosure address (EA)
switch/indicator is located between the power supplies at the rear of
the disk enclosure. (The EA is sometimes referred to as an enclosure
ID.) Each link control card (LCC) includes a loop (bus) identification
indicator. The storage processor initializes loop ID when the
operating system loads.
About DAE2 Disk Enclosures
EMC2770
_
Enclosure
0
Address
+
0
1
2
3
Figure 1-4 Disk Enclosure Rear Displays
4
5
6
7
Loop ID
EMC2771
Introduction
1-5
About DAE2 Disk Enclosures
The enclosure address is set on the switch at installation. Disk module IDs are
numbered left to right (looking at the front of the unit) and are contiguous
throughout an array: enclosure 0 contains modules 0-14; enclosure 1 contains
modules 15-29; enclosure 2 includes 30-44, and so on through eight
enclosures.
The enclosure EA switch and loop indicator are described in the
installation procedure in Chapter 2. The status lights are described in
the Monitoring Disk Enclosure Status section of Chapter 3.
Midplane
Front Bezel
A midplane between the disk modules and the LCC and
power/cooling modules distributes power and signals to all
components in the enclosure. LCCs, power/cooling modules, and
disk drives — the enclosure’s field-replaceable units (FRUs) — plug
directly into the midplane.
The front bezel, shown in Figure 1-5, has a locking latch and an
electromagnetic interference (EMI) shield. You must remove the bezel
to remove and install drive modules. EMI compliance requires a
properly installed front bezel.
Figure 1-5 Disk Enclosure Front Bezel
1-6
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
EMC2173
Link Control Cards (LCCs)
(
)
(
)
An LCC supports and controls one Fibre Channel loop and monitors
the DAE2.
Fault
LED
(Amber)
Power
LED
(Green)
About DAE2 Disk Enclosures
Loop
ID LEDsLatch
Expansion
Connector
Figure 1-6 LCC Connectors and LEDs
Expansion
Link Active
LED
Green
The LCCs in a DAE2 are connected to other Fibre Channel devices
(processor enclosures, DAE2s, and so on) using twin-axial copper
cables. The cabling is not explicitly configured as a loop (with a long
return from the last disk enclosure to the server), but instead, as a set
of full-duplex, point-to-point connections with the last disk enclosure
in the chain closing the loop on its LCC.
The LCC independently receives and electrically terminates the
incoming FC-AL signal. The LCC passes the input signal to the disk
drives in the enclosure; it then sends the output signal, via cables, to
the next DAE2 in the loop. ATA link control cards provide the same
Fibre Channel input and output, but convert those signals to and
from the ATA protocol used by their disk drives.
Each LCC independently monitors the environmental status of the
entire enclosure, using a microcomputer-controlled FRU
(field-replaceable unit) monitor program. The monitor communicates
status to the server, which polls DAE2 status. LCC firmware also
controls the LCC port bypass circuits and the disk-module status
lights.
Primary
Link Active
LED
Green
Primary
Connector
EMC2165
LCCs do not communicate with or control each other.
Each LCC has four status lights. These status lights are described in
Monitoring Disk Enclosure Status in Chapter 3.
Link Control Cards (LCCs)
1-7
About DAE2 Disk Enclosures
Disk Modules
A latch on the LCC locks it into place to ensure proper connection to
the midplane. You can add or replace an LCC while the disk
enclosure is powered up.
Each disk module consists of one disk drive in a carrier. You can add
or remove a disk module while the DAE2 is powered up, but should
exercise special care when removing modules while they are in use.
Drive modules are extremely sensitive electronic components. Refer to the
instructions on Handling FRUs and Replacing or Adding a Disk Module in
Chapter 3 whenever you handle a disk module.
Fibre Channel disk modules will not work in an ATA enclosure, and
vice versa. You can visually distinguish between module types by
their different latch and handle mechanisms. ATA drive modules also
include a small printed-circuit adapter board in the back (connector
side) of the carrier. Figure 1-7 shows the DAE2 disk modules.
Fibre Channel Disk Module
Carrier
Latch
Handle
Figure 1-7 Disk Modules
Disk Drives
Drive Carrier
ATA Disk
Disk
Drive
EMC1758
Latch
Handle
Carrier
Adapter
Board
Disk Drive
EMC2654
DAE2 disk drives conform to either FC-AL or ATA 6 specifications,
and either 1-Gbit and 2-Gbit Fibre Channel or 1.5-Gbit ATA interface
standards. The disk module slots in the enclosure accommodate
1-inch (2.54 cm) by 3.5-inch (8.75 cm) disk drives.
The disk drive carriers are metal and plastic assemblies that provide
smooth, reliable contact with the enclosure slot guides and midplane
connectors. Each carrier has a handle with a latch and spring clips.
1-8
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
The latch holds the disk module in place to ensure proper connection
with the midplane. Disk drive Activity/Fault LEDs are integrated
into the carrier.
Power Supply/System Cooling Modules
The power supply/system cooling (power/cooling) modules are
located above the LCCs. The units integrate independent power
supply and dual-blower cooling assemblies into a single module.
Each power supply is an auto-ranging, power-factor-corrected,
multi-output, off-line converter with its own line cord and on/off
switch. Each supply supports a fully configured DAE2 and shares
load currents with the other supply. The drives and LCC have
individual soft-start switches that protect the disk drives and LCCs if
you install them while the disk enclosure is powered up. A FRU
(disk, LCC, or power/cooling module) with power-related faults will
not adversely affect the operation of any other FRU.
About DAE2 Disk Enclosures
The enclosure cooling system includes two dual-blower modules. If
one blower fails, the others will speed up to compensate. If two
blowers in a system (both in one power/cooling module, or one in
each module) fail, the DAE2 will go off line within two minutes.
Each power/cooling module has three visible status lights. The
rightmost LED indicates power to the supply; the LED adjacent to it
indicates a power supply fault. The leftmost LED indicates a failure
in one of the integrated blowers within that module that cool the disk
enclosure. The status lights are shown in Figure 1-8 and described in
Monitoring Disk Enclosure Status in Chapter 3.
Blower Fault
LED
(Amber)
Figure 1-8 Power/Cooling Module
Latch
Power Fault
LED (Amber)
ac
Connector
Power
LED
(Green)
EMC2714
A latch on the power/cooling module locks it into place to ensure
proper connection to the midplane. You can add or remove one
power/cooling module in a DAE2 while the system is powered up.
Power Supply/System Cooling Modules
1-9
About DAE2 Disk Enclosures
1-10
2-Gigabit Disk-Array Enclosure (DAE2) Hardware Reference
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