Rackable Systems OmniStor 4700S Series User manual

Rackable Systems Inc.
Restricted Rights and Liability
No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic,
mechanical, recording, or otherwise, in whole or part, without prior written permission from Rackable Systems Inc.
Rackable Systems Inc. shall not be liable for any damages or for the loss of any information resulting from the performance or use of the
information contained herein. Your rights to the software are governed by the license agreement included with any accompanying
software. Information in this manual is subject to change without notice. Product features and specifications described are subject to
change without notice.
Copyright © 2005 Rackable Systems Inc. All Rights Reserved.
Rackable Systems Inc.
1933 Milmont Ave.
Milpitas, CA 95035
http://www.rackable.com
Rackable Systems, and OmniStor are trademarks of Rackable Systems Inc.
The names of actual companies and products mentioned herein may be the trademarks of their respective owners.
Agency Notes
WARNING: Drives and controller/adapter cards described in this manual should only be installed in UL-listed and CSA certified computers that give
specific instructions on the installation and removal of accessory cards (refer to your computer installation manual for proper
instructions).
ATTENTION: Les lecteurs et cartes contrôleurs décrits ici ne doivent être montés que sur des ordinateurs homologués (UL et CSA) et livrés avec des
manuels contenant les instructions d’installation et de retrait des accessoires. Reportez-vous au manuel d’installation de votre ordinateur.
SERVICE NOTE: Remove the power cables prior to servicing this equipment.
!

i
Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Customer Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
1Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
At a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Power System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Standard AC Hot Swappable Power Supplies . . . . . . . . . . . . . . . . . . . . . . 4
Optional DC Hot Swappable Power Supplies. . . . . . . . . . . . . . . . . . . . . . 5
Cooling Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
RAID Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Automatic Termination Override. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery Backup Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Embedded SAF-TE Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power-On LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Channel Status LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Supply Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fan Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2Operating Mode and Topologies . . . . . . . . . . . . . . . . . . . . 17
Simplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Direct Attach Connection - Single Host (Single HBA) . . . . . . . . . . . . . . . . 18
Direct Attach Connection - Single Host (Dual HBA) . . . . . . . . . . . . . . . . . 18
Clustered Connection - Dual Hosts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Expansion Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table of Contents
ii
LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Alternate Path Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
A Word about Clustering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Minimizing Downtime for Maximum Data Availability . . . . . . . . . . . . . . . 20
How Available are Clusters? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Application of Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Storage System Detailed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Installing the Enclosure into the Rack Cabinet . . . . . . . . . . . . . . . . . . . . . . 24
Installing the Enclosure into the Tower Stand . . . . . . . . . . . . . . . . . . . . . . . 27
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Cabling the DC Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Before You Continue... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Special Note for Microsoft Windows 2000/2003 Installations . . . . . . . . . . 34
Operating Mode Configuration and Cabling . . . . . . . . . . . . . . . . . . . . . . . . 35
Simplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Direct Attach Connection - Single Host (Single HBA) . . . . . . . . . . . . . . 35
Direct Attach Connection - Single Host (Dual HBAs) . . . . . . . . . . . . . . 36
Clustered Connection - Dual Hosts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Expansion Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Powering On the Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Powering Off the Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4Managing and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Enclosure Component Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power-On LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Channel Status LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power Supply Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Fan Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Drive Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Drive Activity LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Drive Carrier LitePipes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
LED Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
VT-100 Interface Enclosure Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Updating Controller Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table of Contents
iii
5Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
General Enclosure Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Logical Drive and OS Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Problems During Bootup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Common SCSI Bus Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Common Problems and Interpreting the LEDs . . . . . . . . . . . . . . . . . . . . . . 60
Terminal and COM Port Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Host SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Removing the Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Replacing the Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Replacing an AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Replacing a DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Replacing a Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Replacing a RAID Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Replacing the Backup Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Replacing the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
A Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
BPort Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
VHD/CI SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
RS-232 Service Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
SATA Communication RS-232 Cable Specifications . . . . . . . . . . . . . . . . . . 87
DC Power Supply Connector Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
CRegulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Compliance Information Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
FCC Class A Radio Frequency Interference Statement . . . . . . . . . . . . . . . . 90
Class A Taiwanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Class A Japanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
CE Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
AC Power Cord Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table of Contents
iv

v
Preface
About this Manual
Welcome
Congratulations on the purchase of your new OmniStor ® 4700S Series RAID Storage
System from Rackable Systems Inc. This OmniStor series is a low cost-high capacity,
fault-tolerant advanced serial technology architecture RAID storage system. It’s unique 2U
design is optimized to fit in the compact space of today’s data centers rack environments
and fit comfortably as a deskside tower system.
The storage enclosure supports up to twelve hot pluggable 1-inch high Serial Advanced
Technology Architecture
(SATA) disk drives in a 2U (3.47-inch) form factor. Component
redundancy is found in the hot pluggable cooling fan module which contains dual in-line fans
and will continue to provide adequate cooling should one fan fail. An N+1 power system is
available by adding the optional second independent power supply. Each power supply is a hot
swappable component that continues to operate without interruption to normal service with
the loss of one power supply.
Host connectivity is provided through dual independent 320 MB per second SCSI ports
(VHD/CI connectors). Likewise, scalable expansion is made available through dual
independent Ultra320 ports. RAID functionality is provided through the single onboard Rackable
designed SCSI-SATA RAID Controller.
The design of the storage system implements Serial ATA II technology which provides a
highly reliable system architecture that supports command queuing and hot swappable SATA
disk drives. Serial ATA brings efficient I/O performance and boosts storage capacity over
conventional RAID storage systems.

About this Manual
Welcome
vi
The OmniStor 4700S Series RAID Storage System is comprised of a 12-Bay 3.5" (2U)
rackmount storage solution. The base system includes a single power supply (optional
second power supply for N+1 power system), a single SCSI-SATA RAID Controller and a
removable cooling fan module. It also includes a VT-100 interface firmware-based
configuration and monitoring software, as well as the HTML-based StorView Storage
Management software, a cable, and a rackmount rail kit.þ
There are currently two models:
OmniStor 4711S: 512MB Cache Memory with a Backup Battery
OmniStor 4712S: 1GB Cache Memory with a Backup Battery
This user’s guide is your complete documentation to set up the storage system hardware,
add components, cable the storage system components, replace parts, and diagnose/repair
your system.
For information on software configuration and management, refer to the software guides
included with your system.

About this Manual
Typographical Conventions vii
Typographical Conventions
The following typographical conventions are used in the user’s guide:
nMenu items are displayed in the format: “Array Configuration menu, choose View
Unused Drives.”
nCode font will indicate literal text used in examples.
nItalic code font indicates a replaceable or variable item in code.
nItalic text indicates the item that is selected or chosen.
nKey strokes are enclosed in brackets, e.g., <Esc>, <K>, or <Enter>.
Features
The OmniStor 4700S Series RAID Storage Systems are designed for lower cost high
capacity or high performance applications.
The following are major features of the OmniStor 4700S Series Storage Systems:
nUltra320 SCSI-to-Serial ATA storage system enclosure.
nHot pluggable Serial ATA disk drives, 12 per enclosure.
nHot pluggable cooling fan module which includes dual in-line fans.
nA standard AC power supply with an option for a redundant second power supply.
nOptional DC power supply with an option for a redundant second power supply.
nSupports SAF-TE, an industry standard enclosure management and onboard
environmental monitoring.
nDesigned to fit standard 19-inch rack enclosures or a deskside tower.
nFront panel LEDs provide notifications of system component status, and logical
and physical drive status.
nSCSI-SATA RAID Controller employs an Intel XScale 600MHz RISC processor.
n512 MB or 1GB cache memory using 266MHz DDR SDRAM.
nDual 8-port Serial ATA 1.5 Gb disk controllers.
nDual Ultra320 MB/sec Ultra-LVD SCSI ports with four VHD/CI SCSI port
connectors. Two ports available for expansion.
nSupports 12 drives per array

About this Manual
Customer Care
viii
nSupports up to 12 arrays (12, 1-drive arrays using RAID level 0).
nSupport for up to 512 logical drives.
nSupports RAID levels 0, 1, 5, 10, and 50.
nOn-board controller-to-host SAN LUN Mapping.
nOperating system independence – no special software or drivers required.
nCapable of sustaining high sequential RAID 5 reads and high sequential RAID 5
write operations.
nOnline capacity expansion allowing reconfiguration without interruptions.
nVT-100 interface for configuration and monitoring.
nGraphical HTML-based interface via StorView Storage Management software
which provides a robust and easy-to-use configuration and monitoring tool.
nFlashable RAID Controller firmware, updates can be accomplished through VT-100
firmware interface or through StorView Storage Management software.
nHost clustering support for maximum data availability.
Customer Care
You will find warranty, customer service and technical support on the Rackable Systems
web site. Refer to http://www.rackable.com.

1
Chapter 1
Getting Started
This chapter provides a description of the enclosure components and its onboard
monitoring systems.
The Components section identifies and gives a complete description of each major
component. The Monitoring section describes the enclosure’s LEDs, and the manner in
which normal and abnormal conditions are presented.
OmniStor 4700S Series RAID Storage System
RESET ALARM
Tower Model
Rack-Mount Model

Chapter 1 - Getting Started
At a Glance
2
At a Glance
The following illustrations show the featured components of the OmniStor 4700S Series
RAID Storage System. Familiarize yourself with its components prior to installing and
using the storage system.
Component Views
Hot-pluggable power supply
(AC PSU is shown)
Dual in-line 80-CFM hot
swappable cooling fan module
Option for second power
supply (Blank plate shown)
SCSI-SATA RAID Controller
RS-
232
DTE
H
OST
CH
1
H
OST
CH
0
H
OST
CH
1
H
OST
CH
DRT
H1A
BK1A PWR
H0A
BK0A

Chapter 1 - Getting Started
Components 3
Components
This section provides a description of each of the major components that comprise the
OmniStor 4700S Series RAID Storage System.
Front Bezel
The front bezel houses the Status LEDs, Drive LEDs, and alarm reset button. When
removed, the user has access to the disk drives. The front bezel can be installed or removed
without interruption to system activities.
Embedded within the front bezel is the electronic package that provides the communication
with the monitoring system. The monitoring system manages the signals to the front panel
through a smart interface. Power is applied to the front bezel through the interface edge
connector, where a control circuit monitors the bezel for proper connection. When the
bezel is properly installed and power is applied to the enclosure, the bezel is immediately
energized.
Refer to “Control and Monitoring” on page 15 for details on the monitoring functions.
Removable Front Bezel
To remove the bezel and gain access to the disk drives, use a Phillips screwdriver to release
both bezel fasteners, then grasp and remove the bezel. The fasteners rotate one-quarter turn
clockwise to lock and counter-clockwise to unlock.

Chapter 1 - Getting Started
Power System
4
Power System
The single or dual power supply configuration is determined at boot up. If at boot up, only
one power supply is detected, then the single power supply configuration is set. If two
power supplies are detected, then the dual power supply configuration is set.
Standard AC Hot Swappable Power Supplies
The AC power system is designed to support two 350-watt hot-pluggable power supplies,
each with independent AC power cords and cooling fans. The base system has one power
supply with an option for a second power supply. This power system provides the enclosure
with “N+1” redundant power when both power supplies are installed. Each power supply
has auto-switching circuitry for use with either 100V or 240V AC systems.
AC Power Supply
Power is applied to the enclosure by pressing the power supply On/Off switch to the “On”
position. A Power On LED located on each power supply will be illuminated indicating
that AC power has been applied. The front bezels’ “Power On” LED will also be
illuminated indicating that power has been applied.
If the power supply cooling fan fails, the Fault LED will illuminate and the alarm will sound.
The power supply also has an amber general Fault LED. If you have a dual power supply
configuration and power is not applied to one of the power supplies, the general Fault LED
is illuminated.
P
ower On LED
(green)
Fault LED
(amber)
Release
Latch
Power Connector
Module

Chapter 1 - Getting Started
Optional DC Hot Swappable Power Supplies 5
When the dual power supply configuration is set at boot up, the front bezels’ Power Supply
Status LED will illuminate green when both power supplies are on and operating normally.
If only one power supply is operational, the Power Supply Status LED will be illuminated
amber.
Each power supply has an AC Power Cord Module. The module has a power cord bale
incorporated into the design to secure the power cord once it has been properly inserted.
The bale prevents inadvertent disconnects.
Optional DC Hot Swappable Power Supplies
NOTE: Information provided here regarding the site requirements and DC source should
be used as a guide. Refer to your DC Source documentation and local/state
government requirements.
The DC power system allows the storage system to be installed with Telco system hardware
type installations. It is designed to support two 350-watt hot-pluggable power supplies, each
with independent DC power cables and cooling fans. The base system has one power supply
with an option for a second power supply. This power system provides the enclosure with
“N+1” redundant power with Telco hardware when both power supplies are installed. Each
power supply cables directly with a DC power feed system.
DC Power Supply
Power is applied to the enclosure by pressing the power supply On/Off switch to the “On”
position. A Power On LED located on each power supply will be illuminated indicating
that DC power has been applied. The front bezels’ “Power On” LED will also be
illuminated indicating that power has been applied.
P
ower On LED
(green)
Fault LED
(amber)
Release
Latch
Power Connector

Chapter 1 - Getting Started
Optional DC Hot Swappable Power Supplies
6
If the power supply cooling fan fails, the Fault LED will illuminate and the alarm will sound.
The power supply also has an amber general Fault LED. If you have a dual power supply
configuration and power is not applied to one of the power supplies, the general Fault LED
is illuminated.
CAUTION: The DC system must be installed in a restricted access location, in
accordance with the intent of the National Electrical Code. A restricted
access location is defined as an area intended only for qualified or trained
personnel only. Access should be controlled by key lock or access card.
Each power supply has a special cable connector that plugs into the face of the power
supply and mechanically connects to a DC feed system. Refer to the Installation chapter for
cabling procedures.
DC Source Site Requirements
The power feed must be electrically isolated from any AC power source, provide a reliable
connection to earth (battery room positive bus is connected to the grounding electrode),
and capable of providing up to 600 watts of continuous power per feed pair.
Over-current Protection Requirements
Over-current protection devices must be provided as part of each equipment rack. Circuit
breakers must be located between the DC power feed source and the power supplies (two
20 amp double-pole fast trip DC-rated circuit breakers for each power supply).
NOTE: Over-current protection devices must meet applicable national and local electrical
safety codes and be approved for the intended application.
Electrical Equipment Requirement
Voltage -36 to -72 VDC
Max. Operating Current 13.5 amp to 6.3 amps
Max. Input Surge Current 20.25 amps

Chapter 1 - Getting Started
Cooling Fan Module 7
Power supply overload protection will shut down the power supply when the output power
rating exceeds 110% to 130% of maximum rated output current.
DC Supply and Ground
The DC supply and ground conductor must meet the following requirements:
nSuitable conductor material: copper only.
nPower supply connections through the input connectors; 12AWG:
-48V
-48V Return
Ground to the power supply
nSystem ground conductor: 8 AWG.
nCable insulation rating: minimum of 75° C, low smoke fume (LSF), flame retardant.
n Branch circuit cable insulation color: per applicable national electrical codes.
nCable type: UL style 1028, UL 1581(VW-1), IEEE 383 compliant, or IEEE
1202-1991 compliant.
nGrounding insulation color: green/yellow.
Cooling Fan Module
The cooling system consists of two high-performance (80-CFM) cooling fans mounted in a
single fan module which slides into a bay at the rear of the enclosure. The design of the fan
module provides for an easy-to-install user-
replaceable component in a live environment without interruption of service.
If any one fan should fail, cooling redundancy and efficiency are degraded. The cooling fans
and enclosure temperature are constantly monitored for fault conditions. In the event of a
fault condition the front panel Fan Status LED will change from a green state to a solid
amber state in the case of a fan failure, or to a blinking amber green state in the case of an
over-temperature condition. In both cases an audible alarm sounds. These notifications are
provided to monitoring software, such as StorView.
WARNING: Do not operate the enclosure for extended periods of time (greater than 5
minutes) with the cooling fan module removed.

Chapter 1 - Getting Started
Cooling Fan Module
8
Cooling Fan Module
The enclosure has temperature sensors in three different areas, the drive bay, the RAID
Controller, and the power supplies. There are several steps the storage system performs to
prevent component damage due to over temperature conditions.
If the drive bay area reaches a temperature of 50°C (122°F) an audible alarm will sound, the
front panel Fan Status LED will flash alternately amber then green, and the monitoring
software will post a warning message. These events are interpreted by SAF-TE and report in
the form of notifications which give the user a warning that a condition is causing the
enclosure temperature to exceed the preset maximum allowable value, and an action is
required by the user to determine the cause and take corrective measures. It may be due to a
blockage of air flow or a low fan speed.
If the RAID Controller reaches a temperature of 65°C (149°F) an audible alarm will sound,
the front panel Fan Status LED will flash alternately amber and green, and the monitoring
software will post a warning message. If the temperature on any RAID Controller continues
to rise and reaches 71°C (159°F) the controller will flush its cache and shutdown. The
controller will also spin down the disk drives at this temperature.
If a power supply reaches 85°C (185°F), it will shut down.
Fan Speed Override Contr
ol
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)