nStor NexStor 4700S Series User manual

USER'S GUIDE
NexStor®4700S Series
RAID STORAGE SYSTEM
4700S.book Page 1 Wednesday, April 6, 2005 2:14 PM

4700S.book Page 2 Wednesday, April 6, 2005 2:14 PM

USER'S GUIDE
NexStor®4700S Series
RAID STORAGE SYSTEM
4700S.book Page 3 Wednesday, April 6, 2005 2:14 PM

nStor Corporation, 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
nStor Corporation, Inc.
nStor Corporation, 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. nStor Corporation reserves the right to periodically revise
this manual without notice. Product features and specifications described are subject to change without notice.
For Regulatory information, see Appendix C.
Copyright
nStor
Corporation
, Inc.
6190 Corte Del Cedro Road
Carlsbad, CA 92009
Copyright © 2005 nStor Corporation, Inc. All Rights Reserved.
nStor, StorView, NexStor, the NexStor logo, the StorView logo and the nStor logo are trademarks or registered
trademarks of nStor Corporation, Inc.
Other company and product names herein may be trademarks or registered trademarks of their respective
companies.
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.
!
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i
Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Customer Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
1 Getting 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
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2 Operating 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
LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Alternate Path Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
A Word about Clustering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Minimizing Downtime for Maximum Data Availability . . . . . . . . . 20
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ii
How Available are Clusters? . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Application of Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 Setup 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
4 Managing 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
5 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
General Enclosure Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Logical Drive and OS Problems . . . . . . . . . . . . . . . . . . . . . . . . . 56
Problems During Bootup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Common SCSI Bus Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
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Table of Contents
iii
Common Problems and Interpreting the LEDs . . . . . . . . . . . . . . 59
Terminal and COM Port Problems . . . . . . . . . . . . . . . . . . . . . . . 60
Host SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
B Port Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
VHD/CI SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
RS-232 Service Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Communication Cable Specifications . . . . . . . . . . . . . . . . . . . . . 87
DC Power Supply Connector Pinout . . . . . . . . . . . . . . . . . . . . . 88
C Regulatory 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
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iv
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v
Preface
About this Manual
Welcome
Congratulations on the purchase of your new NexStor ® 4700S Series RAID
Storage System from nStor Corporation. This NexStor 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 nStor 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.
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About this Manual
Welcome
vi
The NexStor 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.
There are currently two models:
NexStor 4711S : 512MB Cache Memory with a Backup Battery
NexStor 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.
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About this Manual
Typographical Conventions vii
Typographical Conventions
The following typographical conventions are used in the user’s guide:
■
Menu items are displayed in the format: “Array Configuration menu,
choose View Unused Drives.”
■ Code font will indicate literal text used in examples.
■ Italic code font indicates a replaceable or variable item in code.
■ Italic text indicates the item that is selected or chosen.
■ Key strokes are enclosed in brackets, e.g., <Esc>, <K>, or <Enter>.
Features
The NexStor 4700S Series RAID Storage Systems are designed for lower cost high
capacity or high performance applications.
The following are major features of the NexStor 4700S Series Storage Systems:
■
Ultra320 SCSI-to-Serial ATA storage system enclosure.
■
Hot pluggable Serial ATA disk drives, 12 per enclosure.
■
Hot pluggable cooling fan module which includes dual in-line fans.
■
A standard AC power supply with an option for a redundant second power
supply.
■
Optional DC power supply with an option for a redundant second power
supply.
■ Supports SAF-TE, an industry standard enclosure management and
onboard environmental monitoring.
■
Designed to fit standard 19-inch rack enclosures or a deskside tower.
■
Front panel LEDs provide notifications of system component status, and
logical and physical drive status.
■
SCSI-SATA RAID Controller employs an Intel XScale 600MHz RISC
processor.
■ 512 MB or 1GB cache memory using 266MHz DDR SDRAM.
■ Dual 8-port Serial ATA 1.5 Gb disk controllers.
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About this Manual
Customer Care
viii
■ Dual Ultra320 MB/sec Ultra-LVD SCSI ports with four VHD/CI SCSI port
connectors. Two ports available for expansion.
■
Supports 12 drives per array
■
Supports up to 12 arrays (12, 1-drive arrays using RAID level 0).
■ Support for up to 512 logical drives.
■ Supports RAID levels 0, 1, 5, 10, and 50.
■
On-board controller-to-host SAN LUN Mapping.
■
Operating system independence – no special software or drivers required.
■
Capable of sustaining high sequential RAID 5 reads and high sequential
RAID 5 write operations.
■
Online capacity expansion allowing reconfiguration without interruptions.
■ VT-100 interface for configuration and monitoring.
■ Graphical HTML-based interface via StorView Storage Management
software which provides a robust and easy-to-use configuration and
monitoring tool.
■
Flashable RAID Controller firmware, updates can be accomplished through
VT-100 firmware interface or through StorView Storage Management
software.
■
Host clustering support for maximum data availability.
Customer Care
You will find warranty, customer service and technical support on the nStor web
site. Refer to http://www.nstor.com.
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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.
NexStor 4700S Series RAID Storage System
RESETALARM
RESET ALARM
Tower Model
Rack-Mount Model
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Chapter 1 - Getting Started
At a Glance
2
At a Glance
The following illustrations show the featured components of the NexStor 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
RESETALARM
Drive Status LEDs
(left column of LEDs)
Power On LED
Channel Status LED
Power Supply Status LED
Fan Status LED
Alarm Reset Button
Drive Activity LEDs
(right column of LEDs)
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Chapter 1 - Getting Started
Components
3
Components
This section provides a description of each of the major components that
comprise the NexStor 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.
RESETALARM
Drive LEDs
Alarm Reset Button
Status LEDs
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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.
Power On LED
(green)
Fault LED
(amber)
Release
Latch
Power Connector
Module
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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.
Power On LED
(green)
Fault LED
(amber)
Release
Latch
Power Connector
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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
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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:
■
Suitable conductor material: copper only.
■
Power supply connections through the input connectors; 12AWG:
-48V
-48V Return
Ground to the power supply
■ System ground conductor: 8 AWG.
■
Cable insulation rating: minimum of 75° C, low smoke fume (LSF), flame
retardant.
■Branch circuit cable insulation color: per applicable national electrical codes.
■Cable type: UL style 1028, UL 1581(VW-1), IEEE 383 compliant, or IEEE
1202-1991 compliant.
■Grounding 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.
4700S.book Page 7 Wednesday, April 6, 2005 2:14 PM

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 Control
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)
4700S.book Page 8 Wednesday, April 6, 2005 2:14 PM