nStor NexStor 4000S Series User manual

USER'S GUIDE
NexStor® 4000S & 4100S Series
STORAGE SYSTEMS
4000S.book Page 1 Friday, November 14, 2003 3:10 PM

4000S.book Page 2 Friday, November 14, 2003 3:10 PM

USER'S GUIDE
NexStor® 4000S & 4100S Series
STORAGE SYSTEMS
4000S.book Page 1 Friday, November 14, 2003 3:10 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 © 2003 nStor Corporation, Inc. All Rights Reserved.
nStor, AdminiStor, 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.
!
4000S.book Page 2 Friday, November 14, 2003 3:10 PM

i
Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
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
SAF-TE Disk I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SCSI SAF-TE Cluster Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Spin-Up Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Host SCSI I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Single Bus Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
RAID Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
RS-232 Service Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Control and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power-On LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Channel Status LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Supply Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Fan Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2 Theory of Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Operating Modes Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Stand-Alone Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Active-Active Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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Table of Contents
ii
Active-Passive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Understanding Mirrored Operations . . . . . . . . . . . . . . . . . . . . . 31
A Word about Clustering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Minimizing Downtime for Maximum Data Availability . . . . . . . . 32
How Available are Clusters? . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Application of Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3 Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Storage System Detailed Installation . . . . . . . . . . . . . . . . . . . . . . 36
Installing the Storage System Enclosure into the Rack Cabinet . . 36
Installing the Storage System into the Tower Stand . . . . . . . . . . 39
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Cabling the DC Power Supplies . . . . . . . . . . . . . . . . . . . . . . . 43
Before You Continue... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Special Note for Microsoft Windows 2000/2003 Installations . . . . 45
Operating Mode Configuration and Cabling . . . . . . . . . . . . . . . . 46
JBOD - 12 Drive Configuration . . . . . . . . . . . . . . . . . . . . . . . . 46
JBOD - 24 Drive Configuration . . . . . . . . . . . . . . . . . . . . . . . . 51
RAID - 12 Drive Configuration . . . . . . . . . . . . . . . . . . . . . . . . 54
RAID - 24 Drive Configuration . . . . . . . . . . . . . . . . . . . . . . . . 56
RAID - 36 Drive Configuration . . . . . . . . . . . . . . . . . . . . . . . . 59
Topology Host Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Stand-Alone Single Port:Host Cabling . . . . . . . . . . . . . . . . . . . 64
Stand-Alone Dual Port:Host Cabling . . . . . . . . . . . . . . . . . . . . 66
Active-Active Single Port:Host Cabling. . . . . . . . . . . . . . . . . . . 69
Active-Passive Dual Port:Host Cabling . . . . . . . . . . . . . . . . . . . 74
Single Bus Clustering Configuration . . . . . . . . . . . . . . . . . . . . 76
Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Powering On the Storage System . . . . . . . . . . . . . . . . . . . . . . . . 80
Powering Off the Storage System . . . . . . . . . . . . . . . . . . . . . . . . 80
4 Accessing the RAID Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Accessing the Disk Array Administrator Software/VT-100 . . . . . . 82
Menu System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Updating RAID Controller Firmware . . . . . . . . . . . . . . . . . . . . . 86
5 Monitoring Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Enclosure Component Monitoring . . . . . . . . . . . . . . . . . . . . . . . 89
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Power-On LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
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Table of Contents
iii
Channel Status LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Power Supply Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Fan Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Drive Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Drive Activity LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
LED Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
One-Touch Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Enclosure SAF-TE Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Uploading SAF-TE Disk I/O & SCSI SAF-TE Cluster Card Firmware 101
Enclosure Fan Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
SAFTE Commands Debug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
General Enclosure Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Common SCSI Bus Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Terminal Emulator and COM Port Problems . . . . . . . . . . . . . . . . 112
Host SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Device SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . 113
Problems During Bootup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Controller Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Common Problems and Interpreting the LEDs . . . . . . . . . . . . . . 115
Warning and Error Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Disk Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Disk Channel Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Removing the Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Replacing the Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Replacing an AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . 127
Replacing a DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Replacing a Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Replacing the SAF-TE Disk I/O or SCSI SAF-TE Clustering Card . . 133
Replacing the Host SCSI I/O Card . . . . . . . . . . . . . . . . . . . . . . . 135
Replacing a RAID Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Replacing a “Killed” Controller When in Active-Active/Active-
Passive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Replacing the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
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Table of Contents
iv
A Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
B Port Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
VHD/CI SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
SAF-TE Service Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
RAID Controller Service Ports . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Null-Modem Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
DC Power Supply Connector Pinout . . . . . . . . . . . . . . . . . . . . . 152
C Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Compliance Information Statement . . . . . . . . . . . . . . . . . . . . . . 153
FCC Class A Radio Frequency Interference Statement . . . . . . . . . 154
Class A Taiwanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Class A Japanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
CE Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Power Cord Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
4000S.book Page iv Friday, November 14, 2003 3:10 PM

v
Preface
About this Manual
Welcome
Congratulations on the purchase of your new NexStor 4000S/4100S Series JBOD
and RAID Storage System from nStor Corporation. The NexStor 4000S/4100S
Series is a very high-performance fully fault-tolerant Ultra320/160 SCSI storage
system. It’s unique 2U design is optimized to fit in the compact space of today’s
data center rack enclosures and as a deskside tower system.
At its core is the NexStor 4000S Ultra320/160 SCSI JBOD storage enclosure which
supports up to twelve hot pluggable 1-inch high Ultra320 or Ultra160 disk drives all
in a 2U (3.47-inch) form factor enclosure. Full component redundancy is provided
through hot pluggable cooling fan module and independent power supplies. RAID
functionality is provided through an embedded Ultra160-to-Ultra160 SCSI RAID
Controller. The NexStor 4100S is available in two model configurations, either as a
single controller configuration designed for Stand-Alone topologies, or dual
controllers configuration for Active-Active or Active-Passive topologies.
Product Identification
Storage Enclosure Number of Controllers Model of Controller
NexStor 4000S
0 JBOD
NexStor 4110S
1 NexStor-Chaparral JSS122
NexStor 4120S
2 NexStor-Chaparral JSS122
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About this Manual
Features
vi
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 the software control, management and configuration, refer to
one of the following: VT-100 Software Guide or the AdminiStor Software Guide.
Features
The NexStor 4000S/4100S Series Storage Systems are designed for mission critical
applications requiring the highest performance with uncompromised data
reliability, such as mid-range and enterprise server storage. They maintain
exceptionally high throughput and are ideally suited for high bandwidth data
intensive applications, such as electronic commerce, digital video, CAD, seismic
research, digital pre-press, and 3-D imaging.
The following are major features of the NexStor 4000S/4100S Series Storage
Systems:
■
Ultra320/160 storage system enclosure.
■ Ultra160-to-Ultra160 SCSI RAID Controller.
■
Supports up to 12 drives in JBOD mode and 36 drives in RAID
configurations.
■
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.
■ 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.
■
Sequential data transfers from disk arrays at over 320 MB per second
sustained in JBOD mode and 160 MB per second with the RAID Controller
option installed.
■ Greater than 18,000 IOPs capability from a single controller.
■
Active-Active failover with dual hot-pluggable controllers.
4000S.book Page vi Friday, November 14, 2003 3:10 PM

About this Manual
Features vii
■
Operating system independent – no special software or drivers required.
■ Ultra320/160 low-voltage differential single (LVDS) host ports.
■
Up to three 320/160 MB/sec SCSI disk channels (third disk device channel
is normally a host channel but under some configurations can be used as a
disk channel).
■
Support for up to 36 disk drives organized in up to 24 arrays and a total of
64 logical unit numbers (LUNs).
■
Supports clustering environments.
■
All SCSI channels are backward compatible Ultra2 LVD and
Ultra/Fast/Asynchronous single-ended SCSI modes.
■ All SCSI channels support SPI-3 Cyclic Redundancy Check (CRC) and
Domain Validation.
■
Support for cache memory options from 64 MB up to 512 MB using
standard PC-133 compatible SDRAM. DIMMs must be qualified by nStor.
■ Support for RAID levels 0, 1, 3, 4, 5, 10, 50, and just a bunch of disks
(JBOD).
■
Online capacity expansion allowing reconfiguration without interruptions.
■
Drive Roaming for no loss of RAID and LUN configurations.
■ Advanced disk utilities, array verification and recovery, and spare pooling.
■
VT-100 interface for configuration and monitoring.
■
Graphical HTML-based interface AdminiStor Storage Management software
which provides a robust and easy-to-use configuration and monitoring
tool.
■ Firmware can be upgraded either in-band over the SCSI bus or out-of-band
via the RS-232 service port.
■
Continuous runtime diagnostics for warnings and automatic shutdown for
out-of-spec temperature and voltages, battery failures, and internal errors.
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About this Manual
Features
viii
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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 the normal and abnormal conditions are presented.
NexStor 4000S/4100S Series Storage System
RESETALARM
RESETALARM
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 4000S/
4100S Series Storage System. Familiarize yourself with its components prior to
installing and using the storage system.
Enclosure Component Identification
CTRL2
CTRL1
JP7
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
JP6
JP5
CNFG1
CNFG2
RAID
SPARE1
SPARE2
BAUDSEL
DL
YSTRT
RMTSTRT
JP8
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
CHANNEL -1
CHANNEL -2
JP1
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
JP3
JP2 JP4
Channel 3
JP1
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
JP3
JP2 JP4
350-watt hot pluggable
independent power
supplies (AC shown)
Dual in-line
80-CFM hot
swappable
cooling fans
SAF-TE Disk I/O Card or
SCSI SAF-TE Cluster Card
Host SCSI I/O Cards
SAF-TE Service &
Controller Service Ports
Controller 2
Controller 1
Controller
Cover Plate
Optional Dual
SCSI-to-SCSI
RAID Controllers
Channel 1
CH 3
Channel 0
CH 0
Channel 2
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 descriptive overview of each of the major components
that comprise the NexStor 4000S/4100S Series 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 SAF-TE processors (SEP). The SAF-TE processors control
the signals to the front panel through a smart interconnect. Refer to “Control and
Monitoring” on page 17 for details on the monitoring functions.
Power is applied to the front bezel through a smart interconnect edge connector,
where a control circuit monitors the bezel for a proper connection. When the bezel
is properly installed and power is applied to the enclosure, the bezel is
immediately energized.
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.
Reset Alarm
Drive LEDs
Alarm Reset Button
Status LEDs
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Chapter 1 - Getting Started
Power System
4
Power System
Standard AC Hot Swappable Power Supplies
The AC power system consists of two 350-watt hot-pluggable power supplies, each
with independent AC power cords and cooling fans. This power system provides
the enclosure with “N+1” redundant power. Each power supply has auto-switching
circuitry for use with either 100V or 240V AC systems.
Power Supply
Power is applied to the enclosure by pressing each of the two power supply
On/Off switches to their “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.
Each power supply also incorporates an amber general Fault LED. If the power
supply is installed and power is not applied to the power supply or the power
supply cooling fan fails, the Fault LED will illuminate, along with an audible alarm.
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.
Fault LED
Power On LED
Blank Plate
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Chapter 1 - Getting Started
Optional DC Hot Swappable Power Supplies
5
Optional DC Hot Swappable Power Supplies
The DC power system is designed to allow the storage system to be installed with
Telco system hardware isntallations. It consists of two 350-watt hot-pluggable
power supplies, each with independent DC power cables and cooling fans. It
provides the enclosure with “N+1” redundant power with Telco hardware. Each
power supply cables directly with your DC power feed system.
DC Power Supply
The DC power supply has the same user features to that of the AC Hot
Swappable Power Supplies described on the previous page.
NOTE: The DC system must be installed in a restricted access location, in
accordance with 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 your DC feed system. Refer to the
Installation chapter for cabling procedures.
DC Source Site Requirements
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
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
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.
Overcurrent Protection Requirements
Overcurrent 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 rip DC-rated circuit breakers for
each power supply).
NOTE: Overcurrent protection devices must meet applicable national and local
electrical safety codes and be approved for the intended application.
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
You DC supply and ground conductor must meet the following requirements:
■
Suitable condustor 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.
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Chapter 1 - Getting Started
Cooling Fan Module
7
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 by the SAF-TE
processor 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. The SAF-TE processor will also
provide notification data 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.
Cooling Fan Module
The enclosure has temperature sensors in three different areas, the drive bay, the
imageRAID Controllers, and the power supplies. There are several processes the
storage system takes 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 toggle amber green, and the monitoring
software will post a warning message. These notifications give the user a warning
Jumpers JP1 and JP2
Fan Speed Override Control
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Chapter 1 - Getting Started
Cooling Fan Module
8
that some condition is causing the enclosure temperature to exceed the preset
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 any controller reaches a temperature of 50°C (122°F) an audible alarm will
sound, the front panel Fan Status LED will alternate amber and green, and the
monitoring software will post a warning message. If the temperature on any
controller continues to rise, the controller will flush its cache and shutdown. If it is
the only controller (Simplex mode) or the only remaining controller (surviving
controller from a failed over operation) then the controller will also spin down the
disk drives at this temperature.
If any power supply reaches 85°C (185°F) the power supply will shut down.
The SAF-TE Disk I/O card has a firmware-based VT-100 interface which provides
an option to manage fan speed. This option provides a whisper mode fan
operation for noise sensitive environments. When enabled (default), and based on
a set of conditions, the software will manage the cooling fans RPM speed to
maintain the enclosure temperature while minimizing noise levels. Refer to
“Enclosure Fan Speed Control” on page 97 for more details on using this option.
A manual override of the fan speed control is available for special circumstance
environments. Referring to the illustration on the preceding page, two jumpers are
provided on the fan module printed circuit board to override the software control
of the fan speeds. This hardware setting routes full power voltage to the fans for
maximum operational speed, which is greater than the maximum speed set by the
automatic software control. This configuration is normally used when fan speed
noises are not an issue, and the ambient operating temperature is at or above 30°C
(86°F), thus ensuring that maximum available cooling is being provided.
The jumpers JP1 and JP2 by default are offset, which enables the automatic fan
speed control. The jumper JP1 controls Fan 0 and JP2 controls Fan 1. Placing the
jumper on both pins for each jumper will override the automatic setting and
configure the fans to maximum power.
4000S.book Page 8 Friday, November 14, 2003 3:10 PM