nStor 4100FS User manual

USER'S GUIDE
NexStor® 4100FS
STORAGE SYSTEMS
4100FS.book Page 1 Tuesday, July 8, 2003 4:35 PM

4100FS.book Page 2 Tuesday, July 8, 2003 4:35 PM

USER'S GUIDE
NexStor® 4100FS
STORAGE SYSTEMS
4100FS.book Page 3 Tuesday, July 8, 2003 4:35 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, NexStor, the NexStor 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
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
1 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
At a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cooling Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAF-TE Disk I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Host SCSI I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fibre Channel Host I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RAID Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
RS-232 Service Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2 Theory of Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operating Modes Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Stand-Alone Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Active-Active Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Active-Passive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Understanding Mirrored Operations . . . . . . . . . . . . . . . . . . . . . . 29
A Word about Clustering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Minimizing Downtime for Maximum Data Availability . . . . . . . . . 30
How Available are Clusters? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Application of Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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Table of Contents
ii
3 Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Storage System Detailed Installation . . . . . . . . . . . . . . . . . . . . . . 34
Installing the Storage System Enclosure into the Rack Cabinet . . 34
Installing the Storage System into the Tower Stand . . . . . . . . . . 37
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Enclosure Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Topology Host Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Powering On the Storage System . . . . . . . . . . . . . . . . . . . . . . . . 70
Powering Off the Storage System . . . . . . . . . . . . . . . . . . . . . . . . 70
4 SAN Solution Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Active-Active:Dual Port Mode for SAN . . . . . . . . . . . . . . . . . . . . 71
Active-Active:Single Port Mode for SAN . . . . . . . . . . . . . . . . . . . 76
SAN Configuration Not Supported . . . . . . . . . . . . . . . . . . . . . . . 80
True LUN Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5 Accessing the RAID Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Accessing the Disk Array Administrator Software/VT-100 . . . . . . 82
Menu System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Updating RAID Controller Firmware . . . . . . . . . . . . . . . . . . . . . 86
6 Monitoring Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Enclosure Component Monitoring . . . . . . . . . . . . . . . . . . . . . . . 89
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Drive Carrier LitePipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
One-Touch Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Enclosure SAF-TE Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Enclosure Fan Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
SAFTE Commands Debug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Uploading SAF-TE Controller Card Firmware . . . . . . . . . . . . . . . 103
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
General Enclosure Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Common SCSI Bus Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Terminal Emulator and COM Port Problems . . . . . . . . . . . . . . . . 109
Host SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
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Table of Contents
iii
Device SCSI Channel Problems . . . . . . . . . . . . . . . . . . . . . . . . . 110
Problems During Bootup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Controller Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Common Problems and Interpreting the LEDs . . . . . . . . . . . . . . 112
Warning and Error Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Disk Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Disk Channel Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Removing the Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Replacing the Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Replacing a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Replacing a Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Replacing the SAF-TE Disk I/O and Host SCSI I/O Card . . . . . . . 127
Replacing the Host I/O Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Replacing a RAID Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Replacing a “Killed” Controller When in Active-Active/
Active-Passive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Replacing the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
A Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
B Port and Transceiver Information . . . . . . . . . . . . . . . . . . . . . . . . . . 141
VHD/CI SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
SAF-TE Service Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
RAID Controller Service Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Null-Modem Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Optical SFP Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
C Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Compliance Information Statement . . . . . . . . . . . . . . . . . . . . . . . 147
FCC Class A Radio Frequency Interference Statement . . . . . . . . . 148
Class A Taiwanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Class A Japanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
CE Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Power Cord Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
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Table of Contents
iv
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v
Preface
About this Manual
Welcome
Congratulations on the purchase of your new NexStor 4100FS Series RAID
Storage System from nStor Corporation. The NexStor 4100FS Series is a very
high-performance fully fault-tolerant Fibre Channel-to-Ultra160 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 Ultra160 SCSI 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 hot pluggable embedded Fibre Channel-to-Ultra160 SCSI RAID
Controllers. The NexStor 4100FS is available in two model configurations, a single
controller configuration designed for Stand-Alone topologies, or a 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 4110FS
1 NexStor-Chaparral JFS224
NexStor 4120FS
2 NexStor-Chaparral JFS224
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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 4100FS 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 4100FS Series Storage Systems:
■
2 Gb Fibre Channel-to-Ultra160 RAID storage system enclosure.
■ Hot pluggable Fibre Channel-to-Ultra160 RAID Controllers.
■
Supports up to 48 drives in RAID configurations.
■
Designed to fit standard 19-inch rack enclosures and a deskside tower.
■ Sequential data transfers from disk arrays at over 160 MB/sec.
■
Greater than 18,000 IOPs capability from a single controller.
■
Active-Active failover with dual hot-pluggable RAID controllers.
■ Operating system independent – no special software or drivers required.
■
Four 2 Gb Fibre Channel host ports.
■
Up to four Ultra160 MB per second SCSI disk channels.
■ Support for up to 48 disk drives organized in up to 24 arrays and a total of
64 logical unit numbers (LUNs).
■ 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, and 50.
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About this Manual
Features vii
■ 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.
■ 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 4100FS 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 4100FS
Series Storage System. Familiarize yourself with its components prior to installing
and using the storage system.
Component Views
P-1
Tx Rx
P-2
Tx Rx
P-1
SAF-TE
CTRL1 CTRL2
TxRx
P-2
Tx Rx
JP1
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
JP3
JP2JP4
JP1
ADD JUMPER
TO DISABLE
TERMINATION
ADD JUMPER
TO SUPPLY
TERM POWER
JP3
JP2JP4
350-watt hot-pluggable
independent power supplies
Dual in-line 80-CFM hot
swappable cooling fans
SAFTE Disk I/O Card
Host SCSI I/O Card
Host I/O Card
SAF-TE Service & Controller
Service Ports
Controller 2
Controller 1
Controller
Cover Plate
Optional Dual
FC-to-Ultra160 SCSI
RAID Controllers
Channel 1
Channel 3
CH3
Channel 0
CH0
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 4100FS Storage System enclosure.
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. 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.
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.
Reset Alarm
Drive LEDs
Alarm Reset Button
Status LEDs
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Chapter 1 - Getting Started
AC Power
4
AC Power
The power system consists of two 350-watt hot-pluggable power supplies, each
with independent AC power cords and cooling fans providing 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
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Chapter 1 - Getting Started
Cooling Fan Module
5
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 SES
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 SES 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 NexStor 4100FS Storage System monitors temperature in three different areas,
the drive bay, the RAID Controllers, and the power supplies. There are several
steps the storage system performs to prevent component damage due to over
temperature conditions.
Fan Speed Override Control
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)
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Chapter 1 - Getting Started
Cooling Fan Module
6
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
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 RAID Controller reaches a temperature of 65°C (149°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 RAID
Controller continues to rise and reaches 71°C (159°F) the controller will flush its
cache and shutdown. If it is the only RAID 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 100 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.
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Chapter 1 - Getting Started
SAF-TE Disk I/O Card
7
SAF-TE Disk I/O Card
WARNING: The SAF-TE Disk I/O card is NOT HOT SWAPPABLE. You must
POWER DOWN the enclosure prior to removing or installing this card.
The SAF-TE Disk I/O card provides the built-in environmental and system status
monitoring, as well as, host connectivity to the disk drives, It also houses the
switches for setting SCSI IDs, VT-100 communication protocols, and drive spin up
options.
This card has two SAF-TE processors (SEPs) that continuously monitors the
enclosure for temperature status, fan status, power supply status, and SCSI
channel status. The SEPs are responsible for reporting environmentals and system
status to the front bezel LEDs/audible alarms and external monitoring software.
The monitoring system is fully compliant with SAF-TE specification protocol
version 1.0.
SAF-TE Disk I/O Card
At power up, the SAF-TE processors read the SCSI switch settings and configures
the system for the appropriate addresses. It then executes instructions from
firmware performing a self-test diagnostics. The firmware is flash upgradeable
using the SAF-TE RS-232 Service port located below the I/O card slots at the rear
of the enclosure. The firmware also contains the necessary functions for
enclosure management via a VT-100 interface.
NOTE: Specific switch settings are discussed later in the Installation chapter.
JP7
ADD JUMPER
TO DISABLE
TERMINATION
JP8
CNFG1
CNFG2
RAID
SPARE1
SPARE2
BAUDSEL
DLY STRT
RMTSTRT
ADD JUMPER
TO DISABLE
TERMINATION
CHANNEL -1
CHANNEL -2
R
D
A
0
123 4 5678
A
1
S
0
S
1
B
D
D
L
R
M
UP (Off -1)
Channel 2
Termination Jumper
Channel 1
Termination Jumper
Channel 1 Channel 2
DOWN (On -0)
Configuration1
Configuration2
RAID
Spare 1
Spare 2
BAUD RateSelect
Delay Drive Start
RemoteDrive Start
4100FS.book Page 7 Tuesday, July 8, 2003 4:35 PM

Chapter 1 - Getting Started
SAF-TE Disk I/O Card
8
The SAF-TE Disk I/O card has two 68-pin VHD/CI SCSI connectors which
provides the daisy-chain drive connectivity to the expansion JBOD enclosures.
The connectors are labeled “Channel 1” and “Channel 2.”
NOTE: Termination is automatic and provided internally on the drive mid-plane
circuit board. It is configured using two sets of jumpers on the card.
Changes are not required for the RAID enclosure’s SAF-TE Disk I/O card jumpers.
These jumpers enable and disable the automatic termination. Add the jumper
(installed on both pins) to disable the automatic termination. JP8 for Channel 1
and JP7 for Channel 2. (The default position is the jumper is offset or
unjumpered, that is automatic termination is enabled.)
In daisy-chain configurations, you will be required to make changes to the
jumper settings in the enclosure’s SAF-TE Disk I/O card in that appears at the end
of the daisy-chain. In each supported configuration, a NexStor 4000S (JBOD)
enclosure will be the enclosure at the end of the daisy chain. In some
configurations multiple JBOD enclosures can appear at the end of the chain.
Those enclosures will need to have their jumper settings, JP7 and JP8, set to the
jumpered position. During installation setup, instructions are provided to
correctly configure the daisy-chain enclosure settings.
4100FS.book Page 8 Tuesday, July 8, 2003 4:35 PM