nStor NexStor 4700F Series User manual

USER'S GUIDE
NexStor®4700F Series
RAID STORAGE SYSTEMS
4700F.book Page 1 Wednesday, April 6, 2005 11:05 AM

4700F.book Page 2 Wednesday, April 6, 2005 11:05 AM

USER'S GUIDE
NexStor®4700F Series
RAID STORAGE SYSTEMS
4700F.book Page 3 Wednesday, April 6, 2005 11:05 AM

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
SFF Transceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Battery Backup Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Embedded SES Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Control and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Status Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drive LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 Topology and Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Simplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Direct Attach Connection - Single Host (Single HBA) . . . . . . . . . 18
Direct Attach Connection - Single Host (Dual HBA) . . . . . . . . . . 18
Clustered Connection - Dual Hosts (Single HBA) . . . . . . . . . . . . 19
SAN Connection - Multiple Hosts (Switch) . . . . . . . . . . . . . . . . . 19
LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Alternate Path Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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ii
A Word about Clustering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Minimizing Downtime for Maximum Data Availability . . . . . . . . 21
How Available are Clusters? . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Application of Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Storage System Detailed Installation . . . . . . . . . . . . . . . . . . . . . . 26
Installing the Enclosure into the Rack Cabinet . . . . . . . . . . . . . . 26
Installing the Enclosure into the Tower Stand . . . . . . . . . . . . . . 29
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Cabling the DC Power Supplies . . . . . . . . . . . . . . . . . . . . . . . 34
Before You Continue... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Special Note for Microsoft Windows 2000/2003 Installations . . . . 36
Operating Mode Configuration and Cabling . . . . . . . . . . . . . . . . 37
Simplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Direct Attach Connection - Single Host (Single HBA) . . . . . . . . 37
Direct Attach Connection - Single Host (Dual HBAs) . . . . . . . . 38
Clustered Connection - Dual Hosts (Single HBA) . . . . . . . . . . . 39
SAN Connection - Multiple Hosts (Switch). . . . . . . . . . . . . . . . 40
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
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Table of Contents
iii
Problems During Bootup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Common Fibre Loop/Bus Problems . . . . . . . . . . . . . . . . . . . . . . 58
Common Problems and Interpreting the LEDs . . . . . . . . . . . . . . 59
Terminal and COM Port Problems . . . . . . . . . . . . . . . . . . . . . . . 60
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Removing the Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Replacing the Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Replacing an AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . 65
Replacing a DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Replacing a Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Replacing a RAID Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Replacing the Backup Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Replacing the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
A Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
B Port Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
RS-232 Service Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Null-Modem Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . 82
DC Power Supply Connector Pinout . . . . . . . . . . . . . . . . . . . . . 83
C Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Compliance Information Statement . . . . . . . . . . . . . . . . . . . . . . . 85
FCC Class A Radio Frequency Interference Statement . . . . . . . . . 86
Class A Taiwanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Class A Japanese Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
CE Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
AC Power Cord Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
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iv
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v
Preface
About this Manual
Welcome
Congratulations on the purchase of your new NexStor
®
4700F Series RAID
Storage System from nStor Corporation. This NexStor series is a low cost-high
capacity, fault-tolerant advanced data protection serial technology RAID storage
system .
It’s unique 2U design is optimized to fit in the compact space of today’s data
center rack environments or as a deskside tower system.
The enclosure design supports up to twelve hot pluggable 1-inch high Serial
Advanced Technology Architecture (SATA) disk drives in a 2U (3.5-inch) form
factor. Component redundancy is provided through a hot pluggable cooling fan
module and a redundant N+1 power system with dual hot pluggable independent
power supplies reducing single points of failure. Use of hot swappable
components allows the storage system to maintain continuous operation without
interruption to normal service with the loss or replacement of a component.
The single FC-SATA RAID Controller provides a low-cost RAID solution
supporting RAID levels 0, 1, 5, 10 and 50, up to 1GB of battery-backed cache,
and dual 2Gb FC ports.
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About this Manual
Welcome
vi
The base system includes a single power supply with an optional second power
supply for an N+1 power system. It also includes an easy-to-use graphical
web-based storage management software suite (StorView) and a menu-driven
intuitive terminal type interface, power cord, null-model cable, and a rackmount
rail kit.
Available in two models:
NexStor 4711F : 512MB Cache Memory with a Backup Battery
NexStor 4712F : 1GB Cache Memory with a Backup Battery
This user’s guide is your complete documentation for an understanding of the
components and technology used in the topologies, and how to set up the
storage system hardware, cable the storage system, add components, replace
parts, and diagnose/repair your system.
Refer to the software guide included with your system. The documentation is
provided on a CD-ROM 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 4700F Series Storage Systems are designed for lower cost high capacity
or high performance applications.
The following are major features of the NexStor 4700F Series RAID Storage
Systems:
■
2Gb/sec Fibre Channel-to-Serial ATA storage system.
■
Hot pluggable Serial ATA disk drives, 12 per enclosure.
■
Hot pluggable cooling fan module with dual in-line fans.
■
A standard AC power supply system with an option for a redundant second
power supply.
■ Optional DC power supply system with an option for a redundant second
power supply.
■
Supports SES (SCSI Enclosure Services), an industry standard enclosure
management and onboard environmental monitoring interface.
■
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.
■ Supports up to 12 drives per array.
■ Supports up to 12 arrays (12, 1-drive arrays using RAID level 0).
■ RAID Controller uses an Intel XScale 600MHz RISC processor.
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About this Manual
Customer Care
viii
■ On-board controller-to-host port LUN mapping.
■ Operating system independence – no special software or drivers required.
■ Dual independent 2Gb/sec Fibre Channel ports with two FC optical port
connectors.
■
Dual 8-port Serial ATA 1.5 Gb disk controllers.
■
Capable of sustaining high sequential RAID 5 reads and high sequential
RAID 5 write operations.
■
512 MB or 1GB cache memory using standard DDR SDRAM.
■
Support for up to 512 Logical Drives.
■
Supports RAID levels 0, 1, 5, 10, and 50.
■
Online capacity expansion allowing reconfiguration without interruptions.
■ Firmware-based menu-driven intuitive terminal type interface for
configuration and monitoring.
■
Graphical HTML-based interface (StorView Storage Management Suite) for
configuration and monitoring tool.
■
Flashable controller firmware.
■
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 At-a-Glance section provides a pictorial view of the enclosure front and rear
components, the Components section gives a detailed description of each major
component, and the Monitoring section describes the enclosure’s LEDs.
NexStor 4700F 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 illustrations below show the featured components of the NexStor 4700F
Series RAID Storage System. We recommend that you familiarize yourself with the
components prior to installing and using the storage system.
Component Views
Hot-pluggable power supply
(AC PSU shown)
FC-SATA RAID Controller
Dual in-line 80-CFM hot
swappable cooling fan module
Option for second power
supply (Blank plate shown)
RS-232DTE
H0
H1
BK0A
PTNRFAIL
OVRCUR
DRT
PWR
BK1A
HOAHOL
H1AH1L
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 4700F 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 SES processes. The SES (SCSI Enclosure Services)
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 14 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 power supply system of the NexStor 4700F is a redundant design. When the
optional second power supply is added to the system, it will provide the N+1
fault tolerant 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. 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.
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
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.
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.
Each power supply will cable directly with a DC power feed system.
DC Power Supply
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
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.
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).
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
NOTE: Over-current 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
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 by SAF-TE 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. SES will also provide notification data to monitoring
software, such as StorView.
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Chapter 1 - Getting Started
Cooling Fan Module
8
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
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 the monitoring system and report in the form of notifications giving the user a
warning that a condition is causing the enclosure temperature to exceed the preset
maximum allowable value. 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 the
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.
Fan Speed Override Control
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)
4700F.book Page 8 Wednesday, April 6, 2005 11:05 AM