Grass Valley PRS 250 RAID User Manual
Instruction Manual
Profile
®
RAID Storage
PRS 250
Printed in USA or United Kingdom
Tektronix, Inc.
PO Box 1000
Wilsonville, OR 97070-1000 USA
1-800-547-8949 (USA and Canada)
1-503-682-7300
http://www.tek.com
N 60
Copyright 1998 Tektronix, Inc. Wilsonville, Oregon.
Printed in the United States of America or the United Kingdom. All rights reserved. This document may not be copied in whole or in part, or
otherwise reproduced except as specificallypermittedunder U.S. copyright law, without the prior written consent of Tektronix, Inc., P.O. Box
1000, Wilsonville, Oregon 97070-1000 USA.
TEKTRONIX, TEK, and Profile are registered trademarks of Tektronix, Inc. Other trade names used in this document are trademarks or
registered trademarks of the manufacturers or vendors of the associated products.
Manual Revision Status
PRODUCT: PRS250 RAID Storage
REV DATE DESCRIPTION
May 1998 Original Issue. Manual part number 071-0226-00.
Tektronix Product Support
You can get technical assistance, check on the status of problems, or report new problems by
contacting our Product Support Group.
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i
ii
Table of Contents
General Safety Summary
Injury Precautions .................................................................................................................. v
Product Damage Precautions................................................................................................ vi
Safety Terms and Symbols.................................................................................................... vi
Regulatory Information
Certifications and Compliances.............................................................................................. vii
Chapter 1 Introduction
Organization of the Manual.................................................................................................... 1-1
About the RAID Storage Chassis........................................................................................... 1-2
RAID Storage Components.................................................................................................... 1-3
Storage-control Processor (SP) ........................................................................................ 1-4
Disk Drive Modules ........................................................................................................... 1-5
Voltage Semi-regulated Converters (VSCs)...................................................................... 1-6
Fan Module ....................................................................................................................... 1-7
Chapter 2 Installation
Installing RAID in a Cabinet................................................................................................... 2-1
Attaching the Slot Matrix Label.......................................................................................... 2-1
Mounting RAID in a Cabinet.............................................................................................. 2-1
Configuring the Profile Disk Drives ........................................................................................ 2-8
Removal of Profile Internal Disk Drives............................................................................. 2-8
Connection to the Profile System........................................................................................... 2-10
Connecting Serial (console) Cables.................................................................................. 2-10
Setting SP SCSI IDs.......................................................................................................... 2-11
Configurations and Cabling............................................................................................... 2-13
Two-Channel Profile/Single-SP RAID .......................................................................... 2-14
Two-Channel Profile/X Single-SP RAIDs..................................................................... 2-15
Two-Channel PDR200/One Dual-SP RAID ................................................................. 2-16
Four Channel Profile/2 RAIDs...................................................................................... 2-17
Four-Channel Profile/Multiple RAIDs............................................................................ 2-18
Four-Channel PDR200/One Dual-SP RAID................................................................. 2-20
Connecting the Power Cord.............................................................................................. 2-21
Powering Up the Storage Chassis .................................................................................... 2-22
Configuring and Managing the RAID ..................................................................................... 2-23
Running DASSMGR.......................................................................................................... 2-23
Before You Begin ......................................................................................................... 2-23
Starting DASSMGR...................................................................................................... 2-23
Setting Password Protection............................................................................................. 2-24
Changing the Password.................................................................................................... 2-25
Setting Storage System Date and Time............................................................................ 2-26
Chapter 3 Servicing the System
Checking Status with the Presentation Utility......................................................................... 3-1
Moving the Grid Cursor ................................................................................................ 3-4
Reconfiguring a Storage System ........................................................................................... 3-5
Changing Physical Disk Configurations ............................................................................ 3-5
Adding Disk Modules and Creating New Logical Units ................................................ 3-5
Binding Disk Modules as a Logical Unit ....................................................................... 3-6
Binding with Two SPs................................................................................................... 3-8
Unbinding a Physical Disk Unit..................................................................................... 3-9
RAID Instructions iii
Table of Contents
Changing Physical Disk Unit Parameters ......................................................................... 3-10
Changing the Rebuild Time.......................................................................................... 3-10
Updating Licensed Internal Code...................................................................................... 3-11
Installing a New Revision of Licensed Internal Code................................................... 3-12
Upgrade and Repair of a Storage System............................................................................. 3-14
Handling CRUs ................................................................................................................. 3-15
Avoiding Electrostatic Discharge (ESD) Damage ........................................................ 3-15
Emergency Procedures (without an ESD kit)............................................................... 3-16
Precautions When Removing, Installing, or Storing CRUs .......................................... 3-16
Opening and Closing the Fan Module............................................................................... 3-17
Replacing or Adding a Disk Module.................................................................................. 3-18
Removing a Disk Module ............................................................................................. 3-18
Installing a Disk Module ............................................................................................... 3-20
Removing or Installing a Disk Filler Module...................................................................... 3-22
Installing or Removing SP Memory Modules.................................................................... 3-23
Installing SP Memory Modules..................................................................................... 3-23
Removing SP Memory Modules................................................................................... 3-24
Replacing an SP ............................................................................................................... 3-25
Removing an SP .......................................................................................................... 3-25
Installing an SP ............................................................................................................ 3-27
Removing or Installing an SP Filler Board ........................................................................ 3-28
Replacing or Adding a VSC .............................................................................................. 3-30
Replacing a Fan Module................................................................................................... 3-32
Appendix A Technical Specifications
AC power requirements................................................................................................ A-1
Power cables................................................................................................................ A-1
Operating limits ............................................................................................................ A-1
Non-operating limits (shipping and storing).................................................................. A-1
Physical........................................................................................................................ A-2
Service clearance......................................................................................................... A-2
Cabling......................................................................................................................... A-2
Miscellaneous............................................................................................................... A-2
Appendix B Ordering Information
Customer Replaceable Units................................................................................................. B-1
Field Replaceable Units......................................................................................................... B-2
iv RAID Instructions
General Safety Summary
General Safety Summary
Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the
system. Read the General Safety summary in other system manuals for
warnings and cautions related to operating the system.
Injury Precautions
Use Proper Power
Cord
Ground the Product This product is grounded through the grounding conductor of the power
Do Not Operate
Without Covers
Use Proper Fuse To avoid fire hazard, use only the fuse type and rating specified for this
Do Not operate in
Wet/Damp
Conditions
Do Not Operate in an
Explosive
Atmosphere
Avoid Exposed
Circuitry
To avoid fire hazard, use only the power cord specified for this product.
cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or
output terminals of the product, ensure that the product is properly
grounded.
To avoid electric shock or fire hazard, do not operate this product with
covers or panels removed.
product.
To avoid electric shock, do not operate this product in wet or damp
conditions.
To avoid injury or fire hazard, do not operate this product in an explosive
atmosphere.
To avoid injury, remove jewelry such as rings, watches, and other
metallic objects. Do not touch exposed connections and components
when power is present.
RAID Instructions v
General Safety Summary
Product Damage Precautions
Use Proper Power
Source
Use Proper Voltage
Setting
Provide Proper
Ventilation
Do Not Operate With
Suspected Failures
Do not operate this product from a power source that applies more than
the voltage specified.
Before applying power, ensure that the line selector is in the proper
position for the power source being used.
To prevent product overheating, provide proper ventilation.
If you suspect there is damage to this product, have it inspected by
qualified service personnel.
Safety Terms and Symbols
Terms in This
Manual
!
!
!
!
These terms may appear in this manual:
WARNING:Warning statementsidentify conditionsor practices that can
result in personal injury or loss of life.
CAUTION: Caution statements identify conditions or practices that can
result in damage to the equipment or other property.
Terms on the
Product
Symbols on the
Product
!
!
These terms may appear on the product:
DANGER indicates a personal injury hazard immediately accessible as
one reads the marking.
WARNING indicates a personal injury hazard not immediately
accessible as you read the marking.
CAUTION indicates a hazard to property including the product.
The following symbols may appear on the product:
DANGER high voltage
Protective ground (earth) terminal
ATTENTION – refer to manual
vi RAID Instructions
Regulatory Information
Regulatory Information
Certifications and Compliances
Canadian Certified
Power Cords
Canadian Certified
AC Adapter
FCC Emission
Control
Canadian EMC
Notice of
Compliance
Canadianapproval includes the products and power cordsappropriate for
use in the North America power network. All other power cords supplied
are approved for the country of use.
Canadian approval includes the AC adapters appropriate for use in the
North America power network. All other AC adapters supplied are
approved for the country of use.
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with this
installation manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his or her own expense. Changes or
modifications not expressly approved by Tektronix can affect emission
complianceand could void the user’s authority tooperate this equipment.
This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.
EN55022 Class A
Warning
Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant les limites applicables aux appareils numériques de la classe A
préscrites dans le Règlement sur le brouillage radioélectrique édicté par le
ministère des Communications du Canada.
For products that comply with Class A. In a domestic environment, this
product may cause radio interference, in which case the user may be
required to take adequate measures.
RAID Instructions vii
Regulatory Information
viii RAID Instructions
Chapter
1
Introduction
This manual explains how to install the rack-mounted RAID Storage chassis, how to
configure and manage the system, and how to replace and/or add customer
replaceable units (CRUs). The manual is for technical personnel who want to install
and maintain the RAID Storage chassis. It assumes familiarity with Profile
Professional Disk Recorders. For information on RAID usage, see the Profile User
Guide.
NOTE: Using the PRS250 RAID Storage chassis requires Profile System Software
V2.2 or higher. For optimum performance from your PRS250, you should use
Profile System Software V2.4.
Organization of the Manual
The manual is organized into chapters which are identified and briefly described
below.
Chapter 1 - Introduction: Introduces the RAID Storage chassis and its components.
Chapter 2 - Installation: Describes how to install and configure the RAID Storage
chassis.
Chapter 3 - Servicing the System: Describes how to monitor and service the RAID
Storage chassis.
Appendix A: Lists the technical specifications of the RAID Storage chassis.
Appendix B: Provides ordering information for CRUs and Field Replaceable Units
for the RAID Storage chassis.
RAID Instructions 1-1
Chapter 1 Introduction
About the RAID Storage Chassis
This RAID Storage provides a compact, high-capacity, high-availability source of
disk storage for the Profile Professional Disk Recorder. A single RAID Storage
chassis offers a large capacity of high-availability disk storage in as many as 20 disk
modules that can individually be replaced while the system is powered up.
Two models are available, the PRS250 and the PRS250M. The PRS250M offers two
storage processors, which increase the bandwidth of the RAID chassis.
Approximate storage times
Video Compression Type 10 Disk Drives 15 Disk Drive 20 Disk Drives
M-JPEG 6 hours 9 hours 12 hours
MPEG 12 hours 18 hours 24 hours
a.
At 24 Mb/sec for MJPEG, 8 Mb/sec for MPEG, 4 audio tracks per video
a
The following table lists the maximum number of RAIDs that can be connected to a
Profile Professional Disk Recorder.
Maximum number of RAIDs per Profile system
Number Of Profile Channels Maximum Number of RAID Chassis
26
412
a.
Requires Profile System Software V2.4. To reach maximum
capacity, connect no more than 3 RAID chassis per SCSI bus,
with no other external SCSI devices connected.
a
1-2 RAID Instructions
RAID Storage Components
The RAID Storage chassis contains the components listed below.
• One (PRS250) or two (PRS250M) storage-control processors (SP).
• 10, 15, or 20 disk drive modules.
• One fan module.
• Three voltage semi-regulated converters (VSCs) power supplies
The SPs, disk modules, fan module, and VSCs in the RAID Storage chassis are
customer-replaceable units (CRUs), which you can install or replace yourself.
The following illustration shows the location of the RAID’s CRUs, which also
include the SCSI bus cable, SCSI terminator plug, power cord, and the optional
asynchronous cables. In addition to the CRUs, the RAID Storage chassis contains
field-replaceable units (FRUs). Only qualified service personnel should replace an
FRU.
Location of the customer-replaceable units in the storage chassis
RAID Storage Components
Front of RAID Storage chassis
A0
A1
B0
B1
C0
C1
D0
D1
E0
E1
A2
A3
B2
B3
C2
C3
D2
D3
10,15, or 20
Disk drive
modules
Power cord
E2
E3
Back of RAID Storage chassis
Fan module
(not shown)
SCSI bus cable
SP A SP B
VSC
VSC
SCSI terminator
plug
VSC
Serial cables
(optional)
RAID Instructions 1-3
Chapter 1 Introduction
Storage-control Processor (SP)
Memory modules
Service light
(amber)
Ready light
(green)
Latch
Bezel
Printed-circuit
board
TheSP consists ofa printed circuitboard with two or four memory modules (DIMMs)
and a bezel with status lights, and latches to secure the SP in place. The memory
modules provide 32 Mbytes of SP memory. The SP uses 4Mbytes of this memory for
system buffers. The remaining memory is available for system use.
Two status lights on the SP indicate the following:
Ready light (green) — Lights while the SP is powered on and operating normally.
Service light (amber) — Lights when the SP is not working properly.
The SPs are visible when you swing the fan module down from the back of the RAID
Storage chassis.
The SPprocesses data written to or read from the disk drive modules, and controls the
disk modules in the storage chassis through a synchronous SCSI bus. It has five
internal SCSI buses, each supporting four disk drive modules for a total of 20 disk
drive modules. The Disk Array Storage System Manager (dassmgr) uses an RS-232
connection to the RAID Storage chassis to communicate with an SP. Using the
dassmgr, you can set up RAID Storage memory, bind disk modules into logical units
(LUNs), update the RAID Storage Licensed Internal Code, and check RAID Storage
status.
A second SP increases the RAID chassis bandwidth for improved performance,
provided the two SPs are connected to separate SCSI busses. Do not connect both SPs
to the same SCSI bus.
IMPORTANT You should never attempt to replace any of the SP’s
components, except the memory modules.
1-4 RAID Instructions
Disk Drive Modules
Ready light
(green)
Busy light
(green)
Fault light
(amber)
A disk drive module, also called a disk module, consists of a disk drive, a power
regulator board, internal cabling, and a plastic carrier. The carrier has a handle and
guides for inserting and holding the module in the RAID Storage chassis. A label
attached to the carrier’s side shows the drive module’s model number and capacity.
Disk Drive Modules
Disk drive module’s model
number label
Three status lights on the module indicate the following:
Ready light (green) — Lights while the disk drive module is powered up and ready
for use.
Busy light (green) — Lights while the drive is in use; for example, during formatting
or user I/O operations.
Fault light (amber) — Lights when the module is shut down by the SP because the
module failed. Also lights after you replace the drive, while the replacement drive
spins up to speed.
You can remove or install any one module at a time within a group of five drives
either while the storage chassis is running or in the idle mode (not running). You
should never open a disk drive module or attempt to replace any of its internal
components.
RAID Instructions 1-5
Chapter 1 Introduction
Voltage Semi-regulated Converters (VSCs)
The VSCs are power supplies that convert the installation site’s ac line voltage to the
48, 24, and 18Vdc required to power the modules in the RAID Storage chassis. The
chassis contains three VSCs for high-availability operation.
Replace light
(amber)
Ready light
(green)
Two status lights on each VSC indicate the following:
Ready light (green) — Lights while VSC is operating normally.
Replace light (amber) — Lights when the SP determines that the VSC has failed.
The VSCs are visible when you swing the fan module down on the back of the RAID
Storage chassis.
You can remove or install a VSC while the storage chassis is running.
If a VSC fails, replace it as quickly as possible. With three VSCs, if one of them fails,
the RAID Storage continues to operate but you still should replace the failed VSC as
soon as possible to restore high-availability operation. Failure to replace the VSC
could cause the RAID Storagechassis to shut downif either the fan module or another
VSC fails. You should never open a VSC or attempt to replace any of its internal
components.
1-6 RAID Instructions
Fan Module
The RAID Storage chassis uses a single fan module, also called a fan pack, that
attaches to the back of the chassis. The fan module contains six high-capacity,
multiple speed fans, and a control/monitor board.
Fan Module
Replacelight
(amber)
Lock
One status light on the fan module indicates the following:
Replace light (amber) — Lights when a fan in the module is not working.
For high-availability operation, if a fan stops working, the remaining five fans speed
up to maintain air flow. The Replace light turns on to indicate that you must replace
the fan module as soon as possible.
The fan module is mounted on hinges so you can swing it down away from the
chassis. A mechanical lock and magnetic catches hold the fan module closed.
NOTE:If the fan moduleremains open formore than approximately 2minutes, the
storage chassis automatically shuts down to prevent overheating.
You can remove a fan module while the storage chassis is running. You should never
open the module or attempt to replace any of its internal components. If one of the
fans in the module fails, replace the fan module as quickly as possible to maintain
high-availability operation. Failure to replace the module could cause the RAID
Storage to shut down if either a VSC module or another fan fails.
RAID Instructions 1-7
Chapter 1 Introduction
1-8 RAID Instructions
Chapter
2
Installation
The procedures in this chapter assume the installation site meets the ac power
requirements and operating limits listed in Appendix A.
Installing RAID in a Cabinet
Attaching the Slot Matrix Label
Three sticky-backed labels are shipped with the storage chassis: a rack slot matrix
diagram showing the disk drive module locations, and two sheets of stickers for
identifying disk modules. Attach the rack slot matrix to your storage chassis so it is
visible. Save the two sheets of stickers for the person configuring the disk modules
into physical disks.
Mounting RAID in a Cabinet
You can mount RAID in a standard 19-inch cabinet using the hardware mounting kit,
which is supplied with the storage chassis.
WARNING: Since the RAID chassis weighs a minimum of about 46 kg (101 lbs),
installing it in the cabinet requires at least two people.
WARNING: Before opening the cabinet to install RAID, follow the cabinet
manufacturer’s recommendations for powering down the cabinet.
RAID Instructions 2-1
Chapter 2 Installation
To install RAID in a cabinet
1. If you want to lessen the weight of the chassis, remove disk modules from the chassis
CAUTION: If you remove disk modules from the RAID chassis, be sure to label
each module and return all the modules to their original locations. Failure to
correctly locate the disk modules will result in one or more inaccessible LUNs, and
may even make the entire storage chassis inaccessible.
(see Removing a Disk Module in Chapter 3), making sure that as you remove each
module, you write on the module’s label the ID number of the slot (A0, for example)
from which you removed the module. Black out the lower ten slot postions on the slot
matrix label, since these positions are not available on the PRS250.
For the slot ID numbers, refer to the slot matrix label, which you should have just
attached to the RAID chassis, or to the following illustration.
Disk module slot ID numbers
A0
A1
B0
B1
C0
C1
D0
D1
E0
E1
A2
A3
B2
B3
2. Remove the chassis front panel as shown below.
Removing the front panel
E2
C2
D2
E3
C3
D3
Pull panel from one
side then the other.
3. Remove any trim and/or open the doors of the cabinet in which you are installing
2-2 RAID Instructions
the chassis. For information on opening the cabinet, refer to the documentation for
the cabinet.
Mounting RAID in a Cabinet
4. Attach the mounting rails to the cabinet according to the following instructions,
using the rails and parts in the hardware mounting kit.
a. Make sure that you have 14-inch clearance in the cabinet in which you will
install the storage chassis.
b. Mark and label a baseline in a 1/2-inch space (measured between the center of
adjacent holes) on the front and middle cabinet channels, as shown in the
following illustration. (Do not position the baseline between two 5/8-inch
spaced holes.)
Chassis location in the cabinet
1/2
inch
space
Front cabinet channels
Middle cabinet channels
toptop
Top of chassis
24 holes
or
14 inches
Base line
(bottom of chassis)
IMPORTANT You must mark a baseline in a 1/2-inch space or the chassis
won’t fit in the space where you plan to install it. The spaces on a channel,
measured between the center of adjacent holes, are either 1/2 inch or 5/8 inch
wide.
c. From the baseline, count up 24 holes. Mark the top-of-chassis line above the top
hole on the front and middle cabinet channels, as shown in the illustration.
RAID Instructions 2-3
Chapter 2 Installation
2
d. .Loosen thesecuring nuts➊on the two mounting railsas shown in the following
illustration.
Attaching the rails
2
1
2
0226-7
1
Slide rails to correct
length and tighten nuts
2
e. .If the front channel does not have threaded screw holes, attach clip nuts to the
front channel.
f. Align the bottom of the rail is aligned with the baseline mark on the cabinet’s
channel. Attach the mounting rails to the rack mount cabinet as shown (➋).
2-4 RAID Instructions
Mounting RAID in a Cabinet
g. Slide the two clip nuts onto each front channel as shown below.
Attaching the clip nuts
Counting from the top of the rail, slide
clip nuts onto the 4th and 17th holes
of each front channel.
Rail
You are now ready to install the chassis in the cabinet
RAID Instructions 2-5
Chapter 2 Installation
CAUTION: Do not lift the RAID chassis by the handle on the fan module at the
back of the storage chassis or by the disk drive module handles.
5. Mount the storage chassis in the cabinet with the remaining parts in the hardware
A. Slide chassis onto rails and
into the cabinet.
B. Fasten front of chassis to
cabinet with four screws
(2perside).
mounting kit as shown in the following illustration.
Attaching the storage chassis to the cabinet
Rail
C. Fasten back of chassis to left
and right rails with two screws
(1 per rail).
6. Reinstall any disk modules that you removed, being sure to put each module back
into its original slot.
2-6 RAID Instructions
Mounting RAID in a Cabinet
7. Reinstall the storage chassis’s front panel as shown in the following illustration.
Installing the front panel
Ballstud
Press panel onto four ballstuds.
(one at each corner)
8. Reinstall any trim you removed from the cabinet, and close any cabinet doors you
opened.
RAID Instructions 2-7
Chapter 2 Installation
Configuring the Profile Disk Drives
The Profile disk recorder internal drives can not be used when a RAID unit is
connected. To disable the Profile system’s internal disk drives and enable the RAID
Storage, refer to your Profile User Manual.
Removal of Profile Internal Disk Drives
NOTE: Only qualified service personnel should perform the following procedure.
If you want to use a Profile disk recorder with attached RAID Storage, and are sure
you will not be using thatProfile without RAID Storage, you can remove the Profile
system’s internal disk drives for use elsewhere. Two procedures follow, one for the
PDR100 and one for the PDR200.
Removing PDR100 Internal Drives
To remove the internal disk drives from the PDR100, perform the following
procedure:
1. Turn all power to the Profile Off.
NOTE: You should NOT discard any hardware or cables.
2. Refer to your Profile Service Manual to remove the top cover from the Profile
chassis.
3. Refer to your Profile Service Manual to remove the SCSI cable(s). (If you have a
2-channelsystem there willbe a SCSI A cable only. If you have a 4-channel system
there will be both a SCSI A and a SCSI B cable.)
4. Refer to your Profile Service Manual to remove the Hard Disk Carrier Tray from
the Profile chassis.
5. Refer to your Profile Service Manual to remove the hard disk drives from the tray.
(There will be 4 hard disk drives if you have a 2-channel system and 8 hard disk
drives if you have a 4-channel system.)
6. Refer to your Profile Service Manual to reinstall the empty Hard Disk Carrier Tray
into the Profile chassis.
7. Use cable ties to anchor the loose hard disk drive cable(s) to the inner top edge of
the Hard Disk Carrier Tray.
8. Attach jack screws (2 each, P/N 214-4689-00) to the bus terminator (P/N
011-0170-00), both of which came with your RAID Storage chassis. Refer to ➊ in
the following illustration.
9. Attach the bus terminator(s) to the Disk Recorder board(s). (There will be one
board if you have a 2-channel system and two if you have a 4-channel system.)
Refer to ➋ in the following illustration
2-8 RAID Instructions
Removal of Profile Internal Disk Drives
Installing the internal disk recorder terminator
1
2
.
10.Reinstall the Profile covers.
Removing PDR200 Internal Disk Drives
To remove the internal disk drives from the PDR200 perform the following
procedure:
1. Turn all power to the Profile system off.
NOTE: You should NOT discard any hardware or cables.
2. Refer to your Profile Service Manual to remove the top covers from the Profile
chassis.
3. Refer to your Profile Service Manual to remove the hard disks from the system. At
the same time, remove the SCSI cable(s) connected between the disk recorder
board(s) and the SCSI Distribution board.
4. Reinstall the Profile chassis covers.
9674-20
RAID Instructions 2-9
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