Dell PowerVault 200S Manuale utente

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Throughout this guide, blocks of text may be accompanied by an icon and printed in

bold type or in italic type. These blocks are notes, cautions, and warnings, and they

are used as follows:

NOTE: A NOTE indicates important information that helps you make better use of

your computer system.

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Some warnings may appear in alternate formats and may be unaccompanied by an

icon. In such cases, the specific presentation of the warning is mandated by regula-

tory authority.

____________________

Information in this document is subject to change without notice.

Reproduction inany manner whatsoever without thewritten permission of Dell Computer Corpo-

ration is strictly forbidden.

Trademarksusedinthis text:

Dell

,the

DELL

logo,and

PowerVault

aretrademarksofDell Computer

Corporation. Other trademarks and trade names may be used in this documentto referto either

theentities claimingthemarks and namesortheir products. DellComputer Corporationdisclaims

any proprietary interest in trademarks and trade names otherthan its own.

December 1998 P/N 7920P

Dell PowerVault 20xS Storage System Lock Bar Replacement 1

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This document explains how to replace the lock bar in your Dell PowerVault 20

S stor-

age system.

Before you perform any of the procedures in this section, read the following warning

for your personal safety and to prevent damage to the storage system from electro-

static discharge (ESD).

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Before you start to work on the storage system, perform the following steps in

the sequence listed:

1. Turn off the storage system.

2. Disconnect the storage system from its power source(s).

3. Disconnect any communications cables.

4. Wear a wrist grounding strap, and clip it to an unpainted metal surface,

such as a part of the chassis.

If a wrist grounding strap is not available, touch the fan guard or some

other unpainted metal surface on the back of the chassis to discharge any

static charge from your body.

See the

Dell PowerVault 20xS Storage System Installation and Service Guide

for

cabling and power information.

2 Dell PowerVault 20xS Storage System Lock Bar Replacement

Perform the following steps to replace the lock bar in your Dell PowerVault 20

S stor-

age system:

1. Turn off the system and remove all power and signal cables.

2. If the storage system is installed in a rack, it must be removed from the rack.

Likewise, the storage system must be removed from its enclosure if it is used in

a stand-alone configuration. See the

Dell PowerVault 20xS Storage System Instal-

lation and Service Guide

for rack and stand-alone information.

NOTE: The storage system weighs about 32 kilograms (70 pounds) when fully

loaded. Be careful when sliding the storage system out of the rack or enclosure.

The support rails do not hold the last 5 centimeters (2 inches) of the storage sys-

tem, so make sure that the back of the storage systems does not fall.

3. Using the key, unlock the keylock.

4. With your fingertips, tap up on the lock bar (see Figure 1).

The lock bar swings away and down below the level of the drive bays.

5. If the storage system is in a stand-alone configuration, tapthe bar to the left. The

lock bar springs out. Swing the lock bar to the right of the drive bays.

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6. Remove the hard-disk drives.

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Release the hard-disk drive carrier by pressing down on the hard-disk drive carrier

lock (see Figure 2) and swing the carrier handle down (see Figure 3).

Slowly

pull

the carrier toward you until it slides free of the drive bay.

lock bar keylock

thumbscrews (4)

Dell PowerVault 20xS Storage System Lock Bar Replacement 3

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4 Dell PowerVault 20xS Storage System Lock Bar Replacement

7. While facing the storage system, use a 9/64-inch Allen (hex) wrench to remove

the screw on the right side of the lock bar tube (see Figure 4).

With the Allen wrench, push into the tube to engage the screw head (the lock bar

is spring-loaded on the opposite end).

NOTE: If the entire lock bar tube rotates while you are trying to remove the

screw, wrap some fabric or paper over the lock bar. Then grasp the wrapped sec-

tion of the lock bar with a pair of pliers to hold the tube and prevent it from

rotating while you remove the screw.

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8. Use the Allen wrench to remove the screw on the left end of the lock bar tube

(see Figure 5).

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9. Remove the internal lock bar and spring.

10. Remove the four screws on the left lock arm bracket and the four screws on the

right lock arm bracket and remove them from the storage system.

lock bar tube

screw

spring

internal lock bar

lock bar tube

Dell PowerVault 20xS Storage System Lock Bar Replacement 5

11. Attach the new left and right lock arm brackets to the storage system.

12. Replace the lock bar with the new lock bar.

13. Clean off the old Loctite on the left screw, and then place a new drop of Loctite

halfway between the thread of the screw and the tip.

14. Use the Allen wrench and the screw with Loctite to attach the lock bar tube to

the left lock arm.

15. Insert the spring and internal lock bar into the lock bar tube.

Make sure that the spring is on the left end of the tube.

16. Clean off the old Loctite on the right screw, and then place a new drop of Loctite

halfway between the thread of the screw and the tip.

17. Use the Allen wrench and the screw with Loctite to attach the right side of the

lock bar tube to the right lock arm.

With the Allen wrench, push into the tube to engage the screw head.

NOTE: If the entire lock bar tube rotates while you are trying to tighten the screw,

wrap some fabric or paper over the lock bar. Then grasp the wrapped section of

the lock bar with a pair of pliers to hold the tube and prevent it from rotating.

18. Reinstall all hard-disk drives in the same drive bays from which they were

removed.

19. Swing the lock bar up to the lock position.

The lock bar slips down into a detent. This holds the lock bar in the lock position.

If the storage system is in a stand-alone configuration, swing the lock bar to the

left into the lock position. The lock bar slips to the right into a detent. This holds

the lock bar in the lock position.

20. Place the key in the keylock and turn it to the locked position. Remove the key

from the keylock.

21. Reinstall the storage system into the rack or enclosure.

22. Reconnect all power and signal cables.

6 Dell PowerVault 20xS Storage System Lock Bar Replacement

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