Compaq System/E25 User's Guide download pdf (Page 122)

122 Removal and Replacement

Disk System

Use this procedure if you need to move or remove and replace the disk system in

the rack. For example, you must remove the disk system from the rack in order to

replace the midplane or power switch assembly. Twenty four inches of vertical

space is required in the rack if the midplane or power switch assembly are to be

replaced without removing the disk system from the rack.

The disk system will be turned off in this procedure.

Caution Do not move the disk system with disks installed and power on.

Even a one-inch drop of the disk system can damage spinning

disks.

Tools

■ ESD wrist strap (no hand tools are required to perform this procedure).

Whenever possible, follow ESD procedures.

Procedure

1 Determine the file systems that will be inaccessible for I/O operations while

the disk system is turned off, and perform necessary system administration.

(See the HP-UX guide, How HP-UX Works: Concepts for the System

Administrator.)

2 Push and release the power button to turn off the disk system.

3 Remove the disk modules from the chassis and set them aside on an anti-

static surface. Label the disk modules so they can be reinstalled in the same

disk slots.

4 Remove the power supply/fan modules and set them aside on an anti-static

surface.

5 Remove screws from the mounting ears (see Figure 61).

6 Disconnect power and Fibre Channel cables from the back of the disk system.

WA RN IN G Product is heavy (~54 lbs. without disks). If you choose to remove

the disk system from the rack, use two people or a lift device.

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Compaq System/E25 User's Guide Page 122