Compaq System/E25 Guide de l'utilisateur télécharger pdf (Page 111)

Removal and Replacement 111

Removal and Replacement

Disk Module

Add or replace disks to increase storage capacity or eliminate faults. (See

chapter 4 for troubleshooting procedures.) Disks must be Fibre Channel (FC) and

3.5 inches wide but can vary in capacity. For current information about supported

disks, consult an HP sales representative.

You do not need to turn off the disk system to replace a disk or filler.

Preparation

Removing or replacing a disk has consequences for the file systems and logical

volumes located on the disk. Before removing or replacing a disk, complete the

appropriate system administration for your environment and configuration.

Instructions for determining physical volume status and reducing and recreating

mirrored extents follow. For additional information, refer to your HP-UX guide,

How HP-UX Works: Concepts for the System Administrator.

The LVM commands in the following instructions assume the following:

■ All of the extents of the disk in use belong to mirrored logical volumes

created with the strict (-s) option.

■ The replacement disk is of the same or greater capacity as the disk being

replaced.

The correct set of instructions depends on whether the mirrored volume is active

and attached, or unattached. First, follow the instructions to determine the

volume status; then follow the instructions to replace the volume depending on

whether the volume is attached or unattached.

To Determine If a Volume Group or Physical Volume Group Is

Active

At the host console, enter:

# vgdisplay <VG name>

For example:

#vgdisplay /dev/vg00

If the volume group is not active, the host will display:

# vgdisplay: volume group not activated.

# vgdisplay: cannot display volume group /dev/vg00

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Compaq System/E25 Guide de l'utilisateur Page 111