VERITAS Volume Manager 3.1 Administrator's Guide

Volume Tasks

Mirroring a Volume

Chapter 6 249

# vxplex att

volume_name plex_name

Mirroring All Volumes

To mirror all existing volumes on the system to available disk space, use

the following command:

# /etc/vx/bin/vxmirror -g

diskgroup

-a

To conﬁgure the Volume Manager to create mirrored volumes by default,

use the following command:

# /etc/vx/bin/vxmirror -d yes

If you make this change, you can still make unmirrored volumes by

specifying nmirror=1 as an attribute to the vxassist command. For

example, to create an unmirrored 20-megabyte volumenamed nomirror,

use the following command:

# vxassist make nomirror 20m nmirror=1

Mirroring Volumes on a VM Disk

Mirroring the volumes on a VM disk gives you one or more copies of your

volumes in another disk location. By creating mirror copies of your

volumes, you protect your system against loss of data in case of a disk

failure. This task only mirrors concatenated volumes. Volumes that are

already mirrored or that contain subdisks that reside on multiple disks

are ignored.

To mirror volumes on a disk, make sure that the target disk has an equal

or greater amount of space as the originating disk and then do the

following:

Step 1. Select menu item 5 (Mirror volumes on a disk) from the

vxdiskadm main menu.

Step 2. At the following prompt, enter the disk name of the disk that you wish to

mirror:

Mirror volumes on a disk

Menu: VolumeManager/Disk/Mirror

This operation can be used to mirror volumes on a disk.

These