VERITAS Volume Manager 3.1 Storage Administrator Administrator's Guide

Volume Tasks
Disabling a Mirror
Chapter 4182
Disabling a Mirror
NOTE Disabling a mirror can result in loss of data redundancy.
This procedure disables a mirror by temporarily detaching the mirror
from its volume. A detached mirror is inaccessible for reads and writes,
but is still associated with its volume. Once disabled, the mirror remains
detached from its volume until you either reattach the mirror (see
“Repairing a Mirror”) or restart the volume.
To disable a mirror in a volume
Step 1. Select the volume that contains the mirror to be disabled.
Step 2. Choose Volumes > Mirror > Disable (Selected menu) or Mirror Disable
(Command Launcher).
Step 3. Complete the Disable Mirror dialog box as follows:
When you have provided all necessary information in the dialog box,
click OK.
Select a mirror to disable: Select the mirror to be disabled.
Notes:
• When a mirror is disabled, volume reads and writes cannot be directed
to the mirror.
• If a volume only has two mirrors and one mirror is disabled, the
volume is not redundant while the mirror is disabled.
• The last mirror in a volume cannot be disabled.
• When a volume is restarted, any disabled (detached) mirrors should
be reattached to the volume automatically.