VERITAS Volume Manager 3.5 User's Guide - VERITAS Enterprise Administrator (June 2002)

Chapter 4, Volume Tasks 97
Adding a Mirror to a Volume
Adding a Mirror to a Volume
The volume Add Mirror procedurecreatesamirror(copy) ofavolume onadisk that is not
already being used by the volume. If one of the disks fails, the volume data can be
accessed from the surviving disks. A volume can have multiple mirrors.
◆ To create a mirror on an existing volume, use the Add Mirror Wizard.
◆ To create a new mirrored volume, use the Create Volume Wizard. You select a
mirrored layout when you create the volume. See “VxVM Volumes.”
Note The mirroring process is disabled if the volume cannot be mirrored or if there is no
unallocated space on another dynamic disk large enough to mirror the volume. A
RAID-5 volume cannot be mirrored.
▼ To add a mirror to an existing volume
1. Select the volume to be mirrored.
2. Choose Actions > Mirror > Add.
3. Complete the Add Mirror dialog box as follows:
Options:
- To add more than one mirror, enter the number of mirrors in
the Mirror Quantity field.
- To place the mirror on a specific disk, select Manually select
disks for use by this volume, and assign the
destination disks for the mirrors.
- To specify the layout for the mirror, select Mirror Across or
Stripe Across. For a striped mirror, specify the number of
columns and stripe unit size.