VERITAS Volume Manager 3.1 Storage Administrator Administrator's Guide

Volume Tasks
Adding a Mirror to a Volume
Chapter 4170
take some time.
Notes:
• This task requires a volume name.
• Once mirrored, the data in the volume is redundant. If a disk fails,
the data will remain available on the surviving mirror (on another
disk).
• The new mirror cannot be created on a disk that already contains a
copy of the volume. Each mirror must reside on a separate disk.
• Sufficient disk space must be available to accommodate the
additional mirror(s).
• Only disks in the same disk group as the volume can be used to create
the new mirror.
• If no disks are assigned, the Volume Manager uses available disk
space to create the mirror.
• A RAID-5 volume cannot be mirrored.
• To mirror the root volume (and other volumes required to boot the
system) onto an alternate boot disk, use the Mirror Disk task.
• A volume can contain up to 32 plexes (mirrors).