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

Adding a Mirror to a Volume
98 VERITAS Volume Manager User’s Guide - VEA
After you have provided all necessary information in the dialog box, click OK.
Adding a mirror requires resynchronization, so this task may take some time.
Notes:
- The Mirror Add task requires a volume name.
- Once mirrored, the data in the volume is redundant. If a disk fails, the data remains
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 mirrors.
- Only disks in the same disk group as the volume can be used to create the new mirror.
- If no disks are assigned, VxVM uses available disk space to create the mirror.
- A RAID-5 volume cannot be mirrored.
- If your system supports root volumes, then you can 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).
- If you create more than one mirror at a time, you may see inconsistent information on the
progress bar. Also, the generation of multiple mirrors does affect system resources. After
creating a mirror, you may want to wait until it has finished generating before creating
another mirror.