VERITAS Volume Manager 4.1 Administrator's Guide
Administering Volumes
Adding a RAID-5 Log
Chapter 8 285
Adding a RAID-5 Log
NOTE You may need an additional license to use this feature.
Only one RAID-5 plex can exist per RAID-5 volume. Any additional
plexes become RAID-5 log plexes, which are used to log information
about data and parity being written to the volume. When a RAID-5
volume is created using the vxassist command, a log plex is created for
that volume by default.
To add a RAID-5 log to an existing volume, use the following command:
# vxassist [-b] addlog volume [loglen=length]
NOTE If specified, the -b option makes adding the new log a background task.
NOTE You can specify the log length used when adding the first log to a volume.
Any logs that you add subsequently are configured with the same length
as the existing log.
For example, to create a log for the RAID-5 volume volraid, use the
following command:
# vxassist addlog volraid
Adding a RAID-5 Log using vxplex
As an alternative to using vxassist, you can add a RAID-5 log using the
vxplex command. For example, to attach a RAID-5 log plex, r5log, to a
RAID-5 volume, r5vol, use the following command:
# vxplex att r5vol r5log