VERITAS Volume Manager 3.1 Administrator's Guide

Volume Tasks
Adding a RAID-5 Log
Chapter 6260
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 addlog volume_name
To create a log for the RAID-5 volume volraid, use the following
command:
# vxassist addlog volraid