VERITAS Volume Manager 3.1 Administrator's Guide

Volume Tasks
Adding a DRL Log
Chapter 6262
Adding a DRL Log
To put Dirty Region Logging into effect for a volume, a log subdisk must
be added to that volume and the volume must be mirrored. Only one log
subdisk can exist per plex.
To add a DRL log to an existing volume, use the following command:
# vxassist addlog volume_name
For example, to create a log for the volume vol03, use the following
command:
# vxassist addlog vol03
When the vxassist command is used to add a log subdisk to a volume, a
log plex is also created to contain the log subdisk by default.
Once created, the plex containing a log subdisk can be treated as a
regular plex. Data subdisks can be added to the log plex. The log plex
and log subdisk can be removed using the same procedures used to
remove ordinary plexes and subdisks.