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:
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.
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