Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

vset1, with component volumes v1 and v2. This volume set has a mirror break-off
snapshot, svset1, with component volumes sv1 and sv2. The last two entries
show a detached plex, vol-03, and a detached mirror volume, mvol2, which have
vol as their parent volume. These snapshot objects may have become detached
due to an I/O error, or, in the case of the plex, by running the vxplex det
command.
The CHANGE_DATA column shows the approximate difference between the current
contents of the snapshot and its parent volume. This corresponds to the amount
of data that would have to be resynchronized to make the contents the same again.
The SYNCED_DATA column shows the approximate progress of synchronization
since the snapshot was taken.
The -l option can be used to obtain a longer form of the output listing instead of
the tabular form.
The -x option expands the output to include the component volumes of volume
sets.
See the vxsnap(1M) manual page for more information about using the vxsnap
print and vxsnap list commands.
Controlling instant snapshot synchronization
You can control the synchronization of instant snapshots.
Synchronization of the contents of a snapshot with its original volume is not
possible for space-optimized instant snapshots.
The commands in this section cannot be used to control the synchronization of
linked break-off snapshots.
By default, synchronization is enabled for the vxsnap refresh and restore
operation on instant snapshots. Otherwise, synchronization is disabled unless
you specify the sync=yes attribute to the vxsnap command.
Table 5-1 shows the commands that are provided for controlling the
synchronization manually.
Table 5-1
Commands for controlling the synchronization
DescriptionCommand
Pause synchronization of a volume.vxsnap [-gdiskgroup] syncpause vol
Resume synchronization of a volume.vxsnap [-g diskgroup] syncresume vol
Administering instant snapshots
Creating instant snapshots
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