Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

VxVM will recover the volumes automatically after the join unless it is set

not to recover automatically. Check if the snapshot volumes are initially

disabled and not recovered following the join.

If a volume is in the DISABLED state, use the following command on the

primary host to recover and restart the snapshot volume:

# vxrecover -g volumedg -m snapvol

When the backup is complete, use the following command to unmount the

snapshot volume, and make it ready for its contents to be refreshed from the

primary volume:

# umount mount_point

When synchronization is complete, the snapshot is ready to be re-used for

backup.

Warning: Before attempting to unmount the snapshot, shut down all

applications that access a file system in the snapshot volume, and also

unmount any such file system.

Repeat steps 2 through 14 each time that you need to back up the volume.

In some instances, such as recovering the contents of a corrupted volume, it may

be useful to resynchronize a volume from its snapshot volume (which is used as

a hot standby):

# vxsnap -g diskgroup restore volume source=snapvol

destroy=yes|no

The destroy attribute specifies whether the plexes of the snapshot volume are

to be reattached to the original volume. For example, to resynchronize the volume

cfs_vol from its snapshot volume scfs_vol:

# vxsnap -g exampledg restore cfs_vol source=scfs_vol destroy=no

Note: You must unmount the file system that is configured on the original volume

before attempting to resynchronize its contents from a snapshot.

Off-host cluster file system backup

Using off-host processing to back up cluster file systems

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