Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

3
To backup the data in the snapshot, use an appropriate utility or operating
system command to copy the contents of the snapshot to tape, or to some
other backup medium.
4
You now have the following options:
■ Refresh the contents of the snapshot. This creates a new point-in-time
image of the original volume ready for another backup. If synchronization
was already in progress on the snapshot, this operation may result in large
portions of the snapshot having to be resynchronized.
See “Refreshing an instant snapshot” on page 385.
■ Reattach some or all of the plexes of the snapshot volume with the original
volume.
See “Reattaching an instant snapshot” on page 385.
■ Restore the contents of the original volume from the snapshot volume.
You can choose whether none, a subset, or all of the plexes of the snapshot
volume are returned to the original volume as a result of the operation.
See “Restoring a volume from an instant snapshot” on page 387.
■ Dissociate the snapshot volume entirely from the original volume. This
may be useful if you want to use the copy for other purposes such as testing
or report generation. If desired, you can delete the dissociated volume.
See “Dissociating an instant snapshot” on page 388.
■ If the snapshot is part of a snapshot hierarchy, you can also choose to
split this hierarchy from its parent volumes.
See “Splitting an instant snapshot hierarchy” on page 389.
Creating and managing third-mirror break-off snapshots
Break-off snapshots are suitable for write-intensive volumes, such as database
redo logs.
To turn one or more existing plexes in a volume into a break-off instant snapshot
volume, the volume must be a non-layered volume with a mirror or mirror-stripe
layout, or a RAID-5 volume that you have converted to a special layered volume
and then mirrored. The plexes in a volume with a stripe-mirror layout are
mirrored at the subvolume level, and cannot be broken off.
See “Using a DCO and DCO volume with a RAID-5 volume” on page 320.
The attributes for a snapshot are specified as a tuple to the vxsnap make command.
This command accepts multiple tuples. One tuple is required for each snapshot
that is being created. Each element of a tuple is separated from the next by a slash
character (/). Tuples are separated by white space.
375Administering volume snapshots
Creating instant snapshots