Reverting a volume to a selected Snapshot copy

How to revert a volume

To revert a volume, complete the following steps.

Note
To cancel volume reversion, press Ctrl-C at any time before you press y in
Step 8.

Step	Action
1	Notify network users that you are going to revert a volume so they know that the current data in the volume will be replaced by that of the selected Snapshot copy. Note NFS users should unmount the files and directories in the volume before the reversion. If they do not unmount the files and directories, they might get a "stale file handle" error message after the volume reversion.
2	If...	Then...
	You know the name of the Snapshot copy for reverting each volume you want to revert	Go to Step 6.
	You want to choose a Snapshot copy from the list of Snapshot copies available for reversion	Go to Step 3.
3	Enter the following command: snap restore -t vol volume_name `-t vol` specifies the volume name to revert. volume_name is the name of the volume to be reverted. Enter the name only, not the complete path. You can enter only one volume name. Note Use the -f option to avoid warning messages and prompts to confirm your decision to revert the volume. See the na_snap(1) man page for more information.
4	Press `y` to confirm that you want to revert the volume. Result Data ONTAP displays a list of Snapshot copies.
5	Enter the name of the Snapshot copy for reverting the volume, then go to Step 8. Result Data ONTAP displays the name of the volume to be reverted and the name of the Snapshot copy to be used for the reversion.
6	Enter the following command: snap restore -t vol -s snapshot_name volume_name `-t vol` specifies the volume name to revert. `-s` snapshot_name specifies the name of the Snapshot copy from which to revert the data. You can enter only one Snapshot copy name. volume_name is the name of the volume to be reverted. Enter the name only, not the complete path. You can enter only one volume name.
7	Press `y` to confirm that you want to revert the volume. Result Data ONTAP displays the name of the volume and the name of the snapshot for the reversion and, if you have not used the `-f` option, prompts you to decide whether to proceed with the reversion.
8	If...	Then...
	You want to continue with the reversion	Press `y`. Result The system reverts the volume from the selected Snapshot copy. If you are reverting the root volume, the system reboots.
	You do not want to proceed with the reversion	Press `n` or `Ctrl-C`. Result The volume is not reverted and you are returned to a prompt.

Example

system> snap restore -t vol -s nightly.0 /vol/vol1

system> WARNING! This will restore a volume from a snapshot into 
the active filesystem.  If the volume already exists in the active 
filesystem, it will be overwritten with the contents from the 
snapshot.

Are you sure you want to do this? y

You have selected file /vol/vol1, snapshot nightly.0

Proceed with restore? y

Result

Data ONTAP restores the volume called vol1 at /vol/vol1.

After a volume is reverted with SnapRestore, all user-visible information (data and attributes) for that volume in the active file system is identical to that contained in the Snapshot copy.