Reverting a volume to a selected snapshot

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. 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 for reverting each volume you want to revert	Go to Step 6.
	You want to choose a snapshot from the list of snapshots available for reversion	Go to Step 3.
3	Enter the following command: snap restore[-f] [-t vol] volume_name The `-f` option suppresses the warning message and the prompt for confirmation. The `-t vol` option 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. Result If you have not used the `-f` option, Data ONTAP displays a warning message and prompts you to confirm your decision to revert the volume.
4	Press `y` to confirm that you want to revert the volume. Result Data ONTAP displays a list of snapshots.
5	Enter the name of the snapshot 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 to be used for the reversion.
6	Enter the following command: snap restore [-f] [-t vol] volume_name [-s snapshot_name] `-f` suppresses the warning message and the prompt for confirmation. This option is useful for scripts. `-t vol` volume_name specifies the volume name (volume_name) to revert. `-s` snapshot_name specifies the name of the snapshot from which to revert the data. You can enter only one snapshot 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. Result If you have not used the `-f` option, Data ONTAP displays a warning message and prompts you to confirm your decision to revert the volume.
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 filer reverts the volume from the selected snapshot. If you are reverting the root volume, the filer reboots the system.
	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 filer prompt.

Example

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

filer> 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.