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Dell PowerVault ME4 Series Storage System CLI Guide

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rollback volume


Description	Replaces the data in a parent volume with the data from one of its snapshots. This reverts the volume data to its state at an earlier point in time. The volume's characteristics are not changed. Any parent volume in a snapshot tree can be rolled back, but the data source must be a direct child snapshot. For example, in the following snapshot tree: Vol1 \|- Vol1Snap \|- Vol1SnapSnap you can roll back Vol1 from Vol1Snap, or roll back Vol1Snap from Vol1SnapSnap. The command will prompt you to unmount the volume and the snapshot from all initiators before starting the rollback operation to avoid data loss. CAUTION:All data that differs between the parent volume and the snapshot will be lost. Create a snapshot of the parent volume as it currently exists before performing a rollback. NOTE:For virtual storage, you cannot exclude modified write data in a snapshot from being used in a rollback. If you will want to do that, plan ahead and take a snapshot of the original snapshot before writing to it. Make the child snapshot read-only and use it for the rollback.
Minimum role	manage
Syntax	rollback volume [prompt yes\|no] snapshot `snapshot` `volume`
Parameters	[prompt yes\|no] Optional. For scripting, this specifies an automatic reply to confirmation prompts: yes: Allow the command to proceed. no: Cancel the command. If this parameter is omitted, you must manually reply to prompts. snapshot `snapshot` The name or serial number of the snapshot containing the data to roll back to. A name that includes a space must be enclosed in double quotes. `volume`The name or serial number of the volume to roll back. A name that includes a space must be enclosed in double quotes.
Examples	Roll back volume `Vol1` from snapshot `Vol1Snap`. # rollback volume snapshot Vol1Snap Vol1
See also	show snapshots show volumes