Dell Unity™ Family Unisphere® Command Line Interface User Guide

Restore a storage resource to a snapshot to return (roll back) the storage resource to a previous state. During the restore, the entire storage resource, including all files and data stored on it, is replaced with the contents of the selected snapshot.

When you restore a storage resource to a snapshot, before the restoration begins, the system will automatically create a snapshot of the storage resource's current state. This ensures that there is no unintentional data loss because of the restore operation. You can use this new snapshot later to restore the storage resource back to its previous state, if necessary.

Prerequisites

• To prevent data loss, ensure that all hosts have completed all read and write operations to the storage resource you want to restore.
• For LUN storage:
  • If the snapshot is attached, you must first detach it or an error will appear when you attempt to restore to it.
  • If a host is connected to the LUN (seen by the host as a disk) you want to restore, perform one of the following to the LUN to disconnect it from the host:
    • On Windows, disable the LUN in the Device Manager, which might require a host reboot.
    • On Linux/UNIX, run the unmount command on the virtual.
    Once the LUN is disconnected, you can continue with the restore and then enable and mount the restored LUN on the host.

Format

Object qualifier

Action qualifiers

Example

The following command restores snapshot SNAP_1, which is a snapshot of iSCSI storage:

Storage system address: 10.0.0.1
Storage system port: 443
HTTPS connection

Operation completed successfully.