Unable to restore a Snapshot copy

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There are few conditions that affect the snapdrive snap restore command’s ability to restore a Snapshot copy.

  • The snapdrive snap restore command must be able to perform the following tasks:

    • Query all disk groups for a list of LUNs.

    • Query all LUNs via SCSI command. The host volumes and file systems do not need to be available and mounted for the snapdrive snap restore command to succeed.

  • The access permissions must allow the host to create and restore a Snapshot copy of information on that storage system.

  • The NFS mounted directory must be exported correctly to the host, so that it can be mounted.

Note You should always take another Snapshot copy after you add a LUN to or remove a LUN from a disk group.
  • If you add a host volume or file systems to a disk group after taking a Snapshot copy and then try to restore the Snapshot copy, you receive an error message. You must include the force option (-f) on the command-line for the restore operation to succeed in this situation.

    Note Host volumes and file systems that you add after taking a Snapshot copy are no longer accessible when you create and restore the Snapshot copy.
  • If you rename a host volume or a file system or change the mountpoint after taking a Snapshot copy and then try to restore it, the restore operation fails. You must include the force option (-f) on the command-line for the restore operation to succeed in this situation.

    Note Use the -f option with great care to make sure you do not accidentally overwrite something that you did not intend to overwrite.
  • If you rename a LUN after taking a Snapshot copy and then try to restore that Snapshot copy, the restore operation fails. After you rename a LUN, you should take a new Snapshot copy.

    Note After you start a Snapshot restore operation, do not halt it. Halting this operation might leave the system in an inconsistent state. You might then need to perform a manual recovery.