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NetVault Plug-in for SnapMirror to Tape 10.0.5 - User Guide

Restoring Differential Backups

To restore data from a Differential Backup sequence
1
Before starting the restore procedure, place the destination volume in restricted mode. For more information, see Prerequisites.
2
Restore the Full Backup. For more information, see Restore procedure. When restoring the Full Backup, do not select the Break Mirror on Exit check box.
3
Restore the most recent Differential Backup. For more information, see Restore procedure. When restoring the Differential Backup, do not select the Break Mirror on Exit check box
 
 
*IMPORTANT: When restoring the Full Backup, if you select the Break Mirror on Exit check box or issue the snapmirror break statement, you cannot restore any Differential Backup.
A volume must be in a SnapMirror Relationship to restore the Differential Backup. If you break the SnapMirror Relationship before restoring a Differential Backup, restore the Full Backup again, and then restore the applicable Differential Backup.
4
When a snapshot is restored to a volume, a SnapMirror Relationship is established for the volume and the volume type is marked as read only. After the restore job is completed successfully, you must break the relationship and mark the volume as writable.
To do break the SnapMirror relationship:
•
Start a Telnet session, and log on to the filer on which the snapshot was restored. At the prompt, type:
snapmirror break <target volume>

Using other restore procedures

This section includes the following topics:
•
Renaming a volume during restore
•
Restoring data to an alternate NetApp filer

Renaming a volume during restore

To restore a volume without overwriting the existing copy, you can rename the item during restore.
To rename a volume during restore
1
Complete Step 1 through Step 3 in the section Restore procedure.
2
Select the volume that you want to rename, and in the Actions list, click Rename.
3
In the Restore Rename dialog box, configure the following option:
•
Rename: Type a new name for the selected volume. You must provide the full path. For example, type /vol/vol1 to rename vol0 to vol1. Verify that the target volume is available on the filer and it is offline.
Click OK to close the dialog box.
After you close the dialog box, the plug-in updates the corresponding node in the selections tree to display the new name for the volume.
4
Complete Step 4 through Step 9 in the section Restore procedure.

Restoring data to an alternate NetApp filer

To relocate a file or directory to an alternate client, use the following procedure. This procedure can be useful when the original filer is unavailable or dealing with limited capacity or bandwidth.
Prerequisites
Before you start the restore procedure, verify that the following requirements are met:
•
Add the new NetApp filer to the plug-in. For more information, see Adding a NetApp filer.
•
Verify that the size of the target volume is equal to or larger than the original volume.
This requirement must be met even if the amount of data to be transferred is smaller than the overall size of the target volume. For example, if the original volume size is 10GB and the snapshot size is 2GB, relocating this data to a volume that is only 5GB in size results in a failure.
Restore procedure
To restore data to an alternate filer
1
Complete Step 1 through Step 3 in the section Restore procedure.
2
Click Edit Plugin Options, and configure the following option:
•
NDMP Server: This option specifies the target filer name. By default, it is set to the name of the original filer from which the data was backed up. To relocate the data to an alternate server, type the name of the target filer.
3
If applicable, configure the Break Mirror on Exit option. For more information, see Restore options for Plug‑in for SnapMirror to Tape.
4
Complete Step 5 through Step 9 in the section Restore procedure.
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