NetApp
Vserver : Protection : SnapMirror : Managing mirror relationships for Data ONTAP 8.2 : Updating mirror relationships
Updating mirror relationships
You can initiate an unscheduled mirror update of the destination. You might have to perform a manual update to prevent data loss due to an upcoming power outage, scheduled maintenance, or data migration.
Before you begin 
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The mirror relationship must be in a Snapmirrored state.
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You must have enabled password caching and saved the storage system credentials.
Steps 
1.
From the home page, double-click the appropriate storage system.
2.
Expand the Storage Virtual Machines hierarchy in the left navigation pane.
3.
In the navigation pane, select the Storage Virtual Machine (SVM) that contains the destination volume and click Protection.
4.
Select the mirror relationship that you want to update the data, and click Operations > Update.
5.
Choose one of the following options:
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Select On demand to perform an incremental transfer from the recent common Snapshot copy between the source and destination volumes.
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Select Select Snapshot copy and specify the Snapshot copy that you want to transfer.
6.
Select Limit transfer bandwidth to to limit the network bandwidth used for transfers and specify the maximum transfer speed.
7.
Click Update.
8.
Verify the transfer status in the Details tab.
Related reference 
Protection window

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