Accessing a storage-side snapshot of a cluster-shared volume

Posted by syneticon-dj on Server Fault See other posts from Server Fault or by syneticon-dj
Published on 2013-10-31T20:23:07Z Indexed on 2013/10/31 21:57 UTC
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From time to time I am in the situation where I need to get data back from storage-side snapshots of cluster shared volumes. I suppose I just never figured out a way to do it right, so I always needed to:

  1. expose the shadow copy as a separate LUN
  2. offline the original CSV in the cluster
  3. un-expose the LUN carrying the original CSV
  4. make sure my cluster nodes have detected the new LUN and no longer list the original one
  5. add the volume to the list of cluster volumes, promote it to be a CSV
  6. copy off the data I need
  7. undo steps 5. - 1. to revert to the original configuration

This is quite tedious and requires downtime for the original volume. Is there a better way to do this without involving a separate host outside of the cluster?

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