Things may have changed in OT since I last was concerned with tape backups but as I recall a snapmirrored *volume* can’t take the backup snapshot because it’s RO.  So you point the backup software at the newest snapshot in the RO volume and back up that view.

The only reason the NDMP backup makes a snapshot is to guarantee consistency.  An existing snapshot already has that.

Jeff Kennedy

Qualcomm, Incorporated

QCT Engineering Compute

858-651-6592

From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Fred Grieco
Sent: Tuesday, November 16, 2010 6:26 AM
To: toasters@mathworks.com
Subject: NDMP backup of snapmirror target

I am snapmirroring several volumes to a DR site, and I would like to do tape backups at that site.  How should I do them?  Can I use NDMP?

It seems like I can't do straight NDMP because the replicated target is read-only.  I am currently creating flexclones from snapshots existing in the volume (nightly.0...) but flexclone then locks this snapshot and snapmirror will fail to update  ( I'm not sure if this happens at the next update or when the source system attempts to remove that snapshot and copy it over... I wasn't watching).

What do you generally do to get snapmirrored volume data to tape?

TIA,

Fred