DPM d2d backup for exchange and Netbackup D2T to tape
hi team, I have a requirement to backup the replica created by DPM2012 with symantec netbackup  . We need to  backup DAG DB of the exchange 2010 servers.  DPM2012  will handle d2d backup for short term backup, retention for 1 month. D2T backup to be done by  netbackup ,  to tape libary for 7 years retention. So that when some VIP need to restore an email of many months ago, we can use the tape to restore,  and then DPM to restore the mailbox. Can this be done?  and  How to housekeep the data on the disk storage? And after restoration from tape to disk, how to get DPM to restore the history data to Exchange recovery database? Thanks for your advice so much!  --
June 14th, 2013 6:41am

Hi,

If you don't want to use DPM Disk to Disk to Tape (D2D2T) solution and instead want to utilize a 3rd party backup product for long term offsite tape backups - Using 3rd party to backup a DPM server is described here:   http://technet.microsoft.com/en-us/library/bb809019.aspx

However, restores of protected data will need to be performed to an alternate location (Not back to the DPM server) by the 3rd party application.

What I mean by this is the 3rd party backup application will be protecting the DPM replica volumes (either directly, or via a snapshot using dpmbackup replicas) and if a restore is required of a data that is older than what DPM has on disk, then the restore from tape will need to restore the files to an alternate location anywhere but the DPM replica, as that will compromise current DPM disk based backups.  

You can then manually mount the exchange database and use exchange tools to extract mailbox data.

Alternate solution would be to hardware partition the tape library and let Netbackup use one partition and DPM the other so you can do real D2D2T backup with DPM for the 7 year retention.

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June 15th, 2013 2:39am

thanks, so the replica on the disk will keep the same or changes everyday? If it changes everyday, then my 3rd party backup software - netbackup, has to do FULL tape backup everyday , which is very troublesome.  when I use netbackup to restore, the restored copy is full copy of the DAG DB ? Do I need the DPM to restore it before the exchange can use it? Thanks
June 17th, 2013 6:32am

HI,

Regardless of which tape backup solution you choose, it will need to be full backup.   If you let DPM do it, it mounts the last express full disk based recovery point and does a full backup to tape.   If you use 3rd party, you first run dpmbackup -replica - then perform a full backup from the shadowcopy folder.  

If you restore from DPM tape backup, it will restore the DB to an exchange recovery storage group (RSG) (or overwrite the current DB if that is what you choose) and bring the DB into a consistent state. If you restore from 3rd party, you need to restore as flat files, then manually run eseutil.exe to replay the logs and get the DB into consistent state, then attach it to the RSG, or overwrite existing DB.

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June 17th, 2013 6:00pm

thanks, any more details on how to use  dpmbackup -replica  ?  any scheduled script or UI to do full backup for all volumes?
June 19th, 2013 7:05am

Thanks Mike. When you said ' You can then manually mount the exchange database and use exchange tools to extract mailbox data " and it has to be restore to other server instead of DPM, do you mean I cannot use DPM to restore the exchange DB? Instead, I need to use exchange utilities for recovery when the flat files restored from tape? Thanks!
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July 2nd, 2013 8:59pm

Hi,

Yes, that is correct. DPM will have no knowledge of the files restored from 3rd party tape. It's strictly a manual process if you are not using DPM for long term tape backup.

July 2nd, 2013 10:22pm

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