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Can the Primary DPM backup BMR and System State of the Primary DPM to a SAN? RRS feed

  • Question

  • Hi, I have successfully used a Secondary DPM server to backup a primary DPM server on the same network router using Gigabit and with two sets of licenses.

    However can the primary DPM server use a SAN attached to it and back up to the SAN BMR of itself?  Can i do this using the Licenses only on the Primary DPM? or must i have a secondary DPM and secondary Licenses to backup the primary DPM?

    To recap, Can the Primary DPM backup BMR and System State of the Primary DPM to a SAN, so that in the event Primary DPM went down we can rebuilt it by the data on the SAN?

    Monday, January 17, 2011 9:36 PM

Answers

  • DPM has the capability to utilise custom volumes to store the data from a protected server in its 'replica volume' and 'recovery point volume'. If your DPM server was SAN attached in theory you could either present a LUN from the SAN to DPM to use as a raw disk and let DPM manage the volumes or create custom volumes on that LUN and use these for DPM. You can use the Primary DPM server to protect the BMR of itself to that location that is not local to the DPM server necessarily but the data is retained on the SAN.

    In the event the DPM server failed as long as you could attach the SAN disk allocated to DPM for backing up System State, then you could access the data on that volume for use in the System State restore.

    Alternatively you could utilise the Windows Backup components to backup system state as a scheduled task to another server using the SAN and segregate the DPM System State Data from the DPM server maintained data. On the DPM server you'll find a bmrbackup.cmd in the c:\program files\microsoft dpm\dpm\bin folder which will provide you the command to run to get the system state.

    Keep in mind that the challenge in the event that the primary DPM server fails, will be to reassociate the restored DPM server with it's DPM disks in the order in which they were prior to the outage (whether that was data on the SAN or on the local DPM server). The DPM application will be expecting the volume GUIDs to match those prior to the restore of the DPM server (if disks can be re-attached and brought online) and you would probably need to use DPMSync to match replica volumes http://technet.microsoft.com/en-us/library/ff634215.aspx.

    Hope this is helpful.

    Tuesday, January 18, 2011 3:18 AM

All replies

  • DPM has the capability to utilise custom volumes to store the data from a protected server in its 'replica volume' and 'recovery point volume'. If your DPM server was SAN attached in theory you could either present a LUN from the SAN to DPM to use as a raw disk and let DPM manage the volumes or create custom volumes on that LUN and use these for DPM. You can use the Primary DPM server to protect the BMR of itself to that location that is not local to the DPM server necessarily but the data is retained on the SAN.

    In the event the DPM server failed as long as you could attach the SAN disk allocated to DPM for backing up System State, then you could access the data on that volume for use in the System State restore.

    Alternatively you could utilise the Windows Backup components to backup system state as a scheduled task to another server using the SAN and segregate the DPM System State Data from the DPM server maintained data. On the DPM server you'll find a bmrbackup.cmd in the c:\program files\microsoft dpm\dpm\bin folder which will provide you the command to run to get the system state.

    Keep in mind that the challenge in the event that the primary DPM server fails, will be to reassociate the restored DPM server with it's DPM disks in the order in which they were prior to the outage (whether that was data on the SAN or on the local DPM server). The DPM application will be expecting the volume GUIDs to match those prior to the restore of the DPM server (if disks can be re-attached and brought online) and you would probably need to use DPMSync to match replica volumes http://technet.microsoft.com/en-us/library/ff634215.aspx.

    Hope this is helpful.

    Tuesday, January 18, 2011 3:18 AM
  • Just a little addon - a DPM server cannot protect itself for BMR.
    My DPM blog ystartsev.wordpress.com
    Tuesday, January 18, 2011 6:52 AM
    Moderator