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Does Bare Metal Recovery backup changes after initial image? RRS feed

  • Question

  • We have DPM 2010 and are taking a Bare Metal Recovery of several Windows 2008 servers. After the initial image is taken does DPM then backup only changes?

    The reason I ask is because the BMR is in a protection group that has a recovery range of 21 days. Would we be saving any storage space by lessening the recovery range? If so, would we be able to create a separate protection group for the same server for just the BMR with decreased days?

    Wednesday, January 2, 2013 3:27 PM

Answers

  • Hi,

    BMR backup is always a full backup each time, however, the way that VSS snapshots work, only blocks that are different in the .vhd will be copied to the recovery point volume as the .vhd is overwritten on the DPM replica volume.  Depending on the Role of the server, you can get away with fewer recovery points, so putting BMR in a separate PG will save you space in the long run.  It's a combination of retention range, and backup frequency that will determine how much space is required for the BMR backups. 


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Thursday, January 3, 2013 9:58 PM
    Moderator

All replies

  • Hi,

    BMR backup is always a full backup each time, however, the way that VSS snapshots work, only blocks that are different in the .vhd will be copied to the recovery point volume as the .vhd is overwritten on the DPM replica volume.  Depending on the Role of the server, you can get away with fewer recovery points, so putting BMR in a separate PG will save you space in the long run.  It's a combination of retention range, and backup frequency that will determine how much space is required for the BMR backups. 


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Thursday, January 3, 2013 9:58 PM
    Moderator
  • Thanks. Excellent explanation.
    Monday, January 7, 2013 6:53 PM