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How make persistent a shadow copy created by Volume Shadow Service on WinXP RRS feed

  • Question

  • Hi there,


    According to VSS documentation, on XP the only supported shadow copy type is “non-persistent with writers” and there is no way to create persistent shadow copies or shadow copies without writers.
    But ntbackup uses VSS and according to this http://en.wikipedia.org/wiki/Shadow_Copy uses a proprietary BKF file format, so the question is How make persistent a shadow copy created by Volume Shadow Service on WinXP? (similar to what ntbackup does)

    Thanks a lot.


    Javier Andrés Cáceres Alvis
    Tuesday, March 2, 2010 10:33 PM

All replies

  • Hello Javier,

    Thanks for your post.

    VSS backup and restore operations each use a protocol for the interaction of the systems that use mass storage (writers) and those that back it up (requesters).

    Both backup and file retrieval operations are primarily driven by the requester, which controls writer and provider behavior by generating systemwide COM events for the writer to process. Because event-generating methods are asynchronous, writers do have limited control into the requester's state through the asynchronous handlers available to VSS (see IVssAsync).

    More information
    http://msdn.microsoft.com/en-us/library/aa384618(VS.85).aspx
    http://msdn.microsoft.com/en-us/library/aa384599(VS.85).aspx

    Regards,
    Rong-Chun Zhang
    MSDN Subscriber Support in Forum
    If you have any feedback on our support, please contact msdnmg@microsoft.com


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.
    Wednesday, March 3, 2010 1:17 PM
  • Hi Rong-Chun,

    Could you please look at the vshadow sample?
    That sample makes persistent shadows on Windows 2003 and non persistent on Windows XP.
    The problem is that persistent doesn't mean something like a file, that you can save to other computer.
    How can I make the resulting shadow copy a file (like ntbackup does it)?

    Javier Andrés Cáceres Alvis

    Wednesday, March 3, 2010 3:55 PM
  • Suggestions?

    Javier Andrés Cáceres Alvis
    Monday, March 8, 2010 2:44 PM