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Thread: The backup file contains unrecognized data and cannot be used - but it's not corrupt!

  1. #1
    kazza Guest

    The backup file contains unrecognized data and cannot be used - but it's not corrupt!

    I'm getting an error when attempting to restore a file created with
    windows backup - "The backup file contains unrecognized data and cannot
    be used" .. however the file is not corrupt, because I can open and
    restore from it on the machine that it was created on, just not another
    machine.

    The backup is created on a standalone (workgroup) server that's not
    part of any domain. The backup of the system is saved locally to its
    own hard drive, then a script copies it across to another server for
    backup to tape. The remote server is on our main domain.

    If I try to restore the file on the server that created it, it restores
    fine. However if I try to restore it on the domain server, I get the
    above error. I'm guessing it might have something to do with the fact
    that one machine is on the domain and the other is not, but I could be
    wrong. The option to only allow administrators to restore the file is
    turned off.

    Both servers are running windows 2003, latest service packs and
    patches.

    Anyone have any ideas?


  2. #2
    Pegasus \(MVP\) Guest

    Re: The backup file contains unrecognized data and cannot be used - but it's not corrupt!


    "kazza" <google@kazza.id.au> wrote in message
    news:1163980279.329290.103350@f16g2000cwb.googlegroups.com...
    > I'm getting an error when attempting to restore a file created with
    > windows backup - "The backup file contains unrecognized data and cannot
    > be used" .. however the file is not corrupt, because I can open and
    > restore from it on the machine that it was created on, just not another
    > machine.
    >
    > The backup is created on a standalone (workgroup) server that's not
    > part of any domain. The backup of the system is saved locally to its
    > own hard drive, then a script copies it across to another server for
    > backup to tape. The remote server is on our main domain.
    >
    > If I try to restore the file on the server that created it, it restores
    > fine. However if I try to restore it on the domain server, I get the
    > above error. I'm guessing it might have something to do with the fact
    > that one machine is on the domain and the other is not, but I could be
    > wrong. The option to only allow administrators to restore the file is
    > turned off.
    >
    > Both servers are running windows 2003, latest service packs and
    > patches.
    >
    > Anyone have any ideas?
    >


    I suspect that the two machines are using different flavours of
    ntbackup.exe and can therefore not process .bkf files created
    by the other machine.



  3. #3
    kazza Guest

    Re: The backup file contains unrecognized data and cannot be used - but it's not corrupt!


    > I suspect that the two machines are using different flavours of
    > ntbackup.exe and can therefore not process .bkf files created
    > by the other machine.


    They're both using ntbackup 5.2.3790.1830

    If I try to open the backup file on a third server, that is also a
    completely standalone machine, it can open the backup file ok too. I
    wonder if it really is something to do with whether the machine is on
    the domain or not....


  4. #4
    Alfmeister Guest

    Re: The backup file contains unrecognized data and cannot be used - but it's not corrupt!

    Out of interest, although it's not really a corrupt backup file, you might want to try a backup repair utility to see if that can see/open the file on the system concerned.

    Take a look at and try the free demo version of the product it recommends. It provides a visual preview window that shows the contents of each file within the bkf backup file so you can see what you system thinks is recoverable using it. Just thought it might be another angle to explore.

  5. #5
    alanlisa Guest

    Re: The backup file contains unrecognized data and cannot be used - but it's not corrupt!

    In this situation,your bkf file may have damaged and need to fix it.Here are some BKF file recovery tools to repair your BKF file.

    Most of them provide a free demo so you can try first.

    Alan

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