Damaged partition

Discussion in 'Acronis True Image Product Line' started by Azdon, Jun 14, 2006.

Thread Status:
Not open for further replies.
  1. Azdon

    Azdon Registered Member

    Joined:
    May 26, 2006
    Posts:
    90
    Acronis,
    Why, after doing a full disk image backup from rescue boot CD, and successfully verifying the archive, would the mounting screen show one partition of the disk image to have a red circle with white cross in the top left? User Manual notes it may be a damaged partition, but why did TI verify the archive then? Is there a way to repair the image? This relates to my previous pretty long thread "interesting image size"
    Don
    TI 9.0 (3633)
     
  2. seekforever

    seekforever Registered Member

    Joined:
    Oct 31, 2005
    Posts:
    4,751
    You might of thought an error window would have popped up when you made the image.

    However, if TI was able to read the partition to its satisfaction then it created an archive. The Verify or Validate of an archive is NOT a comparison with the original data or anything else, when the image is created TI calculates a checksum or checksums of the data (I don't know if it is one checksum or more) and the Validate function recalculates this checksum for the image file and compares it with the stored checksum in the archive. If they match the archive is deemed good.

    Note that if TI is happily reading bad information from the disk it will still compute its checksum and a subsequent validate performed on the archive will show it as OK. For this reason I think it is a good idea to run chkdsk X: /r every now and then before a backup to ensure the disk structure being backed up is still good as far as XP goes. Substitute X for the drive letter of the partition being tested. C requires reboot.

    This may tie in to your big size archive since if TI can't make sense of the partition format it will then back it all up instead of just the in-use sectors since it has no way of determing what they are. The numbers you got don't agree but who knows what it thought was on the disk if the structure is damaged.

    Suggest you run chkdsk as described above on the whole disk (all partitions) if you haven't done so just to see what it says.
     
  3. Azdon

    Azdon Registered Member

    Joined:
    May 26, 2006
    Posts:
    90
    Thanks seekforever. I'll do that (chkdsk), but I think the 'damage' is on the partition image and not the actual partition since re-doing it turned out the right size and no damage indicators. Thanks too on what 'verify' does and doesn't do.
     
  4. Acronis Support

    Acronis Support Acronis Support Staff

    Joined:
    Apr 28, 2004
    Posts:
    25,885
    Hello Azdon,

    Please find my answer in this thread you have started.

    Thank you.
    --
    Aleksandr Isakov
     
Thread Status:
Not open for further replies.