HELP! Windows changed a partition to MBR and OS X won't read it!

Discussion in 'Windows, Linux & Others on the Mac' started by Inconsequential, Aug 24, 2010.

  1. Inconsequential macrumors 68000

    Sep 12, 2007
    Basically I have three partitions on one 500Gb HD and it's been working nicely for 4 months until XP decided that it didn't want to boot anymore.

    Setup is:

    150Gb: Windows 7 x64 (NTFS)
    100Gb: Windows XP x32 (NTFS)
    250Gb: Random files used on OSX (Hence formatted for OS X use)

    Now in the process of fixing the windows boot issue it's managed to **** up the 250Gb Mac partition so now Disk Utility thinks it's a MBR instead of OS X formatted.

    Is there any way of getting it back so OS X can read it without formatting it?

    It's 99% backed up but it's that 1% that i'd like back.

    Any ideas?
  2. balamw Moderator


    Staff Member

    Aug 16, 2005
    New England
    Some of the tools mentioned here: may be useful.

    Before doing anything to the partition table you should back up the rest. Since you can't access it you probably need to do a sector-by-sector image with dd or Disk Utility.

  3. Inconsequential thread starter macrumors 68000

    Sep 12, 2007
    Fixed it using testdisk :)

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