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My friend recently formatted his computer and after installing Windows 7 again the system does not allow access to his backup HDD anymore.

Opening it in Computer triggers the "The drive is not formatted." prompt, Disk Management claims that the file system is RAW, but CHKDSK still considers it an NTFS drive and finishes check with the following message:

The type of the file system is NTFS.
Unable to determine volume version and state. CHKDSK aborted.

I've told him to run TestDisk and try to repair the BS and MFT, the BS and backup BS are the same (according to TestDisk), but trying to repait the MFT caused an error:

MFT and MFT mirror are bad. Failed to repair them.

Analyzing the disk showed, that the data is still there, although on FAT32 partition, but the first few sectors of the drive are recognized as FAT12 (?):

Screenshot of the analysis results

How can we regain access to the partition?

share|improve this question
What caused the hdd's parition to be corrupted.? The screeshot only displays FAT12 and FAT32....**explain!** – Ramhound Jun 15 '12 at 16:00
@Ramhound: Oops, sorry, I was supposed to write "on the FAT32 partition", corrected. The drive got corrupted after a restart of the machine. Nothing else was changed in it. – Schocker Jun 15 '12 at 16:11

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