Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Currently recovering a drive that had it's partition table messed up by some malware, and I have been able to successfully recover all of the partitions, just not at the same time. There are three, one is one of those old recovery partitions for vista, another is a 120 gB vista partition, and the last is a 250 gB 7 partition. I can either recover the 7 partition, or the vista and recovery, but not all three. I have tried almost every combination of partition characteristics in testdisk, and none have worked.

Here is an image of how I currently have it:

enter image description here

How can I recover all three?

share|improve this question
add comment

1 Answer

up vote 1 down vote accepted

First, to be completely safe, you should make a block copy of the entire disk. But you do need 500GB of spare space somewhere.

Sectors were originally laid out in an actual Cylinder-Head-Sector geometry (back when drives had several platters, two heads each). That geometry became a fiction a long time ago, but disk partitioning often follows cylinder boundaries anyway. Confusingly, cylinders and heads start counting from zero, but sectors start counting at one.

The problem appears to be that the end of the 120GB overlaps the start of the 250GB that follows. The 120GB ends at C:24552, H:254, S:63. Therefore, the 250GB cannot start at H:171 of the cylinder. More likely, it starts at 24553-0-1, just after.

You could try forcing the 250GB partition to start there and see if that works. If TestDisk doesn't allow this, you might try other programs; as a last resort, the partition table can be edited manually. You would also want to calculate the correct number of blocks/sectors for LBA.

share|improve this answer
    
That makes sense. Thank you. –  a sandwhich Dec 21 '11 at 3:23
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.