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I've been using dd/ddrescue to clone a hard drive with several bad sectors. Some sectors were definitely unrecoverable, but I'm wondering if there's any way to tell which files might have been tied to/spanned across those sectors (via the destination drive, if possible).

I was also unable to recover anything beyond 25GB on that partition, which was 50GB in total, and I'm pretty sure it was nearly full. Is there any way to tell which files might have spanned or been fragmented beyond that 25GB?

FYI, the partition was an HFS+ formatted Mac drive, but I have access to Ubuntu, OSX and Windows, and can thus use any utility of any OS.

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Have a look at Spin Rite, as it may be able to recover data on your HDD which is unrecoverable by other software.

Spin Rite has a very good reputation.

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I have heard a lot of good things about Spin Rite, but some of it sounds too good to be true. For instance, I've heard a lot about how it can "repair" bad sectors and stuff, but it couldn't possibly do that, could it? I think it would merely remap them, but if it can't read them, it wouldn't be able to remap them, would it? And what about drives that have reached their remapping limit? Just a thought... – purefusion Jan 31 '11 at 16:04
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