Re: "badblocks" for XFS?

[Florian Weimer <Weimer@xxxxxxxxxxxxxxxxxxxxx>]

Eric Sandeen <sandeen@xxxxxxx> writes:

> As I understand it, all modern drives do defect management internally,
> remapping data blocks as they go bad.  If you're actually seeing a bad
> block from the outside, that probably means that the drive has run out
> of blocks to remap to, and it's all downhill from there.

There is one case in which you'll see actual bad blocks with (some)
modern drivers: if a sector has not been fully written during power
down.  The sector carries bad check sums, and you get hard errors when
trying to read it.

However, writing to the block should correct the checksum and remove
the bad block.

-- 
Florian Weimer                    Weimer@xxxxxxxxxxxxxxxxxxxxx
University of Stuttgart           http://CERT.Uni-Stuttgart.DE/people/fw/
RUS-CERT                          +49-711-685-5973/fax +49-711-685-5898