Re: xfs I/O error

[Iustin Pop <iusty@k1024.org>]

On Sat, Feb 23, 2008 at 11:14:32PM +0100, Rekrutacja119 wrote:
> so i should use the list i got from badblocks with dd but with bs=1024? are
> you sure? i'm not sure what is my block size, but xfs_info says this:
the block size of the filesystem has no relation to the block size
badblocks uses in checking the block device.
> 
[...]
> 
> i think i made it with 4K stack size ... well anyways, i should use the list
> i got earlier and just try dd but with bs=1024... ? don't want to erase more
> than i have to. (i want to do it so i can smartctl -t offline /dev/sdb then,
> so maybe it will somehow see that these blocks are broken and mark them)

I don't understand what do you want to do with smartctl at all. How
would offlining the disk would help?

Again, I would:
  - take the block list given by badblocks
  - verify that each block can't be read  first via dd if=/dev/...
    of=/dev/null bs=1024 count=1 seek=NUMBER_FROM_BADBLOCK
  - if confirmed that you got the right 'bad' blocks, use that for dd
    with bs=1024 to write zeroes over them

As Eric confirmed, you probably already destroyed some good data on the
drive.

regards,
iustin