Mailinglist Archive: opensuse-factory (279 mails)

["Carlos E. R." <robin.listas@xxxxxxxxxxxxxx>]

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On Tuesday, 2009-03-10 at 10:03 -0400, Greg Freemyer wrote:

...

> If you're really curious, hdparm can create and recover bad blocks on
> your media.  (I think it needs a IDE/SATA hdd to work).
>
> see hdparm --make-bad-sector  and   --repair-sector

Interesting...

> When it creates them it uses a ATA diagnostic write to cause the per
> sector crc to be bad, then on read you get a media error.
>
> (ie on disk sectors are bigger than 512 bytes.  Part of the overhead
> is a crc used to verify the media has not failed.)
>
> Not sure how it does the fix side, but you are not supposed to
> permanently loose the sector, thus it is more or less safe to test
> with.
>
> I would use a drive that does not have critical data.  And I assume
> hdparm will be counting sectors from the beginning of the drive, not
> the partition.

I'm interested, but not so much as to try with a disk that is in actual 
use >:-)

I'll save this for possible future reference.

- -- 
Cheers,
       Carlos E. R.
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