Re: Linux 2.6.3-rc3 - IDE DMA errors on Thinkpad A30

Jeff Garzik
2004-02-16T04:10:12Z

Valdis.Kletnieks@vt.edu wrote:
> On Sun, 15 Feb 2004 22:47:37 EST, Jeff Garzik said:
>
>>One for the todo list, I suppose... a useable workaround for this is
>>probably good ole 'e2fsck -c', i.e. badblocks... That says "check again
>>to see if this sector is bad", and -hopefully- will unmark bad blocks
>>that were incorrectly marked bad.
>
>
> Does e2fsck/badblocks issue the right ioctls/etc to make the disk read the
> *original* block, or will the disk simply check the *redirected* block?

I'm not sure your question has meaning.

Consider: ext2 reads sector 1234. drive returns "media error", and
then swaps the bad sector for a good one. Reboot and run badblocks.
badblocks reads sector 1234, in whatever manner the drive chooses to
present sector 1234 to the OS.

"original" versus "redirected" block is invisible to the OS. The OS
only knows that an event occured at a single point in time -- the media
error.

Jeff