Re: Linux 2.6.3-rc3 - IDE DMA errors on Thinkpad A30
From: Jeff Garzik
Date: Sun Feb 15 2004 - 23:11:42 EST
Valdis.Kletnieks@xxxxxx 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
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