* disk failure and badblocks
@ 2003-11-22 8:22 seth vidal
2003-11-22 14:12 ` Luca Berra
0 siblings, 1 reply; 4+ messages in thread
From: seth vidal @ 2003-11-22 8:22 UTC (permalink / raw)
To: linux-raid
Hi,
I had a disk fail out of sw-raid5 array with a medium error. I'd like
to check the disk for bad blocks, and if it shows up with some, call me
vendor and get them to replace the disk. In the past I've shut the
machine down and run the scsi bios media check. Would it be possible for
me to remove this disk from the array and run badblocks on it to get the
same information? If I could not shut down the system I would prefer to.
My major wonder is will badblocks be effective for looking for a medium
error?
Thanks,
-sv
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: disk failure and badblocks
2003-11-22 8:22 disk failure and badblocks seth vidal
@ 2003-11-22 14:12 ` Luca Berra
2003-11-22 14:57 ` seth vidal
0 siblings, 1 reply; 4+ messages in thread
From: Luca Berra @ 2003-11-22 14:12 UTC (permalink / raw)
To: linux-raid
On Sat, Nov 22, 2003 at 03:22:21AM -0500, seth vidal wrote:
>My major wonder is will badblocks be effective for looking for a medium
>error?
only if you can disable the disk onboard cache :)
a long time ago i changed badblocks write mode algo to write a pattern
to the full disk THEN check it, instead of write-block, check, next
block which was a victim of the cache. Pity i lost that patch :)
L.
--
Luca Berra -- bluca@comedia.it
Communication Media & Services S.r.l.
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: disk failure and badblocks
2003-11-22 14:12 ` Luca Berra
@ 2003-11-22 14:57 ` seth vidal
2003-11-22 15:19 ` Luca Berra
0 siblings, 1 reply; 4+ messages in thread
From: seth vidal @ 2003-11-22 14:57 UTC (permalink / raw)
To: Luca Berra; +Cc: linux-raid
On Sat, 2003-11-22 at 09:12, Luca Berra wrote:
> On Sat, Nov 22, 2003 at 03:22:21AM -0500, seth vidal wrote:
> >My major wonder is will badblocks be effective for looking for a medium
> >error?
> only if you can disable the disk onboard cache :)
> a long time ago i changed badblocks write mode algo to write a pattern
> to the full disk THEN check it, instead of write-block, check, next
> block which was a victim of the cache. Pity i lost that patch :)
What if I made the number of blocks written at any time * the block byte
size greater than the onboard disk cache? That seems like it might
circumvent the caching problem.
-sv
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: disk failure and badblocks
2003-11-22 14:57 ` seth vidal
@ 2003-11-22 15:19 ` Luca Berra
0 siblings, 0 replies; 4+ messages in thread
From: Luca Berra @ 2003-11-22 15:19 UTC (permalink / raw)
To: seth vidal; +Cc: linux-raid
On Sat, Nov 22, 2003 at 09:57:36AM -0500, seth vidal wrote:
>What if I made the number of blocks written at any time * the block byte
>size greater than the onboard disk cache? That seems like it might
>circumvent the caching problem.
it should.
L.
--
Luca Berra -- bluca@comedia.it
Communication Media & Services S.r.l.
/"\
\ / ASCII RIBBON CAMPAIGN
X AGAINST HTML MAIL
/ \
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-11-22 15:19 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2003-11-22 8:22 disk failure and badblocks seth vidal
2003-11-22 14:12 ` Luca Berra
2003-11-22 14:57 ` seth vidal
2003-11-22 15:19 ` Luca Berra
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