From: Bill Davidsen <davidsen@tmr.com>
To: Neil Brown <neilb@suse.de>
Cc: greg@enjellic.com, Eyal Lebedinsky <eyal@eyal.emu.id.au>,
linux-raid list <linux-raid@vger.kernel.org>
Subject: Re: mismatch_cnt again
Date: Sat, 14 Nov 2009 20:54:18 -0500 [thread overview]
Message-ID: <4AFF5F4A.5000504@tmr.com> (raw)
In-Reply-To: <19196.50228.743428.552300@notabene.brown>
Neil Brown wrote:
> On Thursday November 12, greg@enjellic.com wrote:
>
>> Neil/Martin what do you think?
>>
>
> I think that if you found out which blocks were different and mapped
> that back through the filesystem, you would find that those blocks are
> not a part of any file, or possibly are part of a file that is
> currently being written.
>
Well, I have a bunch on my /boot partition, so here's my test plan.
Please comment on the safety of this plan as you see it.
- remount the raid-1 array read-only. It shouldn't be changing!
- mount 1st component r/o and do md5sum on every file[1]
- for each other component, mount r/o and check every file
Investigate any mismatches found in real data.
The alternative involves taking the system down and doing this from a
Live-CD. Since most of my servers and desktops (including this one) run
in VMs on the server in question, this is safer but not likely to happen
soon.
--
Bill Davidsen <davidsen@tmr.com>
"We can't solve today's problems by using the same thinking we
used in creating them." - Einstein
next prev parent reply other threads:[~2009-11-15 1:54 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-12 19:20 mismatch_cnt again greg
2009-11-13 2:28 ` Neil Brown
2009-11-13 5:19 ` Goswin von Brederlow
2009-11-15 1:54 ` Bill Davidsen [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-11-16 21:36 greg
2009-11-16 22:14 ` Neil Brown
2009-11-17 4:50 ` Goswin von Brederlow
2009-11-07 0:41 Eyal Lebedinsky
2009-11-07 1:53 ` berk walker
2009-11-07 7:49 ` Eyal Lebedinsky
2009-11-07 8:08 ` Michael Evans
2009-11-07 8:42 ` Eyal Lebedinsky
2009-11-07 13:51 ` Goswin von Brederlow
2009-11-07 14:58 ` Doug Ledford
2009-11-07 16:23 ` Piergiorgio Sartor
2009-11-07 16:37 ` Doug Ledford
2009-11-07 22:25 ` Eyal Lebedinsky
2009-11-07 22:57 ` Doug Ledford
2009-11-08 15:32 ` Goswin von Brederlow
2009-11-09 18:08 ` Bill Davidsen
2009-11-07 22:19 ` Eyal Lebedinsky
2009-11-07 22:58 ` Doug Ledford
2009-11-08 15:46 ` Goswin von Brederlow
2009-11-08 16:04 ` Piergiorgio Sartor
2009-11-09 18:22 ` Bill Davidsen
2009-11-09 21:50 ` NeilBrown
2009-11-10 18:05 ` Bill Davidsen
2009-11-10 22:17 ` Peter Rabbitson
2009-11-13 2:15 ` Neil Brown
2009-11-09 19:13 ` Goswin von Brederlow
2009-11-08 22:51 ` Peter Rabbitson
2009-11-09 18:56 ` Piergiorgio Sartor
2009-11-09 21:14 ` NeilBrown
2009-11-09 21:54 ` Piergiorgio Sartor
2009-11-10 0:17 ` NeilBrown
2009-11-10 9:09 ` Peter Rabbitson
2009-11-10 14:03 ` Martin K. Petersen
2009-11-12 22:40 ` Bill Davidsen
2009-11-13 17:12 ` Martin K. Petersen
2009-11-14 17:01 ` Bill Davidsen
2009-11-17 5:19 ` Martin K. Petersen
2009-11-14 19:04 ` Goswin von Brederlow
2009-11-17 5:22 ` Martin K. Petersen
2009-11-10 19:52 ` Piergiorgio Sartor
2009-11-13 2:37 ` Neil Brown
2009-11-13 5:30 ` Goswin von Brederlow
2009-11-13 9:33 ` Peter Rabbitson
2009-11-15 21:05 ` Piergiorgio Sartor
2009-11-15 22:29 ` Guy Watkins
2009-11-16 1:23 ` Goswin von Brederlow
2009-11-16 1:37 ` Neil Brown
2009-11-16 5:21 ` Goswin von Brederlow
2009-11-16 5:35 ` Neil Brown
2009-11-16 7:40 ` Goswin von Brederlow
2009-11-12 22:57 ` Bill Davidsen
2009-11-09 18:11 ` Bill Davidsen
2009-11-09 20:58 ` Doug Ledford
2009-11-09 22:03 ` Eyal Lebedinsky
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