From: Maurice Hilarius <maurice@harddata.com>
To: Luca Berra <bluca@comedia.it>
Cc: linux-raid@vger.kernel.org, Neil Brown <neilb@suse.de>
Subject: Re: strange RAID5 problem
Date: Tue, 09 May 2006 16:19:22 -0600 [thread overview]
Message-ID: <4461156A.3050903@harddata.com> (raw)
In-Reply-To: <20060509192053.GA27247@percy.comedia.it>
Luca Berra wrote:
> ..
>>> I don't believe you, prove it (/proc/partitions)
>>>
>> I understand. Here we go then. Devices in question bracketed with "**":
>>
> ok, now i do.
> is the /dev/sdw1 device file correctly created?
> you could try straceing mdadm to see what happens
>
> what about the other suggestion? trying to stop the array and restart
> it, since it is marked as inactive.
> L.
>
Here is what we ended up doing that fixed it.
Thanks to Neil on the --force, however even with that,
ALL parameters were needed on the mdadm -C or it still refused.
We used EVMS to rebuild as that is what originally created the RAID.
mdadm -C /dev/md3 --chunk=256 --level=5 --parity=ls --raid-devices=16
--force /dev/evms/.nodes/sdq1 /dev/evms/.nodes/sdr1
/dev/evms/.nodes/sds1 /dev/evms/.nodes/sdt1 /dev/evms/.nodes/sdu1
/dev/evms/.nodes/sdv1 missing /dev/evms/.nodes/sdx1
/dev/evms/.nodes/sdy1 /dev/evms/.nodes/sdz1 /dev/evms/.nodes/sdaa1
/dev/evms/.nodes/sdab1 /dev/evms/.nodes/sdac1 /dev/evms/.nodes/sdad1
/dev/evms/.nodes/sdae1 /dev/evms/.nodes/sdaf1
Notice we are assembling a device with a "missing" member, and the
devices are in "order" per: mdamd -D /dev/md3
This was the *only* that it would come up. It was mountable, data seems
intact.
We started the rebuild with no errors by simply adding the device
as I mentioned before with -a.
Then sped it up via:
echo "100000" > /proc/sys/dev/raid/speed_limit_min
Because frankly we have the resources to do so and need it going as fast
as possible.
--
Regards,
Maurice
next prev parent reply other threads:[~2006-05-09 22:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-09 5:30 strange RAID5 problem Maurice Hilarius
2006-05-09 5:45 ` Neil Brown
2006-05-09 5:58 ` Luca Berra
2006-05-09 16:16 ` Maurice Hilarius
2006-05-09 19:20 ` Luca Berra
2006-05-09 22:19 ` Maurice Hilarius [this message]
2006-05-10 14:54 ` Thanks! Was:[Re: strange RAID5 problem] Maurice Hilarius
2006-05-09 6:12 ` strange RAID5 problem CaT
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