From: Luca Berra <bluca@comedia.it>
To: Adam Newham <adam@thenewhams.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Unable to mount LVM partition - table too small
Date: Thu, 23 Sep 2010 23:12:34 +0200 [thread overview]
Message-ID: <20100923211234.GA17638@maude.comedia.it> (raw)
In-Reply-To: <4C9B91A5.5020908@thenewhams.com>
>
> I also don't remember ever seeing /dev/md0p1 before, just a /dev/md0
i guessed as much
> root@adam-desktop:~# mdadm --examine --scan --verbose
> ARRAY /dev/md0 level=raid5 num-devices=4
> UUID=b5e0fcd0:cfadbb04:a5b6f22e:457f47ae
> devices=/dev/sde,/dev/sdd,/dev/sdc,/dev/sdb
the above is the wrong md0 using whole disks
this one is the correct one
> ARRAY /dev/md0 level=raid5 num-devices=4
> UUID=08558923:881d9efd:464c249d:988d2ec6
> devices=/dev/sde1,/dev/sdd1,/dev/sdc1,/dev/sdb1
>
> root@adam-desktop:~# mdadm --examine --verbose /dev/sdb
> root@adam-desktop:~# mdadm --examine --verbose /dev/sdc
> root@adam-desktop:~# mdadm --examine --verbose /dev/sdd
> root@adam-desktop:~# mdadm --examine --verbose /dev/sde
you did not dump the partitions, but i guess you couldn't since the
device files disappeared
> root@adam-desktop:~# cat /proc/mdstat
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
> [raid4] [raid10]
> md0 : active raid5 sde[3] sdb[0] sdc[1] sdd[2]
> 2930287488 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
>
> unused devices: <none>
>
put
DEVICE /dev/sd?1
ARRAY /dev/md0 level=raid5 num-devices=4 UUID=08558923:881d9efd:464c249d:988d2ec6
into /etc/mdadm.conf (or /etc/mdadm/mdadm.conf, whatever ubuntu places
it) and reboot, you should be able to see your data.
after this ask on linux-raid ml for advice on how to zero the duplicate
superblock.
L.
--
Luca Berra -- bluca@comedia.it
Communication Media & Services S.r.l.
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next prev parent reply other threads:[~2010-09-23 21:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-07 17:34 [linux-lvm] Unable to mount LVM partition - table too small Adam Newham
2010-09-20 20:52 ` Adam Newham
2010-09-22 6:21 ` Luca Berra
2010-09-22 15:39 ` Adam NEWHAM
2010-09-23 6:43 ` Luca Berra
2010-09-23 17:43 ` Adam Newham
2010-09-23 21:12 ` Luca Berra [this message]
2010-09-24 16:25 ` Adam Newham
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