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From: "André Teichert" <andre_teichert@gmx.de>
To: linux-raid@vger.kernel.org
Subject: Re: mdadm raid5 dropped 2 disks
Date: Sat, 6 Feb 2016 11:54:59 +0100	[thread overview]
Message-ID: <56B5D103.8070908@gmx.de> (raw)
In-Reply-To: <56B479DD.7070600@gmx.de>

Hi Wol,
the raid is save now. I didnt work on the disks itself only with images.

dd if=/dev/sd[abc]1 of=/mnt/image[123].dd bs=1

losetup /dev/loop1 /mnt/image1.dd
losetup /dev/loop2 /mnt/image2.dd

mdadm --create /dev/md0 --raid-devices=3 --level=5 --assume-clean 
--size=976631296 --raid-devices=3 missing /dev/loop2 /dev/loop1

fsck without any errors. Data is back!

What I maybe did wrong in the first run?
1) I wrote the first backup of the disks to partitions, that were a 
little bigger than the original one. These were fresh drives with no 
data writen so far.
2) I did the create with the right order (missing loo2 loop1)  from 
mdadm -E "Device Role"

glad it worked. Will save lsdrv and hope never to use it. Create new 
backupplan!

cheers

  parent reply	other threads:[~2016-02-06 10:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-05 10:30 mdadm raid5 dropped 2 disks André Teichert
2016-02-06  9:45 ` Wols Lists
2016-02-06 10:54 ` André Teichert [this message]
2016-02-06 11:46   ` Wols Lists
2016-02-06 14:03     ` Phil Turmel

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