From: Andreas Klauer <Andreas.Klauer@metamorpher.de>
To: "Patrik Dahlström" <risca@powerlamerz.org>
Cc: linux-raid@vger.kernel.org
Subject: Re: Recover array after I panicked
Date: Sun, 23 Apr 2017 12:16:39 +0200 [thread overview]
Message-ID: <20170423101639.GA4471@metamorpher.de> (raw)
In-Reply-To: <3957da08-6ff4-3c15-e499-157244a767aa@powerlamerz.org>
On Sun, Apr 23, 2017 at 11:47:34AM +0200, Patrik Dahlström wrote:
> Is there any help you can offer?
Is there any mdadm --examine output?
What was on the array? Regular filesystem, unencrypted, or LVM, LUKS, ...?
If it's LUKS encrypted and you had RAID metadata at the end, yet
mdadm --create'd new metadata at the start, that would likely have
damaged your LUKS header beyond repair (and regular filesystems
don't like it, either).
If it's unencrypted data, as a last resort you can always go and find
the header of a large file of known type... for example if you find
a megapixel JPEG image and the first 512K of it are part of that then
your chunksize would be 512K and then you can go looking for the
next chunk on the other disks... and that should give you some notion
of the RAID layout and offset.
Regards
Andreas Klauer
next prev parent reply other threads:[~2017-04-23 10:16 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-23 9:47 Recover array after I panicked Patrik Dahlström
2017-04-23 10:16 ` Andreas Klauer [this message]
2017-04-23 10:23 ` Patrik Dahlström
2017-04-23 10:46 ` Andreas Klauer
2017-04-23 11:12 ` Patrik Dahlström
2017-04-23 11:36 ` Wols Lists
2017-04-23 11:47 ` Patrik Dahlström
2017-04-23 11:53 ` Reindl Harald
2017-04-23 11:58 ` Roman Mamedov
2017-04-23 12:11 ` Wols Lists
2017-04-23 12:15 ` Patrik Dahlström
2017-04-24 21:04 ` Phil Turmel
2017-04-24 21:56 ` Patrik Dahlström
2017-04-24 23:35 ` Phil Turmel
2017-04-23 13:16 ` Andreas Klauer
2017-04-23 13:49 ` Patrik Dahlström
2017-04-23 14:36 ` Andreas Klauer
2017-04-23 14:45 ` Patrik Dahlström
2017-04-23 12:32 ` Patrik Dahlström
2017-04-23 12:45 ` Andreas Klauer
2017-04-23 12:57 ` Patrik Dahlström
2017-04-23 14:06 ` Brad Campbell
2017-04-23 14:09 ` Patrik Dahlström
2017-04-23 14:20 ` Patrik Dahlström
2017-04-23 14:25 ` Brad Campbell
2017-04-23 14:48 ` Andreas Klauer
2017-04-23 15:11 ` Patrik Dahlström
2017-04-23 15:24 ` Patrik Dahlström
2017-04-23 15:42 ` Andreas Klauer
2017-04-23 16:29 ` Patrik Dahlström
2017-04-23 19:21 ` Patrik Dahlström
2017-04-24 2:09 ` Brad Campbell
2017-04-24 7:34 ` Patrik Dahlström
2017-04-24 11:04 ` Andreas Klauer
2017-04-24 12:13 ` Patrik Dahlström
2017-04-24 12:37 ` Andreas Klauer
2017-04-24 12:54 ` Patrik Dahlström
2017-04-24 13:39 ` Andreas Klauer
2017-04-24 14:05 ` Patrik Dahlström
2017-04-24 14:21 ` Andreas Klauer
2017-04-24 16:00 ` Patrik Dahlström
2017-04-24 23:00 ` Patrik Dahlström
2017-04-25 0:16 ` Andreas Klauer
2017-04-25 8:44 ` Patrik Dahlström
2017-04-25 9:01 ` Andreas Klauer
2017-04-25 10:40 ` Patrik Dahlström
2017-04-25 10:51 ` Patrik Dahlström
2017-04-25 11:08 ` Andreas Klauer
2017-04-25 11:37 ` Patrik Dahlström
2017-04-25 12:41 ` Andreas Klauer
2017-04-25 18:22 ` Wols Lists
2017-04-27 19:57 ` Patrik Dahlström
2017-04-27 23:12 ` Andreas Klauer
2017-04-28 7:11 ` Patrik Dahlström
2017-04-28 9:52 ` Andreas Klauer
2017-04-28 10:31 ` Patrik Dahlström
2017-04-28 11:39 ` Andreas Klauer
2017-04-28 22:46 ` Patrik Dahlström
2017-04-29 9:56 ` Andreas Klauer
2017-05-02 13:08 ` Patrik Dahlström
2017-05-02 13:11 ` Brad Campbell
2017-05-02 15:49 ` Anthony Youngman
2017-04-25 23:01 ` Patrik Dahlström
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