From: Andreas Klauer <Andreas.Klauer@metamorpher.de>
To: Dan Russell <dpr@aol.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Import/recover RAID6 created with SAS2108?
Date: Mon, 7 Mar 2016 22:50:26 +0100 [thread overview]
Message-ID: <20160307215026.GA8042@EIS> (raw)
In-Reply-To: <2832CD22-EADC-4BC6-A250-FE8919A92E0A@aol.com>
On Sun, Mar 06, 2016 at 04:37:42PM -0500, Dan Russell wrote:
> can md read a RAID6 created by the 2108, or would I be wasting my time?
It might be possible.
I don't use HW-RAID anywhere but if I was forced to, this would be
one of the first things to determine, how to read it with software
in case the card fails.
> I can paste or gist the output of madam -E (304 lines) if it would help.
I don't know if it would help, but paste everything you have anyhow.
Is the data encrypted? If not - search for known file type headers
(like a large jpeg or tar.gz, something larger than disks * chunksize),
then look at the data on the other disks at the same offsets
(grab a few megs of each disks), then try to deduce the layout
and structure from that.
Basically use known data to reverse-engineer the layout if you
currently know nothing about disk orders, chunk sizes, etc.
Regards
Andreas Klauer
next prev parent reply other threads:[~2016-03-07 21:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-06 21:37 Import/recover RAID6 created with SAS2108? Dan Russell
2016-03-07 21:50 ` Andreas Klauer [this message]
2016-03-09 3:20 ` Dan Russell
2016-03-09 19:27 ` Andreas Klauer
2016-03-09 20:53 ` Dan Russell
2016-03-10 7:02 ` NeilBrown
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