Re: RAID 1 to RAID 5 failure

[Roy Sigurd Karlsbakk <roy@karlsbakk.net>]

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I made a log of my testing - perhaps this'll help

Vennlig hilsen

roy
-- 
Roy Sigurd Karlsbakk
(+47) 98013356
http://blogg.karlsbakk.net/
GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt
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Hið góða skaltu í stein höggva, hið illa í snjó rita.

----- Original Message -----
> From: "Jorge Nunes" <jorgebnunes@gmail.com>
> To: "Wols Lists" <antlists@youngman.org.uk>
> Cc: "Roy Sigurd Karlsbakk" <roy@karlsbakk.net>, "Linux Raid" <linux-raid@vger.kernel.org>
> Sent: Wednesday, 6 April, 2022 22:46:10
> Subject: Re: RAID 1 to RAID 5 failure

> Hi again!
> 
> Roy: Thank you for your input. This recovery of the misaligned data
> takes a lot of time but I'm keeping this task till the end of the
> array.
> 
> Wol: Then I'll try this but someone has to guide me to do this shrink
> and try to get the initial array alignment.
> 
> Thank you both!
> Best,
> Jorge
> 
> Wols Lists <antlists@youngman.org.uk> escreveu no dia quarta,
> 6/04/2022 à(s) 20:57:
>>
>> On 05/04/2022 11:50, Jorge Nunes wrote:
>> > Hi roy.
>> >
>> > Thank you for your time.
>> >
>> > Now, I'm doing a photorec on /dev/sda and /dev/sdd and I get better
>> > results on (some) of the data recovered if I do it on top of /dev/md0.
>> > I don't care anymore about recovering the filesystem, I just want to
>> > maximize the quality of data recovered with photorec.
>>
>> Once you've recovered everything you can, if no-one else has chimed in,
>> do try shrinking it back to a 2-disk raid-5. It SHOULD restore your
>> original filesystem. You've then just got to find out where it starts -
>> what filesystem was it?
>>
>> If it's an ext4 there's probably a signature which will tell you where
>> it starts. Then somebody should be able to tell you how to mount it and
>> back it up properly ...
>>
>> I'm sure there will be clues to other file systems, ask on your distro
>> list for more information - the more people who see a request for help,
>> the more likely you are to get some.
>>
>> Cheers,
> > Wol

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