From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Subject: Re: data recovery on raid5 Date: Sat, 22 Apr 2006 13:07:32 -0700 Message-ID: <444A8D04.20809@abhost.net> References: <444A7C99.80006@abhost.net> <62b0912f0604221248s653843bfx363f346c7ef31a94@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <62b0912f0604221248s653843bfx363f346c7ef31a94@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I was already terrified of screwing things up -- now I'm afraid of making things worse based on what was posted before is this a sensible thing to try? mdadm -C /dev/md0 -c 32 -n 4 -l 5 missing /dev/etherd/e0.[023] Is what I've done to the superblock size recoverable? I don't understand how mdadm --assemble would know what to do, which is why I didn't try it initially. That said, obviouly my lack of understanding isn't helping one bit. I don't think I can afford a penny per byte, but I'd happy part with hundreds of dollars to get the data back. I would really like someone with more knowledge than me to hold my hand before I continue to make things worse. help please - support@abhost.net -- Jonathan Molle Bestefich wrote: >Jonathan wrote: > > >># mdadm -C /dev/md0 -n 4 -l 5 missing /dev/etherd/e0.[023] >> >> > >I think you should have tried "mdadm --assemble --force" first, as I >proposed earlier. > >By doing the above, you have effectively replaced your version 0.9.0 >superblocks with version 0.9.2. I don't know if version 0.9.2 >superblocks are larger than 0.9.0, Neil hasn't responded to that yet. >Potentially hazardous, who knows. > >Anyway. >This is from your old superblock as described by Sam Hopkins: > > > >>/dev/etherd/: >> Chunk Size : 32K >> >> > >This is from what you've just posted: > > >>/dev/etherd/: >> Chunk Size : 64K >> >> > >If I were you, I'd recreate your superblocks now, but with the correct >chunk size (use -c). > > > >>We'll be happy to pay you for your services. >> >> > >I'll be modest and charge you a penny per byte of data recovered, ho hum. > >