From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?TWljaGHFgiBTYXdpY3o=?= Subject: Re: Help with data recovery - RAID6 with 2 failed drives and another with broken sectors Date: Tue, 01 Oct 2013 21:24:08 +0200 Message-ID: <524B2158.2020900@sawicz.net> References: <524A07DC.1040002@sawicz.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="9Vl4p42jDVDE1iBpkBIp0aOrH2Lvxl0ET" Return-path: In-Reply-To: <524A07DC.1040002@sawicz.net> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --9Vl4p42jDVDE1iBpkBIp0aOrH2Lvxl0ET Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 01.10.2013 01:23, Micha=C5=82 Sawicz wrote: > So the nightmare came for me - I've a 7x2TB setup under RAID6, and one > of the drives started showing uncorrectable sectors a few days ago, but= > I didn't yet have time to address that. I had two-disk redundancy, afte= r > all... >=20 > Soon thereafter the cables / controller spew a slew of errors and the > array was stopped. A --force --assemble later it was back up, rebuildin= g > onto 2 spares - I was left with no redundancy. If only the bad sectors > drive was one of those two, everything would be fine. Unfortunately > that's not the case, so I'm now left with an array with read errors. So= > it fails during rebuild due to those. >=20 > What I'd like to do first is to make sure the array rebuilds onto the 6= > healthy drives, regardless of the bad blocks, I can probably recover th= e > data (assuming I can find out which files were affected - any > pointers?), but if the array doesn't rebuild correctly, I'm afraid it's= > gonna get worse, and soon. OK, so a ddrescue and --zero-superblock later my array is rebuilding onto one healthy spare. According to ddrescue I only lost some 8kB of data in more or less one chunk, so after the array is rebuilt my next task will be finding which file(s) that was. --=20 Micha=C5=82 (Saviq) Sawicz --9Vl4p42jDVDE1iBpkBIp0aOrH2Lvxl0ET Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSSyFYAAoJEGnv7NPGHSZFPWUQANnvGIW+uap3xhZQPcS9oOhU qeV8nu71CqE5Q2WaSk/EMDnHg5NPANGBfaCT65+XIOlUK2LWut00GOZ02n29gy93 tkaHCcUuETQB+fC4j9QCF/fe5RcET6eLoze0N+qTi2Md2lbezMY2kwAJyDKMdKrb 23UIoobIZ2ERGraAGIuVfcXKsXQxGDqt0+t44FhHHU6XB47pQzb5pJCUozf6T2NJ /XKWRQs28PkNfHhC4fPhPgMIxHk6JM/R2YddG0P1PCTkOKZb7se26TK3v4YM9Lho R8R8QUBfjTnyzQz7Ht9GHHVYrYdm3JNP0vNpJdwsHma7Ka0gOZk7SoSfWt7XV+fR HfmbhKhoVbLjwwMEyRk1fEqBMhcuaWsAXczzZlY3aEGGooMt1j9cFjJANBrV55In GF75YSxUtEUJtB7JgAY374QYKwryr41urZHSbleHMNfLtveaj54pxgBNvjTG9zgd khv+FH6BAMSJLMu1hI5/xqsGTKoZ40/XsBPGyByKOHQpHCfS93MjcgnHAqL16lv5 QiN9QhyhVuE6lCXbbtJ1xPFAnubSOmVmA6dPdEFog9QZbEDyLeDyVVsviS0UVL4B ZJQOkUxI8OnqxKXqapVoFseCAp5qSP4KLm2sUerL0jOlBIP4OYjuEi1HxAqXC+ko wMdA6oyk1RBth0I0Vo81 =ySAa -----END PGP SIGNATURE----- --9Vl4p42jDVDE1iBpkBIp0aOrH2Lvxl0ET--