From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Kichukov Subject: Re: add another disk to existing raid 0, ie grow raid 0 possible? Date: Fri, 10 Feb 2012 16:10:09 +0200 Message-ID: <4F352541.2050207@oldum.net> References: <4F212A59.1070008@oldum.net> <20120126215713.0c24db62@notabene.brown> <4F21396D.7030308@oldum.net> <20120209145054.4443a48b@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120209145054.4443a48b@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: NeilBrown Cc: =?UTF-8?B?TWF0aGlhcyBCdXLDqW4=?= , linux-raid List-Id: linux-raid.ids -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Neil, Do you think it will make sense to try to replicate using loop devices? Cheers, - -Nik On 02/09/2012 05:50 AM, NeilBrown wrote: > On Thu, 26 Jan 2012 13:30:53 +0200 Nikolay Kichukov > wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 > >> Hello Neil, > >> Here goes the details. Once again, no valuable data, just curious what has gone wrong in that case: > >> dmesg output, first I stopped md2, then assembled it again to perform the grow. >> http://pastebin.com/HkPVEKad > >> mdadm -E output: >> http://pastebin.com/pJCjvrJE > >> The system runs GNU/Debian testing with latest updates from security-testing applied. >> Kernel: 3.1.0-1-amd64 >> mdadm: 3.2.2-1 > >> Let me know should you need any further information. > > I've finally had a look at this and unfortunately cannot find the problem. > The main reason being that I cannot reproduce it. > I built the same kernel and mdadm and created a very similar array and > tried to grow it and it all went smoothly. > > In your case it didn't start the reshape at all (reshape position was zero) so > something went wrong very early. > > If you feel like trying to reproduce it again that might be helpful. > Then I would ask you to run the "mdadm --grow" command under > strace -o /tmp/foo -f mdadm --grow .... > > and send me the /tmp/foo. But I won't be surprised if you cannot reproduce. > Sad really. > > Thanks anyway, > NeilBrown -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPNSVBAAoJEDFLYVOGGjgX6b8H/28J1Ju3ccFq5awOnErcrqMP eaIwiZx6MNLObHliPdycISqjQdvEy5TcGPr5bL+WbLqkPEhe4OVkQm6mOwHoup/1 p0YuhOpsxMihkLwuZWL2bYKhd4Jg29fT4sXgjdDSYyqyuxvSowr+CI/EhuYzuuHr fiw4YDM8mCNRjhd6Z10IwbpdUujoL5hNTrmXSqHZGaCfvyxK5Bjwl9DNyXc7k9Pt seryw/hJwTIsCBnmjFZ4XlgLpKNTCIK7TPNsrAJ50UOkXRVBBeEGuUg+rIQe+07T 0bja5MAHA9YgDofvSY4HFl3EYpo6hQy69QrO0bY6gwJ9VPkYxmRwZCELiV2fQsM= =Sebf -----END PGP SIGNATURE-----