From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rich Rauenzahn Subject: Re: reshape from raid5 to raid6 failed -- and backup file is gone? Date: Thu, 22 Apr 2010 15:26:13 -0700 Message-ID: References: <20100423080938.5ef90287@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20100423080938.5ef90287@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > > > It is very odd that the backup file disappeared. =A0What is > =A0 /.MEDIA/tmp > ?? Not a tmpfs filesystem I hope... No, a persistent filesystem on another disk -- with no autodelete scripts or anything. Very very weird that it disappeared. I saw it before I went to bed... was about 50MB if I recall. Unless the fsck at boot removed it -- but I would imagine you make sure you fsync that file to disk before you proceed? I think ./.MEDIA is ext4. > You could hack mdadm to assemble the array even without a backup file= =2E > Get 'Grow_restart' to always return 0. > > Then most of your data should be assessible, but the could be a secti= on in > the middle which is currupt. As long as fsck can bring it back to a consistent state, I'm ok with that. But I would guess some file contents could be silently corrupt? -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html