From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Mason Subject: Re: Oops while rebalancing, now unmountable. Date: Mon, 08 Nov 2010 16:04:28 -0500 Message-ID: <1289250095-sup-1814@think> References: <1289236257.3611.3.camel@mars> <1289238847-sup-3860@think> <1289248765.3611.6.camel@mars> Content-Type: text/plain; charset=UTF-8 Cc: linux-btrfs To: Shane Shrybman Return-path: In-reply-to: <1289248765.3611.6.camel@mars> List-ID: Excerpts from Shane Shrybman's message of 2010-11-08 15:39:25 -0500: > On Mon, 2010-11-08 at 12:55 -0500, Chris Mason wrote: > > Excerpts from Shane Shrybman's message of 2010-11-08 12:10:57 -0500: > > > Hi, > > > > > > Got an oops last week while rebalancing that seems to have left me with > > > a corrupted btrfs. Kernel was ~2.6.36 + Transparent hugetlb patchset + > > > small misc. patchs. > > > > Have you tried the 2.6.36 + the btrfs unstable git tree? It may be able > > to help here. > > Ok, I have built and booted the 2.6.36 + the btrfs unstable git tree > kernel and ran btrfsck with the same results. > > # btrfsck /dev/sdc1 > checksum verify failed on 625055924224 wanted C3DFFE41 found 9F99998 > checksum verify failed on 625055924224 wanted C3DFFE41 found 9F99998 > checksum verify failed on 625055924224 wanted C3DFFE41 found 9F99998 > Segmentation fault Ok, if you pull down the latest btrfs-progs from git, you'll find a new option to btrfsck, which tries alternate copies of the super block. btrfsck -s 1 /dev/sdc1 btrfsck -s 2 /dev/sdc1 btrfsck -s 3 /dev/sdc1 If we're really lucky, one of these will work. -chris