On Mon, 2010-11-08 at 16:04 -0500, Chris Mason wrote: > 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. No luck yet :) # ./btrfsck -s 1 /dev/sdc1 using SB copy 1, bytenr 67108864 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 Segmentation fault # ./btrfsck -s 0 /dev/sdc1 using SB copy 0, bytenr 65536 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 Segmentation fault # ./btrfsck -s 2 /dev/sdc1 using SB copy 2, bytenr 274877906944 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 Segmentation fault # ./btrfsck -s 3 /dev/sdc1 using SB copy 3, bytenr 1125899906842624 No valid Btrfs found on /dev/sdc1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
