On Mon, Mar 11, 2013 at 11:49 PM, Harald Glatt <m...@hachre.de> wrote: > On Mon, Mar 11, 2013 at 11:44 PM, Matthew Booth <matt...@heisenbug.com> wrote: >> My laptop crashed hard earlier today. It reset immediately to a black >> screen followed by the BIOS. I have no idea why. >> >> However, it now fails to boot. I took a picture of the kernel panic >> that results from trying to mount the root filesystem: >> https://plus.google.com/107763699965053810188/posts/QZZt7GYzBZi >> >> To make things worse, btrfsck aborts with a double free, without >> fixing it. I took a picture of that, too: >> https://plus.google.com/107763699965053810188/posts/gKYqGgFhWyT >> >> As the kernel panic mentions btrfs_remove_free_space, I also tried >> mounting with clear_cache. Unfortunately it didn't dislodge anything. >> >> This is on a fully updated Fedora 18 system. I would really like to >> get this data back. If anybody could offer a suggestion I'd be very >> grateful. > If you can make a complete image backup of the drive before trying any > things to bring it back. > Try mounting with -o nospace_cache, also try -o ro and -o recovery as > well as -o recovery,ro.
I think the bug happens during log recovery, so btrfs-zero-log might get it mountable again, with the caveat of losing the most recently fsynced changes. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
