Hi, I'm hoping to get some help with mounting my btrfs array which quit working yesterday. My array was in the middle of a balance, about 50% remaining, when it hit an error and remounted itself read-only [1]. btrfs fi show output [2], btrfs df output [3].
I unmounted the array, and when I tried to mount it again, it locked up the whole system so even alt+sysrq would not work. I rebooted, tried to mount again, same lockup. This was all kernel 4.5.7. I rebooted to kernel 4.4.0, tried to mount, crashed again, this time a message appeared on the screen and I took a picture [4]. I rebooted into an arch live system with kernel 4.7.2, tried to mount again, got some dmesg output before it crashed [5] and took a picture when it crashed [6], says in part 'BUG: unable to handle kernel NULL pointer dereference at 00000000000001f0'. Is there anything I can do to get this in a working state again or perhaps even recover some data? Thanks much for any help [1]: https://www.moparisthebest.com/btrfs/initial_crash.txt [2]: https://www.moparisthebest.com/btrfs/btrfsfishow.txt [3]: https://www.moparisthebest.com/btrfs/btrfsdf.txt [4]: https://www.moparisthebest.com/btrfsoops.jpg [5]: https://www.moparisthebest.com/btrfs/dmsgprecrash.txt [6]: https://www.moparisthebest.com/btrfsnulldereference.jpg -- 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
