I appear to have this problem too. Something locked up hard, and I held the power button to turn off.
I have successfully made an archive of the entire partition since then, so I can read fine. Sometimes the system locks up and I cannot shutdown (don't know if it's related though). root@user-desktop:/# btrfsck /dev/sdb1 couldn't open because of unsupported option features (8). btrfsck: disk-io.c:683: open_ctree_fd: Assertion `!(1)' failed. Aborted And I click "I" during boot -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/748340 Title: btrfsck fails with "unsupported option features", must [ignore] to boot -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
