Arch Linux

MountainX

Member

Registered: 2016-02-08

Posts: 371

btrfs error unknown - root fs will not mount

I am running Arch on a system with full disk encryption and the storage is a Samsung 950 Pro NVMe drive (512 GB). It's a very new computer -- only a couple months old. (I'm only using 21 GB of the 512 available.)

Today I was using my system normally and browsing the web. Firefox stopped responding suddenly and for no apparent reason. Then plasma stopped responding. I could not log out of KDE.

I killed my user session (pkill -u me), then I tired to startx. At that point I noticed my root fs was read-only.

As a first step, I rebooted. That didn't help anything.

The root fs will not mount. Herre is the error info:

    running hook [encrypt]
    performing fsck on /dev/mapper/cryptroot
    mounting /dev/mapper/cryptroot on real root
    BTRFS error (device dm-0) in btrfs_replay_log: 2421: errno=-22 unknown (failed to recover log tree)
    BTRFS error (device dm-0): cleaner transaction attach returned -30
    BTRFS open_ctree failed
    mount: wrong fs type, bad option, bad superblock on /dev/mapper/cryptroot
    dropped into emergency shell

I typed this by hand, so minor punctuation is the messages is not exact, etc.

journalctl -p3 doesn't report anything that looks related to this.

What are my next steps?