Ubuntu won't boot after power failure - can't connect to lvmetad

Question

WARNING : Failed to connect to lvmetad. Falling back to device scanning. /dev/mapper/xubuntu--vg-root: clean. 494715/30187520 files, 4799821/120728576 blocks. You are in emergency mode...

I'm a new Linux user, and don't know what went wrong and how to fix this. (Yes, I know :ups ; it's on order) Xubuntu 17.10 installed on M. 2 NVMe with LVM; storage on RAID 1 array with LVM.

OK, learning "on the job" here. Went and did journalctl -xb and scrolled all the way down.

server04 kernel: JBD2: Invalid checksum recovering block 689 in log
server04 kernel: JBD2: Recovery failed
server04 kernel: EXT4-fs (dm-2): error loading journal
server04 systemd[1]: mnt-local-media: Mount process exited, code=exited status=32
server04 systemd[1]: Failed to mount /mnt/local/media
...
server04 systemd[1]: Received SIGRTMIN+21 from PID 1144 (plymouthd)

I tried fsck /dev/md0, got /dev/md0 is in use. Tried umount /dev/md0, got /dev/md0 is not mounted.

I edited /etc/fstab to #-out what seems to be the relevant devices: # /dev/md0 /media ext4 defaults 0 0 # /dev/media/media /mnt/local/media ext4 defaults 0 0 This lets me boot up the system, but now what?

Is there any thing that should be attached to the system as per this error Failed to mount /mnt/local/media at boot time? — George Udosen, Jul 15 '17 at 07:12
@George: the way I read it there is a checksum error in a log that pertains to /mnt/local/media, which is my raid array. I guess to bypass the error, I should change a config file to have it not mount at boot. And then I need to somehow fix the checksum error? How? — user712650, Jul 15 '17 at 11:03
My problem seems similar to link
How can I "reset the journal"? — user712650, Jul 15 '17 at 11:15

score 2 · Accepted Answer · answered Jul 16 '17 at 22:36

2

Figured out to sudo fsck /dev/media/media on the now unmounted logical volume, which found a few errors which i let it fix. After this I changed /etc/fstab back to it original and problem was solved.

answered Jul 16 '17 at 22:36

user712650

71

sudo fsck /dev/<MY-DEV> did it for me (without unmount). – Mawi12345 Jul 11 '18 at 18:30

Ubuntu won't boot after power failure - can't connect to lvmetad

1 Answers1