What to do with a corrupted ZFS rpool?

Question

I have a corrupted rpool (appearing when updating Ubuntu 20.04 to 22.04). There is another thread with this title, except it seems that in the other thread, the ZFS pool is not corrupted... What to do about a corrupted ZFS Pool

Basically, I have had troubles with my Ubuntu 22.04 with kernel 6.2.0-36, first of network hardware not recognized, and now Ubuntu is simply freezing.

I still have the older kernel from 20.04, 5.15.0-88. That one works good. Ubuntu is not freezing, and I can write you this message. :)

So I wanted to set grub to load this last one by default. I have been following this thread to do so: Set "older" kernel as default grub entry

Doing the step, and willing to update grub, with sudo update-grub, I get this error:

/usr/sbin/grub-probe: error: failed to get canonical path of `rpool/ROOT/ubuntu_yismyo'.

So after some more search, I zpool status, and I get this status:

  pool: bpool
 state: ONLINE
  scan: scrub repaired 0B in 00:00:02 with 0 errors on Sun Nov 12 00:24:03 2023
config:
NAME                                    STATE     READ WRITE CKSUM
bpool                                   ONLINE       0     0     0
  0c86e95c-1c25-624e-adf2-0428e3773eaa  ONLINE       0     0     0


errors: No known data errors
pool: rpool
 state: DEGRADED
status: One or more devices has experienced an error resulting in data
    corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
    entire pool from backup.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A
  scan: scrub in progress since Sun Nov 12 00:24:01 2023
    436G scanned at 246M/s, 403G issued at 227M/s, 436G total
    88K repaired, 92.37% done, 00:02:30 to go
config:
NAME                                    STATE     READ WRITE CKSUM
rpool                                   DEGRADED     0     0     0
  f3536666-f3e7-6245-8036-46f34b68f391  DEGRADED 1.12K     4     3  too many errors  (repairing)


errors: 1115 data errors, use '-v' for a list

Please, what should I do? I am a complete newbie. I have tried to find answers, but impossible to find how to "restore the entire pool from backup", and I don't think I have any backup (I mean if Ubntu is not doing one by default, this is clear I have not done so. I don't even know what is rpool, what it is supposed to do...)

Is my only option to re-install Ubuntu 22.04 from fresh? This would not be my preferred one, I have files in some folder I would like to keep, but obviously, I can buy a 2nd external disk to keep this data away, and then format my current drive and make a fresh install.

Thanks for any help!

What to do with a corrupted ZFS rpool?

0 Answers0