Ubuntu
grub2 package

  1. Bug #2041739
  2. Comment #8

Comment 8 for bug 2041739

Revision history for this message
Mathias Aerts (mathias-aerts) wrote :

These ZFS and grub issues appear to be related as well:
https://github.com/openzfs/zfs/issues/15261
https://github.com/openzfs/zfs/issues/13873
https://savannah.gnu.org/bugs/index.php?64297

I could not believe simply creating a snapshot of the top level bpool would cause this, so I was curious enough to try it again and indeed this causes grub-probe to stop recognizing /boot as being zfs. Deleting the snapshot does not help, and I had to use my repair script to fix the boot again.

Before I fixed the bpool again, I saved zpool and zfs properties for the bpool and compared them afterwards. The only differences are the following:

zpool properties:
---
broken state:
bpool feature@extensible_dataset active

working state:
bpool feature@extensible_dataset enabled

zfs properties
---
broken state:
bpool snapshots_changed di dec 19 10:57:22 2023 -
working state:
(property does not exist)

I used to have sanoid enabled to periodically create snapshots of my system, which I have now excluded bpool from to prevent this from reoccurring.