[PVE-User] ZFS Upgrade...

Marco Gaiarin gaio at lilliput.linux.it
Tue Sep 30 18:37:44 CEST 2025


Mandi! Alwin Antreich via pve-user
  In chel di` si favelave...

>>So, implicitly you confirm that it is GRUB that have some incompatibilities,
>>not GRUB in legacy mode... I've understood well?
> To my understanding, yes. Historically grub didn't (or still doesn't) support all features of a zfs pool on root. That's why the installer selects grub or systemd-boot [0] depending on system.

So, practically:

1) if i use systemd-boot i'm safe and i can safely upgrade boot zpool

2) if i use GRUB, both in:
   2a) legacy
 or
   2b) UEFI
 mode, i'm in danger and if i upgrade boot pool, system get unbootable.


Clearly, if i have a system taht boot in UEFI GRUB, i can upgrade bootloader
to systemd-boot (How?).


Correct? Thanks.

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