Proxmox 8.1 - ZFS Pool Upgrade - zpool-features(7)

[MrBrown]

Hi there,

After updating to Proxmox 8.1.3, all my ZFS pools display the following message:

Some supported and requested features are not enabled on the pool. The pool can still be used, but some features are unavailable.

Enable all features using 'zpool upgrade'. Once this is done, the pool may no longer be accessible by software that does not support the features. See zpool-features(7) for details.

I've read about past issues with upgrading ZFS pools on rpool using GRUB on a legacy BIOS boot system. Are there any potential risks with this version, or can I safely upgrade all my ZFS pools? My system is still a legacy system:

root@pve:~# proxmox-boot-tool status
Re-executing '/usr/sbin/proxmox-boot-tool' in new private mount namespace..
System currently booted with legacy bios
470D-341E is configured with: grub (versions: 6.2.16-19-pve, 6.5.11-4-pve)
DE92-A66D is configured with: grub (versions: 6.2.16-19-pve, 6.5.11-4-pve)

root@pve:~# lsblk -o +FSTYPE
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS FSTYPE
sda           8:0    0 447.1G  0 disk             
├─sda1        8:1    0  1007K  0 part             
├─sda2        8:2    0   512M  0 part             vfat
└─sda3        8:3    0   238G  0 part             zfs_member
sdb           8:16   0 238.5G  0 disk             
├─sdb1        8:17   0  1007K  0 part             
├─sdb2        8:18   0   512M  0 part             vfat
└─sdb3        8:19   0   238G  0 part             zfs_member
sdc           8:32   0 465.8G  0 disk             
└─sdc1        8:33   0 465.8G  0 part             zfs_member
sdd           8:48   0 465.8G  0 disk             
└─sdd1        8:49   0 465.8G  0 part             zfs_member
sde           8:64   0   3.6T  0 disk             
├─sde1        8:65   0   3.6T  0 part             zfs_member
└─sde9        8:73   0    64M  0 part             
sdf           8:80   0   3.6T  0 disk             
├─sdf1        8:81   0   3.6T  0 part             zfs_member
└─sdf9        8:89   0    64M  0 part             
zd0         230:0    0     4M  0 disk             
zd16        230:16   0    10G  0 disk             
├─zd16p1    230:17   0     1M  0 part             
├─zd16p2    230:18   0   1.8G  0 part             ext4
└─zd16p3    230:19   0   8.2G  0 part             LVM2_member
[...]

SDA and SDB are my rpool. I think all other pools should be fine to upgrade.

Thank you so much! Proxmox is a fantastic piece of software.