ZFS Datasets no longer mount

[nitrobass24]

So i recently upgraded from Ubuntu 21.04 to 21.10 and now my ZFS datasets wont mount.

I have tried exporting the pool and re-importing the pool, but even trying it with the Forced options continue to fail.

root@daviserver:~# zfs mount -af
cannot mount 'ssdpool/sftpsync': Insufficient privileges
cannot mount 'ssdpool/sftpsync': Insufficient privileges
cannot mount 'ssdpool/docker': mount failed

syslog shows the following, but im not sure what it means.

Oct 17 13:19:21 daviserver kernel: [62900.992374] VFS: "mand" mount option not supported
Oct 17 13:19:21 daviserver kernel: [64689.402851] VFS: "mand" mount option not supported
Oct 17 13:19:21 daviserver kernel: [64689.402930] VFS: "mand" mount option not supported

 

[dswartz]

what does 'zfs get all' on one of the datasets show?

 

[Dlizzz]

Hi,

This happens with ubuntu 21.10 if you have the "nbmand" (non-blocking mandatory locks) property set to "on" for your dataset. Set it to "off" and you'll be able to mount your dataset again. "nbmand" is needed if you share your dataset with Samba and NFS at the same time.