After 12.1->12.2 upgrade FreeBSD bhyve guest does not start anymore

[Jason Tubnor]

On Thu, 14 Jan 2021 at 18:52, Andrea Venturoli <ml at netfence.it> wrote:

>
>
> # sysctl vfs.zfs.vol.mode
> vfs.zfs.vol.mode: 1
>
> I.e. "geom"
>
> Should I change that to "dev"?
>
> While I know I can change only one volume at a time, how would this
> impact Windows VMs?


We clearly define volmode=dev on the zvol for all guests to prevent the
host geom activities taking hold of the volume.  Setting it to 'dev' will
make the host ignore it and won't cause issues when bhyve goes to use it.

This should fix the problem you are having.  Let us know how you get on.

Cheers,

Jason.