mounting from zfs:zroot/ROOT/default failed with error 45

Mike Tancsa mike at
Fri Apr 5 19:38:05 UTC 2019

On 4/5/2019 9:43 AM, Mike Tancsa wrote:
> On 4/5/2019 9:00 AM, Mike Tancsa wrote:
>> I have a couple of ZFS boxes I want to upgrade from RELENG_10 to
>> RELENG_11 and before doing it, I wanted to clone them into a VM to test
>> out the upgrades. In the past, this was easy enough using actual
>> hardware. However, I cant seem to get it going in a VM. I tried doing
>> the following steps
> Actually, I wonder if the issue is that I am doing the zpool create on a
> RELENG_12 box.... So when I try and boot that zpool that was freshly
> created on RELENG_12 with a RELENG_10 kernel, I am running into issues.

It does seem to be a zfs version issue which kinda makes sense. If I
create the zfs image on a RELENG10 vm it works.  The only issue is that
its quite slow to do on the VM as its a LOT of disk IO.  Is there a way
to create an older version of a zfs file system on a newer version of
FreeBSD so I can get the best of both worlds ?


Mike Tancsa, tel +1 519 651 3400 x203
Sentex Communications, mike at
Providing Internet services since 1994
Cambridge, Ontario Canada   

More information about the freebsd-questions mailing list