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Date: Mon, 05 Feb 2018 15:23:43 +0000
From: Frank Leonhardt <frank2@fjl.co.uk>
To: freebsd-questions@freebsd.org
Subject: Re: Dualboot and ZFS
Organization: FJL Microsystems
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On 2018-01-31 08:27, Victor Sudakov wrote:
> My pool works successfully in a bhyve environment, but in VirtualBox 
> 5.0.14
> (to test the real boot sequence) I get this message from zfsboot:
> 
> zfsboot: No ZFS pools located, can't boot
> 
> However, if I boot from LiveCD, the pool is there, it's healthy and
> can be imported.
> 
> Why is it that zfsboot is not finding the pool? Is it because the pool
> has been created in /dev/ada0s1a instead of /dev/ada0s1 ?

Seems likely!

zfsboot will attempt to get a pool together from BIOS-visible disks. 
That probably means MBR but your BIOS may vary - especially one on a 
virtual environment. gptzfsboot might do better. But I'd look at the 
virtual machine BIOS configuration first.

Once you've booted (e.g. from a LiveCD), disks and slices not visible to 
the BIOS become fair game for forming a zpool.

Regards, Frank.