Re: gptzfsboot can't boot from 4TB SSD

From: Andriy Gapon <>
Date: Sat, 29 Jan 2022 22:43:30 UTC
On 29/01/2022 23:49, Ulrich Spörlein wrote:
> This output is from_before_  loader is loaded

What gives you confidence in that?
Do you know exact moment where execution passes from gpt(zfs)boot to loader?

> and I don't have any
> mountfrom settings in loader.conf anyway.

And they wouldn't affect gpt(zfs)boot or loader anyway.
Those settings are for kernel.

> ISorry, I wasn't clear, but the system boots just fine, it finds the
> loader, loader finds the kernel, and after I added a root
> entry in /etc/fstab, the kernel was also mounting the right root partition.
> So everything is working, but boot0 still seems to find gptzfsloader
> and then seems to fall back to loading from UFS?

So, given what you wrote below this is plain impossible?

> I inspected the start of the disk with xxd and it indeed looks like
> gptloader is embedded near the beginning, and not gptzfsloader.

The only explanation I have is that those ZFS error messages come from loader.
AFAIK, at preset we do not have loader vs zfsloader distinction, there is a 
single unified loader with ZFS support.
So, the loader is able to detect and tries to probe the pool.  And fails.

Andriy Gapon