ZFS: unsupported ZFS version 5000 (should be 28)

[Kimmo Paasiala]

On Mon, Oct 21, 2013 at 3:21 AM, Freek Dijkstra <public at macfreek.nl> wrote:
> On 21-10-2013 00:03, Freek Dijkstra wrote:
>
>>    ZFS: unsupported ZFS version 5000 (should be 28)
>>    gptzfsboot: No ZFS pools located, can't boot
>
> [...]
>
>>   # gpart create -s gpt ada0
>>   # gpart add -b 34 -s 94 -t freebsd-boot ada0
>>   # gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
>
> I tried a full install again, and it seems that 94 blocks was too small
> for freebsd-boot. I just tried again, and things seem to work now.
>
> I am curious if this indeed was the cause.
> Is there a way to determine the required size of a bootloader?
>
> If this was indeed the cause (I need some sleep, so am not ruling
> anything out :) ), I guess it is useful to add a warning message to gpart.
>
> Regards,
> Freek
>

You can look at the size of the /boot/gptzfsboot file to see how much
space it will require. To be on the safe side you can always use a
256KB (512 blocks) partition or even larger for the boot loader. This
allows room in case the loader suddenly grows in size in later
versions.

-Kimmo