Re: Zpool with latest feature com.delpfix:head_errlog can not be booted from.

I’ll see into it. It would be nice to have at least heads up message about such features, or zfs code does have means to block feature upgrade on boot pool.

Rgds,
Toomas


> On 20. May 2022, at 11:39, Johan Hendriks <joh.hendriks@gmail.com> wrote:
> 
> I did upgrade my FreeBSD Current and with that i updated my storage pool and my zroot pool.
> I did add the new gptboot code on the disk. After the reboot i can not boot anymore.
> 
> So i did reinstall the os on one disk of the old zroot mirror pool and did leave the second untouched.
> 
> Then i can import the pools.
> If i boot with the latest snapshot ISO (FreeBSD-14.0-CURRENT-amd64-20220519-716fd348e01-255696-disc1.iso) i see the following when i boot.
> 
> BIOS drive A: is fd0
> BIOS drive B: is fd1
> <SNAP>
> BIOS drive K: is disk9
> ZFS: unsupported feature: com.delpfix:head_errlog
> ZFS: pool zroot is not supported
> ZFS: unsupported feature: com.delpfix:head_errlog
> ZFS: pool storage is not supported
> BIOS 624kB/2000420kB available memory
> 
> Then the OS is loaded, if i then go to the shell of the installer and do a zpool import, ik can import the pool zroot and storage. So this snapshot has the latest ZFS version with the com.delpfix:head_errlog feature. So it looks like the bootloader is not able to use the new feature and thus renders your system unbootable.
> 
> regards
> Johan
> 
>