Re: ATTN: [zfs boot]: ZFS: unsupported compression algorithm 15

On 07/08/2014 10:47, Boris Samorodov wrote:
> Hi All,
> 
> Just FIY since nothing relevant was found at google.
> 
> I was upgrading my CURRENT system to rev r268233 from a one-or-two
> weeks old system. The system was created years ago and had rather
> old zfsboot code. So, after upgrading and rebooting I got the error
> right after BIOS POST...:
> -----
> "ZFS: unsupported compression algorithm 15"
> -----
> 
> ... and instant reboot.
> 
> OK, I've booted from a USB stick, run the command (the system in
> question is at /dev/ada1 and the system at USB stick is rather new
> CURRENT also):
> -----
> # gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada1
> -----
> 
> Now my system is fine again:
> -----
> % uname -a
> 
> FreeBSD bsam.int.wart.ru 11.0-CURRENT FreeBSD 11.0-CURRENT #73 r268233:
> Fri Jul  4 06:41:28 SAMT 2014
> bsam_at_bsam.int.wart.ru:/usr/obj/usr/src/sys/BB64X  amd64
> -----
> 

Did you do a 'zpool upgrade' when you updated your system? The new
features shouldn't be enabled without you having done that.

When you DO 'zpool upgrade' it specifically warns you to update the boot
code for this reason.

-- 
Allan Jude