GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"

[alteriks at gmail.com]

Hi,
I'm having same problem as Radek Valášek.
I tried to install FreeBSD-8.0-RC1 on 3 GPT disks.
I did step by step 'manual' from 
http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ2
I'd like to ask if this problem could be related to setting AHCI host 
controller on?

ZFS: i/o error - all block copies unavailable
ZFS: can't read MOS
ZFS: unexpected object set type lld
ZFS: unexpected object set type lld

FreeBSD/i386 boot
Default: z:/boot/kernel/kernel
boot:
ZFS: unexpected object set type lld

FreeBSD/i386 boot
Default: tank:/boot/kernel/kernel
boot:

FreeBSD/i386 boot
Default: tank:/boot/kernel/kernel
boot: