ZFS failed after hard power off

[Piotr Paczynski]

>> For list reference, this is because Solaris doesn't understand FreeBSD's
>> slice table, so can't see the ZFS slice.
>
> assuming you didnt use gpt

The thing is I did use gpart to partition the disk, and the partition
was visible in Solaris as /dev/dsk/c4t0d0s2. It was also properly seen
and analyzed by zdb, which showed correct pool name. So for the
reference, I still don't know why it wasn't seen by import :)