zfsboot from 8.2RC1 freeze at boot time

[Henri Hennebert]

Hello and merry Xmas to everybody,

I upgrade a remote server from 8.1-RELEASE to 8.2-RC1.

This server have one disk:

[root at tignes ~]# gpart show
=>       63  488397105  ada0  MBR  (233G)
          63   12583809     1  freebsd  (6.0G)
    12583872  475813296     2  freebsd  [active]  (227G)

=>       0  12583809  ada0s1  BSD  (6.0G)
          0   8388608       1  freebsd-ufs  (4.0G)
    8388608   4195201       2  freebsd-swap  (2.0G)

=>        0  475813296  ada0s2  BSD  (227G)
           0  475813296       1  freebsd-zfs  (227G)


It boot with zfsboot from ada0s2 containing a zfs pool.

After upgrading the zfsboot just to be able to upgrade the pool to v15, 
the server don't boot anymore.

It is a remote server, so I reproduce this config under VirtualBox. The 
boot freeze after zfsboot displaying "-".

I grab a old zfsboot from another server running 8.1-STABLE (r213582) 
which boot fine.

I put the zfsboot from r213582 (zpool v15 aware) on ada0s2 and bingo, 
the server boot normally.

Henri