Mirrored ZFS bootable root

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So the instructions say that you are supposed to select two disks during installation to have it auto-mirror them. Unfortunately, it didn't allow me to select more than one disk (tried CTRL, Shift, mouse, keyboard, etc etc)... So, we are going to try to do it manually...

First, let's check the initial setup...
malachi@serveris:~$ zpool status
  pool: rpool
 state: ONLINE
 scrub: none requested
config:

    NAME        STATE     READ WRITE CKSUM
    rpool       ONLINE       0     0     0
      c5t0d0s0  ONLINE       0     0     0

errors: No known data errors
malachi@serveris:~$ zpool list
NAME    SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
rpool   230G  2.45G   228G     1%  ONLINE  -
malachi@serveris:~$ zfs list
NAME                                 USED  AVAIL  REFER  MOUNTPOINT
rpool                               2.44G   224G  55.5K  /rpool
rpool@install                         16K      -  55.5K  -
rpool/ROOT                          2.29G   224G    18K  /rpool/ROOT
rpool/ROOT@install                      0      -    18K  -
rpool/ROOT/opensolaris              2.29G   224G  2.23G  legacy
rpool/ROOT/opensolaris@install      58.4M      -  2.22G  -
rpool/ROOT/opensolaris/opt          3.60M   224G  3.60M  /opt
rpool/ROOT/opensolaris/opt@install      0      -  3.60M  -
rpool/export                         157M   224G    19K  /export
rpool/export@install                  15K      -    19K  -
rpool/export/home                    157M   224G   157M  /export/home
rpool/export/home@install             18K      -    21K  -

So how do we know which drives are available for mirroring? We know that c5t0d0s0 is the one we want mirrored, but....

su then format
malachi@serveris:~# format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c5t0d0
          /pci@0,0/pci1043,81fb@5/disk@0,0
       1. c5t1d0
          /pci@0,0/pci1043,81fb@5/disk@1,0
       2. c6t0d0
          /pci@0,0/pci1043,81fb@5,1/disk@0,0
       3. c6t1d0
          /pci@0,0/pci1043,81fb@5,1/disk@1,0
       4. c7t0d0
          /pci@0,0/pci1043,81fb@5,2/disk@0,0
       5. c7t1d0
          /pci@0,0/pci1043,81fb@5,2/disk@1,0
       6. c8t0d0
          /pci@7b,0/pci1043,81fb@5/disk@0,0
Specify disk (enter its number):
Specify disk (enter its number): ^C

It looks like c5t1d0 is the best choice...

malachi@serveris:~# zpool create rpool mirror c5t0d0s0 c5t1d0s0
invalid vdev specification
use '-f' to override the following errors:
/dev/dsk/c5t0d0s0 is part of active ZFS pool rpool. Please see zpool(1M).
malachi@serveris:~# 

hmmm.. yes, we knew it was... we wanted to make a copy... hmmm
malachi@serveris:~# zpool add rpool c5t1d0s0
invalid vdev specification
use '-f' to override the following errors:
/dev/dsk/c5t1d0s0 is part of exported or potentially active ZFS pool rootpool. Please see zpool(1M).


hmmm... is that from the current install or the previous install?
malachi@serveris:~# zpool attach rpool c5t0d0s0 c5t1d0s0
invalid vdev specification
use '-f' to override the following errors:
/dev/dsk/c5t1d0s0 is part of exported or potentially active ZFS pool rootpool. Please see zpool(1M).


hmmm....
malachi@serveris:~# zpool attach -f rpool c5t0d0s0 c5t1d0s0
cannot attach c5t1d0s0 to c5t0d0s0: device is too small


hmmm, I tried formatting c5t1d0s0, but it still won't attach
zpool import shows that the other drives are still set as a raidz, so this is definitely the right drive... how to get it to import?

I think I may have to start over and use the manual installer rather than the GUI installer :(