attempting zpool xtreme_rewind - neither mount nor rewind

sh-3.2$ date
Fri 11 Oct 2013 14:45:43 BST
sh-3.2$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.8.5
BuildVersion:	12F45
sh-3.2$ uptime
14:45  up 14 mins, 3 users, load averages: 1.05 0.98 0.73
sh-3.2$ /System/Library/Filesystems/zfs.fs/Contents/Resources/bin/zpool status
no pools available
sh-3.2$ sudo /System/Library/Filesystems/zfs.fs/Contents/Resources/bin/zpool import
Password:
  pool: gjp22
    id: 13173756898033222216
 state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:

	gjp22                                        ONLINE
	  GPTE_71B8BDA2-3EBA-4B91-9E1C-2AE2B1DAAD06  ONLINE
	cache
	  GPTE_428337BD-2E39-4CCF-B02F-90DC376E3ED8

  pool: zhandy
    id: 8649809893956376149
 state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:

	zhandy                                       ONLINE
	  GPTE_A54431D5-B46F-44A9-83B4-76802A584C6E  ONLINE
sh-3.2$ sudo /System/Library/Filesystems/zfs.fs/Contents/Resources/bin/zpool import -FnX gjp22
cannot import 'gjp22': pool may be in use from other system
use '-f' to import anyway
sh-3.2$ sudo /System/Library/Filesystems/zfs.fs/Contents/Resources/bin/zpool import -fFnNX gjp22
^Cload: 0.35  cmd: zpool 676 uninterruptible 0.01u 0.05s
load: 0.35  cmd: zpool 676 uninterruptible 0.01u 0.05s
load: 0.73  cmd: zpool 676 uninterruptible 0.01u 0.05s