Corrupted zpool import -f FAILS state FAULTED

[Outback Dingo]

ok zfsgurus, FreeBSD 9.1-STABLE box zpool import -f reports pool status
Faulted, one of more devices contains corrupted data, however its showing
the guid as faulted in the poll, and not the actual disk device /dev/daX,
the pool is a single vdev 24 disk raidz3. Essentially the hardward platform
is a dual node system, with 8 enclosures connected to 24 SAS drives via 4
LSI cards. I am not currently using geom_multipath, but the box is zoned so
that each node can see 50% of the drives,
in case of Failure, carp kicks in and migrates "zpool import -af" the pools
onto the other node. it seems as though somehow the pool is now seeing guid
and not devices, not sure if they have switched devices ids due to a reboot.