ZFS - how to recover pool after power loss?

[James R. Van Artsdalen]

What is the right way to recover a pool after a power loss?

Neither "zpool import pool" nor "zpool import -f pool" seem to work for
me: I get a "no such pool available" error.
What *does* seem to work is to destroy the pool, then import the
destroyed pool.

The setup is a pool with a single vdev, a raidz of five USB disks. 
FreeBSD i386, the 7.0-CURRENT-200706-i386-disc1.iso image using that kernel.

# zpool import
no pools available to import
# zpool import pool
cannot import 'pool': no such pool available
# zpool import -f
no pools available to import
# zpool import -f pool
cannot import 'pool': no such pool available
# zpool destroy pool
# zpool import -D -f pool
#