How do I clear this problem? :-)

[Nicolas Rachinsky]

* Karl Denninger <karl at denninger.net> [2013-08-04 12:19 -0500]:
> it were wiped and re-used); however, an attempt to destroy the pool
> fails because it's not mounted, and I can't find a command to clear the
> cache data that ZPOOL is using to find it.

Try exporting it.

zpool export zstore

This worked for me with 8.3

Nicolas
-- 
http://www.rachinsky.de/nicolas