Break the mirror, perform the move, restart mirroring. The move doesn't break the log chain so there should be no need to re-seed the mirror. This of course all depends upon the size of the DB as that drives the downtime to move the data and log files.
- Tim Ford, SQL Server MVPhttp://www.sqlcruise.comhttp://www.thesqlagentman.com http://www.linkedin.com/in/timothyford