After hearing many vehement requests for expanding RAID-Z vdevs, Matt Ahrens and I sat down a few weeks ago to figure out an mechanism that would work. While Sun isn''t committing resources to imlementing a solution, I''ve written up our ideas here: http://blogs.sun.com/ahl/entry/expand_o_matic_raid_z I''d encourage anyone interested in getting involved with ZFS development to take a look. Adam -- Adam Leventhal, Fishworks http://blogs.sun.com/ahl