RAID arrays (and vendors)

I'm looking for an external RAID array (with external controller);
either ~8 15kRPM SCSI drives or something with more SATA drives. This
will be used in a test environment and could get moved between machines,
so I'd like something with it's own RAID controller. Support for a broad
range of OSes is important.

Can anyone recommend hardware as well as vendors? Feel free to reply
off-list.
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software        http://pervasive.com        512-569-9461