okay, i have 4 500GB drives equalling 2TB. i did a RAID 5 on all 4 drives (at least i think), but now here's what i have. one macintosh HD, and one RAID volume. the mac HD seems to have full capacity, but my RAID volume only has 750GB free space. I'm guessing that i shouldn't have that mac HD and that it should have been included in the RAID configuration, but it wasn't. because if all 4 hard drives were RAID configured together, i should have 1TB capacity... am i correct? and if so, what do i need to do to get that last hard drive into the configuration? thanks everyone!