3ware escalade 7410 or 7810 raid card

hey, ive been thinkin of getting the escalade 7410 raid card.. it seems good.. i want something that does raid 5.. and something not toooo expensive.... also, its ata100... seems like a good deal.. the thing is though, the 7410 is 4 port... unlike the 7810 which is 8 ports.. but like $100 more... my question is.. can you connect 8 harddrives to a 4 port raid card or is only one allowed per thingey.. sorry if its a dumb question =P but i cant seem to find the answer anywhere on their site... and other sites give conflicting information.. some say 4 some say 8.. very weird..