Seccandary 300gig sata drive information lost?

Hi i’ve built a computer a wile ago to use for file storage, recently i updated the cpu and mother board. This computer has 3 Hdd’s in it an 80gig samsung drive as master on ide cabel which has the os on it, a 200gig WD as slave on the same ide cable and a 320gig Wd sata drive on sata 1 as ide. Here’s the problem, all the information from the 80 gig drive and the 200 gig drive are there and working mostly movies and music. but i cant acces the information on the 320gig sata drive windows says that it needs to be formated. I dont want to format it becasue it has my HD movie colection on it. any ideas on how to get windows to reconise the files?