share hard drive mapping

alright i have a computer in my basement that im using basically as a file server but i use it for other things too now my problem is this computer has 16 scis hdd's connected to it i want to share them over my home network but i want 6 of them password protected so that you can only view the hard drives with a passwork while the other 10 are not password protected so the users of my network can save their files on the network
so does anybody have any idea how to password protect only some of the shared hdd's any software or anything like that thanks any help would be appreciated