can i put windows on a second hard drive that is partitioned.

can i put windows on a second hard drive that is partitioned with out boot.camp deleting the second partition and making one bootcamp windows partition?

i want one partition to be OS extended journaled and one partition for windows. Or do I have to create the bootcamp partition on my main drive? . my main drive is a solid-state drive which I run OS X and it's not as big as my mechanical drive. I would like to put windows on my mechanical drive but still save a lot of the drive for my mac data. So I would like to have that drive partitioned with OS extended journaled. Whenever I run boot camp and choose that hard drive boot camp will only allow me to erase the whole hard drive and make one partition for Windows. Maybe if I put OS X also on the mechanical drive and then try? Would that work. Thank you for any information you might have. Robert