Using the mSATA port for regular harddrivestuff

So, um, yes. Have an incoming laptop that will have an msata port as well as hdd bays. From what I've read on an internets, it sounds like the msata port is used for basiically caching the OS and little else, providing read/write rates roughly equal to sata2. .. Now, this won't be of any use to me, as I'll just have the os on a primary sata3 ssd. So, that leaves us with an unused port.And if there's an unoccupied port, I want to stick stuff in it.

The question, thus, is this (and it's a twofolder to boot): a) can I use the thingie that I put in that msata port as just a general storage drive (like I would a regular hdd/ssd, for stuff and applications and etc)? b) can I rip out the circuitboard of a slightly older ssd (typical crucial m4) and use that as the "msata ssd"? I figure that the only difference between msata ssds and normal ssds is the plastic boxframe they are placed in...

So that's that. Ideas? Experience? Halp? Please?

 You need to set your mSATA as an active drive as opposed to a cache drive. Hopefully your motherboard or BIOS has an easy setting for that. Once you get it active, you can format it in Disk Management and assign it a drive letter. Thus having a secondary, and in theory bootable drive if you ever needed another OS like a linux distro.