An answer to this question may clear up my confusion: Can the C: drive be part of a pool, having all drives (including the c: drive) look like 1 drive? If so, how do I do that? I created a storage space, but it made me set it up as drive D:, and I see no way to combine it with C:. To clarify, I'm trying to create a parity type of setup (raid 5 if you prefer to call it), and I want to have all 5 drives in the system, which would then include the boot drive, participating in that. And having done that would like it to be 1 drive letter. What I have been able to do is install Windows 10, then create a storage space pool of 4 drives, being a D: drive. This leaves the C: / Windows boot drive out of the protection scheme. Would also like to have the clarity of just 1 drive. Any fog removal is appreciated.