VladX

So, I could have one MBR boot partition at 250gigs (or a 2TB partition but only use 250gigs for the OS and pool the rest), one 2TB and another 1.7TB unallocated partition that drivepool could see separately and add it to the pool? This way maximizing how much I can put in the server. I've read that on servers is best to have the same type of hdds, same speed, same type, same capacity and since the rest are 4TB I assumed it was best for the possible upgrade to also be the same.

Have an old home server running WHS2012 R2, server only has room for 4 drives, I'm running out of space and would like to remove Drive #1 that is a 250gig ssd and upgrade to a 4TB hdd. After I clone the OS partition over to the 4TB drive it will have 3.7TB free, can I add that to the pool? Or will it being an MBR formatted drive not let me do that as WHS2012 won't allow boot drives to be GPT and all other drives on the pool are GPT.