So, I just finished building my first PC and when I boot it up into the BIOS, all I see is my Optical Drive, and SSD. I do not see my Harddrive. I tried unplugging my SSD and plugging in the harddrive which then finally worked. I have a total of 8 SATA ports and it seems as if only two of them (which are the optical drive and SSD) are working. Any advice to help me solve this issue? I am using the ASUS Z87-Plus MOBO.