[Josh Hurtz]

i know this is a old post, but to anybody who comes here looking for a fix, i found one, im using a z200 workstation and i just installed a HGST 6tb sata 6gb/s drive
make sure new hard drive is GPT not MBR (you can use MiniTool Partition Wizard, its simple)
install Intel Rapid Storage Technology v12.5.0.1066 (if your on windows 7 , or just download latest if your on windows 10)
restart comp ( i had to twice)
now to go control panel-administrative tools-computer management, then on left side click disk management
now find your have drive , it will be the one that is colored black and say unallocated space right click and choose new simple volume and click next, that should give you the full space of the hard drive