Hi I have a WD black 1T hard drive from 3 years ago. I use to have 2 of them in raid 5 config. I tried to reformat one of them and I was successful. But somehow the other two is showing up as 2T. Tried using different computers, USB3, USB2, 3.0Sata cable, 6.0 Sata cable all is not working under window 7 enterprise version 64bit. Again in bios it looks fine. Thanks.