My 3tb hdd had 3 partitions in gbt format , a 100gb boot with Windows 7, a 2.5tb for my data, and a empty100gb partition (the 2.5tb and 100gb partition sizes are estimated I can't remember exact size). I was installing archbang when I was going to partition my drive. My drives showed saying it had 800gb of free space. Thinking nothing of it I created a new 20gb partition. It gave me a choice to write to either the beginning or the end so I chose the end. Then some weird thing happen and it was giving me a bad sector error I believe. I was worried that it deleted my data on the rest of the Hdd so I try booting up windows. It gave me the repair option and the boot windows normally option. The normal boot send me back to my bios and the repair option send me back to the boot menu with the same choices . So I put in my old Hdd that had a copy of windows 7. My 3tb Hdd does not show up in Explorer. In disk management it shows up with no letter and in 2 partition plus 746gb of free space. One of 2048gb labeled Healthy (gbt protected partition) and the other as 18gb healthy (active, primary partition). When I right click the 1st partition it only gives me the option of help and the second partition gives me delete volume and help. Please help I do not want to loss my data. My system specs are 4670k, Asus z87 pro, 3tb Seagate barracuda, 8gb corsair lp 1866, and xfx 550w