3TB storage drive showing up as 2

I recently built a new system with Win7 Home Premium on an OCZ Vertex 4 and a Seagate Barracuda 3TB Storage drive. When I go into start-computer-manage-disk management, there is about 1TB of unallocated space that I can't merge with the rest of the drive for some reason. The "extend volume" option is whited out on the usable part of the drive. Is this just a fixable gimmick, or is my drive bad?
9 answers Last reply Best Answer
More about storage drive showing
  1. update your BIOS and use GPT not MBR
  2. The first thing I did when I turned it on for the first time is update the bios from a flash drive.
  3. Its an MBR issue. The max addressable partition size is 2tb.
  4. So what should I do?
  5. right click on on computer on the start menu
    click on Manage
    click disk management on the right side
    you will see on the right side in grey disk 1, disk 2, disk 3 etc
    right click on whatever disk # it is
    Click Conver to GPT Disk
  6. That option is faded out
  7. Best answer
    You can only convert if you delete the existing partition. Empty it by copying anything in it to you other drive and then delete the partition. Then you will have the option to convert it to GPT
  8. Best answer selected by ChilledGrease.
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