Internal Hard drive

I just purchased a 3TB Seagate internal Hard drive. I have 2 Other 3TB hard drive also in the machine. The issue is that the new drive is only showing 2 TB usable and the 746 GB as unallocated. I can't extend the disk or even select dynamic disk or anything. Is there any utility that is available to help with getting the entire 3TB to be usable. I didn't have this issue with the other 3TB I have in the computer. I'm using windows server 2008 R2 x64.
Please see attached image.

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timgreen7077Exchange EngineerAsked:
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timgreen7077Exchange EngineerAuthor Commented:
I fixed the issue. Using diskpart i found that the partition was MBR instead of GPT. I converted to GPt using diskpart cmd and that fixed the issue.
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