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I bought a hard drive with 3 TB capacity, but Windows 7 x64 only recognizes 2 terabytes of it. Is this a hardware problem?

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up vote 10 down vote accepted

If it is a system using an MBR, then it may only read 2TB partitions. If it uses GPT for the partitions, then it should read all 3 TB. I assume the case is that the hard drive was set up as an MBR disk. This is true in Linux, Macintosh and Windows

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Yes you are right @Luke. I changed My Partition Style to GPT from Disk Management. Thank You and +1 – Mohammadhassan Esfahanian Sep 22 '12 at 21:09
    
No problem :) Glad it worked out – Canadian Luke Sep 22 '12 at 21:47

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