The easiest way to check if a Disk uses GPT or MBR Partition would be to do it from the Disk Management window. If you are familiar with Windows Command-line interpreter then you can use either ...
You'll see an option to select one or the other when you're partitioning a hard drive or using a disk partitioning tool. Another way GPT outperforms MBR is how easy it is to recover from corruption.
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