Translations:Handbook:AMD64/Blocks/Disks/14/en

The GPT (GUID Partition table) setup uses 64-bit identifiers for the partitions. The location in which it stores the partition information is also much bigger than the 512 bytes of an MBR, and there is no limit on the amount of partitions. Also the size of a partition is bounded by a much greater limit (almost 8 ZB - yes, zettabytes).