Definition of Guid partition table
The GUID partition table, like MBR, It also called GPT. It generates and arranges hard drive partitions. GPT uses UEFI firmware rather than the BIOS used in MBR, and it retains disc information like partitions, sizes and other essential data in sector one much like MBR. The GUID partition table(GPT) was created on the basis of the unified extensible firmware interface(UEFI) specification and is frequently used in conjunction with BIOS replacement. GPT eliminates various constraints of the master boot record(MBR) technology, notably the 2.2 terabyte partition size limit(TB).