GUID Partition Table
STANDARD FOR THE LAYOUT OF THE PARTITION TABLE ON A PHYSICAL STORAGE DEVICE USED IN A DESKTOP OR SERVER PC
Extended Master Boot Record; GPT Disk; GPT Partition; GUID partition table; Protective MBR; Hybrid MBR
The GUID Partition Table (GPT) is a standard for the layout of partition tables of a physical computer storage device, such as a hard disk drive or solid-state drive, using universally unique identifiers, which are also known as globally unique identifiers (GUIDs). Forming a part of the Unified Extensible Firmware Interface (UEFI) standard (Unified EFI Forum-proposed replacement for the PC BIOS), it is nevertheless also used for some BIOS systems, because of the limitations of master boot record (MBR) partition tables, which use 32 bits for logical block addressing (LBA) of traditional 512-byte disk sectors.