![]() ![]() In a GPT, the location information of partition tables is stored in the GPT header. In MBR hard disk, the partitioning information is stored in the master boot record. ![]() However, some operating systems like Mac OS X and Microsoft Windows can only boot from GPT partitions on the base of EFI firmware. However, this way will cause another new problem: how to perfectly divide disk partitions for devices which have large blocks.Īs of 2010, most operating systems support GPT. Here, in order to break of the limitation that MBR partition table is unable to support over 2 TB partition, some hard disk manufactures like Seagate and Western Digital upgrade their sector capacity to 4KB. (View MBR VS GPT to know their difference) It is a part of the United Extensive Firmware Interface standard ( Unified EFI Forum proposed replacement for the PC BIOS), and used to replace master boot record ( mbr) partition table which is in BIOS and uses 32 bits to save logical block address and size. GUID Partition Table ( GPT ) refers to the unique identifier partition table.
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