Now, Microsoft has declared that Windows 11 only boot in UEFI, users who wish to upgrade must choose GPT disk. Learn more differences between MBR and GPT disks. GPT disk districts have a surplus of primary and backup partition tables to improve the integrity of regional data structures. In theory, users can infinitely create partitions, The limitation comes from the operating system, Windows supports up to 128 GPT partitions.Ģ. The maximum volume size supported by the GPT disk is 9.4 ZB (terabytes) and each disk can at most 128 primary partitions. The advantages of GPT diskĬompare with the MBR partition style, the GPT disk has more advantages.ġ. It enables the operating system that doesn't support booting from GPT disk to boot from the MBR partitioning and can only operate on the partitions in the MBR partition table (e.g. In addition, the operating system which can recognize the GPT partition table will check the protective MBR before it takes any operations.įor the disks which use the MBR/GPT mixture partition table, in the same part of Protective MBR, it stores a few GPT partitions (usually the first four partitions of the entire GPT partition table). This avoids the risk of accidentally deleting the partition. This part also is used for the storage of startup code for the operating systems which support GPT boot disk.ĭue to the Protective MBR, the operating system which can not recognize GPT disk will identify it as an unknown type of partition and refuses to operate on the disk, unless the user specifically requested to delete the partition. The partition style of the GPT disk is shown in the above figure. At the beginning of the GPT partition table, for safety reasons, it stores a traditional MBR partition table to prevent the disk management tool which doesn't support GPT from incorrectly recognizing GPT disk and destroying the data unexpectedly, it is called Protective MBR. Before briefly introducing some characteristics of the GPT disk, you should know that MBR and GPT are two partition tables for uses to initialize a disk before they start to partition it and install OS.
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