Which one is faster, mbr or guid?

GPT and MBR are two sets of standards for disk partition tables. There is not much difference between the two in terms of speed. The main difference is in scalability and security. However, the system installed on the GPT disk will boot faster whether it is win7 or win8.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

MBR (Main Boot Record) is located in track 0, cylinder 1 and sector 1 of the entire hard disk. However, of the total 512-byte master boot sector, the MBR only occupies 446 bytes, and the other 64 bytes are given to the DPT (Disk Partition Table) (see table), and the last two bytes are given to the DPT (Disk Partition Table) (see table). The byte "55, AA" is the end mark of the partition. This whole makes up the main boot sector of the hard disk. The master boot record contains a series of parameters for the hard disk and a boot program. The main function of the hard disk boot program is to check whether the partition table is correct and to boot the operating system on the partition with the activation flag after the system hardware completes the self-test, and transfer control to the startup program. MBR is generated by a partition program (such as Fdisk.exe). It does not depend on any operating system, and the hard disk boot program can also be changed, thereby realizing the coexistence of multiple systems.

GPT means GUID partition table. (GUID means Globally Unique Identifier). This is a new standard that is gradually replacing MBR. It and UEFI complement each other - UEFI is used to replace the old BIOS, while GPT replaces the old MBR. It’s called a “GUID Partition Table” because each partition on your drive has a globally unique identifier (GUID)—a randomly generated string that’s guaranteed to be Every GPT partition on a GPT partition is assigned a completely unique identifier.

GPT does not have the limitations of MBR. Disk drives can be much larger than the operating system and file system can support. It also supports an almost unlimited number of partitions, limited only by the operating system - Windows supports up to 128 GPT partitions, and you don't need to create extended partitions.

GPT and MBR are two sets of standards for disk partition tables. There is not much difference between the two in terms of speed. The main difference is in scalability and security. However, the system installed on the GPT disk (guid partition table format) will boot faster whether it is win7 or win8.

The difference between guid and mbr formats:

1. The security of partition tables is different. MBR means "Master Boot Record". It has its own launcher, which is the startup code. Once the startup code is damaged, the system cannot start. The system can only be started through repair. The GUID partition table comes with its own backup, and an identical partition table is saved at the beginning and end of the disk. After one copy is destroyed, it can be restored through the other copy.

2. Support different disk capacities. The MBR partition scheme cannot support disks with a capacity exceeding 2TB. That is, if a 3TB hard disk is partitioned with the MBR partition scheme, one-third of the capacity will not be recognized. Partitioning with the GUID Partition Table (GPT) scheme can recognize disks with a maximum capacity of 18EB (18X1024GB).

3. The number of partitions is different. A hard disk using the MBR partition table can only be divided into a maximum of 4 primary partition disks, while the GPT partition table type is not limited by the number of partitions. The limitation is only in the operating system - Windows supports up to 128 GPT partitions, and you don't need to create an extended partition.

4. Different partition identifiers: GUID partition, each partition can have a name (different from the volume label).

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