What is the MBR of a hard disk and what is the MBR of a computer?

MBR is the abbreviation of Master Boot Record, in the traditional hard disk partition mode, the boot sector is the first sector of each partition, and the main boot sector is the first sector of the hard disk.

In order to facilitate the computer to access the hard disk, the space on the hard disk is divided into many blocks (called sectors in English), and then an address is assigned to each block, which is called a logical block address (that is, LBA).

In MBR, the size of the partition table is fixed and can hold a total of four primary partitions. In the MBR partition table, logical block addresses are represented by 32-bit binary numbers, so a total of 2 32 (2 to the 32nd power) logical block addresses can be represented. If a sector size is 512 bytes, then the maximum partition capacity of an MBR hard drive is only 2TB.

MBR is a hard disk partition table.

There are also dues to be recorded in it.

is the 0-64 sector of the hard disk.

The data in it can be changed.

But I suggest you don't change him.

MBR Overview: The full name is Master Boot Record, that is, the master boot record of the hard disk.

The 0 cylinder, 0 head, and 1 sector of a hard drive is called the master boot sector (also called the master boot record MBR).

It consists of three parts, the main bootloader, the disk partition table (DPT), and the partition valid flag (55AA). Of the total 512 bytes of the main boot sector, the boot loader is 446 bytes, and the second part is the partition table, or DPT, which takes up 64 bytes, and the number of partitions on the hard disk and the size of each partition are noted. The third part is the magicnumber, which takes up 2 bytes and is fixed at 55AA.

MBR stands for Main Bootable Record, which records the partition information of the entire hard disk. When the hard disk is partitioned, it is saved in the active partition (usually the C area is activated). Formatting does not erase the MBR, and the original MBR is replaced with new MBR information only in the repartition.

When the MBR is corrupted due to a virus, it can sometimes be repaired with the fdisk MBR command in DOS (but it is not a panacea).

MBR: The first piece of boot on the disk.

MBR (master boot record, another term is main boot record), Chinese means main boot area record.

The first sector of the 0 track of the hard disk is called MBR, and its size is 512 bytes, and this area can be divided into three parts. The first part is the pre-boot area, which occupies 446 bytes. The second part is the partition table, which occupies 64 bytes, and the number of partitions on the hard disk and the size of each partition are recorded in it. The third part is the magicnumber, which takes up 2 bytes and is fixed at 55AA.

It does not belong to any operating system, nor can it be read by the disk operation command provided by the operating system, but it can be modified and rewritten by commands, such as in minix3, you can use the command: installboot -m dev c0d0 usr mdec masterboot to write the small program masterboot into mbr, masterboot is usually written in the huiwen language. We can also use the number 2 function of the int13h provided in the ROM-BIOS to read the contents of this sector, or we can use the software tool to read it.

Abbre [Master Boot Record] is an abbreviation.

1. MBR, that is, the master boot record.

2. When partitioning the hard disk or removable disk of a compatible machine, a boot sector at the front of the drive.

3. The MBR concept came into existence in 1983 after PC DOS supported hard disks. The MBR describes the information of a logical partition, including the file system and how it is organized.

4. The MBR also contains an executable ** or boot record (VBR) of the computer loading the operating system in the second phase of booting or connecting to each partition. This MBR** is often referred to as the bootloader.

5. The maximum addressable storage space of the MBR partition table is only 2TB (232 512 bytes). Therefore, with the advent of large hard disks, the MBR partitioning method is gradually replaced by tables. MBR cannot exist in a non-partitionable medium.

It is a one-click restore file, which is used to rebuild the MBR and rebuild the computer boot, which is the system boot (whether it is a single system or a multi-system);

The physical first hard disk is called the Master Boot Record;

That is: MBR (Main Boot Record), after modifying the MBR virus or program to move the original MBR to other sectors, especially some troublesome MBR viruses, when the MBR is forcibly used, the computer will not boot, because the normal boot and file structure of the computer are currently booted by the virus program;

Rebuilding the MBR is for this situation, and some system bugs may also cause MBR damage, the specific situation is too complicated, the landlord should rebuild the MBR will be the system to recover relatively clean.

main boot record.

To put it simply, you turn on the power, first have the BIOS program on the motherboard boot hardware initialization, and then hand it over to the system (such as XP 2000 Linux, etc.) to boot, and this bootloader of the system is in the first 512 bytes (it seems, or 1024) on the first sector of the first partition of the MBR - hard disk, and the common command is fdisk mbr can fix the win boot.

If it is in a computer, then it generally refers to the master boot record, that is, the Chinese master boot record.

It contains information such as bootstrapping, partitioning tables, etc.

Summary. The choice of MBR or GUID for an SSD depends on factors such as the model, performance, capacity, and version of the computer system.

The choice of MBR or GUID for an SSD depends on factors such as the model, performance, capacity, and version of the computer system.

Can you tell us more about that?

1. If the SSD master version is older or the hard disk read/write is slow, it is recommended to choose MBR with better compatibility. If the computer system version is Windows 8 or later, it is recommended to use the updated GUID. Note that if the hard disk capacity exceeds 2T, the only option that can be selected means [Master Boot Record], which was proposed by Zheng IBM in the early years.

It is a special boot sector that exists at the beginning of the disk drive. This sector contains information about the installed operating system and boots the system with a small segment. If you have Windows installed, its startup information is placed in this paragraph** - if the MBR information is corrupted or accidentally deleted and Windows will not boot properly, then you need to find a boot repair software tool to fix it.

In Linux, the MBR is usually a GRUB loader. mbr。When a computer boots, it will first boot the BIOS system that comes with the motherboard, the BIOS loads the MBR, and the MBR then boots Windows, which is the MBR boot process; 3. GUID means GUID partition table, that is, [globally unique identification disk partition table].

It is another more advanced and novel way of organizing disks, a way of organizing disks that are started with UEFI. At first, it was for better compatibility, and later it was widely used because of its larger support memory (MBR partition supports up to 2T disks), more compatibility, especially Apple's Mac system all uses GUID partitions. The GUID does not have the concept of partitioning, and all Zheng finger cdef disks are stored in a piece of information.

Because of compatibility issues, the GUID actually has an MBR boot at the very beginning of the boot, also known as [Protected Boot], in order to prevent the device from not supporting UEFI differentiation.

MBR: The first piece of boot on the disk.