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Master Boot Record

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The Master Boot Record (or MBR) is a table that describes the partitions of a hard disk drive. The boot routine code contained within the ROM BIOS code that the CPU executes upon start-up reads the master boot record. The program does some setup and transfers the control to the operating system. Because the MBR is read almost immediately when the computer is started, many computer viruses operate by changing the code within the MBR.

The location of the master boot record is the first sector of the first physical hard disk drive.


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see also disk storage, compact disc, storage device, IDE,SCSI, ATA, hard disk drive partitioning


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