Thursday, March 15, 2012

Master Boot Record

A master boot record (MBR) is boot sector type from IBM Personal Computer consisting of a sequence of 512 bytes that is ocated at the first sector of a data storage device like hard disk. MBR is usually placed on storage devices.

The use of MBR are :

  • As a partition table holding, which describes the partitions of a storage device. In this context the boot sector may also be called a partition sector.
  • Operating system bootstraping. The BIOS built into a PC-compatible computer loads the MBR from the storage device and passes execution to machine code instructions at the beginning of the MBR.
  • Uniquely identifying individual disk media, with a 32-bit disk signature, even though it may never be used by the operating system.

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