Thursday, March 15, 2012

MBR (MASTER BOOT RECORD)

Master Boot Record (MBR) 
Master Boot Sector is known as one of the most important sector in a PC hard drive that stores information for the boot process and loading the operating system.

MBR is a special place which leads to a hard drive, the MBR will be automatically made ​​when you first partition the hard drive. You could say MBR is the sector of the filesystem. because there is a MBR partition table that lists the partitions

MBR is a place where information about the number of partitions, partition type, the allocation of the BIOS can load the initial boot to the process of loading the operating system.

The master boot record contains the following structures: 
Master Partition Table: This small bit of code that is referred to as a table contains a complete description of the partitions that are contained on the hard disk.
Master Boot Code: The master boot record is the small bit of computer code that the BIOS loads and executes to start the boot process.

When the PC (turn on) -> processors begin processing -> here MBR task is:
- Look for the active partition to the partition table is intended for the boot process) in the partition table
- Find the first sector of the partition being active to get the boot sector of partition
- Contains a copy of boot sector of the active partition into memory
- Giving further control to the executable code in the boot sector


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