Table of Contents
x86PC - Master Boot Record
Master Boot Record (MBR)
Volume Boot Record (VBR)
x86PC - Master Boot Record
Master Boot Record (MBR)
Some notes on MBR used in classic/legacy BIOS-based system.
first sector of a partitioned storage
also known as disk boot sector
contains a partition table (info on how the disk is partitioned)
classic MBR
446 bytes executable code
64 bytes partition entries (4 primary partitions)
2 bytes boot signature (0x55 0xAA)
modern MBR
218 bytes executable code
2 bytes (always 0x00?)
4 bytes disk timestamp
216 bytes executable code
4 bytes disk signature
2 bytes (always 0x00?)
64 bytes partition entries (4 primary partitionss)
2 bytes boot signature (0x55 0xAA)
primary job of embedded code is to boot/load Volume Boot Record (VBR)
superseeded by GUID partition table (GPT) -
Read more @ wikipedia
Read more @ wikipedia
Volume Boot Record (VBR)
first sector of a partition on a partitioned storage
also known as partition boot sector
Read more @ wikipedia