Bootsektors
Bootsektors are the initial sectors on a bootable data storage device that contain the bootstrap program responsible for starting an operating system. In technical discussions, the term is used to describe the low-level code executed by firmware during power-on or reset, with the primary role of loading the operating system into memory. While the exact contents vary by filesystem and platform, bootsektors share the function of transitioning from firmware control to the OS proper.
On traditional BIOS-based PC systems, the first 512-byte boot sector, often called the master boot sector, contains
With the advent of GUID Partition Table (GPT) and the UEFI firmware interface, the role of a
Bootsektors are a notable security concern because compromised boot code can subvert the entire system. Protective
See also: boot sector, Master Boot Record, Volume Boot Record, GRUB, UEFI, Secure Boot.