Boot sector usually refers to the first sector of hard disk.
Its used for loading and transferring processor control right to operating system.
This record takes up 512 bytes.
The content ofMBRis written into the certain sector by partitioning software when it partitions.
MBR doesnt belong to any operating system and doesnt change with the changes of operating systems.
Even MBR changes, it has common guide characteristic rather than entrains the nature of operating system.
However, it may be rewritten when you install some software with multi-boot function or LILO of LINUX.
MBR is called to be loaded into memory and to play a role first.
Then it will transfer control right to operating system inactive partition.
Master boot code includes small pieces of executing code.
When you start PC, system will firstly test hardware devices.
After the test is successful, boot loader INT 19H will be activated.
Finally MBR block will be executed.
It is the content written into the certain sector by senior format command.
DBR is the block loaded by hard disk MBR.
Whats Included in DBR
DBR content is uncertain in addition to ending mark.
And there is backup in the last sector of this partition.
NTFS partition boot sector also completes booting and defining partition parameters.
It can be normally accessed when system records, such as $MFT, in MFT, are normal.
BPB and extending BPB domain of NTFS volumes:
