3. MBR Structure

Primary Partition(s) (up to 3)

• Active YES/NO

• Logical Drive (volume) C:

• Optional volumes D: and E:

Optional Extended Partition, aka Primary Extended Partition:

• Logical Drive D:

• Logical Drive E:...

• ...through Z: may be assigned.

Each Logical Drive (volume),
such as C:, contains^(*)

• OS Boot sector (program)

• FAT

• Root directory

• Files and Subdirectories

______________________

^(*) Logical drive is not part of the MBR.