Master Partition Table

Definition: The master partition table, often simply called the "partition table," is one of several components of the master boot record and contains a description of the partitions on the hard disk drive, include their types and sizes.

Due to the size (64 bytes) of the master partition table, a maximum of four partitions may be defined on a hard drive. However, additional partitions may be setup by defining one of the physical partitions as an extended partition and then defining additional logical partitions within that extended partition.

 

Also Known As: MPT, partition table, partition map

Examples: "Thanks to the small size of the master partition table, I can only setup four real partitions on my new hard drive."