Patent ID: 7542223

Claim:
A magnetic disk drive comprising: a head/slider mounted to a magnetic head; a ramp on which the head/slider is unloaded; a magnetic disk on which a load/unload area and a data area are defined, each of the load/unload area and the data area including data sectors; and a controller to assign address numbers as a logical block address to each data sector in the load/unload area, the address numbers being inferior in addressing assign order to each address number of the logical block address assigned to each data sector in the data area, wherein the addressing assign order becomes inferior in ascending order of address number assignment, and the controller assigns a maximum value of all address numbers assigned to all data sectors on the magnetic disk, to a data sector in the load/unload area as the logical block address, and wherein the maximum value of the address numbers is assigned to a data track that is located on the innermost circumferential side among available data tracks defined in the load/unload area.