Patent ID: 7382559

Claim:
A storage medium device, comprising: a storage medium having a system area for storing device specific information; a head for either reading or writing data on a track of a storage medium; an actuator for positioning said head on a desired track of said storage medium; a memory for storing at least one of alternative device specific information, and device specific information indicating device status updated according to an operation of the device; and a control unit for receiving a command from a host, controlling said actuator referring to the device specific information of said memory, and executing either read or write of data on said desired track by said head, wherein said control unit positions said head on a system area of said storage medium when power is turned ON, reads said device specific information stored in said system area and develops said device specific information onto said memory, and reads said alternate device specific information stored in said storage medium and develops said alternate device specific information on said memory when detecting read error of said device specific information from the system area, and wherein said alternate device specific information indicates an initial device status before an updating according to the operation of the device.