Patent ID: 7660976

Claim:
An electronic apparatus comprising: a media reader operative to read data recorded in a removable recording medium; a media controller operative to control the reading of data from the recording medium by the media reader, and acquire initial data by using a recording medium for ensuring proper reading of data from the recording medium; a memory operative to store the initial data thus read; a central processing unit operative to carry out a process including execution of a program and computation and to control the whole apparatus; and an exchange determination unit operative to monitor whether the recording medium is exchanged, wherein the exchange determination unit starts monitoring whether the recording medium is exchanged upon a shift to a power saving mode, in which the power supply to both the central processing unit and the media controller is discontinued, from a normal mode, in which power is supplied to both the media controller and the central processing unit, the central processing unit starts monitoring whether the recording medium is exchanged upon a shift to a disk drive non-use mode, in which the power supply to the central processing unit is maintained and the power supply to the media controller is discontinued, from the normal mode, the memory is configured to retain the stored initial data in any of the normal mode, power saving mode, and the disk drive non-use mode, and the media controller reads, upon a return from the power saving mode to the normal mode, data from the recording medium by using the initial data stored in the memory if the result of monitoring by the exchange determination unit indicates that the recording medium is not exchanged, and reads, upon a return from the disk drive non-use mode to the normal mode, data from the recording medium by using the initial data stored in the memory if the result of monitoring by the central processing unit indicates that the recording medium is not exchanged.