Abstract: A hard disk recording apparatus including: a receiving unit for receiving programs; a reservation data receiving unit for accepting input of reservation recording data including reservation recording starting time; a reservation data storing unit for storing the reservation recording data; a recording unit for recording the programs on a hard disk based on the reservation recording data, and having a self-diagnosis function for detecting the presence or absence of abnormalities of the hard disk; and a control unit for executing the self-diagnosis if the main body is in the standby state and there is a spare time a spare time more than a time required for the self-diagnosis by a next reservation recording starting time, and not executing the self-diagnosis if the main body is not in the standby state or there is not a spare time more than a time required for the self-diagnosis.

Abstract: In a time shift playback operation a read position and a write position are located in a time shift region and when a user changes the time shift reproduction operation to a recording operation the time shift region has a read position associated sector through a write position associated sector having their respective attributes altered into a recording region and in response a recording region has a partial region having an attribute altered into a time shift region. A region having an attribute altered from a recording region into a time shift region has the same size as a region having an attribute altered from a time shift region into a recording region.

Abstract: A hard disk recording apparatus including: a receiving unit for receiving programs; a reservation data receiving unit for accepting input of reservation recording data including reservation recording starting time; a reservation data storing unit for storing the reservation recording data; a recording unit for recording the programs on a hard disk based on the reservation recording data, and having a self-diagnosis function for detecting the presence or absence of abnormalities of the hard disk; and a control unit for executing the self-diagnosis if the main body is in the standby state and there is a spare time a spare time more than a time required for the self-diagnosis by a next reservation recording starting time, and not executing the self-diagnosis if the main body is not in the standby state or there is not a spare time more than a time required for the self-diagnosis.

Abstract: In a time shift playback operation a read position and a write position are located in a time shift region and when a user changes the time shift reproduction operation to a recording operation the time shift region has a read position associated sector through a write position associated sector having their respective attributes altered into a recording region and in response a recording region has a partial region having an attribute altered into a time shift region. A region having an attribute altered from a recording region into a time shift region has the same size as a region having an attribute altered from a time shift region into a recording region.