Patent ID: 6839311
Filing Date: 2005-01-04
Classification: G11B

Abstract:
1. An information recording unit comprising: a memory for firstly storing data, a record medium for intermittently recording the stored data in said memory, a record device for recording the data on said record medium, a valid-data decision device for determining whether the recorded data is valid, wherein said record device records the data in at least two different areas on said record medium, and said valid-data decision device determines one valid data among the recorded data of the different areas, a vibration detection device for detecting a vibration applied to the unit, a first storage device for storing a first flag indicating the occurrence of a vibration in relation to a predetermined address when said vibration detection device has detected a vibration during a data recording operation at the predetermined address, and a second storage for storing a second flag in relation to another predetermined address so as to indicate that said valid-data decision device has determined that desired data is not recorded at the another predetermined address on said record medium, wherein said valid-data decision device determines whether the data is valid according to said flags stored by said first and second storage devices.