| 摘要 |
<p>A helical tape recording and reproducing system using three longitudinally oriented tracks (172, 174, 176) that are located adjacent the helical recording area (170) where the user data is recorded (and is also digitally recorded). One of them is a physical address track (174) and it is used for recording physical address data relating to the physical layout of the tape. It contains data which identifies the size and spacing of any system zones that have been defined, as well as the volume, the format used and the absolute number of each double frame that is to be recorded or which has been recorded. Another one is a logical address track (172) that contains data relating to the content of the recorded helical tracks. Each of the logical and physical address tracks has recorded segments each of which containing data corresponding to a particular pair of helical tracks. The third longitudinal track is a servo track which contains servo information for use by the tape transport servo system to control the direction and speed of movement of the recording and reproducing system during various operations.</p> |
