| 摘要 |
PROBLEM TO BE SOLVED: To make efficiently accessible even a disk which is the one using both groove tracks and land tracks and where the same addresses are pre- formatted for the groove tracks and land tracks, and also to make discriminable both tracks only by the track numbers. SOLUTION: Address information is sequentially continuous addresses in each zone, and are also discontinuous at the boundary of the zones and are recorded on an optical disk so that the following address after the addresses in the preceding zone have been accessed two times repeatedly as an accessing order becomes the head address of the next zone. After the address becomes the last address in the groove track, the land track access is returned to the 1st address in the zone, and an address virtually consecutive to the last address in the groove track from the address information recorded in the groove tracks is recognized, and is sequentially executed and moves to the next zone after land track address has come to the last address in the zone.
|
