Optical storage medium processing and logic block address producing method and optical memory unit

Abstract

An optical storage medium having land tracks and groove tracks alternately formed and capable of recording and reproducing information with respect to the land tracks and the groove tracks. The optical storage medium includes a plurality of first headers respectively having first track addresses as consecutive numbers given to the land tracks, and a plurality of second headers respectively having second track addresses as consecutive numbers given to the groove tracks independently of the consecutive numbers of the land tracks.

Description

technical field [0001] The present invention relates generally to an optical storage medium having lands and grooves as recording tracks, and more particularly to a method for numbering track addresses on an optical storage medium. Background technique [0002] Optical discs are generally classified into read-only optical discs such as CD-ROMs, write-once optical discs that allow recording once, and rewritable optical discs such as magneto-optical discs and phase-change type discs. Such an optical disk has been attracting attention as a storage medium which is at the heart of the recent rapid development of multimedia. Helical grooves or concentric grooves for directing a laser beam onto the optical disc are formed on the substrate of the optical disc. The flat portion formed between any adjacent portions of a helical groove or between any adjacent grooves of a concentric groove is called a land. [0003] In conventional ordinary optical discs, lands or grooves are used as...

AI Technical Summary

Problems solved by technology

Thus, in the above conventional land / groove recording type optical storage medium in which the land track and the groove track are alternately given the track address (number), it is necessary to follow the change between the land track and the groove track To change the timing of recording / reproducing conditions and servo conditions, causing access delays

[0008] Also, since the operation speed of the CPU in the latest computer has been increased, in the case of using the land / groove recording type optical storage medium using the conventional numbering method for the track address as described above, the processing response in the optical disc drive Access from the OS, etc. may be late, and there is a possibility that the OS may hang due to a timeout

Also, the conversion of LBAs to track addresses and sector addresses may be complicated depending on the allocation method for LBAs, causing an increase in alternate processing time or erroneous conversions, resulting in an increase in the amount of storage used in the optical disc drive

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