Systems and methods for recording optical information

A system for performing a recording or reproducing operation on an optical disc, wherein the optical disc comprises a spiral formed of alternating land and groove revolutions, and each land or groove revolution comprises a plurality of sectors, comprising:

• a detector detecting a physical ID (PID) from signals generated according to reflected light from the optical disc;
• and
• a controller deriving a counting value according to a clock signal, and predicting a switch point between a land revolution and a groove revolution according to the counting value.

A method for recording or reproducing operation on an optical disc, the optical disc comprises a spiral formed of alternating land and groove revolutions, each land or groove revolution comprises a plurality of sectors, the method comprising:

• providing a physical ID (PID) specifying a serial number of a sector;
• and
• predicting a switch point between a land revolution and a groove revolution according to a counting result.