Information recording and reproducing apparatus, program for controlling same, computer-readable storage medium, method for controlling information recording and reproducing apparatus, and information storage medium

(canceled)

A method for controlling an information recording and reproducing apparatus that records and reproduces information in/from an information storage medium having a plurality of information storage layers of two or more different types, the method comprising the steps of:

• determining an accessed information storage layer, which is an information storage layer that is accessed among the plurality of information storage layers;
• and
• identifying a type of the accessed information storage layer determined in the step of determining the accessed information storage layer.

An information storage medium having a plurality of information storage layers of two or more different types, wherein each information storage layer stores therein layer number information discriminating the information storage layer from the rest of the plurality of information storage layers, and at least one of the information storage layers stores, in a management information region thereof, layer type information indicating types of the respective plurality of information storage layers.