Patent ID: 7154824

Claim:
A storage apparatus capable of at least record or reproduction of an optical information recording medium in which ROM information is recorded by phase pits and in which RAM information is recorded on top of a recording region of the phase pits, the storage apparatus comprising: a light source for emitting a light beam; a recording information detection system for detecting reflected light of the light beam from the optical information recording medium and generating signals corresponding to ROM and RAM information; an optical intensity detection system for detecting intensity of the light beam from the light source; a driver for controlling the intensity of light beam emission of the light source; and a controller for providing via the driver a negative feedback control of the intensity of emission of the light source using ROM signal in the output of the recording information detection system when the output of the recording information detection system simultaneously contains ROM and RAM signals corresponding to ROM and RAM information, and for providing control so as to obtain read-out reproduction ROM signal from the output of the optical intensity detection system.