Patent ID: 7672205

Claim:
A method for variably controlling a data read speed in an optical disc drive for a first optical disc, the optical disc drive being controlled by a control command set including a read command and additional information associated with the read command, the method comprising: determining whether or not the read command has been received, the read command and the additional information respectively being a command and information for copying data recorded on the first optical disc to a second optical disc, the additional information including type information of the first optical disc and size information of the data to be copied from the first optical disc to the second optical disc; if the determining step determines that the read command has been received, examining the additional information; and variably controlling the data read speed according to the type information of the first optical disc and the size information of the data to be copied from the first optical disc, wherein the read command and the additional information are received from a personal computer equipped with both the disc drive for driving the first optical disc and another disc device for driving the second optical disc, and wherein the step of variably controlling the data read speed comprises: determining whether the type information is 101b; if the type information is not 101b, determining whether the type information is 000b; if the type information is 000b, determining whether the size information is equal to or less than a 1-block value; and if the size information is larger than a 1-block value, controlling the data read speed of the first optical disc to be a maximum data read speed.