Abstract: The present invention provides an optical disc drive and a method for changing a mode in the same. In an embodiment of the present invention, it can be determined whether to change a mode of the optical disc drive based on a command sent from a host connected through an interface. If a predetermined command is sent from the host within a predetermined time after the optical disc drive is newly connected to the host or power is supplied to the optical disc drive while the optical disc drive is already connected to the host, the mode may be switched into a first mode of connecting to a computer, and otherwise the mode may be switched into a second mode of connecting to a host with a function of playing data of a medium connected through the interface. Accordingly, the optical disc drive can automatically change its operation mode.

Abstract: The present invention provides a method for sending data in an optical disc drive capable of changing mode. In one embodiment of the present invention, if a read command is received from a host connected, whether an address included in the command indicates a file system area of a predetermined file system can be checked; and if the address included in the command is found to belong to the file system area, data converted according to the predetermined file system from file information about files recorded in an optical disc can be sent to the host.