Buffer management method and optical disc drive

A storage device operative to receive a read command and write commands from a host computer, wherein the read command comprises a read destination address for designating an associated area of a storage media, wherein each of the write command comprises a data block and a write destination address for designating an associated location of the storage media, the storage device comprising:

• a memory device for buffering the data blocks of the write commands;
• a processor for processing the write commands to generate a latest list wherein the latest list comprises a plurality of buffer indexes indicating buffer areas of the memory device for storing the data blocks associated with the latest certain amount of received write commands;
• and
• a driver unit, controlled by the processor, for accessing the storage media;
• wherein the processor determines whether the read destination address of the read command is associate with the latest list;
• if the determination result is positive, the processor outputs an associated data block from the buffer, and renews the latest list;
• if the determination result is negative, the processor controls the drive unit to access the storage media to acquire a read data block stored on the associated area of the storage media, the processor controls the memory device to buffer the read data block, and the process or modifies the latest list.