Method and system for controlling logical unit of USB mass storage device

The invention relates to a method for controlling a logic cell of a high-capacity storage apparatus, the high-capacity storage apparatus, a high-capacity storage apparatus driver and a high-capacity storage system, wherein the high-capacity storage apparatus is connected to a master computer through a USB interface. The method comprises: responding to the addition and/or deletion of a logic unit;dynamically managing a logic unit list associated with the logic unit and generating corresponding hot plug events on the large-capacity storage apparatus; and notifying the hot plug events to the master computer. In the invention, the plug and play of the logic unit is realized through dynamically managing the logic unit and generating the corresponding hot plug events as well as notifying the events to the master computer.