Patent ID: 6236626
Filing Date: 2001-05-22
Classification: G11B

Abstract:
A library system for information recording media comprising:a loading-unloading unit for loading the recording media into the library system and for unloading the recording media out of the library system;a stocker for storing the recording media;a recording-playback unit for recording information on each of the recording media and for playing back each of the recording media;a transfer unit for transferring each of the recording media within the library system;a controller for controlling the loading-unloading unit, the recording-playback unit and the transfer unit;a group of control lines for connecting the controller to the loading-unloading unit, the recording-playback unit and the transfer unit;a group of maintenance lines provided separately from the group of control lines for extracting history data from the loading-unloading unit, the recording-playback unit and the transfer unit, respectively; anda maintenance interface network connected to the group of maintenance lines for output of the extracted history data.