Rotary access port for automated tape library

A method for controlling access to a stationary tape retainer mechanism positioned within an access opening in an automated tape cartridge library housing for allowing insertion and removal of tape cartridges from the library, said method comprising:

• positioning a door to rotate about the stationary cartridge retainer mechanism, the door comprising an opening in the surface thereof to allow operator loading and unloading of a tape cartridge from the stationary cartridge retainer when the door is rotated to an open position, and library access to the stationary cartridge retainer when the shell is rotated to a closed position;
• selectively operating the door to rotate to either a closed position which allows a robotic mechanism within the library housing access to the tape retainer mechanism, or an open position which provides a barrier between the access opening and the inside of the library housing;
• and
• dimensioning the door and door opening relative to the cartridge access opening such that a portion of the door is always positioned between an operator side of the access port and the inside of the tape library irrespective of whether the door is in the open or closed position.