Media library including storage media retrieval assembly

A method for moving a picker system relative to storage media within a media library, the media library including a library housing, the method comprising:

• supporting the picker system with an assembly base;
• selectively moving the assembly base relative to the library housing;
• and
• sensing if the assembly base is level relative to the library housing with a first sensor assembly.

A retrieval assembly for moving storage media within a media library, the media library including a library housing, the retrieval assembly comprising:

• a picker system that selectively engages the storage media;
• an assembly base that supports the picker system;
• a mover that is secured to the assembly base, the mover selectively moving the assembly base relative to the library housing;
• a level sensor that senses if the assembly base is level relative to the library housing;
• a home sensor that senses a home position of the mover relative to the library housing;
• and
• a control system that controls movement of the mover to position the assembly base relative to the storage media.