A tape library apparatus comprising a plurality of FC drives. A host
computer and a fiber channel switch portion are connected with an optical
fiber cable through respective fiber channel interfaces. The fiber
channel switch portion and FC drives are connected with respective
optical fiber cables through respective fiber channel interfaces. A
controlling portion and the FC drives are connected with respective -232C
cables. Alias WWNNs and alias WWPNs of the FC drives are assigned by the
controlling portion through respective RS-232C cables. Data reproduced by
the FC drives and data supplied thereto are transmitted to and received
from the host computer through, for example, respective optical fiber
cables.