A plurality of library apparatuses is placed on top of each other to comprise
one
library system as a whole. Each library apparatus has a plurality of cabinets,
a plurality of read/write apparatuses, a slot, a controller, and a transfer mechanism
having a function of transferring the recording medium according to control of
the controller. The controller causes (controles) the transfer mechanism to transfer
the recording medium among the cabinet, read/write apparatus, slot, and slots of
library apparatuses provided adjacent to each other. The recording medium is loaded
from the cabinet of an arbitrary library apparatus, transferred from the transfer
mechanisms of the plurality of library apparatuses sequentially as required, and
the transferred recoding medium is accessed by the read/write apparatus of an arbitrary
library apparatus. The recording medium accessed by the read/write apparatus is
transferred in the same way and stored in the cabinet.
