A disk apparatus includes a slot. A magnetooptical disk is attached to the slot. When the slot is closed, a system controller inputs a corresponding signal to a CPU. The CPU applies a read-out command of disk information to the disk controller. The disk controller drives a spindle motor, an optical pick-up...http://www.google.co.uk/patents/US7123554?utm_source=gb-gplus-sharePatent US7123554 - Disk apparatus
