Patent ID: 8654481

Claim:
A magnetic disk inspection system comprising: a plurality of optical inspection units; a cassette supply and collection unit that transfers a cassette in which an uninspected magnetic disk is stored, to the plurality of optical inspection units, and collects a cassette in which a magnetic disk inspected by the plurality of optical inspection units is stored; a cassette housing unit that houses the cassette in which the uninspected magnetic disk is stored and the cassette in which the inspected magnetic disk is stored; and a disk handling unit that takes out a magnetic disk from the cassette in which the uninspected magnetic disk is stored and which is transferred by the cassette supply and collection unit, loads the magnetic disk to the optical inspection unit, and then stores the magnetic disks inspected by the optical inspection units in the corresponding cassettes in such a manner that the magnetic disks are delivered to the cassettes responsive to results of the inspection, wherein the cassette supply and collection unit works as: taking out at least one of the cassette in which the uninspected magnetic disk is stored and an empty cassette for storing inspected magnetic disk, from the cassette housing unit; transferring at least one of the cassettes to any one of the plurality of optical inspection units; taking out, from any one of the plurality of optical inspection units, at least one of an empty cassette from which an uninspected magnetic disk has been taken out and a cassette in which a magnetic disk determined as a non-defective product among the inspected magnetic disks is stored; and transferring the took out cassette to the cassette housing unit.