Abstract: The invention proposes a disk array unit capable of improving access performance. The disk array unit according to the invention includes: a plurality of semiconductor memories for storing data received from a host computer; a plurality of disk devices for storing the data; and a controller that redundantly configures the semiconductor memories and the disk devices by using a RAID 1 and controls reading of the data from the semiconductor memories or the disk devices. The controller reads the data from the semiconductor memories, and transmits the data, which are read from the semiconductor memories, to the host computer, when the semiconductor memories and the disk devices are in a normal state, or when the semiconductor memories are in an abnormal state and data areas of the semiconductor memories in which the data are stored are completely recovered.

Abstract: A manufacturing apparatus for a cathode ray tube attaches an electron gun to a neck of a glass valve while grasping the neck with a chuck apparatus. The chuck apparatus has at least three chuck members, a chuck member holding unit and an interlocking unit. Each chuck member has a neck contacting surface that lies on a single plane that is parallel with a central axis of the neck. The chuck member holding unit holds the chuck members so as to allow movement of the neck contacting surface of each chuck member from a periphery of the neck toward the central axis of the neck. The interlocking unit causes an interlocked movement of the chuck members so that the neck contacting surface of each chuck member moves with an equal displacement toward the central axis of the neck.