Fujitsu Corporation

Tatsuya Ohmido

Yoshiki Akiyama

Hiroshi Shibuya

Katsumi Inazawa

Masahiko Sakaguchi

Ichiro Sakuma

Ryuuichi Miyaguchi

Hitomi Ono

A library apparatus capable of directly entering a large number of recording medium cartridges all at once into a given cell column of a cell drum. The library apparatus includes a recording medium drive unit for writing and reading data to and from a recording medium cartridge; a cartridge entry unit for entering recording medium cartridges into the library apparatus; an automatic cartridge exit unit for automatically ejecting recording medium cartridges from inside the library apparatus; and an accessor for transporting recording medium cartridges through the cell drum, recording medium drive unit, cartridge entry unit and automatic cartridge exit unit. The library apparatus further includes a swinging door that opens and closes to allow recording medium cartridges to enter all at once into the cells of a given cell column in the cell unit, and a faulty cartridge entry detection mechanism for detecting any faulty entry of a recording medium cartridge into any cell of the cell column. The data about that cell column in the cell drum in which cartridges were switched are stored into a nonvolatile memory in an accessor controller that controls the accessor.

Library apparatus having cartridge direct entry and exit mechanism

A library apparatus having a motor driving control circuit including a processor, a motor driver circuit, a relay, a motor abnormal condition detection circuit, a current control circuit, an excess current detection circuit, and an abnormal current monitor circuit. The motor abnormal condition detection circuit is connected to the motor driver circuit, and detects an abnormal condition of at least one of the motor and the motor driver circuit. Upon detecting an abnormal condition, the motor abnormal condition detection circuit outputs a motor abnormal condition detection signal which prompts the current control circuit to regulate the current flowing through the motor driver circuit. If the current control circuit is unsuccessful, the excess current detection circuit outputs an excess current detection signal which triggers the relay to close the power source circuit of the motor driver circuit.

Library apparatus having a motor driving control including abnormal

A control apparatus for a non-volatile memory and applications of the control apparatus to electronic computer peripheral equipments are disclosed. For example, a NOVRAM (non-volatile static random access memory) is used as the non-volatile memory so that data of the status of the apparatus are stored into the non-volatile memory while the apparatus is operating in order to perform recovery of the apparatus quickly after a trouble such as turning off of the power or service interruption occurs.

Non-volatile memory controlling apparatus and applications of the same

Growing community of inventors

Kawasaki, Japan

Tatsuya Ohmido