Fujitsu Corporation

Shunsuke Aoki

Shigenori Yanagi

Osamu Yoshida

A control apparatus performs, when reading predetermined data stored in a storage medium, a correction of a signal read by a head during a Viterbi decoding process of the signal. A signal-quality-value calculating unit calculates a signal quality value of the signal based on a status of the correction during the Viterbi decoding process. A signal-quality-value storing unit stores the calculated signal quality value in a storage area.

Control apparatus and storage device

A control device that controls a storage device having an auto-gain-control function for controlling strength of an output signal from a head that reads data from a storage medium, which includes a determining unit that determines whether the strength of the output signal controlled by the auto-gain-control function is within a predetermined range, an abnormal-float detecting unit that detects an abnormal float of the head based on a result from the determining unit, an abnormal-float-number counting unit that counts a number of times of the detected abnormal floats of the head, and an abnormal-float-count storing unit that stores the counted number of times of the abnormal floats into a storage area of the storage device.

Growing community of inventors

Kawasaki, Japan

Shunsuke Aoki