Fujitsu Corporation

Tomoo Furukawa

Hiroyuki Kobayashi

Yukio Abe

Koji Ishii

Takehiko Tsuboi

Toshihiko Matsuda

Koji Ikenoya

Tsuyoshi Takahashi

When a combination head is on-tracked to an arbitrary cylinder position, a head position controller corrects a head position so as to eliminate an offset amount derived from an offset table. A bias current setting circuit obtains a current set value corresponding to an offset correction amount from a bias current table and supplies the bias current according to the current set value to an MR head. As kinds of offsets, there are a yaw angle offset, a thermal offset, and a core deviation offset.

Head assembly having a table for storing a head offset and bias current

A device for recording and reproducing data on a recording media includes an error detecting unit for detecting a defective sector by reading the data from the media, a data copying unit for copying the data of the defective sector to at least one temporary replacing sector, a test unit for testing whether the defective sector has a media defect, and a replacement unit for replacing the defective sector with a spare sector by copying the data of the at least one temporary replacing sector to the spare sector when the defective sector has the media defect.

Recording/reproducing device and method of replacing defective sector on

Growing community of inventors

Kawasaki, Japan

Tomoo Furukawa