US 2019/0295577 A1 · MAGNETIC DISK DEVICE

Abstract

According to one embodiment, a magnetic disk device includes a disk including a first region and a second region different from the first region, a head that writes data on the disk and reads data from the disk, an actuator that positions the head on the disk, and a controller which positions the head by driving the actuator and writes data in the first region and the second region with the head, a skew angle of the head with respect to a circumferential direction of the disk varying within a first angle in the first region, and varying, in the second region, from a second angle larger than the first angle to a third angle larger than the first angle and the second angle.

Claims20

Dependent claims

A magnetic disk device comprising:

a disk including a first region and a second region different from the first region;
a head that writes data on the disk and reads data from the disk;
an actuator that positions the head on the disk;
and
a controller which positions the head by driving the actuator and writes data, in the first region and the second region with the head,
a skew angle of the head with respect to a circumferential direction of the disk varying within a first angle in the first region, and varying, in the second region, from a second angle larger than the first angle to a third angle larger than the first angle and the second angle.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/111,927Filed 24 Aug 2018

Priority

JP 2018-05535622 Mar 2018

Published

26 Sep 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G11B 5/53
With simultaneous movement of head and record carrier, e.g. rotation of head: disposition or mounting of heads on rotating support
G11B 20/10388
Signal quality assessment: control of the read or write heads, e.g. tracking errors, defocus or tilt compensation
G11B 20/1217
Formatting, e.g. arrangement of data block or words on the record carriers: on discs
G11B 5/54
Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to…:…

Magnetic disk device

Life of this patent

Magnetic disk device

Life of this patent

Abstract

Claims20