Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive

一种磁盘驱动器、垂直磁记录的技术，应用在驱动/移动记录头、对齐磁盘上的磁道、记录头的配置/安装等方向，能够解决降低写操作性能、恶化磁盘驱动器生产率等问题

Inactive Publication Date: 2005-02-16
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Therefore, if a large number of errors are generated in the comparison between cylinder codes, it will deteriorate the productivity of the disk drive
In addition, if an error occurs in the comparison between cylinder codes after the product is shipped, a replacement track allocation operation needs to be performed, thereby degrading the performance of the write operation

Method used

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  • Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive
  • Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive
  • Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive

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Embodiment Construction

[0029] Embodiments of the present invention will be described below with reference to the drawings.

[0030] Figure 1 to image 3 The configuration of a perpendicular magnetic recording disk drive according to an embodiment of the present invention is shown.

[0031] (disk drive configuration)

[0032] image 3 is an external view mainly showing the mechanism of the disk drive.

[0033] like image 3 As shown, the disk drive 1 includes: a magnetic disk 10 of a perpendicular magnetic recording medium, a magnetic head 11 for reading and writing data to the magnetic disk 10, a spindle motor 15 for rotating the magnetic disk 10, and an actuator (cradle) 13 for carrying the magnetic head 11 .

[0034] The magnetic head 11 includes: a write head 11W constituted by a unipolar magnetic head suitable for perpendicular magnetic recording; and a read head 11R constituted by a GMR (Giant Magneto Resistance) unit. The write head 11W and the read head 11R are mounted on the same slide...

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Abstract

A perpendicular magnetic recording disk drive is discloses which performs a head positioning control operation effectively against a hard easy transition shift (HETS) phenomenon. In the disk drive, a CPU performs an offset correcting operation in positioning control mode after a seek operation, using an offset value set on the basis of the HETS phenomenon from a memory when data is recorded.

Description

technical field [0001] The present invention generally relates to perpendicular magnetic recording disk drives, and more particularly, the present invention relates to head positioning control operations performed based on perpendicular magnetic recorded servo data. Background technique [0002] Recently, practical use of perpendicular magnetic recording disk drives has been promoted. Generally, during perpendicular magnetic recording, servo data for head positioning control is recorded to a magnetic medium (hereinafter referred to as a magnetic disk) using a write head called a single pole type (SPT) head suitable for perpendicular magnetic recording. [0003] As we all know, servo data is roughly divided into cylinder code (track address), which is used to identify the track (cylinder) on the disk; and servo burst (burst) signal (sometimes called burst data), which is used to detect the head position within each track. [0004] A magnetic disk drive includes a head posit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B21/10G11B5/55G11B5/588G11B5/596
CPCG11B5/5556G11B5/59627
Inventor 長船贡治下村和人矢野耕司
Owner KK TOSHIBA
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