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Correcting errors in position of an hdd write-head

一种硬盘驱动器、致动器的技术，应用在记录头的配置/安装、在磁盘上信息的记录、仪器等方向，能够解决数据易发生拥挤事件等问题

Active Publication Date: 2010-11-10
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, congestion events are particularly prone to occur when data is written by shingle writing, because shingle writing is usually only used in systems with extremely high track densities

Method used

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  • Correcting errors in position of an hdd write-head
  • Correcting errors in position of an hdd write-head
  • Correcting errors in position of an hdd write-head

Examples

Experimental program
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Embodiment Construction

[0020] The following describes an approach for correcting positioning errors of a write head (also referred to as a magnetic recording head) of a hard disk drive (HDD). In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention presented herein. It should be understood, however, that the embodiments of the invention provided herein may be practiced without these specific details. In addition, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the embodiments of the invention presented herein.

[0021] Embodiments of the present invention employ a variety of approaches to correct positioning errors of the magnetic recording head of a hard disk drive. The position of the magnetic recording head can be misaligned with the data track being written for a variety of reasons. For example, bumping or moving ...

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Abstract

A hard-disk drive (HDD) with a current adjustment component is provided. The current adjustment component changes an amount of current to a magnetic-recording head of the HDD to cause a change in the strength of a magnetic write field produced by the magnetic-recording head in response to a determination that a present position of the magnetic-head head is not in a desired position. To illustrate, in response to a determination that the present position of the magnetic-recording head is further away from an edge of a current track being written than a desired position of the magnetic-recording head, the current adjustment component increases the current to the magnetic-recording head to cause an increase in the strength of the magnetic write field. The change in the strength of the magnetic write field causes data, written by the magnetic-recording head, to be located at a desired location on the magnetic-recording disk.

Description

technical field [0001] The present invention is mainly concerned with the approach of correcting the positioning error of the write head of a hard disk drive (HDD). Background technique [0002] A hard disk drive is a non-volatile storage device housed in a protective housing that stores digitally encoded data on one or more circular platters (discs may also be called platters) that have a magnetic surface. When the hard drive is in operation, each magnetic recording platter is spun rapidly by a spindle system. Data is read from and written to a magnetic recording disk using a read / write head positioned at a specific location over the disk by an actuator. [0003] The read / write head uses a magnetic field to read and write data to and from the surface of the magnetic recording disk. Since the magnetic dipole field decreases rapidly with distance from the pole, the separation between the read / write head and the surface of the magnetic recording disk must be tightly controll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/56
CPCG11B5/6064G11B2005/0021G11B5/5552G11B5/012G11B2005/001G11B5/6005
Inventor 罗杰·W·伍德詹姆斯·T·奥尔森金振迈克尔·P·萨洛
Owner WESTERN DIGITAL TECH INC