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Hard Disk Drive and Head Positioning Method

A technology of hard disk drive and positioning method, which is applied in the direction of instruments, keeping the head frame aligned, and aligning the magnetic tracks on the disk, etc., which can solve the problems of not being able to improve the linear recording density and reducing the BPI

Active Publication Date: 2019-03-01
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to improve the positioning accuracy, the number of servo areas in a track can be increased, but when the servo area increases, the data area decreases accordingly, and the BPI decreases, which cannot increase the linear recording density

Method used

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  • Hard Disk Drive and Head Positioning Method
  • Hard Disk Drive and Head Positioning Method
  • Hard Disk Drive and Head Positioning Method

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no. 2 example

[0067] The above description is based on the premise that even if the servo data is written at a predetermined track pitch or the track pitch of the servo data deviates, it can be corrected by the RRO data. However, when writing servo data, the track pitch may deviate due to disc eccentricity or the like. As described above, when the heads 16A and 16B deviate from the track center during data reading, the output itself of the read head 16B or its signal processing results, that is, the bit error rate and frequency tracking characteristics, etc., deteriorate. If this deterioration always occurs, it can be judged that the track pitch of the servo data deviates. Such as Figure 10A As shown, when the track pitch of the servo data is narrower than usual, when the read head 16B is positioned based on the servo data to write data, the write head 16A moves toward the outer peripheral side of the target track ( Figure 10A Middle is the upper side) deviation. When reading while wri...

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Abstract

According to one embodiment, a hard disk drive includes a disk including a plurality of data areas, and a plurality of servo areas between the plurality of data areas, an arm holding a write head and a read arm, and a positioning module which positions the read head or the write head by rotating the arm, wherein the positioning module positioning the write head by positioning the read head, and adjusting a position of the read head or the write head, based on an output of the read head located in a data area between two servo areas adjacent in a peripheral direction, of the plurality of servo areas.

Description

[0001] This application claims the priority of the earlier application with U.S. provisional patent application No. 62 / 210,613 (filing date: August 27, 2015). This application incorporates the entire content of the earlier application by reference to this earlier application. technical field [0002] This embodiment basically relates to a hard disk drive and a head positioning method. Background technique [0003] In hard disk drives, it is desired to increase the areal recording density, which is the recording capacity per unit area of ​​a magnetic disk (hereinafter simply referred to as a disk). The areal recording density is the product of the linear recording density and the track density. The linear recording density is a recording capacity per unit length in the direction of a track, for example, represented by recording bits per inch, that is, BPI. The track density is the recording capacity per unit length in the radial direction, and is represented by, for example...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/48G11B5/596
CPCG11B19/045G11B5/59611G11B5/59627
Inventor 古桥贵夫
Owner KK TOSHIBA