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Magnetic disk device and write method

A magnetic disk device and a technology for writing data, applied in the direction of transducing head device, information recording on magnetic disk, recording/reproducing/deleting method, etc., capable of solving problems such as narrow reading track width

Active Publication Date: 2018-07-17
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, in adjacent tracks, the read track width of the area near the start sector may be narrow

Method used

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  • Magnetic disk device and write method
  • Magnetic disk device and write method
  • Magnetic disk device and write method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0026] figure 1 It is a block diagram showing the configuration of the magnetic disk drive 1 according to the first embodiment.

[0027] The magnetic disk device 1 includes a head-disk assembly (HDA), which will be described later, a driver IC 20, a head amplifier integrated circuit (hereinafter referred to as a head amplifier IC) 30, a volatile memory 70, a nonvolatile memory 80, A buffer memory (buffer) 90 and a system controller 130 which is a one-chip integrated circuit. In addition, the magnetic disk device 1 is connected to a host system (host) 100 .

[0028] The HDA has a magnetic disk (hereinafter referred to as disk) 10 , a spindle motor (SPM) 12 , an arm 13 on which a head 15 is mounted, and a voice coil motor (VCM) 14 . The disc 10 is rotated by a spindle motor 12 . The arm 13 and the VCM 14 constitute an actuator. The actuator controls the movement of the head 15 mounted on the arm 13 to a target radial position on the disc 10 by driving the VCM 14 . The numbe...

Deformed example 1

[0094] The magnetic disk device 1 of Modification 1 is different from the magnetic disk device 1 of the first embodiment in that, when the target track generated by the ATC function is discontinuous, the current sector from the current track to the target track becomes different from the previous one. The sector following the sector where the sector is not consecutive generates a correction value.

[0095] Figure 10 It is a diagram showing an example of the track TR3 written along the correction track CP3 obtained by correcting the target track TP3 generated by the ATC function according to Modification 1. exist Figure 10 , shows the use of ATC functions along the Figure 6The track TR3 is written in the target track TP3 generated from the track FP2 of the track TR2 shown, and the corrected track CP3 obtained by correcting a part of the target track TP3.

[0096] exist Figure 10 In the shown example, the MPU 60 writes to the track TR3 along the target track TP3 up to th...

Deformed example 2

[0099] The difference between the magnetic disk device 1 of Modification 2 and the magnetic disk device 1 of the above-mentioned embodiment is that, when the target tracks generated by the ATC function are discontinuous, the start of the current track to the adjacent track is generated based on the track center. The track up to the forward sector of the sector.

[0100] Figure 11 It is a diagram showing an example of the track TR3 written along the correction track CP3 obtained by correcting the target track TP3 generated by the ATC function according to Modification 2. exist Figure 11 , shows the use of ATC functions along the Figure 6 The track TR3 is written in the target track TP3 generated from the track FP2 of the track TR2 shown, and the corrected track CP3 obtained by correcting a part of the target track TP3.

[0101] exist Figure 11 In the shown example, the MPU 60 writes to the track TR3 along the target track TP3 up to the sector S30 of the track TR3. The ...

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Abstract

An embodiment of the invention provides a magnetic disk device and a write method thereof, wherein reliability can be improved. The magnetic disk device includes a disk, a head configured to write data on the disk, and a controller. The controller generates a target trajectory of the head in a circumferential direction for writing to a plurality of sectors in a current track, wherein the target trajectory is based on an actual trajectory of the head for writing to a plurality of sectors in a previously written track that is adjacent to the current track, determines that the previously writtentrack is discontinuous between an initial sector of the previously written track and an end sector of the previously written track by a radial offset, generates a corrected trajectory for writing theplurality of sectors in the current track, and controls a position of the head in a radial direction based on the corrected trajectory while writing to the plurality of sectors in the current track.

Description

[0001] This application enjoys the priority of the earlier application of Japanese Patent Application No. 2017-1877 (application date is January 10, 2017). This application incorporates the entire content of the earlier application by referring to this earlier application. technical field [0002] Embodiments of the present invention relate to a magnetic disk device and a writing method. Background technique [0003] In recent years, various technologies for increasing the recording capacity of magnetic disk devices (such as HDDs) have been developed. As one of these technologies, there is a magnetic disk device in which data is written by a Shingled Write Magnetic Recording (SMR) method. When the magnetic disk device writes data to the disc by the tile recording method, it writes the current track while overlapping with a part of the previously written adjacent track (hereinafter simply referred to as the adjacent track). In a magnetic disk device, by writing data by a ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/55G11B21/10
CPCG11B5/5521G11B21/106G11B5/012G11B5/59627G11B5/09
Inventor 河边享之原武生
Owner KK TOSHIBA