Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Servo information writing method, servo control method, data memory equipment and program

A technology of servo information and servo control, applied in information storage, recording information storage, data recording and other directions

Inactive Publication Date: 2007-08-01
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using the above method has the limitation that servo information writing must be performed in a clean room

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Servo information writing method, servo control method, data memory equipment and program
  • Servo information writing method, servo control method, data memory equipment and program
  • Servo information writing method, servo control method, data memory equipment and program

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0071]FIG. 1 is a block diagram illustrating main components of a hard disk drive 1. As shown in FIG. FIG. 2 is a plan view illustrating main components of the hard disk drive 1. As shown in FIG. A hard disk drive 1 includes a magnetic disk 2, a spindle motor 3, a magnetic head 4, an actuator 5, a VCM (voice coil motor) 6, a VCM driver 7, a DAC (digital / analog converter) 8, an emergency stop device 9, and a preamplifier 10 , read / write channel 11, MPU (Micro Processing Unit) 12, HDC (Hard Disk Controller) 13, ROM (Read Only Memory) 14, RAM (Random Access Memory) 15, and connected to a computer or similar device through HDC13 (not shown). Figure 1 shows an example where only one unit of Disk 2 is installed, although one or more units of Disk 2 can be installed as desired.

[0072] When the hard disk drive 1 operates, the magnetic disk 2 used as a magneti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A servo system wherein a read head R detects a servo pattern that is written on a magnetic disk by a write head W. Position control of the write head W is exercised in accordance with the detected servo pattern, and the read head R detects a propagation pattern that is written on the magnetic disk by the write head W. Position of the write head W is corrected in accordance with the detected propagation pattern.

Description

technical field [0001] The present invention relates to a servo information writing method, a servo control method, a data storage device, and a program for a storage medium, specifically, a servo information self-writing method, a servo control method, a data storage device, and a program. Background technique [0002] A hard disk drive, widely used as a data storage device for computers and similar devices, includes a magnetic head for reading user data stored on the disk or writing user data to the disk. The magnetic head is mounted on an actuator vibrated by a VCM (Voice Coil Motor). When the magnetic head reads or writes user data, the actuator is driven to move the magnetic head to a specific track (target track) for positioning. Head positioning control is performed based on the servo information stored on the disk to move the head to a specified position. With the improvement of recording density, hard disk drives produced in recent years have begun to use MR (magn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/596G11B21/10G11B21/08
CPCG11B21/106G11B5/59633
Inventor 佐井文宪黒田尚小笠原健治松原畅也柳沢洋井芹薰
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com