Browse Prior Art Database

Magnetic Disk Servo Control Device

IP.com Disclosure Number: IPCOM000081652D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Zimmermann, V: AUTHOR [+2]

Abstract

This magnetic disk servo control device consists of a slider which supports a magnetic head configuration, provided for sensing servo and clock signals from a servo magnetizing pattern of a magnetic servo disk in a magnetic disk storage device.

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Magnetic Disk Servo Control Device

This magnetic disk servo control device consists of a slider which supports a magnetic head configuration, provided for sensing servo and clock signals from a servo magnetizing pattern of a magnetic servo disk in a magnetic disk storage device.

According to Fig. 1, slider 3, supporting magnetic head configuration 5s/5c (servo head/clock head) above magnetic servo disk 7, is connected to access arm 2 which is also connected to sliders 4 supporting magnetic data heads 6 above magnetic data disk 8. By a common access motor 1, both the magnetic head configuration 5s/5c and magnetic data heads 6 are associated with selected disk tracks, corresponding to each other on servo disk 7 and data disk
8.

When, according to Fig. 1, magnetic data heads 6 are associated with even numbered data tracks De of magnetic data disk 8 on magnetic servo disk 7, magnetic servo head 5s is set to the center line of a servo track S. In this position of access arm 2, magnetic head 5c is set to the full width of clock track C of magnetic servo disk 7.

When magnetic data heads 6 of the disk storage system are associated with odd numbered disk tracks Do, slider 3 is shifted on the magnetizing pattern of magnetic servo disk 7 by a distance corresponding to the width of one data track D, so that clock head 5c is set to the center line of servo track S, as shown in Fig.
2.

Likewise, servo head 5s is shifted from the center line of servo track S to the full width o...