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Browse Prior Art Database

Magnetic Storage Disk System

IP.com Disclosure Number: IPCOM000112232D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Ikeda, Y: AUTHOR

Abstract

Disclosed is a system for magnetic rigid disk storage system that moves the read/write head position to the outer edge of the disk before spin-down. In the spin-down operation, the head is then moved to the inner edge by the frictional force generated between head and disk.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 56% of the total text.

Magnetic Storage Disk System

      Disclosed is a system for magnetic rigid disk storage system
that moves the read/write head position to the outer edge of the disk
before spin-down.  In the spin-down operation, the head is then moved
to the inner edge by the frictional force generated between head and
disk.

      Fig. 1 shows a comparison of the conventional and new method of
head position control in spin-down operation.  In the conventional
method, the head is moved to the inner edge and locked in position
before landing on the disk surface, and the disk's rotational speed
is then reduced.  Thus the head lands at the inner edge of the disk
every time.  On the other hand, in the new method of spin-down
operation, the head is moved to outer edge before landing, and the
disk rotational speed is then reduced.  The head stays at the outer
edge until it comes into contact with the disk surface.  When the
head come into contact with the disk surface, the head is moved to
the inner edge of the disk by the frictional force generated
frictional force generated at the point of contact between head and
disk.  In this mode of operation, the pivot of the head's arm should
be at the position such that the head's skew angle (the angle between
the central axis of the head's arm and the disk's tangential
direction) is zero at the inner edge of the disk.  When the pivot is
located at this position, the frictional force always moves the head
to the inner edge of the disk in...