Appeal No. 95-4227
Application 08/060,858
Claim 1 is the only independent claim and reads as
follows:
1. In a disc drive for the storage of computer files
wherein the files are stored along data tracks on data surfaces
of a plurality of rotating discs by data heads supported
proximately the data surfaces by an actuator positionable with
respect to the discs to radially position the data heads on the
data surfaces;
wherein the data tracks are organized into concentric
cylinders each including a servo track defined by a servo pattern
prerecorded on a dedicated servo surface of one of said discs;
and wherein the disc drive comprises servo means,
including a servo head supported on the actuator proximate the
dedicated servo surface, for positioning the actuator so as to
position the servo head in relation to the servo tracks, whereby
the servo means can be operated to move the servo head to a
selected servo track and subsequently position the servo head in
relation to the selected servo track to position the data heads
in relation to the data tracks;
a method for following a selected data track on a
selected data surface by the data head proximate the selected
data surface comprising the steps of:
selecting an optimum track on the dedicated servo
surface for positioning the selected data head in relation to the
data tracks on the selected data surface by positioning the servo
head in relation to the optimum track on the dedicated servo
surface, wherein the optimum track is displaced from the servo
track in the cylinder containing the selected data track by a
track offset comprising a predetermined number of track spacings
that will compensate for misalignment between the selected data
head and the servo head that exceeds a track spacing;
moving the servo head to the optimum track;
and subsequently positioning the servo head with
respect to the optimum track to displace the servo head from the
optimum track in accordance with a predetermined thermal
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Last modified: November 3, 2007