Patent ID: 9286928
Filing Date: 2016-03-15
CPC Classification: G11B

Claim Text:
1. A measurement method for use in a disk device comprising a disk, and a head configured to protrude toward the disk when power is supplied to a heater, the method comprising: acquiring a reference value for each of a plurality of areas into which the disk is divided, from a measurement-value distribution including a plurality of measured values measured by a measurement in advance, the measurement including measuring a value corresponding to power supplied to the heater when the head contact with the disk; acquiring, in each of the plurality of areas, a groups of data calculated based on the measurement-value distribution and the acquired reference value; referring to the groups of data corresponding to each of the plurality of areas, and selecting, from the plurality of areas as a first area to be firstly subjected to the measurement, an area where the groups of data has lower values than in other areas; and selecting an area to be subjected to the measurement subsequent to the first area based on the groups of data in each areas.