Patent ID: 8964326
Filing Date: 2015-02-24
Classification: G11B

Abstract:
1. A disk storage apparatus, comprising: a first slider configured to fly over a first recording surface of a first disk and comprising a first head comprising a write element, a read element, and a heater element, the heater element being configured to project the first head toward the first recording surface of the first disk by thermally deforming the first head depending on heater power supplied to the heater element; a controller configured to reduce a value for the heater power before performing a seek operation of moving the first head from a first track to a second track such that the first head moves across a concentric circular area including a protrusion on the first recording surface, and to start the seek operation after a wait time, needed for a flying height of the first head to increase to a first flying height in response to the reduction in the heater power, elapses; a variable gain amplifier configured to amplify a read signal read from the first recording surface by the first head, by a set gain; and an automatic gain controller configured to set the gain of the variable gain amplifier so that the read signal amplified by the variable gain amplifier has a given amplitude, wherein, the controller is further configured to: