Method and apparatus for calibrating a thermal response of a mag

Details Method and apparatus for calibrating a thermal response of a mag Method and apparatus for calibrating a thermal response of a mag

1996-08-21

1998-11-17

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, 360135, G11B 1300

Patent

active

058385142

ABSTRACT:
A method and apparatus for calibrating a thermal response of an MR element spaced apart from a surface of a data storage disk is disclosed. A calibration feature, such as a depression, is provided on a surface of the disk. Signals are read from the calibration depression and a location on the disk surface other than the calibration depression using the MR element. Magnetic and thermal spacing signals are produced using the readback signals. A calibrated thermal spacing signal is produced using the magnetic spacing signals and the thermal spacing signals, such that the calibrated thermal spacing signal varies proportionally or, alternatively, linearly with respect to variations in spacing between the MR element and the disk surface. The calibration methodology is preferably performed in-situ a data storage system.

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