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Overwrite Compensation Method for a Hard Disk Drive

IP.com Disclosure Number: IPCOM000013860D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Related People

Authors:
Masahiro Shimizu Haruo Andoh Yoshiroh Amano Takao Matsui

Abstract

Disclosed is a method to compensate poor overwrite performance at a low temperature for a Hard Disk Drive (HDD). The overwrite performance generally becomes worse at the low temperature, which depends on a write head and a d performance. And it becomes difficult to read a data that is written in the poor overwrite situation. Increasing the write current can improve the performance at that time. A thermal sensor helps to apply the higher write current by sensing the low temperature. And it is possible to forecast the overwrite performance of one write head at low temperature by using a special pattern and an accumulator of errors in a manufacturing process.