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Protecting Data Loss with Preparing Shadow Head Coupled with Original Head

IP.com Disclosure Number: IPCOM000015882D
Original Publication Date: 2002-Aug-21
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue

IBM

Abstract

D isclosed is a method for Protecting Data Loss with Preparing Shadow Head Coupled with Original Head in a Hard Disk Drive(HDD). I n this invention, when read error occurs with cause of disk defect, it is the first purpose to prevent data loss with restoring automatically using backup data(we call this as Shadow data). Moreover, data loss can be protected from not only with cause of disk defect but also of fatal head defect by using two modes "Usual-Couple-Mode" and "Emergency-Single-Mode" newly prepared. Therefore reliability will be raised more nearly further. T his invention is aimed at mobile HDD which have even Heads. The capacity of HDD is divided into two and one is used as a Backup. Format: