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AC erase before write operation in Low Temperature

IP.com Disclosure Number: IPCOM000013793D
Original Publication Date: 2001-Jan-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Abstract

Disclosed is the method of preventing read hard error and improving the read performance at low temperature. In the application of Hard Disk Drive (HDD), the possibility of squeeze and and the poor over write performance is the trade-off. 1.Symptom When dada is overwritten at low temperature, the previous high-temperature-written data is not erased completely, which becomes noise and may fall into deep retry step or may cause read hard error eventually. 2. How to prevent When a write command is cast at low temperature, do AC erase first for the target data sector to erase the previous data. AC erase can make the disk magnetized neither way, and can reduce the noise element of low-temperature-written-data.