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HDD self identification

IP.com Disclosure Number: IPCOM000014429D
Original Publication Date: 2001-Dec-29
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

In order to recognize the number of heads in a HDD which has no jumper switch or EEPROM on its controller card, the special function of read preamp module(AE) called "open head checker" is used in this idea. When power on reset, the firmware checks all possible heads if it is open or not and counts the number of not-open heads. Control flow of firmware is as follows; Power on reset Initialize AE number_of_head := 0 for AE_port := 0 to MAX