Browse Prior Art Database

PES Automated Monitoring Function

IP.com Disclosure Number: IPCOM000013313D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 1 page(s) / 27K

Publishing Venue

IBM

Abstract

This disclosure provides the easy way to monitor the internal status of Positioning Error Signal which was used for position control of Read/Write Head on Hard Disk Drive from outside of Drive.

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PES Automated Monitoring Function

This disclosure provides the easy way to monitor the internal status of
Positioning Error Signal which was used for position control of Read/Write
Head on Hard Disk Drive from outside of Drive.

In general, PES signal monitoring needs host PC with special monitoring tool
because PES signal required to be analyzed by host PC with SCSI special
command. Or needs to be add the special function on micro controller on HDD
for analysis the PES signal.

But in this disclosure, with the Optional Jumper setting, HDD provides PES
signal with serial data stream, it can be monitored with external D/A
Converter card. There is no need to modify the Logical Circuits on HDD itself.
And also this signal is provided automatically by Hardware Assist function
without processing of micro processor on HDD which control the Read/Write
Head.

Hard Disk Drive has jumper pin for get information of user configuration. We
cannot add more jumper pin for PES monitoring because there is limitation of
space and cost view point. So this disclosure makes jumper multifunction,
getting user setting and PES signal output.

The algorithm for multifunction is :

      When after power on reset, disclosure realized the multifunction of
jumper pin with followings flow.

POR

·

Confirm (read) the jumper pin

·

              The value of all jumper pin is HIGH(means there is no jumper
pin)

· ·
· Yes · NO
· ·
Means PES Monitoring required Means PES
Monitoring not required

              Output the serial data from jumper pin
Ju...