Browse Prior Art Database

ID for Quick-On PC and HDD communication

IP.com Disclosure Number: IPCOM000010618D
Original Publication Date: 2002-Dec-25
Included in the Prior Art Database: 2002-Dec-25
Document File: 1 page(s) / 8K

Publishing Venue

IBM

Abstract

Quick-On-PC can be achieved by using Non-volatile memory such as MRAM which enables PC to power on without transferring the power on program from Storage, such as Hard Disk Drive.The system will start the program with just after the powered off one but the auxiliary devices such as HDD does not start with the exact conditions at powered off which causes the miss operation as a result. This proposal solves the system consistency with quick-on operation.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 61% of the total text.

Page 1 of 1

THIS COPY WAS MADE FROM AN INTERNAL IBM DOCUMENT AND NOT FROM THE PUBLISHED BOOK

JP820010849 Akihiko Nadaguchi/Japan/IBM Hideo Asano, Hiroyuki Ono, Kohki Noda, Hiroshi Umezaki, Toshio Sunaga, Hisatada Miyatake, Kohji 2 Kitamura

ID for Quick-On PC and HDD communication

There are three items in this proposal.

1) Required functions in the system and HDD for this operation.

Allocate the non-volatile ID area in the system and HDD. This ID is used for mutual identification.

Non-volatile register area in the system to store the latest parameter set to HDD.

Non-Volatile memory area which stores HDD operation conditions and parameters used.


1.


2.


3.

2) The sequence in the system and HDD during power-off

The system will generate the random ID, store it, and send it to HDD when there is power-off request.

This ID is not for the security but to verify the device status is same at the powered off. So this ID can be easily generated randomly. Store the commands sequence not sent to HDD and their data in the non-volatile area.

Save the parameter set to HDD in the designated non-volatile area.

Request the normal power off sequence to HDD. Use flash command to detect HDD is ready for the

power-off. HDD stores current internal status and ID sent from the system in the designated non-volatile area.

Start power-off sequence. The system will save all the required MPU internal information in the nonvolatile memory area after


1.


2.


3.


4.


5.


6.

verifying HDD is ready to power-off, then...