Roger E Anderson

Address:

23115 N Warmstone Way, Katy, TX 77494

Phone:

2813923040

VIN:

1GNFC13027R184941

Make:

CHEVROLET

Model:

TAHOE

Year:

2007

US Patent:

53752430, Dec 20, 1994

Filed:

Mar 7, 1994

Appl. No.:

8/208052

Inventors:

James D. Parzych - Houston TX
Richard Tomaszewski - Houston TX
Norman P. Brown - Tomball TX
Roger P. Anderson - Tomball TX
David M. Douglas - Houston TX
Kenneth W. Stufflebeam - Spring TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

G06F 1200
H04L 932

US Classification:

395725

Abstract:

A hard drive which prevents data access operations on the hard drive upon power up until the user enters a password. When the computer system is powered up, the hard drive spins up and is tested, responding only to a limited set of commands that do not permit data storage or retrieval operations. The password is located on the hard disk itself to prevent bypassing the hard drive's security using a new computer environment. When the user enters the correct password, the hard drive unlocks and operates as a conventional hard drive. If the user chooses, the hard drive may be unlocked by either of two passwords, one defined by the user and the other by the manufacturer. To obtain access to data areas during a locked state, a wipe data command is provided which overwrites all user data on the drive and unlocks the drive.