Data storage device with full access by all users

Details Data storage device with full access by all users Data storage device with full access by all users

2007-06-26

2007-06-26

Huynh, Kim (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S036000, C710S008000, C710S011000, C710S014000

Reexamination Certificate

active

10810566

ABSTRACT:
A peripheral device of a host computer includes a microcontroller and two virtual devices. The first virtual device passes, to the microcontroller, commands of a first command set from any user of the host computer and preferably also commands of a second command set from only privileged users of the host computer. The second virtual device passes, to the microcontroller, commands of the second set from any user of the host computer. In one physical implementation of the invention, the two virtual devices are implemented as separate physical devices, and the second device is connected to an interface to the host computer only if the user is not privileged. In another physical implementation of the invention, the two virtual devices are implemented in a common physical device, and a sector of a memory of the peripheral device is reserved for handling commands of the second set from non-privileged users.

REFERENCES:
patent: 6073226 (2000-06-01), Cutshall et al.
patent: 6385677 (2002-05-01), Yao
patent: 6502146 (2002-12-01), Rasmussen et al.
patent: 6813725 (2004-11-01), Hanes et al.
patent: 2002/0162009 (2002-10-01), Shmueli et al.
patent: 2003/0225765 (2003-12-01), Frieden et al.

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