Accession Number : ADD018706

Title :   Method of Non-Intrusively Sensing Status in a Computer Peripheral

Descriptive Note : Patent, Filed 29 Mar 94, patented 29 Jul 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Giorgio, Paul J ; Amuro, Stephen J

Report Date : 29 Jul 1997

Pagination or Media Count : 11

Abstract : An improved method of having an SCSI controller provide a logical connection between a plurality of host processors using a single SCSI initiator. The controller contains removable host adapters for connection to any type of host processor interface. When a host processor requests status information of a target device, that status information is passed to the requesting processor and subsequently stored in the controller and made available to all other host processors. In addition, a fault tolerant performance monitoring algorithm, executing within the controller, non-intrusively and periodically check the status of each SCSI target device and to store that status information for all host processors. The advantage to such a controller is that by using only a single SCSI initiator, each host processor can independently and logically connect through the controller and SCSI initiator to a target without clearing target status information for other host processors. This is particularly advantageous when adapted to function in a local area network (LAN) arrangement wherein a significant number of host processors are requesting data.

Descriptors :   *COMPUTER ARCHITECTURE, *CENTRAL PROCESSING UNITS, *PATENTS, COMPUTER COMMUNICATIONS, LOCAL AREA NETWORKS, MICROPROCESSORS, INTERFACES, CHIPS(ELECTRONICS), RANDOM ACCESS COMPUTER STORAGE, MICROCOMPUTERS

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE