Accession Number : ADD016242

Title :   Non-Intrusive SCSI Status Sensing System.

Descriptive Note : Patent Application, filed 29 Mar 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 29 Mar 1994

Pagination or Media Count : 26

Abstract : An improved SCSI controller provides 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, is scheduled to 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 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 on a local area network (LAN) arrangement wherein a significant number of host processors are requesting data.

Descriptors :   *LOCAL AREA NETWORKS, *PATENT APPLICATIONS, *HOST COMPUTERS, *INTERFACES, ADAPTERS, ALGORITHMS, MONITORING, TARGETS, FAULT TOLERANT COMPUTING

Subject Categories : Computer Systems
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE