Non-Intrusive SCSI Status Sensing System.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 29, 1994
- Accession Number
- ADD016242
Entities
People
- Paul J. Giorgio
- Stephen J. Amuro
Organizations
- United States Department of the Navy