Patent
1994-03-29
1997-07-29
Bowler, Alyssa H.
3952002, 395839, G06F 1320, G06F 1340, G06F 1516
Patent
active
056528396
ABSTRACT:
An improved method of having an SCSI controller provide a logical connect 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 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.
REFERENCES:
patent: 4783730 (1988-11-01), Fischer
patent: 4864532 (1989-09-01), Reeve et al.
Amuro Stephen J.
Giorgio Paul J.
Bowler Alyssa H.
Gauthier Robert W.
Lall Prithvi C.
McGowan Michael J.
Rinehart Mark H.
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