Method of non-intrusively sensing status in a computer peripheral
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United States of America Patent
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Jul 29, 1997
Grant Date -
N/A
app pub date -
Mar 29, 1994
filing date -
Mar 29, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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