Importance

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Abstract

An apparatus and method for monitoring the environment of remote components attached to a host processor by means of a standard interface bus having a limited number of address ports. The invention includes a host adapter incorporating a standard bus repeater component and an environment monitoring component. The environment monitoring component has a standard bus interface and is selectably coupled to the standard interface bus, and hence to a host processor. The host interface transceiver is coupled by means of a standard bus to the host processor, and is also selectably coupled to a drive interface transceiver by means of the standard bus. The drive interface transceiver is coupled by the standard bus to one or more storage devices. The host adapter is selectably switchable between two modes, such that either the drive interface transceiver is coupled through the host interface transceiver to the host processor, or the environment monitoring component is coupled to the host processor. The inventive system reduces the overhead of an environment monitoring system in terms of address ports on a standard bus having a limited number of address ports. In addition, the bus repeater component of the inventive system permits doubling the cable length limit imposed on certain standard buses, thereby permitting more remote location of one or more storage devices from a host processor.

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First Claim