International Business Machines Corporation

Daniel W Sherman

Steven Edward Klein

Roger Gregory Hathorn

Dung Ngoc Dang

Stephen LaRoux Blinick

Charles Scott Cardinell

Ashwani Kumar

Systems and methods for detecting supported small form-factor pluggable (SFP) devices in an adapter are provided. One system includes multiple ports, each port configured to be coupled to a SFP device, a tracking device configured to store data representing a list of supported SFP devices for the adapter, and a processor coupled to each of the plurality of ports and the tracking device. The processor is configured to scan each port at start-up, determine if any of the ports is coupled to a non-supported SFP device, and disable any ports that are coupled to a non-supported SFP device. One method includes scanning each port at start-up, determining if any of the ports is coupled to a non-supported SFP device, and disabling any ports that are coupled to a non-supported SFP device. Also provided are computer storage mediums including computer code for performing the above method.

Systems and methods for detecting supported small form-factor pluggable (SFP) devices

A fabric login (FLOGI) in a Fiber Channel (FC) adapter is throttled. The system includes a first tracking mechanism, a second tracking mechanism, a switch, and an FC adapter. The FC adapter comprises three or more FLOGIs and a controller. First and second FLOGI requests are transmitted to the switch and indicate, via a first tracking mechanism, that a first FLOGI associated with the first FLOGI request and a second FLOGI associated with the second FLOGI request are active. A third FLOGI request is queued until the first FLOGI request or the second FLOGI request is processed by the switch and indicates, via a second tracking mechanism, that a third FLOGI associated with a third FLOGI request is queued.

Systems and methods for throttling a fabric login in a Fibre Channel adapter

A fabric login (FLOGI) in a Fibre Channel (FC) adapter is throttled by a system. The system includes a first tracking mechanism, a second tracking mechanism, a switch, and an FC adapter. The FC adapter comprises three or more FLOGIs and a controller.

Systems and methods for throttling a fabric login in a fibre channel adapter

Systems and methods for scanning ports for work are provided. One system includes one or more processors, multiple ports, a first tracking mechanism, and a second tracking mechanism for tracking high priority work and low priority work, respectively. The processor(s) is/are configured to perform the below method. One method includes scanning the ports, finding high priority work on a port, and accepting or declining the high priority work. The method further includes changing a designation of the processor to TRUE in the first tracking mechanism if the processor accepts the high priority work such that the processor is allowed to perform the high priority work on the port. Also provided are computer storage mediums including computer code for performing the above method.

Systems and methods for dynamically scanning a plurality of active ports for priority schedule of work

A method for logging a repetitive error in a computer system is provided. The repetitive error is logged after each of a series of progressively increasing time periods. The logging commences when the repetitive error is first identified and concludes when the repetitive error is no longer identified.

Ramped error logging system

A method for initializing a fiber channel link upon a failure of a standard speed negotiation algorithm is provided. The standard speed negotiation algorithm is disabled. A link speed is set to a highest possible link speed not yet attempted outside the standard speed negotiation algorithm, initializing the fiber channel link if the link speed is negotiated at a maximum link speed. If the link speed is negotiated at a speed less than the maximum link speed, the standard speed negotiation algorithm is reattempted, initializing the fiber channel link according to the standard speed negotiation algorithm if the reattempt is successful.

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Los Angeles, CA, United States of America

Daniel W Sherman