Emulex Design & Manufacturing Corporation

Goodrich Corporation

Michael L White

Bruce Gregory Warren

Carl Joseph Mies

William Patrick Goodwin

Bruce E Johnson

Warren Eng

Robert Ward James

Arthur Howard Waldie

Thomas J Hammond-Doel

Timothy John Canales

Methods and apparatus for switching Fiber Channel Arbitrated Loop Systems is provided between a plurality of Fiber Channel Loop devices. In one aspect of the invention, the system switches based at least in part on arbitrated loop primitives. An exemplary interconnect system may include a first port and a second port, both including port logic to monitor certain arbitrated loop primitives, a connectivity apparatus, a route determination apparatus including a routing table consisting of ALPA addresses and their associated ports, the route determination apparatus coupled to each port and the connectivity apparatus, where the connectivity apparatus creates paths between the ports based on arbitrated loop primitives. In one embodiment, the connectivity apparatus is a crossbar switch. Examples of the arbitrated loop primitives that cause the switch to create paths between ports includes one or more of the following: ARB, OPN and CLS. In yet other aspects, the system ensures device access fairness through one or more techniques, including a rotating priority system, a counter to count the number of OPNs, especially sequential OPNs, and/or priority based on port type. Device zoning may be implemented. In one implementation, the system includes trunking such that frames may be transferred on multiple ports.

Methods and apparatus for switching fibre channel arbitrated loop devices

Methods and apparatus for switching Fibre Channel Arbitrated Loop Systems is provided between a plurality of Fibre Channel Loop devices. In one aspect of the invention, the system switches based at least in part on arbitrated loop primitives. An exemplary interconnect system may include a first port and a second port, both including port logic to monitor certain arbitrated loop primitives, a connectivity apparatus, a route determination apparatus including a routing table consisting of ALPA addresses and their associated ports, the route determination apparatus coupled to each port and the connectivity apparatus, where the connectivity apparatus creates paths between the ports based on arbitrated loop primitives. In one embodiment, the connectivity apparatus is a crossbar switch. Examples of the arbitrated loop primitives that cause the switch to create paths between ports includes one or more of the following: ARB, OPN and CLS. In yet other aspects, the system ensures device access fairness through one or more techniques, including a rotating priority system, a counter to count the number of OPNs, especially sequential OPNs, and/or priority based on port type. Device zoning may be implemented. In one implementation, the system includes trunking such that frames may be transferred on multiple ports.

Methods and apparatus for device access fairness in fibre channel arbitrated loop systems

Methods and apparatus for trunking in fibre channel arbitrated loop systems

Methods and apparatus for switching fibre channel arbitrated loop systems

A storage cell of an integrated circuit is operable in a radiation environment to capture and store at predetermined time intervals a time sample of a data input signal. A signal representative of the stored data sample for each time interval is generated at an output of the storage cell. At least three data capturing circuits operate to capture and store a time sample of the data input signal at each predetermined time interval, the stored data sample of each circuit being generated correspondingly at an output thereof. Coupled to the outputs of the data capturing circuits is a circuit for generating a signal representative of a stored data sample selected from at least two of the circuit outputs. Also coupled to the data capturing circuits is a circuit for causing each data capturing circuit to capture a different time sample of the input data signal from the other data capturing circuits over each predetermined time interval.

Fault tolerant storage cell

Growing community of inventors

Oak Harbor, WA, United States of America

Michael L White