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Generated January 20, 2018

System and method of operation of dual redundant controllers

Patent Number: 6,845,467

Patent Information

Abstract
A system and method for the switching of control between redundant controllers is presented. The status of the redundant controllers is monitored to determine if switching of control between controllers is required. The monitoring and switching system is hardware based with control being implemented via a state machine.
Patent Number: 6,845,467
Issue Date: 2005-01-18

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Biographical Information

Executive Summary

Summary

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Citations

Patents cited by this patent

Patent Title
6,643,795 Controller-based bi-directional remote copy system with storage site failover capability
6,640,314 Redundant automation system
6,587,970 Method and apparatus for performing site failover
6,578,158 Method and apparatus for providing a raid controller having transparent failover and failback
6,351,829 System and method for distinguishing a device failure from an inter-device communication failure
6,169,726 Method and apparatus for error free switching in a redundant duplex communication carrier system
6,058,491 Method and system for fault-handling to improve reliability of a data-processing system
6,038,684 System and method for diagnosing errors in a multiprocessor system
5,974,565 Composite computer system
5,968,185 Transparent fault tolerant computer system
5,966,305 Control system having effective error detection capabilities
5,958,069 Apparatus for preventing malfunction at time of duplex unit failure
5,951,683 Multiprocessor system and its control method
5,752,047 Modular solid state power controller with microcontroller

Patents that cite this patent

Patent Title
9,031,676 Actuator control system
8,207,814 Kit and system for providing security access to a door using power over ethernet with data persistence and fire alarm control panel integration
8,006,129 Detecting and preventing the split-brain condition in redundant processing units
7,979,739 Systems and methods for managing a redundant management module
7,870,417 Apparatus, system, and method for adapter card failover
7,850,127 Cab signal receiver demodulator employing redundant, diverse field programmable gate arrays
7,600,157 Recovering from a failed I/O controller in an information handling system
7,505,820 Backup control for solid state power controller (SSPC)
7,480,831 Method and apparatus for recovering from a failed I/O controller in an information handling system
7,330,996 Twin-tailed fail-over for fileservers maintaining full performance in the presence of a failure
7,171,524 Storage control system and control method for storage control which suppress the amount of power consumed by the storage control system

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