The second controller receives the message from the shared memory element, the message notifying the second controller of an imminent failure of the first controller. In such transition, the first controller transmits a message to a memory element shared by the first and second controllers, the message capable of notifying the second controller of an imminent failure of the first controller. Patent and Trademark Office states: “ Described herein are methods for transitioning control between a first and second controller of a storage system. The abstract of the patent published by the U.S. Nimble Storage, Inc., San Jose, CA, has been assigned a patent ( 9,594,614) developed by Gupta, Vikas, Santa Clara, CA, Tripathi, Ashutosh, Union City, CA, Fozard, Bob, Los Gatos, CA, and Barszczak, Tomasz, Palo Alto, CA, for a “ methods for transitioning control between two controllers of a storage system. Transitioning control between two controllers of storage system The patent application was filed on Octo(14/927,868). Additionally, the method includes an operation for allocating the CPU cycles and disk IOs to the processing task and to the generating task based on their respective first weight and second weight.“ Further, the method includes an operation for dynamically adjusting the second weight based on the current resource utilization in the storage system. One method includes operations for assigning a first weight to a processing task that increases resource utilization of a resource for processing incoming input/output, (IO) requests, and for assigning a second weight to a generating task that decreases the resource utilization of the resource. Patent and Trademark Office states: “ Methods, systems, and computer programs are presented for allocating CPU cycles and disk Input/Output’s, (IOs) to resource-creating processes based on dynamic weights that change according to the current percentage of resource utilization in the storage device. Nimble Storage, Inc., San Jose, CA, has been assigned a patent ( 9,600,337 ) developed by Karaje, Gurunatha, Barszczak, Tomasz, Buca, Vanco, Gulati, Ajay, and Maheshwari, Umesh, San Jose, CA, for a “ congestion avoidance in network storage device using dynamic weights. Congestion avoidance in network storage device using dynamic weights
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