Emc Corporation

Emc IP Holding Company LLC

Robert M Beauchamp

Joseph P King

Phillip John Roux

Michael Robillard

John Victor Burroughs

James W Espy

John Kevin Bowman

Steven R Cieluch

David Boudreau

Robert A Guenther

Michael A Faulkner

Steven D Sardella

Douglas Sullivan

Jason Pritchard

Himanshu Agrawal

Gordon A Frye

David F Ouellette

Samuel Zeman

Bassem Bishay

Kenneth Fife

A system for detecting latent defects within a redundant power architecture includes a plurality of redundant power supplies, each having one or more output power rails, connected in a redundant fashion to a system load; each power supply output having fault-isolating OR'ing circuitry that prevents reverse current flow when free of defects; each power supply having means for adjusting its output voltage; each power supply having means for monitoring an internal voltage therein, and, based on characteristics of the monitored internal voltage, determining the presence of latent defect/s in the fault-isolating 'OR'ing' circuitry. Further, the system operates to shift the load demanded from power supplies in redundant power architectures to allow the power supplies to run at their optimum electrical efficiency.

Method and apparatus for performing power supply self-diagnostics in redundant power architectures

A method and computer program product for determining an internal temperature of a computing device, a power consumption factor for the computing device, and an airflow factor for the computing device. An approximated ambient air temperature is generated based upon the internal temperature, power consumption factor, and the airflow factor. A workload factor is determined for the computing device and a fan speed for the computing device is controlled based at least in part upon the approximated ambient air temperature and the workload factor.

System and method for controlling fan speed

A data storage system includes a first storage processor including a first memory device; a second storage processor including a second memory device; and a third memory device coupled to the first storage processor and the second storage processor. The first and second storage processors are interconnected to enable mirroring of data between the first memory device and the second memory device. During a first mode of operation, data processed by the first storage processor and the second storage processor is mirrored between the first memory device and the second memory device and, during a second mode of operation, data processed by the first storage processor is mirrored from the first memory device to the third memory device.

System for caching data

A data preservation device includes a circuit board configured to be positioned within a memory module slot of a computing device and releasably engage a memory bus of the computing device. A non-volatile memory storage device is electrically coupled to the circuit board. A control circuit is electrically coupled to the circuit board and is configured to read a data portion from the computing device and write the data portion to the non-volatile memory storage device during the occurrence of a power failure event on the computing device. An independent power supply is configured to power the data preservation device during the power failure event.

Data preservation system and method

A method and computer program product for determining an internal temperature of a computing device, a power consumption factor for the computing device, and an airflow factor for the computing device. An approximated ambient air temperature is generated based upon the internal temperature, power consumption factor, and the airflow factor.

System and method for approximating ambient temperature

A cooling system includes a fan unit having a terminal receiving a signal representative of a commanded fan speed and a terminal for receiving a signal representative of actual fan speed. A system controller is responsive to temperature and the actual fan speed, for producing control signals for fan to adjust fan speed in accordance with the temperature and the actual fan speed, for producing the control signals in one of a plurality of different predetermined two-wire communication protocols. The system includes a fan controller and a two-line communication bus coupling the control signals between the system controller and the fan controller. The fan controller detects the one of the plurality of predetermined two-wire communication protocols on the two-wire communication bus and provides, in accordance with such detection, one terminal of the fan unit with the commanded fan speed and transmits the signal representative of the actual fan speed to the system controller via the communication bus.

Cooling system with adaptive protocol cooling unit

A fan power supply system having a pair of voltage supplies, one producing a higher voltage than the other. A switch selects one of the voltage supplies in response to a control signal. A DC/DC converter is connected to the selected one of the voltage supplies for producing a current greater than current fed to the DC/DC converter by the selected one of the voltage supplies. A fan is fed by the current produced by the DC/DC converter. The fan produces a train of pulses representative of the rotational speed of the fan. A microcontroller encodes the train of pulses produced by the fan as a function of whether the selected one of the pair of voltages has the higher voltage or the lower voltage. A decoder produces the control signal in accordance with the encoding by the microcontroller.

Fan power supply system

A system has a Serial ATA device and a subsystem. The subsystem includes multiple hosts, and a communications medium which interconnects the hosts to the device. The hosts are configured to share control of the device through the communications medium. First and second hosts, when transitioning control of the device, are configured to (i) send a sleep command from the first host to the device, the sleep command directing the device to transition from a normal operating mode to a sleep mode, (ii) provide a notification signal from the first host to the second host, the notification signal indicating that the first host has released control of the device to the second host, and (iii) send a wake command from the second host to the device in response to the notification signal, the wake command directing the device to transition from the sleep mode to the normal operating mode.

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Milford, MA, United States of America

Robert M Beauchamp