Emc Corporation

Emc IP Holding Company LLC

Michael A Faulkner

Phillip John Roux

Joseph P King

Paul H Maier, Jr

Robert M Beauchamp

Robert A Guenther

Stephen Edward Strickland

Steven D Sardella

John Victor Burroughs

Timothy Dorr

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 data storage system includes a disk drive array including a plurality of disk drives; a first storage processor for controlling the operation of the data storage system; a second storage processor for controlling the operation of the data storage system; a first arbiter for controlling communication of data from the first storage processor and the second storage processor to a first group of disk drives of the disk drive array; and a second arbiter for controlling communication of data from the first storage processor and the second storage processor to a second group of disk drives of the disk drive array. Selected data is redundantly stored on disk drives in the first group of disk drives and the second group of disk drives, such that, upon failure of the first arbiter, the selected data is available to the first storage processor and the second storage processor through the second arbiter.

High availability data storage system

A power supply system includes a power supply; a load coupled to the power supply via a power supply line to receive a voltage therefrom; and a circuit protection device. The circuit protection device includes at least one switch device coupled between the power supply and the load on the power supply line; a first controller coupled to the at least one switch for: A. monitoring current flow through the at least one switch; B. maintaining the at least one switch in an ON state while current flows through the at least one switch in a first direction; and C. causing the at least one switch to toggle to an OFF state if current flowing through the at least one switch flows in a second direction and a second controller coupled to the power supply line between the power supply and the at least one switch and coupled to the at least one switch for sensing an amount of current flowing between the power supply and the at least one switch and causing the at least one switch to toggle to the OFF state when the current sensed by the second controller exceeds a reference value.

Method and system for providing fault protection in a power supply system

A data storage system includes a disk drive assembly having a plurality of disk drives, a first processor for controlling access to the disk drive assembly, a second processor for controlling access to the disk drive assembly, a first power supply for supplying power to the first processor and to the disk drive assembly and a second power supply for supplying power to the second processor and to the disk drive assembly.

Method and system for providing redundant power to a disk drive system

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Grafton, MA, United States of America

Michael A Faulkner