Emc Corporation

Daniel Albert Dufresne, Ii

Michael Robillard

John Victor Burroughs

John Kevin Bowman

Daniel Savilonis

Himanshu Agrawal

Sharon Smith

A system having: a midplane having air flow channels therein; a disk drive mounted to a first side of the midplane; and a temperature sensors mounted to the midplane. The system includes a pair of electrical chassis connected to a second side of the midplane. A first one of the chassis has therein: a fan; and a fan controller for controlling speed of the fan in response to a temperature control signal. A second one of the chassis has therein: a microprocessor for: detecting temperature signals produced by the temperature sensors; comparing differences between the detected temperature signals; and selecting one of the detected temperature control signal from the compared differences as the temperature control signal. A faulty one of the temperature sensors is detected by: selecting one of the detected temperature control signal as the faulty one of the plurality of temperature sensors from the compared differences.

Method for controlling cooling in a data storage system

Described is an electronics system having an individually replaceable electronics module installed therein. The individually replaceable electronics module includes a component, a light-emitting device (LED) disposed near the component, a processor module for performing diagnostics on the component and producing a message based on results of the diagnostics, and a microcontroller in communication with the processor module to receive the message produced by the processor module. The microcontroller determines whether the component is faulting based on the message. A DC power source is coupled to supply power to the microcontroller after the individually replaceable electronics module is electrically disconnected from the electronics system so that the microcontroller can illuminate the LED if the received message indicates that the component is faulting.

Light path diagnostics

A data storage system includes a first and second boards disposed in a chassis. The first board has disposed thereon a first Serial Attached Small Computer Systems Interface (SAS) expander, a first management controller (MC) in communication with the first SAS expander, and management resources accessible to the first MC. The second board has disposed thereon a second SAS expander and a second MC. The system also has a communications link between the first and second MCs. Primary access to the management resources is provided in a first path which is through the first SAS expander and the first MC, and secondary access to the first management resources is provided in a second path which is through the second SAS expander and the second MC.

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Bow, NH, United States of America

Daniel Albert Dufresne, Ii