Storage Technology Corporation

International Business Machines Corporation

Wayne K Cook

Michael Vaughn Konshak

Dale Robert Eichel

Jimmy R Fechner

Philip James Windholz

A data storage assembly having multiple disk drives disposed on a replaceable module. Multiple modules are connected to a single chassis having a back plane with a plurality of connectors, each of which are adapted to receive a connector of one of the modules.

Modular multiple disk drive apparatus

An AC transfer switch is provided for switching between a first line cord and a second line cord. The AC transfer switch is designed to be fault tolerant and ensures that continuous operating power is supplied to a load during the transfer process. The system includes a first input from a first power line cord, a second input from a second power line cord, a switch for switching an output between the first and second power line cord, wherein the switch further includes a first contactor set for selecting the first line cord and a second contactor set for selecting the second line cord, the first and second contactor sets including two contactors in series and a control circuit for controlling the switch to select between the first and second power line cords. The system further includes a first auxiliary contactor circuit associated with the first contactor set and a second auxiliary contactor circuit associated with the second contactor set, the first auxiliary contactor circuit preventing the second contactor set from selecting the second power line cord when the first contactor set is selecting the first line cord.

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Louisville, CO, United States of America

Wayne K Cook