Seagate Technology Incorporated

Paul E Dienstbier

June Christian Ang

Shuang Quan Min

Tze Ming Jimmy Pang

Kian Keongh Ooi

An apparatus and associated methodology for retracting a first member in relation to a second member. The first member may be selectively moveable by a first motor and the second member may be selectively moveable by a second motor that operably generates a back electromagnetic force (BEMF) voltage V. In an embodiment a retract control circuit may control movement of the first member via the first motor in response to a loss of supply power to the second motor. An embodiment of the apparatus may include a backup power source storing a voltage Vafter the loss of supply power. Another embodiment of the apparatus may include retract logic operative on the retract control circuit to divide the Vfrom the Vto energize the first motor by the Vand not the Vwhen the Vis greater than a predetermined threshold voltage and a loss of the supply power to the second motor is detected.

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Boulder, CO, United States of America

Paul E Dienstbier