US Patent Application 18446637. DATA STORAGE DEVICE HAVING DUAL ACTUATORS AND METHOD FOR EMERGENCY POWER OFF RETRACT (EPOR) OF DUAL ACTUATORS simplified abstract

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DATA STORAGE DEVICE HAVING DUAL ACTUATORS AND METHOD FOR EMERGENCY POWER OFF RETRACT (EPOR) OF DUAL ACTUATORS

Organization Name

Western Digital Technologies, Inc.

Inventor(s)

Brian Johnson of Laguna Hills CA (US)

Jaesoo Byoun of Irvine CA (US)

Gaku Ikedo of Fujisawa-shi (JP)

Hideaki Ito of Fujisawa-shi (JP)

Naoyuki Kagami of Fujisawa-shi (JP)

Hiroki Watanabe of Fujisawa-shi (JP)

DATA STORAGE DEVICE HAVING DUAL ACTUATORS AND METHOD FOR EMERGENCY POWER OFF RETRACT (EPOR) OF DUAL ACTUATORS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18446637 titled 'DATA STORAGE DEVICE HAVING DUAL ACTUATORS AND METHOD FOR EMERGENCY POWER OFF RETRACT (EPOR) OF DUAL ACTUATORS

Simplified Explanation

The patent application describes a data storage device that includes two read-write heads and two disks, each controlled by separate actuators.

  • The device also includes a spindle motor that rotates the disks.
  • In the event of an emergency power off (EPO), a processing device retracts and parks the actuators using a generated internal supply voltage.
  • The processing device also brakes the spindle motor, but only after both actuators have been retracted and parked.


Original Abstract Submitted

A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.

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