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Power failure management in disk drives

  • US 9,390,749 B2
  • Filed: 07/07/2015
  • Issued: 07/12/2016
  • Est. Priority Date: 12/09/2011
  • Status: Active Grant
First Claim
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1. A disk drive comprising:

  • a disk;

    a head configured to write data to the disk;

    a microactuator configured to actuate the head;

    an interface operable to receive a host supply voltage;

    a power storage device configured to store a backup voltage;

    a voltage booster configured to receive the host supply voltage at a voltage booster input and generate a boosted host supply voltage; and

    control circuitry configured to, in response to a power failure event;

    disconnect the voltage booster input from the host supply voltage and connect the voltage booster input to the backup voltage;

    generate a boosted backup voltage using the voltage booster; and

    power the microactuator using the boosted backup voltage.

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