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Hybrid drive copying disk cache to non-volatile semiconductor memory

  • US 8,782,334 B1
  • Filed: 08/10/2011
  • Issued: 07/15/2014
  • Est. Priority Date: 09/10/2010
  • Status: Active Grant
First Claim
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1. A hybrid drive comprising:

  • a disk comprising a plurality of data sectors;

    a head actuated over the disk;

    a non-volatile semiconductor memory (NVSM) comprising a plurality of memory segments;

    control circuitry operable to;

    define a disk cache comprising a first plurality of the data sectors;

    define a non-cache area of the disk comprising a second plurality of the data sectors;

    receive a write command from a host, the write command comprising data;

    write the data to the disk cache; and

    copy the data from the disk cache to the NVSM.

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