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Apparatus and method in a cached raid controller utilizing a solid state backup device for improving data availability time

  • US 20050283648A1
  • Filed: 02/09/2005
  • Published: 12/22/2005
  • Est. Priority Date: 06/21/2004
  • Status: Active Grant
First Claim
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1. A mass storage controller for providing improved data availability, comprising:

  • a volatile memory, for storing posted-write data;

    a non-volatile memory, coupled to said volatile memory, for backing up said posted-write data from said volatile memory, in response to a loss of main power;

    a battery, coupled to supply power to said volatile memory in response to said loss of main power;

    an indicator, for indicating whether said battery continued to supply power to said volatile memory until said main power was restored; and

    control logic, coupled to said indicator, configured to forego restoring said posted-write data to said volatile memory from said non-volatile memory in response to said main power being restored, if said indicator indicates said battery continued to supply power to said volatile memory until said main power was restored.

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