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Data storage systems

  • US 20050117418A1
  • Filed: 08/30/2004
  • Published: 06/02/2005
  • Est. Priority Date: 08/28/2003
  • Status: Abandoned Application
First Claim
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1. An apparatus for use in a data storage subsystem comprising:

  • a volatile memory;

    a nonvolatile memory;

    a temporary power supply for supplying temporary power to the apparatus after interruption of a main power supply to the apparatus;

    means for detecting an interruption in the power supply to the volatile memory;

    means for, in the event of such detection, writing data stored in the volatile memory to the nonvolatile memory using power supplied by the temporary power supply;

    means for determining the state of the temporary power supply; and

    means for determining the amount of data stored in the volatile memory that can be written to the nonvolatile memory using power supplied by the temporary power supply on the basis of the determined state of the temporary power supply.

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