Space management for managing high capacity nonvolatile memory

  • US 6,134,151 A
  • Filed: 03/06/2000
  • Issued: 10/17/2000
  • Est. Priority Date: 04/01/1999
  • Status: Expired due to Term
First Claim
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1. A method for use in a digital system having a host coupled to at least two nonvolatile memory devices, the host for storing digital information in the nonvolatile memory devices and reading the stored digital information from the nonvolatile memory devices, the memory devices being organized into blocks of sectors of information, the method for erasing digital information stored in the blocks of the nonvolatile memory devices and comprising:

  • a. assigning a predetermined number of blocks, in sequential order, to each of the nonvolatile memory devices, each block having a predetermined number of sectors;

    b. forming `super` blocks, each `super` block comprising a plurality of blocks;

    c. identifying a particular `super` block having at least two blocks, a first block being located in a first nonvolatile memory device and a second block being located in a second nonvolatile memory device for erasure of the particular `super` block;

    d. erasing the first and second selected blocks of the particular `super` block so that erasure of the second block is performed without waiting for completion of the erasure of the first block; and

    e. indicating the status of the first and second nonvolatile memory devices to be busy during erasure of the first and second selected blocks,wherein the speed of erase operations in the digital system is substantially increased thereby increasing the overall performance of the digital system.

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