Space management for managing high capacity nonvolatile memory

  • US 6,262,918 B1
  • Filed: 06/30/2000
  • Issued: 07/17/2001
  • 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 within 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. selecting at least two blocks within a particular ‘

    super’

    block, said at least two selected blocks including a first selected block located in a first nonvolatile memory device and a second selected block located in a second nonvolatile memory device for erasure of the particular ‘

    super’

    block; and

    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;

    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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