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Storage system using flash memory modules logically grouped for wear-leveling and raid

  • US 20080276038A1
  • Filed: 07/02/2008
  • Published: 11/06/2008
  • Est. Priority Date: 03/29/2006
  • Status: Active Grant
First Claim
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1. A storage system using flash memories comprising a controller and plural flash memory modules as storage media,wherein each flash memory module comprises at least one flash memory chip, andwherein the controller:

  • combines a group of the flash memory modules into a first logical group,translates a first address used for accessing the flash memory modules belonging to the first logical group to a second address used for handling the first address in the controller,combines a plurality of first logical groups into a second logical group,executes a first process of leveling erase counts of blocks belonging to the flash memory chip, andexecutes a second process of leveling erase counts of the logical groups.

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