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Storage controller providing store-and-forward mechanism in distributed data storage system

  • US 6,282,610 B1
  • Filed: 01/15/1999
  • Issued: 08/28/2001
  • Est. Priority Date: 03/31/1997
  • Status: Expired due to Term
First Claim
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1. A storage system comprising:

  • a host processing system;

    a plurality of storage arrays located remotely from each other, each of the storage arrays including one or more mass storage devices; and

    a plurality of storage controllers, each of the storage controllers coupled locally to a different one of the storage arrays, the storage controllers coupled to the host processing system and configured to provide the host processing system with access to the plurality of storage arrays;

    wherein each of the plurality of storage controllers internally maintains and updates a change map representing changes to data stored in the storage array coupled locally thereto.

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