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Storing parity information for data recovery

  • US 20060047896A1
  • Filed: 08/25/2004
  • Published: 03/02/2006
  • Est. Priority Date: 08/25/2004
  • Status: Active Grant
First Claim
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1. An article of manufacture, wherein a first storage unit at a first site is coupled to a second storage unit at a second site and a third storage unit at a third site, and wherein the article of manufacture is capable of causing operations, the operations comprising:

  • receiving data at the first storage unit;

    dividing the received data into a first part and a second part;

    storing the first part of the data in the first storage unit at the first site;

    distributing the second part of the data to the second storage unit at the second site for storage;

    computing parity data corresponding to the first part of the data and the second part of the data; and

    distributing the parity data to the third storage unit at the third site for storage.

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