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System and method for reducing data loss in disk arrays by establishing data redundancy on demand

  • US 20050091452A1
  • Filed: 10/28/2003
  • Published: 04/28/2005
  • Est. Priority Date: 10/28/2003
  • Status: Abandoned Application
First Claim
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1. A method for reliably storing data on disks, said method comprising:

  • writing a data block to be stored in a disk array;

    combining an address of said data block to a set of retrievable addresses;

    periodically computing a function of said data stored in said disk array;

    storing the computed function on at least one spare disk;

    on a disk failure in said disk array, updating the computed function using said set of retrievable addresses to recompute only altered portions of said function; and

    deleting said set of retrievable addresses.

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