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Method, apparatus and program for migrating between striped storage and parity striped storage

  • US 7,206,991 B2
  • Filed: 10/15/2003
  • Issued: 04/17/2007
  • Est. Priority Date: 10/15/2003
  • Status: Expired due to Fees
First Claim
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1. A method for migrating from a non-mirrored, striped storage array that does not use parity to a parity striped storage array, the method comprising:

  • adding an additional new functioning drive to existing functioning drives of the non-mirrored, striped storage array to form the parity striped storage array;

    for each row in the parity striped storage array, performing the following steps;

    reading data from the existing drives;

    calculating a parity stripe position for the row;

    calculating a parity for the row;

    determining whether the parity stripe position is in one of the existing drives;

    responsive to determining that the parity stripe position is in one of the existing drives;

    writing data from the one of the existing drives that includes the parity stripe position to the new drive; and

    writing the parity to the one of the existing drives that includes the parity stripe position.

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