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Journaling technique for write transactions to mass storage

  • US 7,240,235 B2
  • Filed: 03/13/2002
  • Issued: 07/03/2007
  • Est. Priority Date: 03/13/2002
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • writing blocks of data from a plurality of servers to an array of disks shared in common by the servers; and

    prior to the writing of each block of data to the array of disks, storing in a journal a copy of said each block of data to be written to the array of disks and storing headers in the journal, wherein the act of storing the headers comprises storing a first header before the storing of the copy and storing a second header identical to the first header after the storing of the copy such that the first and second headers indicate that the copy was successfully stored if the first and second headers are the same.

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