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Tape duplexing with unique identity and error recovery

  • US 6,111,707 A
  • Filed: 12/31/1997
  • Issued: 08/29/2000
  • Est. Priority Date: 12/31/1997
  • Status: Expired due to Term
First Claim
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1. A method for creating a duplicate copy of a tape comprising:

  • allocating a first tape having a first data set name and a second tape having a second data set name;

    determining if a TCN flag exists indicating that a copy of the first tape needs to be made;

    writing a first buffer to the first tape;

    writing the first buffer to the second tape in a manner that ensures that block for block the data on the second tape is located at the same position as on the first tape;

    checking if the first tape was written without errors;

    checking if the second tape was written without errors;

    checking if an additional buffer needs to be written to the first tape and the second tape; and

    forcing an end of volume condition if there are no additional buffers to be written to the first tape and second tape.

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