Apparatus and method for controlling transportation of tape medium
AssigneeInternational Business Machines Corporation
InventorsTakashi Katagiri, Yuhko Mori, Yutaka Oishi
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Abstract
An apparatus, computer readable medium device, and method for controlling transportation of a tape medium. A determination is made whether to execute a backhitch operation in response to writing a data set to tape from the buffer. If not, a determination is made whether a transaction size at which data is transferred from the buffer to the tape is less than a buffer size. If so, then a determination is made of a a new speed and whether a current speed is different from the determined new speed. If so, then a backhitch is initiated.
Claims21
An apparatus of controlling transportation of a tape medium during data writing to the tape medium, comprising:
- a buffer;
- a controller that performs operations, the operations comprising:
- determining whether a high data rate mode is indicated;
- determining whether to execute a backhitch operation or writing data without a backhitch in response to determining that the high data rate mode is indicated;
- and
- executing the backhitch operation in response to determining that the high data rate mode is not indicated.
A computer readable medium device including a program executed to control transportation of a tape medium during data writing from a buffer to the tape medium and perform operations, the operations comprising:
- determining whether a high data rate mode is indicated;
- determining whether to execute a backhitch operation or writing data without a backhitch in response to determining that the high data rate mode is indicated;
- and
- executing the backhitch operation in response to determining that the high data rate mode is not indicated.
A method of controlling transportation of a tape medium during data writing from a buffer to the tape, comprising:
- determining whether a high data rate mode is indicated;
- determining whether to execute a backhitch operation or writing data without a backhitch in response to determining that the high data rate mode is indicated;
- and
- executing the backhitch operation in response to determining that the high data rate mode is not indicated.
Dependencies are inferred from the claim text.