APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM
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Accused Products
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.
1 Citation
45 Claims
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1-21. -21. (canceled)
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22. An apparatus of controlling transportation of a tape medium during data writing to the tape medium, comprising:
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a buffer; a controller that performs operations, the operations comprising; calculating a first time to write data at a first tape speed level from a tape speed table and considering a first time required to execute a backhitch at the first tape speed level; calculating a second time to write data at a second tape speed level from the tape speed table and considering a second time required to execute a backhitch at the second tape speed level; and using the first tape speed level for operations in response to the second time to write data being less than the first time to write data. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 33, 41)
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30. 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:
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calculating a first time to write data at a first tape speed level from a tape speed table and considering a first time required to execute a backhitch at the first tape speed level; calculating a second time to write data at a second tape speed level from the tape speed table and considering a second time required to execute a backhitch at the second tape speed level; and using the first tape speed level for operations in response to the second time to write data being less than the first time to write data. - View Dependent Claims (31, 32, 34, 35, 36, 37)
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38. A method of controlling transportation of a tape medium during data writing from a buffer to the tape, comprising:
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calculating a first time to write data at a first tape speed level from a tape speed table and considering a first time required to execute a backhitch at the first tape speed level; calculating a second time to write data at a second tape speed level from the tape speed table and considering a second time required to execute a backhitch at the second tape speed level; and using the first tape speed level for operations in response to the second time to write data being less than the first time to write data. - View Dependent Claims (39, 40, 42, 43, 44, 45)
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Specification