Apparatus for controlling writing data and method for the same
First Claim
1. An apparatus for controlling writing data to a tape medium, comprising:
- a movement control unit that, even when a moving operation of the tape medium is instructed to locate a head to a position specified on the tape medium, performs control to suspend the moving operation of the tape medium if the specified position satisfies a predetermined condition; and
a writing unit that, when an instruction to write data to the tape medium is issued while the moving operation is suspended under the control of the movement control unit, writes the data to a storage unit, the data in the storage unit being assigned to be written to the specified position on the tape medium, the storage unit being a buffer and enabling the writing to be ready to perform within a shorter time than a time required for the moving operation.
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Accused Products
Abstract
In a controller of a tape drive, when a command processor receives a command for moving to the end of data (“EOD”) or the like, an operation signal output unit suspends the moving of a tape and a cartridge memory (“CM”) input/output unit stores therein a state of the tape in which the moving has been omitted. Then, when the command processor receives a command for writing data in this state, the CM input/output unit writes the data to a cartridge memory. Subsequently, for example, when a head passes a proper position at which the data should be actually written to the tape, the CM input/output unit reads the data from the cartridge memory, and the channel input/output unit writes the data to the tape at the proper position.
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Citations
19 Claims
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1. An apparatus for controlling writing data to a tape medium, comprising:
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a movement control unit that, even when a moving operation of the tape medium is instructed to locate a head to a position specified on the tape medium, performs control to suspend the moving operation of the tape medium if the specified position satisfies a predetermined condition; and a writing unit that, when an instruction to write data to the tape medium is issued while the moving operation is suspended under the control of the movement control unit, writes the data to a storage unit, the data in the storage unit being assigned to be written to the specified position on the tape medium, the storage unit being a buffer and enabling the writing to be ready to perform within a shorter time than a time required for the moving operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling writing data to a tape medium, comprising the steps of:
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when a moving operation of the tape medium is instructed to locate a head to a first position on the tape medium, omitting the moving operation; and writing first data to a storage unit, the data in the storage unit being assigned to be written to the first position on the tape medium when an instruction to write the first data to the tape medium is issued while the moving operation is being omitted, the storage unit being a buffer and enabling the writing to be ready to perform within a shorter time than a time required for the moving operation. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer program product on a physical non-transitory computer-readable medium for controlling writing data to a tape medium, the product comprising:
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computer code for suspending a moving operation of the tape medium that has been instructed to locate a head to a position specified on the tape medium if the specified position satisfies a predetermined condition; and computer code for writing data to a storage unit, the data in the storage unit being assigned to be written to the specified position on the tape medium when an instruction to write data to the tape medium is issued while the moving operation is suspended, the storage unit being a buffer and enabling the writing to be ready to perform within a shorter time than a time required for the moving operation. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A tape cartridge for use with a tape drive, comprising:
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a tape medium to which data is to be written; and a storage unit which enables writing to be ready to perform within a shorter time than a time required for a moving operation of the tape medium for locating a head to a position specified on the tape medium, and stores data instructed to be written to the tape medium, the data being assigned to be written to the specified position, while the moving operation is being omitted.
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Specification