Apparatus and method for controlling storage device
First Claim
1. A method for controlling a transmission of data from a first storage device to a second storage device, said first storage device including a recording unit for recording said data, a buffer for temporarily storing said data read from the recording unit, and a transmission unit for transmitting said data read from the buffer, said method comprising:
- determining that sufficient buffer space in the buffer is not available for said transmission of said data in a predetermined time interval;
responsive to said detecting that said buffer space is not available, ascertaining whether a transmission error exists in a communication line connecting the first storage device to the second storage device;
if said ascertaining ascertains that said transmission error exists, then controlling the transmission unit to not perform said transmission of said data from the first storage device;
if said ascertaining ascertains that said transmission error does not exist, then not controlling the transmission unit to not perform said transmission of said data from the first storage device.
1 Assignment
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Accused Products
Abstract
A method and apparatus for controlling a transmission of data from a first storage device to a second storage device. The first storage device includes a recording unit for recording the data, a buffer for temporarily storing the data read from the recording unit, and a transmission unit for transmitting the data read from the buffer. It is determined that sufficient buffer space in the buffer is not available for the transmission of the data in a predetermined time interval. It is ascertained whether a transmission error exists in a communication line connecting the first storage device to the second storage device. If the transmission error exits, then the transmission unit is controlled to not perform the transmission of the data from the first storage device; otherwise the transmission unit is not controlled to not perform the transmission of the data from the first storage device.
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Citations
20 Claims
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1. A method for controlling a transmission of data from a first storage device to a second storage device, said first storage device including a recording unit for recording said data, a buffer for temporarily storing said data read from the recording unit, and a transmission unit for transmitting said data read from the buffer, said method comprising:
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determining that sufficient buffer space in the buffer is not available for said transmission of said data in a predetermined time interval;
responsive to said detecting that said buffer space is not available, ascertaining whether a transmission error exists in a communication line connecting the first storage device to the second storage device;
if said ascertaining ascertains that said transmission error exists, then controlling the transmission unit to not perform said transmission of said data from the first storage device;
if said ascertaining ascertains that said transmission error does not exist, then not controlling the transmission unit to not perform said transmission of said data from the first storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program product, comprising a computer-readable recording medium in which a computer readable program is stored, said program being adapted to be executed on a computer to perform a method for controlling a transmission of data from a first storage device to a second storage device, said first storage device including a recording unit for recording said data, a buffer for temporarily storing said data read from the recording unit, and a transmission unit for transmitting said data read from the buffer, said method comprising:
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determining that sufficient buffer space in the buffer is not available for said transmission of said data in a predetermined time interval;
responsive to said detecting that said buffer space is not available, ascertaining whether a transmission error exists in a communication line connecting the first storage device to the second storage device;
if said ascertaining ascertains that said transmission error exists, then controlling the transmission unit to not perform said transmission of said data from the first storage device;
if said ascertaining ascertains that said transmission error does not exist, then not controlling the transmission unit to not perform said transmission of said data from the first storage device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 20)
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15. An apparatus comprising a computer for executing a computer readable program to perform a method for controlling a transmission of data from a first storage device to a second storage device, said first storage device including a recording unit for recording said data, a buffer for temporarily storing said data read from the recording unit, and a transmission unit for transmitting said data read from the bluffer, said method comprising:
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determining that sufficient buffer space in the buffer is not available for said transmission of said data in a predetermined time interval;
responsive to said detecting that said buffer space is not available, ascertaining whether a transmission error exists in a communication line connecting the first storage device to the second storage device;
if said ascertaining ascertains that said transmission error exists, then controlling the transmission unit to not perform said transmission of said data from the first storage device;
if said ascertaining ascertains that said transmission error does not exist, then not controlling the transmission unit to not perform said transmission of said data from the first storage device. - View Dependent Claims (16, 17, 18, 19)
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Specification