Data accessing method, device in which the data accessing method is executed and recording medium
First Claim
1. A data accessing apparatus for writing/reading data to a recording medium in which the data is written per data size that can be increased and decreased stepwise, a data transfer efficiency at writing the data is variable depending on the data size, and a parameter showing the data transfer efficiency at writing the data per the data size is recorded, comprising:
- a device for issuing a parameter acquisition command to the recording medium;
a device for selecting an optimum data size at writing the data by collating the parameter transmitted by the recording medium which received the parameter acquisition command with the data transfer efficiency required in the data to be written/read by the data accessing apparatus; and
a device for writing/reading the data with respect to the recording medium based on the selected optimum data size.
2 Assignments
0 Petitions
Accused Products
Abstract
[OBJECT] To guarantee a data transfer rate irrespective of a performance of a memory card. [SOLVING MEANS]
A parameter to show a data transfer efficiency is previously recorded in a recording medium 101 in which data is written per data size that can be increased and decreased stepwise and the data transfer efficiency is variable in accordance with the data size. Next, a data accessing apparatus 105 issues a parameter acquisition command to the recording medium 101. The recording medium 101 which received the parameter acquisition command transmits the parameter. The data accessing apparatus 105 collates the received parameter with the data transfer efficiency required in the data to be written/read to thereby select an optimum data size. Then, the data accessing apparatus 105 writes/reads the data to the recording medium 101 based on the selected optimum data size.
356 Citations
18 Claims
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1. A data accessing apparatus for writing/reading data to a recording medium in which the data is written per data size that can be increased and decreased stepwise, a data transfer efficiency at writing the data is variable depending on the data size, and a parameter showing the data transfer efficiency at writing the data per the data size is recorded, comprising:
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a device for issuing a parameter acquisition command to the recording medium;
a device for selecting an optimum data size at writing the data by collating the parameter transmitted by the recording medium which received the parameter acquisition command with the data transfer efficiency required in the data to be written/read by the data accessing apparatus; and
a device for writing/reading the data with respect to the recording medium based on the selected optimum data size. - View Dependent Claims (2, 3, 4, 5)
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6. A data accessing apparatus for writing/reading data to a recording medium in which the data is written per data size that can be increased and decreased stepwise, a data transfer efficiency at writing the data is variable depending on the data size, and a parameter showing the data transfer efficiency at writing the data per the data size is recorded, comprising:
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a device to transmitting an information showing the necessary data transfer efficiency required in the data to be written/read by the data accessing apparatus; and
a device to set the data size at writing the data based on an information showing an optimum data size transmitted by the recording medium which received the information showing the required data transfer efficiency so as to write/read the data to the recording medium based on the set data size. - View Dependent Claims (7, 8, 9, 10)
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11. A data accessing method wherein the data accessing apparatus writes/reads data to a recording medium in which the data is written per data size that can be increased and decreased stepwise and a data transfer efficiency at writing the data is variable in accordance with the data size, comprising:
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a step in which a parameter showing the data transfer efficiency is previously recorded into the recording medium at writing the data into the recording medium per the data size;
a step in which the data accessing apparatus transmits a parameter acquisition command to the recording medium at writing/reading the data;
a step in which the recording medium that received the parameter acquisition command transmits the parameter to the data accessing apparatus;
a step in which the data accessing apparatus that received the parameter collates the parameter with the data transfer efficiency required in the data to be written/read by the data accessing apparatus to thereby set an optimum data size at writing the data; and
a step in which the data accessing apparatus writes/reads the data between itself and the recording medium based on the set optimum data size. - View Dependent Claims (12, 13, 14)
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15. A data accessing method wherein the data accessing apparatus writes/reads data to a recording medium in which the data is written per data size that can be increased and decreased stepwise and a data transfer efficiency at writing the data is variable in accordance with the data size, comprising:
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a step in which a parameter showing the data transfer efficiency is previously recorded into the recording medium at writing the data into the recording medium per the data size;
a step in which the data accessing apparatus transmits an information to show the data transfer efficiency required in the data to be written/read by the data accessing apparatus to the recording medium at writing the data;
a step in which the recording medium that received the information to show the required data transfer efficiency collates the information concerned with the parameter to thereby select an optimum data size at writing the data;
a step in which the recording medium transmits an information to show the selected optimum data size to the data accessing apparatus; and
a step in which the data accessing apparatus that received the information to show the optimum data size sets the data size at writing the data based on the information showing the optimum data size to thereby write/read the data between itself and the recording medium. - View Dependent Claims (16, 17, 18)
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Specification