1. An information processing equipment capable of being connected to an external storage comprising:
a division processor configured to divide original data into a plurality of sets of divided data;
an internal storage configured to store the divided data;
a storage location selector configured to select the external storage and the internal storage as storage locations for the plurality of sets of divided data and to store the divided data into the selected storage locations; and
a rate measurer configured to write predetermined data in each of the storage locations and to measure a data reading rate andor a data writing rate of the storage location on the basis of the time required to read andor write the predetermined data, wherein:
the division processor is configured to determine a division ratio of divided data between the external storage and the internal storage according to a data reading rate andor a data writing rate of the storage locations selected by the storage location selector, and
wherein the division processor is configured to divide the original data into divided pieces, a number of which is equal to a total number of division ratio, and to distribute the divided pieces according to the division ratio, thereby creating the divided data.
2. The information processing equipment according to claim 1, wherein the divided pieces are divided such that the number of the divided pieces does not exceed a predetermined number.
3. The information processing equipment according to claim 1, wherein the division processor creates divided data by use of a secret distribution method.
4. The information processing equipment according to claim 1, wherein the external storage is connected to the information processing equipment by way of a network.
5. The information processing equipment according to claim 1, wherein, when the determined division ratio is reducible, the division processor is configured to take a reduced division ratio as a division ratio for the original data.
6. The information processing equipment according to claim 1, wherein the division processor is configured to write into headers of the divided data at least identification information about the original data and the number of divided pieces for each of the storage locations where the divided data are stored.
7. An information processing equipment capable of being connected to an external storage comprising:
a division processor configured to divide original data into a plurality of sets of divided data;
an internal storage configured to store the divided data; and
a storage location selector configured to select the external storage and the internal storage as storage locations for the plurality of sets of divided data and to store the divided data into the selected storage locations, wherein:
the division processor is configured to determine a division ratio of divided data between the external storage and the internal storage according to a data reading rate andor a data writing rate of the storage locations selected by the storage location selector,
wherein the division processor is configured to divide the original data into divided pieces, a number of which is equal to a total number of division ratio, and to distribute the divided pieces according to the division ratio, thereby creating the divided data,and
predetermined data are written into each of the storage locations by use of DMA transfer, and a data reading rate andor a data writing rate of the storage locations is measured on the basis of time required to read andor write the predetermined data.
8. The information processing equipment according to claim 7, wherein the divided pieces are divided such that the number of the divided pieces does not exceed a predetermined number.
9. The information processing equipment according to claim 7, wherein the division processor creates divided data by use of a secret distribution method.
10. The information processing equipment according to claim 7, wherein the external storage is connected to the information processing equipment by way of a network.
11. The information processing equipment according to claim 7, wherein, when the determined division ratio is reducible, the division processor is configured to take a reduced division ratio as a division ratio for the original data.
12. The information processing equipment according to claim 7, wherein the division processor is configured to write into headers of the divided data at least identification information about the original data and the number of divided pieces for each of the storage locations where the divided data are stored.
13. An information processing equipment capable of being connected to an external storage comprising:
a division processor configured to divide original data into a plurality of sets of divided data;
an internal storage configured to store the divided data; and
a storage location selector configured to select the external storage and the internal storage as storage locations for the plurality of sets of divided data and to store the divided data into the selected storage locations, wherein:
the division processor is configured to determine a division ratio of divided data between the external storage and the internal storage according to a data reading rate andor a data writing rate of the storage locations selected by the storage location selector,
wherein the division processor is configured to divide the original data into divided pieces, a number of which is equal to a total number of division ratio, and to distribute the divided pieces according to the division ratio, thereby creating the divided data, and
the data reading rate andor the data writing rate for the storage locations, whichever corresponds to a maximum value, a minimum value, an average value, and a latest value of the reading rate andor the writing rate, is acknowledged to the division processor, and
the division processor is configured to create divided data by use of the acknowledged reading rate andor writing rate.
14. The information processing equipment according to claim 13, wherein the divided pieces are divided such that the number of the divided pieces does not exceed a predetermined number.
15. The information processing equipment according to claim 13, wherein the division processor creates divided data by use of a secret distribution method.
16. The information processing equipment according to claim 13, wherein the external storage is connected to the information processing equipment by way of a network.
17. The information processing equipment according to claim 13, wherein, when the determined division ratio is reducible, the division processor is configured to take a reduced division ratio as a division ratio for the original data.
18. The information processing equipment according to claim 13, wherein the division processor is configured to write into headers of the divided data at least identification information about the original data and the number of divided pieces for each of the storage locations where the divided data are stored.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A magnetic memory array comprising a plurality of magnetic memories with respective ring-shaped magnetic layers therein,
said magnetic layers having respective notches formed by partially cutting out peripheries thereof in circular arc shape,
said magnetic memories being arranged in plane so that surfaces of said notches are parallel to one another.
2. The magnetic memory array as defined in claim 1, wherein said surfaces of said notches are set in parallel with a direction of an external magnetic field for recording.
3. The magnetic memory array as defined in claim 2, wherein a right-handed (clockwise) or a left-handed (anticlockwise) longitudinal magnetization is created in at least one of said magnetic layer by said external magnetic field.
4. The magnetic memory array as defined in claim 1, wherein if the height of each notch is defined as \u201ch\u201d and the outer diameter of each magnetic layer is defined as \u201cH1\u201d, ratio (hH1) is set to 0.01 or over.
5. The magnetic memory array as defined in claim 1, wherein each magnetic layer is made of room temperature ferromagnetic material.
6. The magnetic memory array as defined in claim 1, wherein the thickness of each magnetic layer is set within 1\u201310 nm.
7. The magnetic memory array as defined in claim 1, wherein each magnetic memory comprises an additional magnetic layer on each magnetic layer via an non-magnetic layer.
8. The magnetic memory array as defined in claim 7, wherein said additional magnetic layer is made of room temperature ferromagnetic material.
9. The magnetic memory array as defined in claim 7, wherein the thickness of said additional magnetic layer is set within 1\u201310 nm.
10. The magnetic memory array as defined in claim 7, wherein each magnetic memory comprises an antiferromagnetic layer which is formed adjacent to a main surface of said additional magnetic layer opposite to said each magnetic layer.
11. The magnetic memory array as defined in claim 7, wherein in said each magnetic memory, said additional magnetic layer is magnetized right handedly (clockwise) or left handedly (anticlockwise) along a ring-shaped surface thereof.
12. The magnetic memory array as defined in claim 10, wherein the direction of magnetization in said additional magnetic layer is pinned.
13. A method for recording in a magnetic memory array, comprising the steps of:
preparing a plurality of magnetic memories with respective ring-shaped magnetic layers,
partially cutting out peripheries of said magnetic layers in circular arc shape to form respective notches therein,
arranging said magnetic memories so that surfaces of said notches are parallel to one another to form a magnetic memory array, and
applying an external magnetic field to said magnetic memory array to perform a recording operation for said magnetic memory array.
14. The recording method as defined in claim 13, wherein said external magnetic field is applied so as to be parallel to said surfaces of said notches.
15. The recording method as defined in claim 13, wherein a right-handed (clockwise) or a left-handed (anticlockwise) longitudinal magnetization is created in at least one of said magnetic memories.
16. The recording method as defined in claim 13, wherein if the height of each notch is defined as \u201ch\u201d and the outer diameter of each magnetic layer is defined as \u201cH1\u201d, ratio (hH1) is set to 0.01 or over.
17. The recording method as defined in claim 13, wherein said magnetic layers are made of room ferromagnetic material.
18. The recording method as defined in claim 13, wherein the thickness of each magnetic layer is set within 1\u201310 nm.
19. A method for reading out from a magnetic memory array, comprising the steps of:
preparing a plurality of magnetic memories with respective ring-shaped magnetic layers,
partially cutting out peripheries of said magnetic layers in circular arc shape to form respective notches therein,
forming ring-shaped additional magnetic layers on said magnetic layers via non-magnetic layers, respectively,
arranging said magnetic memories so that surfaces of said notches are parallel to one another to form a magnetic memory array, and
applying an external magnetic field to said magnetic memory array to perform a recording operation for said magnetic memory array and create a right-handed (clockwise) or a left-handed (anticlockwise) magnetization in at least one of said magnetic memories,
allotting information \u201c0\u201d or \u201c1\u201d to said right-handed (clockwise) or said left-handed (anticlockwise) magnetization, and
reading out said information \u201c0\u201d or \u201c1\u201d on the change in electric resistance of said at least one of said magnetic memories due to the relative direction in magnetization between said magnetic layer and said additional magnetic layer thereof.
20. The reading out method as defined in claim 19, further comprising the step of forming antiferromagnetic layers which are adjacent to main surfaces of said additional magnetic layers opposite to said magnetic layers to fix magnetizations of said additional magnetic layers, respectively.
21. The reading out method as defined in claim 19, wherein if the height of each notch is defined as \u201ch\u201d and the outer diameter of each magnetic layer is defined as \u201cH1\u201d, ratio (hH1) is set to 0.01 or over.
22. The reading out method as defined in claim 19, wherein said magnetic layers are made of room ferromagnetic material.
23. The reading out method as defined in claim 19, wherein the thickness of each magnetic layer is set within 1\u201310 nm.
24. The reading out method as defined in claim 19, wherein the thickness of each additional magnetic layer is set within 1\u201310 nm.