MAGNETIC DISK DEVICE
First Claim
Patent Images
1. A magnetic disk device comprising:
- a disk that includes a plurality of tracks and magnetically stores therein data;
a magnetic head that reads and writes data on the tracks;
a voice coil motor that moves the magnetic head to select an arbitrary track from the tracks;
a read/write channel that modulates the data read and written by the magnetic head;
a servo control circuit that controls a position of the tracks;
a controller that includes a micro processing unit and performs control;
an error check and correct circuit that corrects the data;
an interface circuit that connects the magnetic disk device to an external device;
a data writing unit that classifies sectors along one track into a plurality of sector groups and writes to a physical address of each of the sector groups data of a logical address that is different from a logical address corresponding to the physical address in same track; and
a first nonvolatile memory that stores therein a conversion table of the logical address and the physical address.
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Abstract
A magnetic disk device includes a disk that includes a plurality of tracks and magnetically stores therein data; a magnetic head that reads and writes data on the tracks; a data writing unit that classifies sectors along one track into a plurality of sector groups and writes to a physical address of each of the sector groups data of a logical address that is different from a logical address corresponding to the physical address in same track; and a first nonvolatile memory that stores therein a conversion table of the logical address and the physical address.
66 Citations
19 Claims
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1. A magnetic disk device comprising:
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a disk that includes a plurality of tracks and magnetically stores therein data; a magnetic head that reads and writes data on the tracks; a voice coil motor that moves the magnetic head to select an arbitrary track from the tracks; a read/write channel that modulates the data read and written by the magnetic head; a servo control circuit that controls a position of the tracks; a controller that includes a micro processing unit and performs control; an error check and correct circuit that corrects the data; an interface circuit that connects the magnetic disk device to an external device; a data writing unit that classifies sectors along one track into a plurality of sector groups and writes to a physical address of each of the sector groups data of a logical address that is different from a logical address corresponding to the physical address in same track; and a first nonvolatile memory that stores therein a conversion table of the logical address and the physical address. - View Dependent Claims (2, 3, 4, 5, 6, 7, 19)
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8. A magnetic disk device comprising:
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a disk that includes a plurality of tracks and magnetically stores therein data; a magnetic head that reads and writes data on the tracks; a voice coil motor that moves the magnetic head to select an arbitrary track from the tracks; a read/write channel that modulates the data read and written by the magnetic head; a servo control circuit that controls a position of the tracks; a controller that includes a micro processing unit and performs control; an error check and correct circuit that corrects the data; an interface circuit that connects the magnetic disk device to an external device; a data writing unit that classifies the tracks into a plurality of track groups and writes to a physical address of each of the track groups data of a logical address in a different track; and a first nonvolatile memory that stores therein a conversion table of the logical address and the physical address. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A magnetic disk device comprising:
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a disk that includes a plurality of tracks and magnetically stores therein data; a magnetic head that reads and writes data on the tracks; a voice coil motor that moves the magnetic head to select an arbitrary track from the tracks; a read/write channel that modulates the data read and written by the magnetic head; a servo control circuit that controls a position of the tracks; a controller that includes a micro processing unit and performs control; an error check and correct circuit that corrects the data; an interface circuit that connects the magnetic disk device to an external device; a first data writing unit that classifies sectors along one track into a plurality of sector groups and writes to a first physical address of each of the sector groups data of a first logical address that is different from a logical address corresponding to the first physical address in same track; a second data writing unit that classifies the tracks into a plurality of track groups and writes to a second physical address of each of the track groups data of a second logical address in a different track; and a first nonvolatile memory that stores therein a first conversion table of the first logical address and the first physical address and a second conversion table of the second logical address and the second physical address. - View Dependent Claims (16, 17, 18)
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Specification