Magnetic recording and reproducing apparatus and magnetic recording medium
AssigneeKabushiki Kaisha Toshiba
InventorMakoto Asakura
Life of this patent
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Abstract
A magnetic recording and reproducing apparatus extracts a record signal from a sum signal (ADD) of signals detected via first and second magnetic detection regions (RH1, RH2) that are formed to be offset in the lengthwise (TL) and widthwise (TW) directions of a recording track having an overlapping part in the widthwise direction (TW), and extracts servo information from a sub signal (SUB).
Claims19
A magnetic recording and reproducing apparatus to reproduce information magnetically recorded on a recording track formed in a magnetic recording medium, comprising:
- a magnetic head including a first magnetic detection region and a second magnetic detection region which are offset in a lengthwise and widthwise directions of the recording track and have an overlapping part in the widthwise direction;
- a record signal extracting portion to extract the information recorded on the recording track on a basis of a sum of signals detected in the first and second magnetic detection regions, respectively;
- an error signal extracting portion to extract an error signal-of the magnetic head relative to the recording track on a basis of a difference between the signals detected in the first and second magnetic detection regions, respectively;
- and
- a servomechanism to correct positional relation between the recording track and the magnetic head on a basis of the error signal.
A magnetic recording and reproducing apparatus comprising:
- a magnetic recording medium having a recording track and guard bands provided on opposite sides of the recording track, the guard bands having an uniform magnetization direction;
- a magnetic head including a first magnetic detection region and a second magnetic detection region which are offset in a widthwise directions of the recording track;
- a record signal extracting portion to extract the information recorded on the recording track on a basis of a sum of signals detected in the first and second magnetic detection regions, respectively;
- an error signal extracting portion to extract an error signal of the magnetic head relative to the recording track on a basis of a difference between the signals detected in the first and second magnetic detection regions, respectively;
- and
- a servomechanism to correct positional relation between the recording track and the magnetic head on a basis of the error signal.
A magnetic recording medium comprising:
- a recording track made of a first material having relatively low magnetically anisotropic energy;
- and
- guard bands made of a second material having relatively high magnetically anisotropic energy on opposite sides of the recording track, each guard band having an alternate arrangement of first and second regions different in direction of magnetization.
An apparatus for reproducing information recorded on a recording track formed in a magnetic recording medium, comprising:
- a magnetic head including a first detection region for detecting a first signal and a second detection region for detecting a second signal, both regions being offset in a first direction and a second direction of the recording track and being partly overlapped in the second direction;
- a reproducing unit configured to reproduce the information recorded on the recording track by summing the first and second signals;
- and
- a servo control unit configured to generate an error signal for the magnetic head relative to the recording track by obtaining a difference between the first and second signals and configured to control to correct the positional relation between the recording track and the magnetic head based on the error signal.
Dependencies are inferred from the claim text.