Magnetic recording/reproducing device
View Patent ↗The invention relates to a magnetic recording/reproducing device in which a reproduce head is positioned where the crosstalk between adjacent tracks in a magnetic disk is minimized to maintain an adequate transfer rate in a system involving great crosstalk. The removal of crosstalk ensures the reproduction of the recorded data and thus increases the reliability of the magnetic recording/reproducing device. The magnetic recording/reproducing device according to this invention includes a magnetic disk on which a plurality of tracks are concentrically formed, and data are recorded at different frequencies on adjacent tracks.
1. A magnetic recording/reproducing apparatus including a magnetic recording media forming a plurality of tracks concentrically, wherein
a write frequency differs between adjacent tracks in the plurality of tracks,
the magnetic recording media form concentrically the plurality of tracks each having data sectors having a PLL pattern and a data area, wherein signal components of the data write frequencies of a read-purposed track and the adjacent tracks of the read-purposed track are extracted from a read back signal of the PLL pattern, and wherein a crosstalk amount is detected from the adjacent tracks,
the read-purposed track and both tracks adjacent to the read-purposed track are reproduced, wherein a crosstalk component is estimated in accordance with the crosstalk amount of the adjacent tracks and read back signals of the adjacent tracks, and wherein the crosstalk component is subtracted from a read back signal of the read-purposed track, reducing the crosstalk from the adjacent tracks, and
a processing to reduce the crosstalk is performed by use of values of previously determined levels as a crosstalk amount necessary for reducing the crosstalk, and wherein when the reproduction is unable, the processing to reduce the crosstalk is performed by use of values of other crosstalk levels to perform the reproduction.
2. The magnetic recording/reproducing apparatus according to claim 1 , wherein a read head position control is performed so that crosstalk from the adjacent tracks is small for a signal of the read-purposed track.
3. The magnetic recording/reproducing apparatus according to claim 2 , wherein when data straddling over a plurality of tracks is recorded, recording is sequentially performed for the tracks corresponding to an identical write frequency.