Magnetic tape unit
AssigneeFujitsu Limited
InventorsHironao Konishi, Tatsuya Yumioka, Masaharu Tosa, Takanobu Kashiwagi, Yukio Sekiguchi, Tadayoshi Yamamoto, Hiroyuki Miyata
Life of this patent
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Abstract
A magnetic tape unit includes a magnetic tape provided with a plurality of tracks, a magnetic head for writing or reading data from the tape, a position determiner for monitoring the relative position between the tape and the head, and a position compensator for adjusting this relative position. The monitoring by the position determiner is performed based on signals read out from the servo control tracks of the tape. The position compensator keeps the magnetic head and tape in proper positional relation based on the results of the monitoring by the position determiner.
Claims8
A magnetic tape unit comprising:
- a magnetic tape provided with a plurality of servo control tracks and user data tracks accessible for allowing a user to write data, the servo control tracks and the user data tracks being provided on a same side of the tape, the servo control tracks including at least first, second and third servo control tracks, the third servo control track being arranged between the first and the second servo control tracks, each of the servo control tracks being provided with identical pieces of data spaced from each other in a longitudinal direction of the tape, the pieces of data on the first servo control track being aligned with the pieces of data on the second servo control track in a widthwise direction of the tape, the pieces of data on the third servo control track being offset from the pieces of data on the first and the second servo control tracks in the longitudinal direction of the tape;
- a magnetic head arranged to simultaneously access only a smaller number of tracks than all the tracks on said same side of the tape for data-writing and data-reading, the magnetic head having a maximum access width corresponding to a distance by which the first and the second servo control tracks are spaced from each other in the widthwise direction of the tape;
- a relative position determiner for determining a relative positional relation between the magnetic head and the magnetic tape based on signals read out from the first and the second servo control tracks;
- and
- a position compensator for keeping the magnetic head and the magnetic tape in proper positional relation by adjusting the relative positional relation between the head and the tape based on the determination of the relative position determiner.
Dependencies are inferred from the claim text.