JPH0246502A - Access system for track width variable type magnetic recording medium - Google Patents

Abstract

PURPOSE:To cope with the standard of plural track widths by changing a read ing track width and a writing track width in using the head width as a unit. CONSTITUTION:A magnetic head B is a magnetic head for reading and writing the data of width (a) and the whole is composed of small heads B1, B2, B3...Bn-1, Bn of a width (b). A track D to record or recorded on a medium has a track width C and a recording direction is an arrow mark (d) or an arrow mark (e). When the data are read and written for the track of a head width (a) or below, a pair of small heads matched to a track width (b) is selected. At such a time, the minimum track width able to cope with the magnetic head B is a single small head width (b) and the maximum track width is a value (bXn)=a when all small heads B1, B2, B3...Bn are used. Thus, by a single magnetic recorder, the system can completely cope with plural types of magnetic record ing media different in track width and a magnetic recorder.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic recording device in a computer, etc.
In particular, the present invention relates to a variable track width magnetic recording medium access system.

[Conventional technology]

Conventionally, when a single device accesses multiple track densities in a magnetic recording device such as a floppy disk device, all track widths are handled by a magnetic head that is matched to the minimum track width to be used.

[Problem to be solved by the invention]

Therefore, when reading data from a conventionally recorded magnetic recording medium using a magnetic recording device that uses a wider head, the premise is that the output is extracted from a track with a width corresponding to the magnetic head. However, if the width is too small, sufficient output current cannot be obtained, and complete compatibility between devices or media cannot be maintained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a variable track width magnetic recording medium access system capable of eliminating the above-mentioned drawbacks and compatible with a plurality of track width standards.

[Means to solve the problem]

The variable track width magnetic recording medium access method of the present invention compares the output of each of the small heads with a magnetic head in which a plurality of small heads are stacked, and determines the range in which the outputs are continuously equal to the track width of the magnetic recording medium. and means for applying the same write signal to one or more successive small heads to set the track width of the magnetic recording medium, the read track width and the rack width for writing 1 to be set to the track width of the small head. It is configured so that the width of the image is changed as a unit.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. In the figure, the track width variable magnetic recording medium access method is as follows:
The magnetic recording medium has a rotation axis A of a TiSF type magnetic recording medium, a variable track width magnetic recording head B, a signal recordable portion C of the magnetic recording medium, and a recording track D.

FIG. 2 is an explanatory diagram showing the relationship between the rack D and the magnetic recording spatulas 1 to B on the magnetic recording medium in the present invention.

In the figure, magnetic head B is a magnetic head for reading and writing data with a width a, and a small head B1. B2, B3
--Bn-1 and Bn constitute the whole. A track D to be recorded (or being recorded) on the medium has a track width C of 1 to 1, and the recording direction is the arrow d or e.

When data is to be read or written to a track having a head width of a or less, a set of small heads 1 to 1 matching the track width is selected. At this time, the minimum track width that can be supported by the magnetic spatula FB is the width of a single small head 1], and the maximum track width is the width of a single small head when all small heads 1 to B, 22B3...Bn are used. The value (bXn)a.

FIG. 3 is an explanatory diagram showing the track width recognition method, and shows a cross-sectional view of the magnetic head B and the magnetic recording medium as viewed in the data recording direction. In the figure, B is a magnetic head with a width a, Bl, B2-Bn-0Bn are small heads with a width of 1, El is a magnetic layer of a magnetic recording medium, B2 is a head of a magnetic recording medium,
D is a recorded track, and f and g are both ends of the magnetic recording medium.

Figure (a) shows the initial state of the track width recognition method, in which the magnetic recording head B is positioned at the f end of the magnetic recording medium perpendicular to the recording direction. After that, only the output from the small head B1 is To confirm this, the magnetic head B is moved in the g direction by b increments.Then, when an output can be obtained from the small head B1, the movement in the g direction is stopped.The state at that time is shown in FIG. 3(b).

Next, in FIG. 4B, the output from the small head B1 and the output from the small head B2 are compared. Similarly, B1 and B3. B
, B4 .

〔Effect of the invention〕

As explained above, the present invention utilizes a variable track width magnetic recording head and a track width recognition method to enable a single magnetic recording device to produce multiple types of magnetic recording media with different track widths and their magnetic recording. It has the effect of being completely compatible with the device.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the relationship between tracks on a magnetic recording medium and a track width variable magnetic recording head, and FIG. b)
FIG. 2 is an explanatory diagram showing a track width recognition method. B...Magnetic head, B,, B2. ...Bn...small head, D...track, b...width of small head, C...
・Track width.

Claims (1)

[Claims] a magnetic head in which a plurality of small heads are stacked; a means for comparing each output of the small heads and setting a range in which the outputs are continuously equal as a track width of a magnetic recording medium; and means for applying the same write signal to set the track width of the magnetic recording medium, and changing the read track width and the write track width in units of the width of the small head. Recording medium access method.