JPH0371473A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To read a correct positioning information even in the case of using a thin magnetic disk by shifting the positions of a servoslider reading the information for positioning and data slider writing and reading the information to a magnetic disk. CONSTITUTION:A servoslider 2 reads the position of a servoslider 2 from the servoface 50b of a magnetic disk 50 to deduce the positions of all other data sliders 1A - 1C in a constant positional relation with the servoslider 2 based on this information. The position of the data slider 1A located at the opposite side of the servoslider 2 by interposing the magnetic disk 50 is then arranged by sliding it in the radial direction of the magnetic disk 50. In the case of reading the information from the servoface 50b of the magnetic disk 50 by the servoslider 2, the bufflement by the magnetic field generated by the data slider 1A is therefore eliminated. A correct positioning signal can thus be read even when a thin magnetic disk 50 is used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a magnetic disk device, and particularly to a magnetic disk device for reading the position of a magnetic head or writing information.

The present invention relates to a magnetic disk device having a servo disk that performs successive loading.

[Conventional technology]

FIG. 3 shows a conventional example.

In the conventional example shown in FIG. 3, information is written on one surface of a magnetic disk 50, which is a magnetic recording medium that rotates at high speed due to an external force (not shown).

sliders 51A, 51B, 51C for data to be read;
A servo slider 52 is provided on the other surface of the magnetic recording medium 50 and determines the positions at which data sliders 51A, 51B, and 51C write and read information.

Here, three data sliders 51A, 51B, and 51C are provided for one servo slider 52, and each data slider 51A.

The positional relationship between 51B, 51C and the servo slider 52 is known, and if the position of the servo slider 52 is known, each data slider 51A, 51B.

The location of 51C can also be found. These servo sliders 52 and each data slider 51A, 5
1B and 51C are each provided at the tip of the slider support 53, and are further fixed to an arm portion 54 of a positioning mechanism (not shown) for a magnetic head (not shown).

In order to effectively utilize the magnetic disk 50, the servo slider 52 is mounted at the same position as the data slider 51A on the surface of the magnetic disk 50 with the magnetic field disk 50 in between.

[Problem to be solved by the invention]

In recent years, there has been a trend toward using thinner magnetic disks because it is necessary to increase the number of magnetic disks in order to increase the storage capacity of the entire device.

However, in the above conventional example, the servo slider and the data slider are installed so that they are at almost the same position on the front and back sides of the magnetic disk with the magnetic disk in between, so the servo slider is attached to the servo surface of the magnetic disk. If the data slider tries to write a data signal on the data surface at the same time as reading the positioning signal written on the servo slider, the magnetic field generated by the data slider at this time becomes noise, making it impossible for the servo slider to read the positioning signal accurately. An inconvenience was occurring.

[Purpose of the invention]

The purpose of the present invention is to improve the disadvantages of the conventional example, and to enable the servo slider to receive accurate positioning signals even when using a thin magnetic disk, without being affected by the writing of the data slider. The object of the present invention is to provide a magnetic disk device that can read data.

[Means to solve the problem]

The present invention has a data slider that writes and reads information on one side of a magnetic disk that rotates at high speed due to external force, and a position on the other side of the magnetic disk where the data slider writes and reads information. It has a servo slider for determining the servo. Then, a method is adopted in which the positions of the data slider and the servo slider are shifted relative to the magnetic disk. This aims to achieve the above-mentioned objective.

[For production]

A magnetic disk is rotated at high speed by an external force. Along with this rotation, an air flow is generated, and this air flow causes the slider to rise above the surface of the magnetic disk. In this state, the core installed in the slider continuously outputs and writes information from the magnetic disk. Furthermore, in this floating state, the servo slider reads the position of the servo slider from the servo surface of the magnetic disk, determines the position of the data slider based on this information, and controls the positioning mechanism of the magnetic head accordingly to perform data transfer. Position the slider for use.

E Example of the invention] An example of the invention will be described below with reference to FIGS. 1 and 2. Here, the same reference numerals are used for the same constituent members as in the conventional example described above.

In the embodiment shown in FIG. 1, one surface 50 of a magnetic disk 50 rotates at high speed due to an external force (not shown).
Data sliders LA and IB for writing and reading information to a
, IC, and data sliders LA, IB on the other surface 50b of the magnetic disk 50, and a servo slider 2 that determines the position at which the IC writes and reads information. Then, data slider IA and servo slider 2
The position of the magnetic disk 50 with respect to the magnetic disk 50 is shifted.

Here, the servo surface 50 on the top surface of the magnetic disk 50 is
A servo slider 2 is disposed opposite b and is attached to one end of the slider support 10. The other end of the slider support 10 is attached to an arm 11 of a magnetic head positioning mechanism (not shown). Further, the data sliders LA, IB, and IC are arranged to face the lower surface of the magnetic disk 50, and are attached to the slider support 10 similarly to the servo slider 2, and are further provided with a magnetic head positioning mechanism (not shown). It is attached to the arm 11 of These servo slider 2 and data sliders IA, IB, and IC are moved as one by a magnetic head positioning mechanism. The data slider IA is fixed to the magnetic disk 50 with a displacement of t in the radial direction (direction into the center of FIG. 1). In this embodiment, this t is set to 1 (rn
m] or more, the servo slider 2 was able to accurately read the positioning signal even if the data slider LA was writing, so here we set the deviation t to be 1 (mm) or more. I have set 2.

Next, the operation will be explained.

The magnetic disk 50 is rotating at high speed due to an external force (not shown). With this rotation, an air flow is generated, and the data sliders LA, IB, IC and servo slider 2 are lifted off the surface of the magnetic disk 50 by this air flow. In the example shown in FIG. 1, one servo slider 2 is equipped with data sliders IA, IB, and IC, one on the same side and two data sliders on the opposite side. There is. These sliders IA, IB, Ic.

2 is floated by the airflow, a core (not shown) provided in the slider continuously writes information from the surface of the magnetic disk 50.

The servo slider 2 is attached to the servo surface 50 of the magnetic disk 50.
The position of the servo slider 2 is read from b, and based on this information, the (571F) of all other data sliders LA, IB, and IC that are in a certain positional relationship with this servo slider 2 is determined. Data slider I on the opposite side of servo slider 2 across 50
Since the position of the data slider IA is shifted by t in the radial direction of the magnetic disk 50, when the servo slider 2 reads information from the servo surface 50b of the magnetic disk 50, the data slider IA is not disturbed by the generated magnetic field. There isn't. According to the information thus obtained, the positioning mechanism of the magnetic head is controlled to position the data sliders IA, IB, and IC, and information is written.

More and more.

[Second example] Next, a second embodiment will be described based on FIG. 2.

In the first embodiment described above, the position of the data slider IA with respect to the servo slider 2 is set to the magnetic disk 50.
However, in this second embodiment, this is shifted in the circumferential direction. The other configurations are the same as those of the first embodiment described above.

Even in this case, the same effects as in the first embodiment described above can be obtained.

In each of the above embodiments, the direction in which the data slider IA is shifted relative to the servo slider 2 is exemplified in the radial direction and circumferential direction of the magnetic disk 50. It is not limited to. As long as the positional relationship between both sliders is constant, the direction of shifting is not particularly limited.

〔Effect of the invention〕

As explained above, in the present invention, the positions of the servo slider that reads information for positioning the magnetic head and the data slider that writes and outputs information to the magnetic disk are shifted with respect to the magnetic disk. With this tag, even if a thin magnetic disk is used, when the servo slider reads position information, it is prevented from being affected by the magnetic field during writing of the data slider, making it possible to read accurate positioning information. It is possible to provide an unprecedented and excellent magnetic disk casing.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example in which the data slider is shifted in the radial direction of the magnetic disk with respect to the servo slider 2 in the present invention, and FIG. FIG. 3 is a plan view showing the second embodiment, and FIG. 3 is a cross-sectional view showing the conventional example. 1... Data slider, 2... Servo slider, 50... Magnetic disk as a magnetic recording medium. Iseiri NEC Corporation

Claims (3)

[Claims] (1) a data slider that writes and reads information on one side of a magnetic recording medium that rotates at high speed due to an external force; and a data slider that writes information on the other side of the magnetic recording medium; What is claimed is: 1. A magnetic disk device comprising a servo slider for determining a read position, wherein the data slider and the servo slider are arranged at different positions with respect to the magnetic recording medium. (2) The magnetic disk device according to claim 1, wherein the data slider and the servo slider are shifted in the radial direction of the magnetic recording medium. (3) The magnetic disk device according to claim 1, wherein the data slider and the servo slider are offset in the circumferential direction of the magnetic recording medium.