JPH01298507A - Disk driving device - Google Patents

Abstract

PURPOSE:To immediately inspect the validity/invalidity of data written in a disk by providing the title device with a means for inspecting the validity/ invalidity of information read out by a reading gap. CONSTITUTION:A magnetic head 10 writes data on the recording face of a magnetic disk by means of magnetic flux generated in a writing head gap 10a correspondingly to the data. Almost simultaneously with the writing, data previously written in the recording face of the magnetic disk are read out by a reading head gap 10c. The read data are transferred to a reading/writing circuit 11 through a read signal line 14c. At that time, the validity/invalidity of the data transferred to the circuit 11 is inspected by an inspecting part 12. Consequently, information written by the writing gap can be instantaneously read out by the reading gap and the validity/invalidity of the data written in the disk can be immediately inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a disk drive device that reads and writes information to and from a recording medium such as a magnetic disk.

(Prior Art) In recent years, information processing devices such as personal computers and word processors have become capable of reading/writing random files as external storage devices, reducing the time required to read/write various files such as programs and data. Disk drive devices are being used that have the following advantages.

In such a disk drive device, when a predetermined command is generally transferred from the CPU of the information processing device to the disk drive device, the disk drive device reads/writes information to/from the magnetic disk using a magnetic head. ing.

FIG. 3 simply shows the configuration of such a disk drive device.

As shown in the figure, the disk drive device includes a magnetic head 1 that reads/writes information to a magnetic disk (not shown), and a read/write circuit 2 that controls the read/write operations of the magnetic head 1. It is equipped.

Note that 3 in the figure is a host computer that transfers predetermined commands to the read/write circuit 2. In FIG.

Further, the magnetic head 1 is connected to a read/write circuit 2 by a read/write signal line 4 . Further, the read/write circuit 2 is connected to the host computer 3 by a read signal line 5 and a write signal line 6.

Data to be written to the magnetic disk from the host computer 3 is read/written via the write signal line 6.
The data is transferred to the write circuit 2. Thereafter, the data transferred to the read/write circuit 2 is written onto the recording surface of the magnetic disk by the magnetic head 1.

On the other hand, data read from the recording surface of the magnetic disk by the magnetic head 1 is transferred to the host computer 3 via the read/write circuit 2 and the read signal line 5.

By the way, the magnetic head 1 of such a disk drive device generally has a magnetic head 1 as shown in FIG.
It has a structure in which one read/write gap 1a is provided.

When data is read by the magnetic head 1, data is read by changes in magnetic flux on the recording surface of the magnetic disk.

On the other hand, during writing by the magnetic head 1, the magnetic flux generated in the read/write gap 1a magnetizes the recording surface of the magnetic disk.

(Problem to be Solved by the Invention) However, in the conventional disk drive device described above, since the read/write gap 1a of the magnetic head 1 is one, the data written on the recording surface of the magnetic disk is verified. In order to do this, it is necessary for the magnetic disk to rotate once and to read out the location where data was previously written, which poses a problem in that it takes time to verify the data.

Furthermore, the read/write circuit 2 is not equipped with a function to verify the written data, so the data written by the magnetic head 1 is read again by the magnetic head 1, and the read data is transferred to the host computer. 3
Verification is performed on the host computer, which places a burden on the host computer, resulting in a reduction in the processing capacity of the host computer.

The present invention has been made under these circumstances, and provides a disk drive device that can quickly verify the correctness of data written to a disk and can prevent a decrease in the processing capacity of a host computer. The purpose is to provide.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the disk drive device of the present invention provides a write gap provided along the rotational direction of the disk and a write gap formed by the write gap. A magnetic head having a read gap for instantaneously reading information, a read/write means for controlling read and write operations of the magnetic head, and a verification means for verifying the correctness of the information read by the read gap. It is something.

(Function) In the disk drive device of the present invention, the information written by the write gap can be instantaneously read by the read gap. Further, the verification means can verify the correctness of the information read by the read gap.

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

FIGS. 1 and 2 briefly show the configuration of a disk drive device.

As shown in these figures, disk drive devices include
A write head gap 10a11ob and a read head gap 10 are provided parallel to each other at intervals along the rotation direction (direction of arrow A) of a magnetic disk (not shown).
a read/write circuit 11 that controls read/write operations of the magnetic head 10 and the magnetic head 1o;
, a verification unit 12 that verifies whether the information written on the magnetic disk is correct or incorrect is provided.

Note that 13 in the figure is a host computer that transfers predetermined commands to the read/write circuit 11.

Further, the magnetic head 10 has write signal lines 14a, 14
b and read signal lines 14c and 14d to the read/write circuit 11. Furthermore, the read/write circuit 11 is connected to the host computer 13 by a write signal line 15a, a read signal line 15b, and an error signal line 15c.

A disk drive device having such a configuration performs the following operations.

First, data to be written on the magnetic disk is transferred from the host computer 13 side to the read/write circuit 11 via the write signal line 15a.

Next, the data transferred to the read/write circuit 11 is first transferred to the magnetic head 10 via the write signal line 14a.
transferred to the side.

After that, the magnetic head 10 moves to the write gap 1.
Data is written on the recording surface of the magnetic disk by magnetic flux generated corresponding to the data at 0a.

Almost at the same time, the data previously written on the recording surface of the magnetic disk is read by the read gap 10c.

This read data is transferred to the read/write circuit 11 via the read signal line 14c. At this time,
The data transferred to the read/write circuit 11 is verified by the verification unit 12 as to whether it is correct or incorrect.

If the data written on the recording surface of the magnetic disk is erroneous, the data is transferred again from the read/write circuit 11 to the magnetic head 10 via the write signal line 14a.

Furthermore, the data written on the recording surface of the magnetic disk is read by the read gap 10d.

The read data is then transferred to the read signal line 14d.
The data is transferred to the read/write circuit 11 via. At this time, the data transferred to the read/write circuit 11 is verified by the verification section 12 as to whether it is correct or incorrect.

If the data written on the recording surface of the magnetic disk is erroneous, it is transferred as an error signal to the host computer 13 via the error signal line 15C.

In this way, in this embodiment, the write gap i
The data written by 0a is read by the read head gap 10c almost at the same time, and the verification unit 12 can verify whether the read data is correct or not.

As a result, accurate data can be reliably and quickly written on the recording surface of the magnetic disk.

In addition, since the verification unit 12 allows the disk drive device to verify the data written on the recording surface of the magnetic disk, the burden of data verification performed on the host computer 13 side can be omitted. 13 can be prevented from decreasing.

In this embodiment, an example in which the magnetic head 10 is provided with four head gaps has been described, but the present invention is not limited to this example.
Two bed gaps may be provided, or five or more bed gaps may be provided.

Further, in this embodiment, an example in which the present invention is applied to a disk drive device has been described, but the present invention is not limited to this example, and can be applied to magnetic heads of digital audio tape recorders (DAT), video tape recorders (VTR), etc. It may also be applied to other electronic devices that have the following characteristics.

[Effects of the Invention] As explained above, according to the disk drive device of the present invention, the information written by the write gap can be instantly read by the read gap, and the information read by the read gap can be read by the verification means. Since it is possible to verify the correctness of the data written on the disk, it is possible to quickly verify the correctness of the data written to the disk, and it is possible to prevent a decrease in the processing capacity of the host computer.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention applied to a disk drive device, FIG. 2 is a diagram showing the configuration of the magnetic head shown in FIG. 1, and FIG. 3 is a diagram showing a conventional disk drive device. The block diagram of FIG. 4 is a diagram showing the configuration of the magnetic head of FIG. 3. DESCRIPTION OF SYMBOLS 10... Magnetic head, 10a, 10b... Write head gap, 10c, lQd... Read head gap, 11... Read/write circuit, 12...
Verification section, 13... host computer. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - 4th

Claims (1)

[Claims] (1) A magnetic head that has a write gap provided along the rotational direction of the disk and a read gap that instantaneously reads information written by the write gap, and a read/write head that controls the read and write operations of this magnetic head.
A disk drive device comprising a writing means and a verification means for verifying whether the information read by the read gap is correct or incorrect.