JPH0682318B2 - Control device for information recording disk device - Google Patents

Description

The present invention relates to a control device for an information recording disk device, which is connected between a host computer and an information recording disk device and controls the disk device.

(Prior Art) In recent years, information recording disk devices such as magneto-optical disk devices have been used for computer data recording, document files, and the like.

The magneto-optical disk cartridge used in this magneto-optical disk device is a resin-made magneto-optical disk for recording / reproduction that can be freely erased and rewritten for easy handling, and attachment / detachment to / from the recording / reproducing apparatus. It is stored in the case.

FIG. 4 is a block diagram showing an example of a magneto-optical disk used in the disk device shown in FIG. 5, which will be described later. FIG. 4A is a bottom view and FIG.

As shown in the figure, the magneto-optical disk 22 of the conventional example is formed on one surface of a substrate 22a which is a disk made of a transparent resin such as polycarbonate, Fe, Co for recording and reproducing information by the magneto-optical effect. A magneto-optical film (MO film) 22b made of Tb, Tb, Gd, etc. is formed, and a protective film 22c made of an ultraviolet curable resin or the like is further formed thereon
Is formed, and a hub 24 made of a metal plate for driving the disk 22 is fixed to the center portion thereof.The disk 22 is housed in a resin case (not shown) as described above, and is combined with a magneto-optical disk cartridge. Become.

In the recording area 23 where information is recorded / reproduced on / from the magneto-optical film 22b of the disk 22, spirally or concentrically 1.
Many recording tracks are formed with a pitch of 5 μm. In each of the recording tracks, 21 sectors each including a management area in which management information is recorded in advance and a data area in which information is recorded / reproduced are formed. This management area is provided in the first part of each sector, and this data area is provided following the management area.

FIG. 5 is an explanatory diagram of a recording / reproducing operation of an example of a magneto-optical disk device controlled by the control device of FIGS. 1 and 7 described later.

As shown in the figure, the magneto-optical disk device 21 of the conventional example is used with the magneto-optical disk 22 mounted thereon, a base 25,
It is composed of an electromagnet 26, an optical recording / reproducing device 27, a feeding device 40 and the like.

The above-mentioned magneto-optical disk 22 is rotationally driven at CAV 3.600 rpm by a spindle motor (not shown) fixed to a base 25, and the magneto-optical disk is arranged by an electromagnet 26 arranged on the protective film 22c side with a gap. A vertical bias magnetic field having a predetermined polarity is applied to the film 22b, if necessary. Information is recorded / reproduced on the magneto-optical film 22b from the side of the substrate 22a by the laser light 36 from the optical recording / reproducing device 27.

This optical recording / reproducing device 27 includes a laser diode 28, a collimator lens 29, a beam splitter 30, a rising prism.
31, an objective lens 32, a polarization beam splitter 33, condenser lenses 34A and 34B, photo diodes 35A and 35B, and the like.

The laser light emitted from the laser diode 28 is collimated by the collimator lens 29,
A beam shaping prism (not shown) shapes the beam cross-section into a predetermined shape, passes through the beam splitter 30, and enters the rising prism 31. The laser beam 36 reflected by the rising prism 31 is, as the light spot 37 having a minute diameter, formed on the recording track of the recording area 23 of the disk 22 on the surface of the magneto-optical film 22b by the objective lens 32. Is irradiated.

A light spot 37 irradiated on the surface of the magneto-optical film 22b.
Has a light intensity suitable for recording when the disk device 21 is operating in the recording mode, and has a light intensity suitable for reproduction when operating in the reproduction mode. The laser diode 28 is controlled by an output control device (not shown).

In the case of this recording mode, based on the digital signal corresponding to the recording data, the perpendicular magnetization direction of the magneto-optical film 22b on the recording track is reversed by the bias magnetic field by the electromagnet 26 only at the spot where the light spot 37 hits. Then, the recording of this digital signal is performed.

In the case of the reproduction mode, the laser light reflected on the surface of the magneto-optical film 22b has a different rotation direction of the polarization plane depending on the perpendicular magnetization direction of the magneto-optical film 22b due to the magneto-optical effect. Is reflected by the beam splitter 30 through the objective lens 32 and the rising prism 31,
The light is incident on the polarization beam splitter 33 via a half-wave plate (not shown). The laser light transmitted through the polarization beam splitter 33 is condensed by the condenser lens 34A, converted into an electric signal by the photo diode 35A, output as a detection signal, and reflected by the polarization beam splitter 33. The laser beam is condensed by the condenser lens 34B, converted into an electric signal by the photo diode 35B, and output as a detection signal.

At this time, the magnitudes of the two detection signals are changed in the opposite directions by the rotation direction of the polarization plane due to the action of the polarization beam splitter 33. Therefore, the digital signal is reproduced from the difference between the detection signals. Be seen.

Of the optical recording / reproducing device 27, the laser diode
28, a collimator lens 29, a beam splitter 30, a polarizing beam splitter 33, a condenser lens 34A, 34B, a photo unit 35A, 35B and the like fixed unit 27-1 is fixed to the base 25, the standing The movable unit 27-2 including the raising prism 31 and the objective lens 32 is mounted on the movable unit 40b of the feed device 40. In the feed device 40, the movable portion 40b is moved in the radial direction of the disc 22 along a guide rail (not shown) via the bearing 40c by the driving force of the linear motor 40a of the device 40 fixed to the base 25. The recording track is searched by performing a so-called feed operation in which the light spot 37 is moved from the inner diameter to the outer diameter of the recording area 23 of the disc 22. The base 25 is configured to be held by the main chassis of the device 21 (not shown) via a vibration isolation mechanism (not shown).

Further, with respect to the surface wobbling of the disk 22, etc., the focus of the light spot 37 is automatically made to follow the surface of the magneto-optical film 22b, so-called focus servo is a focus servo signal based on the detection signal output. Based on this, the vertical position of the objective lens 32 is set to the movable part 40b of the feed device 40.
It is performed by controlling the focus servo actuator 38 mounted on the.

The so-called tracking servo, which automatically causes the light spot 37 to follow the recording track with respect to the eccentricity of the disk 22, is based on the tracking servo signal based on the detection signal output from the management area.
This is performed by controlling the radial position of 32 disks 22 by a tracking servo actuator 39 mounted on the movable portion 40b. Since the limit of the radial movement range of the optical spot 37 of the disk 22 due to the tracking servo operation is usually about several hundreds of μm, the precise positioning is used for the radial positioning of the optical spot 37 of the disk 22. Servo operation and rough positioning are shared as the feed operation.

The operation of the magneto-optical disk device 21 of the conventional example described above is
The outline is given to explain its operating principle.
In the actual operation, the recording mode includes a series of operations such as erasing (erase), recording (write), and verification (verify).

That is, in the above-described conventional magneto-optical disk 22, the magneto-optical film 22b cannot be overwritten, which is possible with a magnetic tape, a magnetic disk or the like. The erasing operation of the recording section is performed, and then the recording operation is performed. Further, since the magneto-optical film 22b lacks reliability, the collating operation is performed after the recording operation. That is, the recording section is reproduced (read), the recorded signal and the reproduced signal are collated, and if they match,
Move on to the next operation. In the case of non-coincidence, the recording signal of this part is recorded again in the preset alternative area,
After that, the collation and the change of the recording address are performed. , So-called alternative processing is performed.

The control of the magneto-optical disk device 21 is performed by a control device connected between the device 21 and a host computer.

FIG. 6 is an explanatory view of the control operation of the control device shown in FIGS. 1 and 7, which will be described later. FIG. 6A shows the recording mode and FIG.
Indicates the playback mode.

Further, FIG. 7 is a block diagram showing an example of a control device of a conventional magneto-optical disk device, FIG. 8 is an explanatory diagram of an abnormality processing operation in the control device of FIG. 7, and FIG. In the case of an address error in the formatter in the mode (recording operation), FIG. 7B shows the case of a data number error in the ECC in the reproduction mode.

As shown in FIGS. 6 and 7, the control device 51 of the conventional example.
Is a host computer 11 and the magneto-optical disk device 21.
Is connected between and.

The control device 51 includes an interface 2, a buffer memory 5, a mechanism control device 8, a microcomputer (hereinafter abbreviated as a microcomputer) 53, a DMA controller 54, an error correction circuit (hereinafter abbreviated as ECC) 56, a formatter 57, and the like. It is configured.

This interface 2 is the host computer 11
And the microcomputer 53 as well as relaying data exchange between the host computer 11 and the DMA controller 53. Microcomputer 53 is DMA controller 54, ECC5
6. The operation of the formatter 57 and the mechanical system controller 8 is controlled. The DMA controller 54 controls data exchange between the interface 2 and the buffer memory 5 and between the buffer memory 5 and the ECC 56 based on a command from the microcomputer 53.
The buffer memory 5 temporarily stores data based on a command from the DMA controller 54. The ECC 56 performs error correction code addition, collation operation, error detection / correction, etc. based on commands from the microcomputer 53. The formatter 57 performs data modulation and demodulation based on the command from the microcomputer 53. The mechanical system control device 8 has a built-in microcomputer for mechanical system control (not shown), and controls each operation of the magneto-optical disk device 21 based on a command from the microcomputer 53.

Then, as shown in FIG. 6 (A), in the recording mode, the host computer 11 outputs signals such as a recording command and a recording section to the microcomputer 53 through the interface 2 and Recording data is supplied to the buffer memory 5 via the interface 2 and the DMA controller 54. During the recording operation, the ECC 56 adds an error correction code to the recording data from the buffer memory 5, and the formatter 57 modulates the recording data to generate a recording signal. The mechanical system control device 8 instructs the disk device 21 to switch search operation, erase operation, recording operation, and collation operation, control of bias magnetic field by the electromagnet 26, control of output intensity of the laser diode 28, Position control of the objective lens 32 to the recording section is performed, and in this disc device 21, during a recording operation, in a continuous sector of the recording track of the recording area 23 of the disc 22,
The recording signal is sequentially recorded for each sector.

After the recording operation is completed, the disk device 21 supplies the formatter 57 with a reproduction signal for the verification operation. The formatter 57 demodulates the reproduced signal, the ECC 56 compares the reproduced data from the formatter 57 with the recorded data from the buffer memory 5, and if necessary, the microcomputer 53 performs the above-mentioned substitution. The processing is controlled, and a recording command end report is sent from the microcomputer 53 to the host computer 11.

As shown in FIG. 3B, in the reproduction mode, the host computer 11 outputs signals such as a reproduction command and a reproduction section designation to the microcomputer 53. Based on this command, the mechanical system control device 8 causes the disk device
The search operation, the switching instruction of the reproducing operation, the control of the electromagnet 26, the control of the laser diode 28, the position control of the objective lens 32 to the reproducing section, etc. are performed with respect to 21, and the disk device 21 performs the formatter operation. A reproduction signal is supplied to 57. The formatter 57 demodulates the reproduction signal, the ECC 56 performs error detection / correction of the reproduction data, and outputs the reproduction data to the host computer 11 via the buffer memory 5. To be done.

Next, in the control device 51, the ECC 56 and the formatter 5
The abnormality processing operation when an operation error occurs in 7 etc. will be described.

The types of operation errors that may occur in each of the above-described components of the control device 51 are as follows. In the ECC 56, when the recording mode (recording operation), the number of recording data instructed by the microcomputer 53 does not match the number of recording data requested by the formatter 57, data number error, recording mode (verifying operation)
At this time, a collation error occurs when the collation result of the recorded data from the DMA controller 54 and the reproduced data from the formatter 57 does not match, the number of recorded data instructed by the microcomputer 53 and the formatter 57 request in the reproducing mode. Data number error when the number of recorded data does not match,
In the recording mode (comparison operation), a collation error occurs when the collation result of the recorded data from the DMA controller 54 and the reproduced data from the formatter 57 does not match, and in the reproduction mode, the number of reproduced data by the command of the microcomputer 53 and There are a data number error when the number of reproduced data from the formatter 57 does not match and an error uncorrectable error when the error cannot be corrected for the reproduced data from the formatter 57. In the formatter 57, an address error occurs when the address of the sector to be recorded cannot be detected by the disk device 21 in the recording mode (recording operation). In the reproducing mode, the sector to be reproduced by the command of the microcomputer 53. In addition to the address error in the case where the address of (1) cannot be detected in the disk device 21, all operation errors of the mechanical system control device 8 and the disk device 21 are treated as operation errors of the formatter 57.
No operation error occurs in the DMA controller 54.

In the control device 51, when the above-mentioned operation error occurs, it is necessary to temporarily stop the operation of each of the constituent elements to perform the repair operation, so that the microcomputer 53 issues an operation stop instruction. That is, each of these constituent elements has a built-in register (not shown) to which an operation command from the microcomputer 53 is written. As a result of the operation based on the operation command (normally completed or By detecting a status signal from a register indicating that an operation error has occurred), the operation error as described above is detected, whereby the microcomputer 53 issues an operation stop command to each component.

For example, as shown in FIG. 8A, in the recording mode, the address error occurs in the formatter 57 during the recording operation for the sector 3 during the recording operation for the sectors 1 to 5. If the microcomputer
At 53, when the address error for sector 3 is detected, an operation command for sector 4 has already been issued to each component, so an operation stop command for sector 5 is issued to each component. By issuing the command, the operation of the sector 5 in each component is stopped.

Further, as shown in FIG. 3B, in the reproduction mode, the sector 2 in the middle of performing the reproduction operation for the sectors 1 to 5
Regarding the above, when the data number error occurs in the formatter communication unit of the ECC 56, the operation command for the sector 3 is issued to each component in the microcomputer 53, and therefore the operation stop command for the sector 4 is issued. By issuing to each component, the operation for sector 4 in each component is stopped. The ECC 56 is composed of three parts, a formatter communication part, a processing part, and a DMA controller communication part, and it takes time to correct the error in the processing part in the reproduction mode. The operation timing is automatically set to 1 for each sector of playback data.
It is configured to be delayed by one sector by being sequentially supplied by each sector, and by this,
The processing speed is increased.

(Problems to be Solved by the Invention) In the control device 51 of the conventional example configured as described above, when an operation error occurs, as described above, the microcomputer 53 issues an operation stop command after detecting the operation error. Since it is issued, there is a problem that the timing of this operation stop command is late. Since the operation stop command is delayed, the operation for the sector next to the operation error occurrence sector is performed before the operation is stopped, and the repair operation becomes complicated. As a countermeasure against this, when the control operation of the microcomputer 53 is speeded up, the microcomputer 53 becomes complicated and the cost is increased.

The present invention has been made in view of the above points, and an object of the present invention is to provide a control device for an information recording disk device, in which when an operation error occurs, the operation is stopped at an early timing. .

(Means for Solving the Problems) A control device for an information recording disk device of the present invention is connected between a host computer and the information recording disk device,
A control device for controlling this disk device, comprising at least a DMA controller, an error correction circuit, and a formatter, the control device of an information recording disk device comprising three components respectively controlled by a microcomputer. Each of the three components
When an operation error occurs in its own element, an operation error generation signal supplied from the operation error detection circuit in its own element, or from an operation error notification circuit of another element when an operation error occurs in another element According to the operation error notification signal, the operation abnormality processing means having at least an automatic operation stop circuit for outputting the automatic operation stop signal for stopping the operation of the own element at a predetermined timing is provided.

(Embodiment) The control device of the information recording disk device of the present invention is the control device as described above, wherein at least three components of the DMA controller, the ECC and the formatter are respectively provided.
When an operation error occurs in its own element, an operation error generation signal supplied from the operation error detection circuit in its own element, or from an operation error notification circuit of another element when an operation error occurs in another element By the operation error notification signal for notifying that an operation error has occurred, by providing an operation abnormality treatment means having at least a self-operation stop circuit that outputs a self-operation stop signal for stopping the operation of the self element at a predetermined timing, The above-mentioned object is achieved.

One embodiment of the present invention will be compared and described under the same conditions as the description of the conventional example.

FIG. 1 is a block diagram showing an example of a control device of a magneto-optical disk device which is an embodiment of a control device of an information recording disk device of the present invention, and FIG. 2 is each component of the control device of FIG. 2A is a block diagram of the operation abnormality treatment circuit in FIG.
Is a DMA controller operation abnormality treatment circuit, and FIG.
A CC operation abnormality treatment circuit, FIG. 6C is a formatter operation abnormality treatment circuit, FIG. 3 is an abnormality processing operation explanatory diagram in the control device of FIG. 1, and FIG. In the case of an error in the number of data in ECC during operation), the same figure (B) shows the case of the verification error in ECC during the recording mode (verification operation), and the same figure (C) shows the address error in the formatter during the recording mode (recording operation). In the case (D), there is a data number error in the reproduction mode ECC, in the case (E), there is an error uncorrectable error in the reproduction mode ECC, and in the figure (F), the reproduction mode formatter. This is the case of an address error in.

As shown in FIG. 1 and FIG. 6 described above, the control device 1 of one embodiment of the present invention is connected between the host computer 11 and the magneto-optical disk device 21.

The control device 1 includes an interface 2, a DMA controller 4, a buffer memory 5, an ECC 6, a formatter 7, a mechanical system control device 8 and the like. This control device 1
Is that the DMA controller 4, the ECC 6 and the formatter 7 are provided with the operation abnormality treatment circuits 4a, 6a and 7a, respectively, and the microcomputer 3 has a smaller processing capacity than the control device 51 of the conventional example described above. Since the only difference is the same, the description of the same parts as those of the conventional example will be omitted.

As shown in FIG. 2 (A), the operation abnormality treatment circuit 4a of the DMA controller 4 is composed of a self-operation stop circuit 4c.

Then, when an operation error notification signal for notifying that an operation error has occurred in the ECC 6 or the formatter 7 described later is supplied from the ECC 6 to the self-operation stop circuit 4c, the self-operation stop circuit 4c outputs A self-operation stop signal for stopping the operation of itself is output at a predetermined timing as quickly as possible, whereby the operation of the DMA controller 4 is stopped at a predetermined timing as soon as possible as described later. Also, this self-stop signal is sent to the DMA controller 4
It is also supplied to the register 4b built in the
The status signal described above is output from the register 4b in response to the control signal from, and the restoration operation is performed.

As shown in FIG. 7B, the ECC6 operation abnormality treatment circuit
6a includes a self-operation stop circuit 6c, an operation error notification circuit 6d, an operation error detection circuit 6e, and the like.

When an operation error of the kind described above occurs in this ECC6, the operation error signal is output to the operation error detection circuit 6e.
The operation error detection circuit 6e detects the operation error and supplies an operation error generation signal indicating that the operation error has occurred to the self-operation stop circuit 6c and the operation error notification circuit 6d, respectively. In this operation error notification circuit 6d, by this operation error occurrence signal,
The operation error notification signal is output to each of the DMA controller 4 and the formatter 7. The operation error notification signal from the formatter 7 is supplied to the self-operation stop circuit 6c and the operation error notification circuit 6d, respectively. By the operation error notification signal from the formatter 7, the operation error notification signal is sent to the DM by the operation error notification circuit 6d.
It is output to the A controller 4. Further, in the automatic operation stop circuit 6c, the automatic operation stop signal is output by the operation error occurrence signal or the operation error notification signal, whereby the operation of the ECC 6 is performed at a predetermined timing as soon as possible as described later. Will be stopped at.

The self-stop signal is also supplied to the register 6b built in the ECC 6. Further, the operation error detection circuit 6e supplies an operation error content signal indicating the kind of the operation error as described above to the register 6b, and the register 6b outputs the operation error content signal corresponding to the control signal from the microcomputer 3. Is output, and the restoration operation is performed.

As shown in FIG. 7C, the operation abnormality treatment circuit 7a of the formatter 7 includes a self-operation stop circuit 7c, an operation error notification circuit 7d, an operation error detection circuit 7e and the like.

When an operation error of the kind described above occurs in the formatter 7, the mechanical system controller 8 and the disk device 21, an operation error signal is output to the operation error detection circuit 7e.
The operation error detection circuit 7e detects the operation error, and the operation error occurrence signal is supplied to the self-operation stop circuit 7c and the operation error notification circuit 7d, respectively. In the operation error notification circuit 7d, an operation error notification signal is output to the ECC 6 according to the operation error occurrence signal. Also, the operation error notification signal from the ECC 6 is supplied to the self-operation stop circuit 7c. The self-operation stop circuit 7c outputs the self-operation stop signal in response to the operation error generation signal or the operation error notification signal, whereby the operation of the formatter 7 is performed at a predetermined timing as soon as possible, as described later. Be stopped.

The self-operation stop signal is also supplied to the register 7b built in the formatter 7. Also, the operation error detection circuit
The operation error content signal is supplied from 7e to the register 7d, and the status signal described above is output from the register 7b in response to the control signal from the microcomputer 3, whereby the restoration operation is performed.

As shown in FIG. 3A, in the recording mode, when the data number error occurs in the ECC 6 in the recording operation for the sector 3 during the recording operation for the sectors 1 to 5, ECC6 by the self-stop signal
The operation of the sector 4 is stopped and the DMA controller 4 is activated by the operation error notification signal.
And the operation of sector 4 in formatter 7 is stopped.

As shown in FIG. 7B, in the recording mode, when the collation error occurs in the ECC 6 in the collation operation for the sector 3 during the recording operation for the sectors 1 to 5, if the self-operation stop signal occurs, , The operation of sector 4 in ECC 6 is stopped and the operation of sector 4 in DMA controller 4 and formatter 7 is stopped by the operation error notification signal.

As shown in FIG. 6C, in the recording mode, when the address error occurs in the formatter 7 during the recording operation for the sector 3 during the recording operation for the sectors 1 to 5, the self-operation is stopped. The signal stops the operation of the sector 4 in the formatter 7, and the operation error notification signal stops the operation of the DMA controller 4 and the ECC 6 in the sector 4.

As shown in FIG. 3D, in the reproduction mode, sector 1
~ If the data number error occurs in the formatter communication unit of the ECC 6 for the sector 3 which is in the process of performing the reproduction operation for the sector 5, the self-operation stop signal causes the EC
Regarding sector 4 in the formatter communication part of C6, EC
The operation of the sector 3 in the processing unit of C6 and the DMA controller communication unit is stopped, and the operation of the sector 4 in the formatter 7 is stopped by the operation error notification signal. Since there is a margin, the sector 3 is instructed by the operation stop command from the microcomputer 3 as in the case of the conventional example.
Is done about.

As shown in (E) of the figure, in the reproduction mode, when the error correction impossible error occurs in the processing unit of the ECC 6 with respect to the sector 2 in the middle of performing the reproduction operation for the sectors 1 to 5, the operation is automatically stopped. According to the signal, for the sector 4 in the formatter communication unit of ECC6, the processing unit of ECC6 and
The operation of sector 3 in the DMA controller communication unit is stopped, and the DMA is sent by the operation error notification signal.
The operation of the sector 3 in the controller 4 and the operation of the sector 4 in the formatter 7 are stopped.

As shown in FIG. 6F, in the reproducing mode, when the address error occurs in the formatter 7 for the sector 3 in the middle of performing the reproducing operation for the sectors 1 to 5, the formatter 7 causes the formatter 7 to stop by the self-operation stop signal. 7, the operation of the sector 4 is stopped, and at the same time, the operation error notification signal is used to stop the operation of the sector 4 of the formatter communication unit of the ECC 6 and the operation of the sector 3 of the processing unit and the DMA controller communication unit, and the operation of the DMA controller 4 is stopped. Since there is a leeway in time, the stop is performed for the sector 3 by the operation stop command from the microcomputer 3 as in the case of the conventional example.

It should be noted that, in (D) and (F) of the figure, an example in which the operation of the DMA controller 4 is stopped by an operation stop command from the microcomputer 3 is described because there is time margin, but an operation error notification signal from the ECC 6 is described. Of course, you may go by

The control device 1 according to the embodiment of the present invention having the above-described configuration includes the DMA controller 4, the ECC 6, and the formatter 7 in each of the three constituent elements when the operation error occurs in the own element. The operation error generation signal supplied from the operation error detection circuits 6e and 7e, or the operation error notification signal supplied from the operation error notification circuits 6d and 7d of another element when an operation error occurs in another element By outputting the self-operation stop signal for stopping the operation of the self element at a predetermined timing as quickly as possible, the operation abnormality treatment circuits 4a, 6a and 7a having at least the self-operation stop circuits 4c, 6c and 7c. Compared with the conventional control device 51, when an operation error occurs, the timing is faster, that is, the operation error occurrence sector or operation error occurs in most cases. -Since the operation of the sector next to the generated sector is stopped, the restoration operation is smoothly performed, the total processing speed can be improved, and the processing capacity of the microcomputer 3 becomes small. It comes off. Furthermore, even if a fatal operation error such as a failure of the disk device 21 occurs, the risk of the recorded data recorded on the disk 22 being destroyed is reduced, and the reliability of this system is improved. .

(Effect of the Invention) In the control device of the information recording disk device of the present invention having the above-described configuration, when an operation error occurs, the operation is stopped at an early timing, so that the repair operation is smoothly performed, The total processing speed can be improved,
The operability and function of this system are improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a control device of a magneto-optical disk device which is an embodiment of a control device of an information recording disk device of the present invention, and FIG. 2 is an operation in each component of the control device of FIG. This is a block diagram of the abnormality countermeasure circuit. In the figure (A), DM
(A) Operation abnormality treatment circuit of the controller, (B) is an operation abnormality treatment circuit of ECC, (C) is an operation abnormality treatment circuit of the formatter, and (3) is an abnormality processing operation explanatory diagram in the control device of FIG. The same figure (A) shows the recording mode (recording operation)
In the case of an error in the number of data in the ECC at the time, the same figure (B) shows the case of the collation error in the ECC at the recording mode (the collation operation), and the figure (C) at the address error in the formatter in the recording mode (the recording operation) Figure (D) shows the case of error in the number of data in ECC in the playback mode.
Is an error uncorrectable error in the ECC in the reproducing mode, FIG. 4F is an address error in the formatter in the reproducing mode, and FIG. 4 shows an example of the magneto-optical disk used in the disk device of FIG. FIG. 1A is a bottom view, FIG. 1B is a partially enlarged cross-sectional view, and FIG. 5 is an example of a magneto-optical disk device controlled by the control device of FIGS. 1 and 7. Recording / playback operation explanatory diagram, FIG. 6 shows the first
7A and 7B are control operation explanatory views of the control device. FIG. 7A shows a recording mode, FIG. 7B shows a reproduction mode, and FIG. 7 shows an example of a conventional magneto-optical disk device control device. FIG. 8 is an explanatory diagram of an abnormal processing operation in the control device of FIG. 7, and FIG. 8A shows an address error in the formatter in the recording mode (recording operation), and FIG. This is the case of an error in the number of data in ECC during mode. 1 ... Control device, 2 ... Interface, 3 ... Microcomputer (microcomputer), 4 ... DMA controller (3 constituent elements), 5 ... Buffer memory, 6 ... Error correction circuit (ECC) (3 constituent elements), 7 ... Formatter ( 3 components), 4a, 6a, 7a ... operation abnormality treatment circuit (operation abnormality treatment means), 4c, 6c, 7c ... self-operation stop circuit, 6d, 7d ... operation error notification circuit, 6e, 7e ... operation error detection circuit , 11 ... Host computer, 21 ... Magneto-optical disk device (information recording disk device).

Claims (1)

[Claims] 1. A control device connected between a host computer and an information recording disk device for controlling the disk device, wherein at least a DMA controller, an error correction circuit and a formatter are controlled by a microcomputer. In the control device of the information recording disk device including the three constituent elements, the operation supplied from the operation error detecting circuit in the own element when an operation error occurs in at least the three constituent elements. Outputs a self-operation stop signal that stops the operation of its own element at a predetermined timing according to an error occurrence signal or an operation error notification signal supplied from the operation error notification circuit of another element when an operation error occurs in another element Is provided with an operation abnormality treatment means having at least a self-operation stop circuit for The control device of the broadcast recording disk apparatus.