JPS6216272A - Hard disk device with trouble display - Google Patents

Abstract

PURPOSE:To facilitate the trouble shooting of a device by providing a step signal displaying circuit and a ready signal displaying circuit to be used as a means to detect and display the trouble in the circuit. CONSTITUTION:In a hard disk driver HDD including a read/write circuit 7, a driving interface circuit 4, a mechanical control circuit 3, etc., a step signal circuit as one of trouble displaying means is at the circuit 4, when the step pulse in a control signal 11 from a hard disk controller 1 is outputted, a monostable multivibrator is oscillated and a light emitting diode is light-emitted. The ready signal circuit of other displaying means is in the circuit 3, and the rotating period of a spindle motor 15 is supervised by the monostable multi-vibrator. Consequently, the circuit can grasp whether HDD is normal or abnormal and debugging can be effectively executed.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention has the following features: The present invention relates to a hard disk device, and particularly to a hard disk device with a failure indication that facilitates troubleshooting.

[Background of the invention]

In conventional devices, as described in the fixed disk device catalog published by Matsushita Electric Industrial Co., Ltd. or the 5-inch microdisk device catalog published by Fujitsu Limited, the hard disk driver operates only when selected by the hard disk controller. The information that the item was selected was simply displayed externally using a light emitting diode. However, this display alone lacks information and lacks consideration for troubleshooting the hard disk drive.

[Purpose of the invention]

An object of the present invention is to facilitate troubleshooting of a hard disk device, in other words, to provide a hard disk device with a failure indication that makes the above possible.

[Summary of the invention]

Conventional hard disk itts have almost no failure indication to the outside world by themselves, so when a hard disk does not work properly, it is possible to determine whether the problem is with the hard disk controller or the hard disk driver.
It was very difficult to separate.

Therefore, in order to facilitate identification, the present invention provides an internal failure detection circuit on the hard disk drive side, and displays the results externally using a light emitting diode or the like.

[Embodiments of the invention]

An embodiment of the present invention will be described below.

FIG. 2 shows the configuration of a hard disk driver device (hereinafter referred to as HDD), which is the object of the present invention, and each functional block has a built-in failure detection circuit.
FIG. 1 shows this information displayed externally. That is, FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

That is, 25.26 is a 5V power supply supplied from the outside, 1
A green light emitting diode indicates whether the 2V power is being supplied correctly, and 27 indicates whether the 5TBP signal (in control signal 11), which is a control signal from the hard disk controller that determines how much to move the head for HDD K, is normal. This is a green light emitting diode that indicates whether there is output from the hard disk controller. Further, 28 is a green light emitting diode that indicates whether the spindle motor in the HDD has reached normal rotation.

In the above case, green light is emitted under normal conditions.

Next, 30 is a light emitting diode that indicates whether the microprocessor in the mechanical control circuit of the HDD has gone out of control, and 29 is a light emitting diode that indicates whether or not the operation of the head during writing in the top has become abnormal. It is a red light emitting diode.

The above two light emitting diodes emit red light when an abnormality occurs.

Now, these display circuits will be explained using FIGS. 5 to 12.

First, the 5V source display circuit is located in the power supply input section 2 in FIG. 2, and the power supply is shown in FIG.

That is, the comparator 17 compares the Vin obtained by dividing the 5V power supply with the basic single voltage VR generated by the Zener diode 16, and if Vin>'RIF, the monostable multivibrator 18 does not oscillate. The output Q becomes L level and the light emitting diode 25 emits light, but if Vin has a ripple exceeding the specified value or Vin
If the 5V power supply is too low, such as < VRIν,
If the v power is not supplied, the light emitting diode 25 blinks or does not emit light to indicate an abnormality to the outside. The operation timing is shown in FIG.

A 12V power supply display circuit is also included in the power supply input section 2 shown in Figure 2, and is similar to the 5V power supply display circuit, so the explanatory diagram is shown in Figure 5.
It is only shown in FIG. 6 and the explanation will be omitted.

The next K5TEP signal display circuit is located in the drive interface circuit M in FIG.
It is displayed using the display circuit shown in the figure.

That is, when the 5TEP pulse signal is output from the hard disk controller, the monostable multivibrator 20 shown in FIG. 7 oscillates, and its output Q becomes as shown in FIG. 8, so that the light emitting diode 27 emits green light. At this time, the oscillation time of the monostable multivibrator 20 (the time when Q is at L level) is set to such an extent that the blinking of the light emitting diode 27 can be detected by the human eye.

Next, the ΦY signal display circuit is located in the mechanical control circuit 5 shown in FIG.
INDgX pulse 13 indicating the start of rotation is the 9th
The signal is input to the READY signal display circuit shown in the figure. The MY signal display circuit shown in Fig. 9 is composed of a monostable multivibrator 22 and a light emitting diode 28, and the firing time of the monostable multivibrator is a little longer than the rotation period of the spindle motor, which is 16.67 m5. If the rotation period is normal, IND[) (Russ period is 16
67, so the output Q of the monostable multivibrator is L.
maintain the level. Therefore, the light emitting diode 28 is in a light emitting state, but if the rotation period of the spindle motor slows down or the rotation stops, the light emitting diode 28 blinks or does not emit light, thereby indicating an abnormality to the outside.

Next, the CPU m general display displays the status of the microprocessor in the mechanical control circuit 5 of the HDD, and if the internal microprocessor goes out of control due to external noise or other factors, it will fetch undefined instructions. At this time, a microprocessor trap internal interrupt occurs, and the red light emitting diode 50 is turned on according to the flowchart shown in FIG. 11 to indicate an abnormality externally. .

Finally, the WRiTE FAULT display circuit shown in FIG. 12 is located inside the READ/WRiTE circuit 7 shown in FIG. The write width and read width of the head are determined by the WRi T EGATEM signal from the disk controller 1.
URRENT (FIG. 2, 15) is monitored, and if an abnormality is detected, the abnormality is indicated by the external pressure red light emitting diode 29.

As shown in FIG. 1, by equipping the above-mentioned display circuit to an I/- disk driver, the user can know the status of the I/- disk at a glance.

〔Effect of the invention〕

According to the present invention, the status of the hard disk driver, whether it is normal or abnormal, and the details of the abnormality can be grasped at a glance from the display circuit. This has the great effect of not only making it possible to debug efficiently, but also greatly reducing the number of troubleshooting steps during mass production shipment and operation.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of an embodiment of the present invention, FIG. 2 is an internal configuration diagram of a hard disk driver that is the object of the present invention, FIG. 3 is a circuit diagram showing a 5V power supply display circuit, and FIG. The figure shows its operation timing diagram, Figure 5 is a circuit diagram showing the 12V power display circuit, Figure 6 is its operation timing diagram, Figure 7 is a circuit diagram showing the s'rEp signal display circuit, and Figure 8 is its operation. Timing diagram: Figure 9 is a circuit diagram showing the RFADY signal display circuit; Figure 10 is its operation timing diagram;
FIG. 1 is a CPU ER processing flowchart, and FIG. 12 is a circuit diagram showing a WRi TE FAULT display circuit. 1: Hard disk controller 2: Power input unit 5: Mechanical control circuit 4 Drive interface circuit 5 Spindle motor drive circuit 6: Head actuator drive circuit 7: REA
D/WRiTg circuit 8: WRiTE GATE signal 9: WRiTE DATA 10: READ DATA 11: Control signal (from hard disk controller) H
EAD2'~22 D, RiVE 5ELECT s'rgp D i RgCT i 0N 12: Status signal NDEX EiADY SEEK COMPLgTE TRACKOOO WRiTB FAULT DRiVESELECTEI) 1s: INDEX pulse 1 4 Nihard disk driver () [) D ) 16: Zener diode 17: Comparator 18 Two monostable multivibrators 20: Monostable multivibrators 22: Monostable multivibrators 25-28: Green light emitting diodes 29-30: Red light emitting diodes 2.゛Nutase 4 (also number 3 a horse 40 5th Otsu 6th misunderstanding 7L v5v 6th misunderstanding 7 mouth 5V 5V 5V 10 mouth 11 mouth)

Claims (1)

[Scope of Claims] 1) In a hard disk drive including at least a read/write circuit, a head actuator drive circuit, a mechanical control circuit, and a power input section, a failure detection device for each part and a failure display means for externally displaying the results. A hard disk device with a failure indication, characterized by comprising: 2) In the hard disk drive with failure indication as set forth in claim 1, in the step signal display circuit as one of the failure indication means, a monostable multivibrator is provided and the oscillation time of the monostable multivibrator is adjusted. A hard disk device with a failure indication, characterized in that a light emitting diode blinks when a signal is input. 3) In the hard disk drive with failure indication according to claim 1, in the ready signal display circuit as one of the failure indication means, a monostable multivibrator is provided to monitor the rotation period of the spindle motor. A hard disk device with a failure indication.