JPH03295067A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To stabilize the input and output of a data by trying again the data input and output under execution in a prescribed unit when a mechanical shock and vibration more than their prescribed levels are impressed upon a mechanism part. CONSTITUTION:When physical shock and vibration, etc., are impressed upon a hard disk unit 1, an acceleration sensor 2 is rigidly fixed in a place where the same shock and vibration are given. An output of the sensor 2 is amplified by an amplifier 3 having a prescribed amplification factor, and is compared by a comparator 4 with a reference voltage obtained by dividing a power source voltage, etc., and then when the vibration and shock more than specific values are impressed upon the unit 1, an active signal is inputted from the comparator 4 to an interruption controller 6, and hardware interruption is worked on a CPU 7. Subsequently, whether a data is read or not from the unit 1 is decided by the CPU 7. The read is performed again from an address where the read of the data from the unit 1 is commenced, and the write of the data is performed again.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording/reproducing apparatus, and particularly to an information recording/reproducing apparatus that inputs and outputs data to and from a predetermined information medium.

[Prior Art] Hard disk drives have been widely used as external storage means in information processing equipment such as computer systems and word processors.

Recent advances in the size and weight of hard disk drives have been remarkable, and in recent years they have been installed in laptops and other personal computers.

[Problems to be Solved by the Invention] Hard disk drives are susceptible to shocks during operation because they perform recording and reproduction with magnetic heads that face the magnetic media that rotates at high speed in a non-contact state. There are concerns about the reliability of the data if a shock occurs.

Therefore, in applications such as laptop personal computers that are expected to be subjected to vibrations and shocks during operation, such as when being carried, consideration must be given to the reliability of data input and output.

The above problems are common not only to information recording and reproducing apparatuses that use magnetic media but also to information recording and reproducing apparatuses that use other information media.

SUMMARY OF THE INVENTION In view of one or more problems, it is an object of the present invention to provide an information recording and reproducing device that can stably input and output data regardless of mechanical vibrations and shocks during operation.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an information recording and reproducing apparatus that inputs and outputs data to and from a predetermined information medium. A means for detecting mechanical shock or vibration applied to a mechanical part that performs input/output, and a case where a mechanical shock or vibration of a predetermined value or more is applied to the mechanical part according to the output of the detection means. , we adopted a configuration that includes a control means that retries the data input/output being executed at a predetermined rate.

[Operation] According to the above configuration, when shock or vibration is applied to a mechanical part that performs data input/output to an information medium, the data input/output being executed is retried in a predetermined unit.

[Example 1] Hereinafter, one of the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 shows the structure of an information recording/reproducing apparatus employing the present invention. In FIG. 1, reference numeral 1 denotes a hard disk unit, which is comprised of a known disk, head drive section, control section, and the like.

The hard disk unit l is connected to a host system (computer system, word processor, etc.) via an SC3I interface or the like. Communication with the host system and data input/output to the disk are controlled by the control circuit on the right side of the figure. The CPU 7 is composed of a microprocessor and the like, and controls the operation of the hard disk unit 1 via the hard disk controller 9 according to a program stored in the ROM 8.

When a physical shock or vibration is applied to the hard disk unit 1, such as the chassis of the hard disk unit 1, the acceleration sensor 2 is rigidly fixed at a location where the same shock or vibration is applied.

The acceleration sensor 2 has a known configuration using a piezoelectric element or the like.

The output of the acceleration sensor 2 is sent to an amplifier 3 with a predetermined amplification factor.
It is amplified by the comparator 4 and compared with the base 4 voltage obtained by dividing the power supply voltage, etc. If vibration or shock exceeding a specified value is applied to the hard disk unit l, the comparator 4 sends an active signal to the interrupt controller 6. The configuration is such that a signal is input manually and a hardware interrupt is applied to the CPU 7.

Next, the operation of the above configuration will be explained.

FIG. 2 shows the flow of a control procedure executed by the CPU 7 in FIG. 1 in response to an interrupt from the interrupt controller 6.

When an interrupt signal is generated from the acceleration sensor 2 at step St in FIG. 2, the CPU 7 determines whether data is being read from the hard disk unit I via the hard disk controller 9 at step S2. If step S2 is affirmed, the process moves to step S3, and if negative, the process moves to step S4.

If there is no interruption from the acceleration sensor 2, it is similarly determined in step S4 whether data is being written to the hard disk unit l. If step S4 is affirmative, the process advances to step S5, and if negative, the interrupt process is terminated.

In step S3, data is read from the address at which data reading from the hard disk unit is started, and data is output from the host device.

On the other hand, in step S5, data is written again from the address at which data writing to the hard disk unit 1 was started. When steps S3 and S5 are completed, the interrupt processing is ended.

According to the above configuration, when the acceleration sensor 2 applies a physical vibration or shock of a predetermined value or more to the hard disk unit 1, if the data input/output to the hard disk unit 1 is in progress, the data input/output in progress is interrupted. Since retries are automatically executed, data input/output can be performed reliably even when physical vibrations or shocks are applied.

Therefore, the host device is a laptop personal computer or the like incorporating the illustrated hard disk device (in this case, the CPU 7 is the host side CPUf!:
May also serve as ) It has the excellent effect of ensuring constant data input/output even in applications where physical vibrations and shocks are expected, such as during mobile operation.

It goes without saying that the above configuration may be implemented not only in applications of portable devices but also in desktop devices. Moreover, although a hard disk device has been exemplified above, it goes without saying that a similar configuration can be implemented in devices using other information media where vibrations and shocks are a problem.

[Effects of the Invention] As is clear from the above, according to the present invention, in an information recording and reproducing apparatus that inputs and outputs data to a predetermined information medium, a mechanism that inputs and outputs data to and from the predetermined information medium is provided. A means for detecting a mechanical shock or vibration applied to a part, and a means for detecting a mechanical shock or vibration applied to the mechanical part, according to the output of the detection means. Since the configuration is equipped with a control means that retries the output in predetermined units, if mechanical shock or vibration is applied to the mechanism that inputs and outputs data to the information medium, the data input that is being executed will be interrupted. Shocks to the pig input/output mechanism by forcing the output to be retried in predetermined units,
It has the excellent effect of allowing stable data input/output at all times regardless of the state of vibration application.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of a hard disk device employing the present invention, and FIG. 2 is a flowchart showing the interrupt control procedure of the device of FIG. ■--Hard disk unit 2--Acceleration sensor 3--Amplifier 4--Comparator 5--Resistance circuit 6--Interrupt controller 7--CPU 8
-...ROM 9...-Hard disk controller rough

Claims (1)

[Scope of Claims] 1) In an information recording and reproducing device that inputs and outputs data to and from a predetermined information medium, a mechanical shock applied to a mechanical part that inputs and outputs data to and from the predetermined information medium; means for detecting vibration; and control for retrying the data input/output being executed in a predetermined unit when a mechanical shock or vibration of a predetermined value or more is applied to the mechanical part according to the output of the detecting means. An information recording/reproducing device characterized by being provided with means.