JPH01279457A - Data recording/reproducing device - Google Patents

Abstract

PURPOSE:To prevent data in an adjacent track from being destroyed due to a shock from an external device by providing a function for inhibiting a data recording operation according to an output of an acceleration sensor. CONSTITUTION:When a shock is given from an external device during a write operation, a relative discrepancy is generated between a track center and a head center. An output in proportion to the strength of the shock from the outside is generated and inputted to a comparator 9 by the acceleration sensor 8. Whether or not the strength of the external shock falls within an allowable range is decided by the comparator 9, and when it is decided to be beyond the allowable range, a signal is outputted to stop the write operation of a write circuit 4. By this method, the data in the adjacent track can be prevented from being destroyed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data recording/reproducing device for recording/reproducing data on a recording medium.

[Prior Art] As devices for recording/reproducing data on a recording medium, there are hard disk devices, floppy disk devices, optical disk devices, optical cart devices, and the like. These devices are configured to record/reproduce data on tracks formed on a recording medium using magnetic heads or optical heads.

[Problem to be solved by the invention] When trying to increase the storage capacity of a conventional device of this type,
It is essential to narrow the track width and track pitch and increase the number of tracks. However, when the track width and track pitch are narrowed to increase the number of tracks, the magnetic head is moved by external impact, causing track misalignment, and in extreme cases, it may move onto adjacent tracks. Sometimes I put it away. If something like this happens while recording data,
This has the disadvantage that not only the data on the track cannot be reproduced, but also the data on the adjacent track is destroyed.

The present invention has been made in order to solve such conventional problems, and provides a data recording/reproducing method that can protect the recording track and adjacent tracks from shocks applied from the outside during data recording operation. The purpose is to provide equipment.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides data recording and
The reproducing apparatus is equipped with an acceleration sensor that detects acceleration in response to an externally applied impact, and is equipped with means for inhibiting a data recording operation in accordance with the output of the acceleration sensor.

[Function] With the above configuration, since there is a mechanism that prohibits data recording operation according to the output of the acceleration sensor, it is possible to prevent data on adjacent tracks from being destroyed by impact from outside the device. It can be prevented.

[Embodiment] FIG. 1 is a block diagram showing the operation of an embodiment of the present invention, in which l represents a magnetic disk, which is rotationally driven by a spindle motor (not shown). Reference numeral 2 denotes a magnetic head for recording and reproducing (hereinafter referred to as read or write) data on this magnetic disk lf. 3 is a read circuit that generates read data pulses from the sort signal reproduced by the magnetic head 2; 4 is a write circuit that causes write current to flow through the magnetic head 2; 5 is a read data and write operation between the magnetic head 2 and the host system 6. This is an interface circuit for exchanging messages between the middle and other controllers. 6 is an external host system, which is usually a personal computer, word processor, or the like. 7 is a control circuit that controls the operation of the entire device, 8 is an acceleration sensor that detects acceleration in response to an external shock applied to the device, and 9 is a comparator that detects when the output of this acceleration sensor 8 exceeds a certain value.

FIG. 2 is a top view showing the configuration of one embodiment of the present invention shown in FIG.
It is driven to reciprocate in the direction. Reference numeral 14 denotes a helad arm, which is attached to the lower side of a magnetic head 2 (not shown) for the back surface, and another magnetic head 2 for the front surface attached to the head carriage l OJ2 on the opposite side. A spring 15 is used to sandwich the magnetic disk l with an appropriate pressing force.

16 is a base that supports the entire device. Acceleration sensor 8
is fixed on the base 16 in a direction that allows it to detect acceleration in the illustrated y direction.

In the above configuration, the linear motor 13 drives the head carriage lO to position the magnetic head 2 on the corresponding track of the magnetic disk ih, and read and write operations are performed. If an impact in the y direction is applied from the outside during write operation, a relative shift will occur between the track center and the head center. 6 Acceleration sensor 8 generates an output proportional to the magnitude of the external impact and inputs it to comparator 9. do. The comparator 9 determines whether the current magnitude of external impact is within the allowable range, and if it is determined that it exceeds the allowable range, the light circuit 9
Outputs a signal to stop the write operation. This avoids destroying data on adjacent tracks. At this time, the data being written to the track becomes corrupted, but the host system 6 can verify the data after writing and write again.

Furthermore, as another embodiment, the output of the comparator 9 in FIG. . In that case, the output of the comparator 9 may not be input directly to the write circuit 4, but the write operation may be stopped through the control circuit 7.

Also, by adding an appropriate integration circuit etc. between the acceleration sensor 8 and the comparator 9, the integral value of the external force applied per unit time (
Alternatively, it may be determined whether the impulse (impulse) is within a permissible range.

The embodiment shown in FIG. 1 can be similarly applied to a magnetic disk device, an optical disk device, an optical card device, etc.

In addition to linear motors such as linear voice coil motors and linear stepping motors, rotary voice coil motors, stepping motors, and flangeless motors can be used as head drive motors.

[Effects of the Invention] As explained above, the present invention has the effect of protecting important data from destruction and increasing the reliability of the device by prohibiting the data write operation according to the output of the acceleration sensor. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the operation of an embodiment of the present invention, and FIG. 2 is a plan view showing the configuration of the embodiment of the invention shown in FIG. In the figure. l-Magnetic disk 2・Magnetic head 3: REIT circuit 4. Light circuit 5/interface circuit 6: Host system 7: Control circuit 8: Acceleration sensor 9: Comparator 10: Het carriage 11.12 Nigaite bar 13
: Linear motor 14: Het arm 15 spring 16: Base agent Patent attorney 1) Haru Kitatake Figure 2

Claims (1)

[Claims] A data recording/reproducing device comprising: an acceleration sensor that detects acceleration in response to an external impact applied to the data recording/reproducing device; and means for prohibiting data recording according to the output of the acceleration sensor. .