JP2006107545A - Method for disabling magnetic disk apparatus, and information processing apparatus which can perform this method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for disabling a magnetic disk apparatus provided with a magnetic disk and a head reading data from the magnetic disk, and an information processing apparatus which can perform the method. <P>SOLUTION: A magnetic head 215 is moved on a cylinder of the innermost periphery (step S201). A spindle motor is controlled so that the number of times of rotation per a unit hour of a platter 21 become the prescribed number of times of rotation or less, (step S202) and the surface of the magnetic head 215 and the surface of the platter 210 comes into contact with each other (step S203). The magnetic head 210 being in contact with the surface of the platter 210 is moved to the cylinder of the outermost periphery from the cylinder of the innermost periphery while keeping a state in which it is in contact with the platter 210 (step S204). The surface of the platter 210 is scratched by moving the magnetic head 215 while it is in contact with the surface of the platter 210. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for disabling use of a magnetic disk device and an information processing apparatus capable of executing the method.

  In recent years, the disk capacity of magnetic disk devices mounted on information processing apparatuses has been increasing year by year. Further, as the disk capacity increases year by year, the number of shipped magnetic disk devices also increases year by year, and there is a tendency that many information processing apparatuses are equipped with magnetic disks.

Furthermore, as the number of shipped magnetic disk devices increases, there is a problem of how to process data that is still stored on the disks of the magnetic disk devices that are no longer used. As a method of processing data that is still stored in the disk of the magnetic disk device, there is a technique in which when the opening of the hard disk device is detected, the recording surface is mechanically broken using a rigid protrusion (Patent Document 1). reference.).
Japanese Unexamined Patent Publication No. 2004-55020 (page 3, FIG. 3)

  However, the technique described in Patent Document 1 provides the hard disk device with a rigid protrusion for mechanically breaking the recording surface of the hard disk device. Therefore, the cost required for manufacturing the hard disk device further requires the cost of a rigid protrusion for mechanically destroying the recording surface.

  SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for disabling use of a magnetic disk device without specially providing a member for disabling the magnetic disk, and an information processing apparatus capable of executing the method. To do.

  In order to achieve the above object, a method of disabling a magnetic disk device comprising a magnetic disk and a head for reading data from the magnetic disk according to claim 1, wherein the magnetic disk device is in an operating state, and the head A first moving step for moving the magnetic disk to one of the inner circumference and the outer circumference of the magnetic disk, a step of bringing the head into contact with the magnetic disk by reducing the rotational speed of the magnetic disk, and the magnetic disk and the head And a second moving step for moving the head from one of the inner circumference and the outer circumference of the disk to the other circumference while maintaining a state in contact with the disk.

  5. The information processing apparatus having a magnetic disk device according to claim 4, wherein the input unit, the magnetic disk device are a magnetic disk, a head for reading data from the magnetic disk, and a first drive for moving the head. And the second drive unit for controlling the rotational speed of the disk, and the head is moved from one of the inner circumference or the outer circumference of the magnetic disk to the other circumference based on the operation of the input unit by the user. Of the inner and outer circumferences of the disk while maintaining the state where the disk and the head are in contact with each other. And a control unit that moves the head from one of the circumferences to the other circumference by the first driving unit.

  According to the present invention, it is possible to provide a method for disabling use of a magnetic disk device including a magnetic disk and a head for reading data from the magnetic disk, and an information processing apparatus capable of executing the method.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, an example of the system configuration of the information processing apparatus will be described with reference to FIG. This information processing apparatus is realized as, for example, a notebook personal computer (hereinafter referred to as a computer) 1.

  A CPU 10, a memory 13, a graphics controller 15, and an I / O hub 20 are connected to the host hub 11.

  The host hub 11 is a bridge device that connects the system bus 12 of the CPU 10 and the I / O hub 20. The host hub 11 incorporates a memory controller that controls access to the memory 13.

  The CPU 10 is a processor provided for controlling the operation of the computer 1. The CPU 10 executes an operating system (OS) and various application / utility programs that are loaded from the hard disk drive (HDD) 21 that is an external storage device to the memory 13 via the memory bus 14. The CPU 10 also executes a BIOS (Basic Input Output System) stored in the BIOS-ROM 22.

  A graphics controller 15 connected to the host hub 11 via the AGP bus 16 controls an LCD 18 used as a display monitor of the computer 1. The graphics controller 15 has a video memory (VRAM) 17 and displays data drawn in the video memory 17 by the OS / application program on the LCD 18.

  An I / O hub 20 connected to the host hub 11 through a dedicated bus such as a hub interface controls each device on a peripheral component interconnect (PCI) bus 23 and each device on a low pin count (LPC) bus 22. The I / O hub 20 incorporates an IDE (Integrated Drive Electronics) controller for controlling the HDD 21 that is an external storage device.

  The HDD 21 is connected to the I / O hub 20 via the ATA bus 21a. The HDD 21 stores an operating system (OS), various applications / utility programs, and data created by the user by using application programs.

  The HDD 21 is provided with a controller 21b that controls various controls performed in the HDD 21.

  An embedded controller / keyboard controller IC (EC / KBC) 23 is connected to the LPC bus 22.

  The embedded controller / keyboard controller IC (EC / KBC) 23 is a one-chip microcomputer in which an embedded controller for power management and a keyboard controller for controlling the keyboard (KB) 29 are integrated. The EC / KBC 23 has a function of powering on / off the computer 1 in accordance with the operation of the power button by the user. The EC / KBC 23 is connected with a keyboard 29, a PSC (Power Supply Controller) 30, and a main switch 39. An AC power supply 31 and a secondary battery 32 are connected to the PSC 39.

  The keyboard 29 is an input unit. The keyboard 29 is composed of a group of keys engraved with letters, kana, numbers, symbols, and the like. When the user presses these keys, the characters assigned to the keys are input to the computer 1. Is done.

  The main switch 39 is a switch that is pushed down when power supply to a module group constituting the computer 1 is started. The EC / KBC 23 detects that the main switch 39 has been pressed, and notifies the PSC 30 to supply power to each module from the AC power supply 31 or the secondary battery 32. Next, the hardware configuration of the HDD 21 will be described.

  FIG. 2 is a diagram illustrating an example of a hardware configuration of the HDD. The HDD 21 includes a platter (magnetic disk) 210, a spindle motor 211, a voice coil motor (VCM) 217, a pivot shaft 213, a swing arm 214, a voice coil motor IC, a head-up IC 218, and the like.

  The platter 210 is a magnetic disk coated or vapor-deposited (sputtered) with a magnetic material, and stores and holds data. The spindle motor 211 is a motor that drives the platter 210 to rotate.

  A swing arm 214 is attached to the voice coil motor (VCM) 217. The swing arm 214 is connected to the pivot shaft 213. A magnetic head 215 is provided at the other end of the swing arm 214 with respect to the connection portion between the swing arm 214 and the voice coil motor 217.

  The voice coil motor 217 moves the magnetic head 215 to an arbitrary track position on the platter 210. By controlling the amount of current supplied from the voice coil motor IC and head-up IC 218 to the voice coil motor (VCM) 217 via the flexible cable 216 and controlling the swing amount of the swing arm 214, the magnetic head 215 is placed on the platter 210. Move to any position.

  The magnetic head 215 reads data stored in the magnetic recording layer on the surface of the platter 210 and writes data in the magnetic recording layer.

  Reading of data from the platter 210 and writing of data from the platter 210 by the magnetic head 215 are performed while maintaining a state where the magnetic head 215 and the platter 210 are not in contact with each other. The spindle motor 211 is driven at a high speed rotation, for example, 10,000 revolutions / minute, and an air flow is generated between the platter 210 and the magnetic head 215, thereby maintaining a state where the magnetic head 215 is lifted from the platter 210. Next, an example of a procedure for disabling the HDD 21 will be described.

  FIG. 3 is a first flowchart illustrating an example of a procedure for disabling the HDD 21. FIG. 4 is a diagram illustrating an example of a screen displayed on the LCD when the BIOS is set.

  If the user wants to disable the HDD 21 (Yes in step S100), the user performs a BIOS setting start operation after pressing down the main switch 39 of the computer 1 (step S101).

  After the user performs a BIOS setting start operation, for example, a screen d1 shown in FIG. In response to the message content on the screen d1, the user inputs Y, which is one of the keys on the keyboard 29, to start processing for disabling the HDD 21 (step S102).

  FIG. 5 is a second flowchart illustrating an example of a procedure for disabling the HDD 21. FIG. 6 is a view showing an example of a screen displayed on the LCD 18 after the HDD 21 is disabled.

  After the user instructs the BIOS to disable the HDD 21 by the BIOS setting operation, the BIOS transmits a command for starting the processing of disabling the HDD 21 to the controller 21a provided in the HDD 21 (step S200).

  When the controller 21a receives the processing start notification from the BIOS, the controller 21a controls the voice coil motor (VCM) 217 to move the magnetic head 215 in the cylinder on the platter 210, for example, on the innermost cylinder ( Step S201). The magnetic head 215 is not necessarily moved to the innermost cylinder on the platter 210, and may be moved to an inner cylinder close to the spindle motor 211 in the cylinder group on the platter 210.

  After the process of step S201, the controller 21a controls the spindle motor 211 so that the number of rotations per unit time of the platter 210 is equal to or less than the predetermined number of rotations (step S202). When the number of rotations of the platter per unit time becomes equal to or less than the predetermined number of rotations, the magnetic head 215 and the surface of the platter 210 come into contact with each other (step S203).

  After the process of step S203, the magnetic head 215 that is in contact with the surface of the platter 210 is brought into contact with the surface of the platter 210 by increasing the amount of current that the voice coil motor IC and the head-up IC 218 supply to the voice coil motor 217. The cylinder is moved from the innermost cylinder to the outermost cylinder while maintaining this state (step S204). The surface of the platter 210 is damaged by moving the magnetic head 215 while making contact with the surface of the platter 210.

  After the magnetic head 215 is moved from the innermost cylinder to the outermost cylinder in the process of step S204, the magnetic head 215 is further moved from the outermost cylinder to the innermost cylinder.

  When the movement process of the magnetic head 215 on the platter 210 has been performed a predetermined number of times (step S205 Yes), the controller 21a notifies the BIOS that the process of disabling the HDD 21 has been completed (step S206).

  When the BIOS receives the process end notification from the controller 21a, for example, a screen d2 shown in FIG. The user confirms that the HDD 21 has become unusable by looking at the message content on the screen d2.

  After the magnetic head 215 is moved to the inner periphery or outer periphery of the platter 210, the magnetic head 215 is moved from the inner periphery while maintaining the state in which the magnetic head 215 and the platter 210 are in contact with each other by reducing the rotation speed of the platter 210. By moving to the outer periphery or from the outer periphery to the inner periphery, the surface of the platter 210 can be damaged. Therefore, the data stored in the platter 210 of the HDD 21 can be destroyed by using the existing mechanism of the HDD 21 without providing the HDD 21 with a special member for scratching the surface of the platter 210. .

  Furthermore, since the user can perform an operation to disable the HDD using the BIOS setting mode, the HDD can be disabled very easily. In addition, when the BIOS is started after the HDD is disabled, the BIOS cannot recognize the HDD and is notified on the display screen, so that the user can easily recognize that the HDD is disabled. Is possible.

  In the above-described embodiment, the HDD has been described as an example. However, the present invention is not limited to the HDD, and may be an MO (Magneto-Optical disk) drive device or the like.

  Further, in the embodiment described above, a system in which an HDD is incorporated in a personal computer has been described as an example. However, the above description has been made on an HDD alone in which a jumper switch is appropriately set and power is supplied. A method of disabling the HDD may be applied.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

2A and 2B illustrate an example of a system configuration of an information processing device. The figure which shows an example of the hardware constitutions of HDD. The 1st flowchart explaining an example of the procedure for making an HDD unusable. The figure which shows an example of the screen displayed on LCD at the time of BIOS setting. The 2nd flowchart explaining an example of the procedure for making HDD unusable. The figure which shows an example of the screen displayed on LCD after disabling HDD.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information processing apparatus, 21 ... HDD, 21b ... Controller,
210 ... platter, 211 ... spindle motor, 213 ... pivot shaft,
214 ... Swing arm, 215 ... Magnetic head,
217 ... Voice coil motor (VCM),

Claims (6)

In a method for disabling a magnetic disk device comprising a magnetic disk and a head for reading data from the magnetic disk,
A first movement step of moving the head to any one of an inner circumference and an outer circumference of the magnetic disk while the magnetic disk device is in an operating state;
Reducing the rotational speed of the magnetic disk to bring the head into contact with the magnetic disk;
A second moving step of moving the head from one of the inner circumference and the outer circumference of the disk to the other circumference while maintaining the state in which the magnetic disk and the head are in contact with each other;
A method of disabling a magnetic disk device, comprising: After moving the head from one of the inner circumference and the outer circumference of the disk to the other circumference, the disk is further moved from the other circumference to any one of the inner circumference and the outer circumference. 2. The method according to claim 1, further comprising a third moving step of moving the head. Allowing the user to select whether or not to perform a process for disabling the magnetic disk;
2. The method of disabling a magnetic disk device according to claim 1, further comprising: notifying a user that processing for disabling the magnetic disk has been performed. In an information processing apparatus including a magnetic disk device,
An input section;
The magnetic disk device includes:
A magnetic disk;
A head for reading data from the magnetic disk;
A first drive unit for moving the head;
A second drive unit for controlling the rotational speed of the disk;
Based on the operation of the input unit by the user, the head is moved from one of the inner circumference or outer circumference of the magnetic disk to the other circumference by the first driving unit, and the disk, the head, From the circumference of either the inner circumference or the outer circumference of the disk while maintaining the state in which the disk and the head are in contact with each other, the second drive unit controls the rotation speed so that A control unit that moves the head to the other circumference by the first driving unit;
An information processing apparatus comprising: The control unit moves the head from one of the inner circumference and the outer circumference of the disk to the other circumference, and then further moves any one of the inner circumference and the outer circumference from the other circumference. An information processing apparatus, wherein the head is moved around the periphery by the first driving unit. A display unit;
A program for starting the system of the information processing apparatus,
The program is
Means for causing the display unit to display a screen for allowing the user to select whether or not to perform processing for disabling the magnetic disk;
Means for displaying on the display unit a screen for notifying the user that processing for disabling the magnetic disk has been performed;
An information processing apparatus comprising:

Images