JP2006024326A - Hard disk device which can alter disk rotational speed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vibration by selecting rotational speed of a disk inside a hard disk device based on a vibration detection means or a rotational speed setting means mounted on the hard disk device without depending on a host device, a host OS or an application program for disk rotation control. <P>SOLUTION: The hard disk drive device is equipped with a disk shape recording medium 214 for reading or writing information, a motor 213 capable of rotationally driving the disk shape recording medium at multiple rotational speeds and a rotational speed selection part 203 for setting up one rotational speed among the multiple rotational speeds. A vibration sensor 202 is mounted on the hard disk device itself, the rotational speed selection part sets up one rotational speed by the output from the vibration sensor (204). By this setup, the vibration of the chassis for covering an information processing device including the hard disk device is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk drive device that rotationally drives a disk-shaped recording medium such as a magnetic disk. In particular, the rotational speed of a hard disk device mounted on the information processing device is automatically set by vibration of the information processing device housing. The present invention relates to a hard disk device that is changed according to a manual setting of the hard disk device itself.

  As a technique for ensuring the reliability of data against external vibration to the hard disk device, mounting a vibration detection unit on the hard disk device and using the vibration detected by the vibration detection unit is disclosed in, for example, Patent Document 1. Is disclosed. According to this, measures against vibration are taken by increasing the head flying height from the disc-shaped recording medium based on the detected vibration.

For example, Patent Document 2 discloses changing the rotation speed of a spindle motor in a hard disk device in accordance with an instruction from a host device externally connected to the hard disk device. According to this, the rotational speed of the spindle motor is controlled using control software on the host device. This control software depends on the OS of the host device, and the rotation speed can be controlled only when the OS is operating normally.
JP 2003-346445 A JP2001-222380

  By the way, in actual operation, a plurality of hard disk devices are mounted and operated in the information processing system device, and vibrations generated when the disk-shaped recording medium inside the hard disk device is rotationally driven are affected by the information processing system device. It becomes a continuous external vibration to other hard disk devices mounted via the frame. Under such conditions, when the technique of Patent Document 1 described above is applied, processing cannot be performed only on a vibration source outside the hard disk device, and the head is affected by vibrations from other hard disk devices. The state in which the flying height increases continues, causing a problem that normal operations of the hard disk device such as read / write cannot be performed.

  Further, in Patent Document 2 described above, the rotational speed control by the control software is performed only when the host device is operating normally, the host OS is operating normally, and the control software (dedicated application program) is operating normally. The speed cannot be controlled. Therefore, when a failure occurs in the host device, there arises a problem that the rotational speed control becomes impossible.

  The object of the present invention is not to depend on the host device, the host OS, and the disk rotation control application program, but based on the vibration detecting means or the rotational speed setting means mounted on the hard disk device, the rotational speed of the disk inside the hard disk device. Is to provide a hard disk device that reduces vibrations.

In order to solve the above problems, the present invention mainly adopts the following configuration.
A disk-shaped recording medium for reading or writing information; a motor capable of rotating the disk-shaped recording medium at a plurality of rotation speeds; and a rotation speed selection section for setting one rotation speed among the plurality of rotation speeds. A hard disk device comprising:
A vibration sensor is mounted on the hard disk device itself,
The rotation speed selection unit sets the one rotation speed according to an output from the vibration sensor,
According to the setting, the vibration of the casing covering the hard disk device is reduced.

  According to the present invention, the disk rotation speed is controlled based on the automatic setting by the vibration detecting means of the hard disk device mounted in the information processing apparatus or the manual setting of the operable rotation speed, that is, the setting in the hard disk device itself. be able to.

  In addition, vibration, noise, heat generation, etc. generated from the hard disk device can be reduced by controlling the disk rotation speed. Furthermore, it is possible to extend the life of the hard disk device by reducing the heat generated from the hard disk device.

  A hard disk device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of an information processing apparatus equipped with a hard disk device according to an embodiment of the present invention. FIG. 2 is a block diagram showing an internal configuration of the hard disk device according to the present embodiment. FIG. 3 is a configuration diagram of a hard disk device in which the vibration sensor according to the present embodiment is installed. FIG. 4 is a flowchart showing the operation of the hard disk device according to the present embodiment.

  In FIG. 1, 101 is an information processing apparatus (for example, PC server), 102 is an installed hard disk drive (HDD), 103 is a CD-ROM drive, 104 is a power supply unit, 105 is a control unit, 106 is a motherboard, and 107 is a housing. , 108 represents an HDD support unit, and 109 represents a replacement HDD. In FIG. 1, the hard disk drive (HDD) 102 is suppressed from vibration caused by the rotation of the HDD by the HDD support unit 108 and the housing 107 of the information processing apparatus 101. In the illustrated example, the HDD 102 operates at a rotation speed of n rotations / minute, and five HDDs 1, 2, 3, 3, 4, and 5 are mounted. Since the vibration generated from the HDD is determined by the rotation speed n, the structure and material of the housing 107 including the HDD support portion 108 are determined so as to suppress this resonance vibration.

  First, the outline of the present invention will be described. Now, the information processing apparatus 101 (which may be a PC server as an example) on which an HDD of n rotations / minute is mounted responds to an increase in data to be stored, or there is a malfunction of n rotations / minute. In order to replace the HDD, when the HDD (n <j, k, m) is installed instead of the HDD of n rotation / minute, the rotation of j rotation / minute, k rotation / minute, or m rotation / minute is installed. When different HDDs are replaced as they are (for one or more HDDs), vibrations due to the replaced HDDs are generated, and the support unit 108 and the casing 107 (hereinafter referred to as the casings) are vibration-proof structures corresponding to the generated vibrations. Therefore, if the housing vibrates and pulls, the HDD vibrates, causing a failure in the recording / reproducing function. In order to avoid this, it is conceivable to change the vibration-proof structure of the housing. However, in the present invention, vibration due to the replaced HDD is detected, and the rotational speed of the replacement HDD is controlled to change based on this detected vibration. The feature is to prevent vibration.

  In other words, with a specific example, when there is a request for expansion of a hard disk device under a situation where the old hard disk device in operation cannot be obtained due to production stop, another hard disk device that is currently available (J, k, m rotations / minute (n <j, k, m)) must be used as an alternative or replacement, but the housing of the old information processing apparatus starts from j, k, m rotations / minute If it is not compatible with vibration, there is a high possibility that the vibration will increase and troubles such as off-track light may occur in the hard disk device. When the vibration of the housing of the information processing device is measured by a vibration sensor mounted on the hard disk and the vibration is large, the hard disk device that changes the rotation speed of the disk is used to change from j, k, m rotations / minute to n rotations / minute. The vibration is reduced by changing the rotation speed in minutes, and the information processing apparatus can be mounted on the housing as it is.

  Next, the configuration of the hard disk device according to the present embodiment will be described with reference to FIG. 2. The hard disk device 201 includes a vibration detection unit 202, a rotation speed selection unit 203, a read / write frequency generation circuit 205, a rotation speed control circuit 207, and a read. A write data processing circuit 209, a spindle motor rotation speed detection circuit 211, a spindle motor driver 212, a spindle motor 213, and a disk-shaped recording medium 214. The hard disk device 201 includes components other than those described above, such as a hard disk controller, a microcomputer, a voice coil motor, a motor driver, a read / write channel, a RAM, a disk interface controller, a power connector, and the like. Or may be provided.

  Here, the vibration detecting means 202 is for detecting vibrations to the hard disk device, and the rotational speed selecting means 203 is for selecting the rotational speed of the disc-shaped recording medium 214 mounted as hardware on the hard disk device 201. is there. The rotation speed selection means 203 is mounted as a rotation speed selection means according to the result of measuring the vibration of the housing of the information processing apparatus on which the hard disk device is mounted using the vibration detection means 202.

  The mounting of the vibration sensor 202 as vibration detecting means on the hard disk device will be described with reference to FIG. The hard disk device 301 includes a disk-shaped recording medium 302, a head stack assembly 303, a signal line 304, a base / printed circuit board connection unit 305, and a vibration sensor 1 (306) mounted on the surface of the hard disk device. The vibration sensor 2 (307), the vibration sensor 3 (308), and the printed circuit board 309 are mounted. Then, the data on the disk-shaped recording medium 302 is read by the head stack assembly 303, and a signal is transmitted to the printed circuit board 309 via the signal line 304 and the base / printed circuit board connection unit 305. At this time, the vibration sensor 1 (306) that measures the vibration of the housing of the information processing device in the Z direction is used as a base / printed circuit board connection portion, and the vibration sensor 2 that measures the vibration of the housing of the information processing device in the X direction. (307) is mounted on the printed circuit board 309, and the vibration sensor 3 (308) for measuring the vibration of the housing of the information processing apparatus in the Y direction is mounted on the printed circuit board 309.

  The rotation speed setting 204 is selected by the rotation speed selection means 203 and sets the rotation speed of the disc-shaped recording medium 214. The vibration sensor 202 detects vibration in any one of the X, Y, and Z directions as shown in FIG. 3, and specifically, detects vibration amplitude and frequency. The rotation speed selection means performs an appropriate rotation speed setting 204 when the vibration amplitude reaches a threshold value by the output from the vibration sensor 202 (which may be a vibration sensor that detects vibration in any one direction).

  There are various methods for selecting the rotational speed setting for the output from the vibration sensor. However, it is possible to set the rotational speed setting lower than the output frequency in order and detect the vibration each time. A conversion table between the detected frequency and various rotation speed settings is prepared in advance, and the rotation speed selection means may set based on this table, or the initially set rotation speed setting may be selected. . Furthermore, instead of detecting the vibration frequency, only the vibration amplitude may be detected, and the rotation speed may be set appropriately so that the amplitude does not reach the threshold value.

  Although not shown, manual rotation speed setting may be used instead of the automatic rotation speed setting by the vibration sensor described above. Specifically, as shown in the figure, it may be configured so that various rotation speeds can be set, and a jumper pin connection manual setting or a fuse cutting manual setting may be performed on the connection terminal. Also, any one of the rotation speed settings 204 shown in FIG. 2 may be performed by an external software instruction. Such manual setting may be input manually when a new replacement HDD is mounted on the information processing apparatus.

  The read / write frequency generation circuit 205 generates a frequency at which the magnetic head 210 and the read / write data processing circuit 209 read / write data on the disk-shaped recording medium 214. The read rat frequency table 206 corresponds to the rotation speed selection means 203 and the rotation speed setting 204. The rotation speed control circuit 207 rotates the spindle motor 213 at an arbitrary rotation speed selected by the rotation speed selection means 203 and the rotation speed setting 204, so that the spindle motor detected by the spindle motor rotation speed detection circuit 211 is detected. The rotation speed information of 213 is compared with the selected arbitrary rotation speed and the corresponding rotation speed reference signal 208, and the information for rotating the spindle motor 213 at the selected arbitrary rotation speed is displayed as the spindle motor. Control is performed by transmitting to the driver 212.

  Reference numeral 208 denotes a rotational speed reference signal corresponding to the rotational speed selection means 203 and the rotational speed setting 204. Reference numeral 209 denotes a frequency generated by the read / write frequency generation circuit 205, which represents a read / write data processing circuit that reads / writes data on the disk-shaped recording medium 214 using the magnetic head 210. Reference numeral 210 denotes a magnetic head for reading / writing data on the disk-shaped recording medium 214. Reference numeral 211 denotes a spindle motor rotation speed detection circuit that detects the rotation speed of the spindle motor 213. Reference numeral 212 denotes a spindle motor driver that controls the rotational operation of the spindle motor 213. Reference numeral 213 denotes a spindle motor for rotating the disk-shaped recording medium 214. Reference numeral 214 denotes a disk-shaped recording medium on which data is recorded.

  Next, the operation flow of the hard disk device according to the present embodiment will be described with reference to FIGS. Based on the vibration detected using the vibration detection means 202 mounted on the hard disk device 201, an arbitrary rotation speed is selected and set from the rotation speed setting 204 using the rotation speed selection means 203 (S401). Next, information on the rotation speed selected by the rotation speed selection means 203 when the hard disk device is activated is transmitted to the read / write frequency generation circuit 205 (S402). A frequency corresponding to the selected rotation speed in the read / write frequency table 206 connected to the read / write frequency generation circuit 205 is selected (S403). Subsequently, frequency information is transmitted to the read / write data processing circuit 209 (S404).

  Similarly, information on the rotational speed selected by the rotational speed selection means 203 is transmitted to the rotational speed control circuit 207 (S406). Next, a rotation speed reference signal corresponding to the selected rotation speed of the rotation speed reference signal 208 connected to the rotation speed control circuit 207 is selected (S407). Further, the spindle motor rotation speed detection circuit 211 detects the rotation speed of the spindle motor 213 for rotating the disk-shaped recording medium 214 and transmits the information to the rotation speed control circuit 207 (S408). The rotation speed control circuit 207 compares the transmitted rotation speed information of the spindle motor 213 with the selected rotation speed reference signal, so that the rotation speed of the spindle motor 213 is the same as the selected rotation speed. Is transmitted to the spindle motor driver 212 (S409). The spindle motor driver 212 controls the rotational speed of the spindle motor 213 using the information transmitted from the rotational speed control circuit 207 (S410). The spindle motor 213 is controlled in rotation speed by the spindle motor driver 212 and rotates the disc-shaped recording medium 214 at the rotation speed selected by the user (S411).

  The read / write data processing circuit 209 controls the magnetic head 210 using the frequency selected and transmitted by the read / write frequency generation circuit 205 to read data on the disc-shaped recording medium 214 at the selected frequency. / Write (S405).

  As described above, the configuration example of the hard disk device according to the embodiment of the present invention mounts the rotation speed selection means which is a hardware device and the vibration detection means connected to the rotation speed selection means. The rotation speed selection means is connected to a rotation speed control circuit and a read / write frequency generation circuit mounted on the hard disk device by wiring. Further, in order to control the rotation speed of the disk-shaped recording medium inside the hard disk device, a rotation speed is selected from a plurality of rotation speeds set in advance by the rotation speed selection means. This rotation speed selection means is based on the vibration measurement result of the casing of the information processing apparatus detected by the vibration detection means mounted on the hard disk device. The rotational speed corresponding to the detected vibration is selected by the rotational speed selecting means, the rotational speed control circuit, the rotational reference signal corresponding to the rotational speed selected by the rotational speed selecting means, and the read / write frequency generating circuit, After the read / write frequency corresponding to the rotation speed selected by the rotation speed selection means is selected, the spindle motor of the hard disk device rotates the disc-shaped recording medium at the selected rotation speed and reads the data by the magnetic head. / Write is performed at the selected read / write frequency.

  According to such a configuration example, the host device, the host OS, and the dedicated application program are unnecessary, the vibration outside the hard disk device is detected, and the rotation speed of the disk-shaped recording medium inside the hard disk device is controlled based on the detected vibration. It becomes possible.

  Here, again, the features of the present invention will be specifically described. For example, a vibration sensor that detects vibration by electromagnetic induction of a magnet and a coil is mounted, and the disk-shaped recording medium rotates at a speed of 15000 rotations / minute. In this case, a configuration is adopted in which a current having a current value of 0.1 μA induced by the magnet oscillating and being induced in the coil is induced, and a circuit configuration in which the amplification circuit amplifies 1000 times. The rotation speed selection means for switching the rotation speed from 15000 rotations / minute to 10,000 rotations / minute with the amplified current as a threshold value of 50 μA reads the current and sets the rotation speed to 10,000 rotations / minute, thereby vibrating the hard disk device. The rotational speed can be selected based on the above.

  By adopting the present embodiment as described above, the rotational speed of the disk-shaped recording medium of the hard disk device is changed by the rotational speed selecting means based on the vibration detected by the vibration detecting means mounted on the hard disk device. This makes it possible to read / write data recorded on the disc-shaped recording medium.

  Therefore, in the present embodiment, a host device, a host OS, or a dedicated application program that has been conventionally required is unnecessary, and vibrations outside the hard disk device can be detected and the rotational speed of the disk-shaped recording medium can be controlled based on the detected vibration. It is possible to realize a hard disk device that can reduce the propagation of vibration to the mounted information processing device casing and reduce generated vibration, noise, heat generation (motor heat generation accompanying high disk rotation speed), and the like.

  Further, the natural frequency of the hard disk device can be changed by controlling and changing the rotational speed of the disk-shaped recording medium. Further, it is possible to extend the life of the hard disk device by reducing the heat generation by controlling and changing the rotational speed of the disk-shaped recording medium (the life and temperature of the HDD have a causal relationship). An HDD can be mounted even in an information processing device housing that is not sufficiently cooled.

1 is a block diagram showing an overall configuration of an information processing apparatus equipped with a hard disk device according to an embodiment of the present invention. It is a block diagram which shows the internal structure of the hard-disk apparatus which concerns on this embodiment. It is a block diagram of the hard disk drive which installed the vibration sensor in this embodiment. 4 is a flowchart showing the operation of the hard disk device according to the present embodiment.

Explanation of symbols

101 Information processing apparatus (eg, PC server)
102 Onboard hard disk drive (HDD)
DESCRIPTION OF SYMBOLS 103 CD-ROM drive 104 Power supply part 105 Control part 106 Mother board 107 Case 108 HDD support part 109 Replacement HDD
DESCRIPTION OF SYMBOLS 201 Hard disk device 202 Vibration detection means 203 Rotation speed selection means 204 Rotation speed setting 205 Read / write frequency generation circuit 206 Read / write frequency table 207 Rotation speed control circuit 208 Rotation speed reference signal 209 Read / write data processing circuit 210 Magnetic head 211 Spindle / motor rotational speed detection circuit 212 Spindle / motor driver 213 Spindle / motor 214 Disc-shaped recording medium 301 Hard disk device 302 Disc-shaped recording medium 303 Head stack assembly 304 Signal line 305 Base / printed circuit board connection section 306 Vibration sensor 1
307 Vibration sensor 2
308 Vibration sensor 3
309 Printed circuit board

Claims (3)

A disk-shaped recording medium for reading or writing information; a motor capable of rotating the disk-shaped recording medium at a plurality of rotation speeds; and a rotation speed selection section for setting one rotation speed among the plurality of rotation speeds. A hard disk device comprising:
The one rotation speed is set using hardware belonging to the hard disk device,
The hard disk device according to claim 1, wherein vibrations of a housing covering the hard disk device are reduced by the setting. A disk-shaped recording medium for reading or writing information; a motor capable of rotating the disk-shaped recording medium at a plurality of rotation speeds; and a rotation speed selection section for setting one rotation speed among the plurality of rotation speeds. A hard disk device comprising:
A vibration sensor is mounted on the hard disk device itself,
The rotation speed selection unit sets the one rotation speed according to an output from the vibration sensor,
The hard disk device according to claim 1, wherein vibrations of a housing covering the hard disk device are reduced by the setting. A disk-shaped recording medium for reading or writing information; a motor capable of rotating the disk-shaped recording medium at a plurality of rotation speeds; and a rotation speed selection section for setting one rotation speed among the plurality of rotation speeds. A hard disk device comprising:
The rotational speed selection unit has setting means such as a jumper pin and a fuse that can set one rotational speed among the plurality of rotational speeds,
Setting the one rotation speed by the setting means;
The hard disk device according to claim 1, wherein vibrations of a housing covering the hard disk device are reduced by the setting.

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