WO2007097182A1 - Commande a disques et son procede de commande de fonctionnement - Google Patents

Commande a disques et son procede de commande de fonctionnement Download PDF

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Publication number
WO2007097182A1
WO2007097182A1 PCT/JP2007/051979 JP2007051979W WO2007097182A1 WO 2007097182 A1 WO2007097182 A1 WO 2007097182A1 JP 2007051979 W JP2007051979 W JP 2007051979W WO 2007097182 A1 WO2007097182 A1 WO 2007097182A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle motor
rotation
stop
host computer
disk drive
Prior art date
Application number
PCT/JP2007/051979
Other languages
English (en)
Japanese (ja)
Inventor
Shinji Kimura
Makoto Yamahara
Tsuyoshi Yokokawa
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2007097182A1 publication Critical patent/WO2007097182A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/22—Brakes other than speed-regulating brakes

Definitions

  • the present invention relates to a technique for stopping rotation of a spindle motor of a disk drive device.
  • the spindle motor is configured to execute a complete stop of the rotation of the spindle motor.
  • the spindle motor has stopped rotating once, so the target rotation from the rotational speed of 0 [rpm]
  • the current situation is that the next operation cannot be carried out unless the power is reached and the power is reached.
  • a window is set by the operation system of the host computer.
  • the host computer is shut down when the requested access cannot be started even if it exceeds approximately 7 seconds for Windows® and approximately 10 seconds for Mac®. There is a possibility of generating.
  • An object of the present invention is to provide a disk drive device that can eliminate unnecessary waiting time in order to solve the above-described conventional problems.
  • the disk drive device of the present invention rotates and drives a disk with a spindle motor, exchanges signals with a host computer, accesses the disk, and transfers data transferred by the host computer.
  • the disk drive device transfers the recorded or reproduced data to the host computer, and determines whether the rotation of the spindle motor needs to be stopped by referring to the operating program according to the operating state. If it is determined that the spindle motor is stopped, the spindle motor is braked and stopped. If it is determined that there is no need to stop the rotation, the spindle motor is free-runned without braking, or the rotation is stopped. Apply less braking to the spindle motor than if it is determined that there is a need for It is characterized by comprising.
  • the operation control method for a disk drive device drives a disk by a spindle motor, and also exchanges signals with a host computer to access the disk and transfer the host computer power.
  • the necessity of stopping the rotation of the spindle motor is determined according to the operating state, and the rotation must be stopped. If it is determined that there is a necessity, the spindle motor is braked and stopped, and if it is determined that there is no need to stop the rotation, the spindle motor is free-runned without braking. Or, apply less braking to the spindle motor than braking when it is determined that there is a need to stop rotation.
  • the host computer power is re-accessed until the elapsed time after the end of the access from the host computer reaches a specified time. It is characterized in that it is determined that there is no need to stop rotation by detecting that there is no state.
  • an error occurs during execution of the operation for the access request of the host computer force, and an error recovery request by restart is issued. In this state, it is detected that the rotation of the spindle motor is stopped before the restart is executed, and it is determined that there is no necessity to stop the rotation.
  • an error occurs during the execution of the operation in response to the access request of the host computer force, and the error is recovered even in the recovery operation. It is characterized in that it is determined that there is no need to stop rotation by detecting that it is in a forceful state that cannot be performed.
  • the restart operation is performed in response to an access request from the host computer while the disk drive device is stopped without removing the disk. It is determined that there is no need to stop the rotation by detecting that an error has occurred during the execution of the spindle and that the spindle motor has been stopped and stopped before restarting. It is characterized by.
  • the spindle motor is detected to be stopped by a request from the host computer to take out the disk, and the rotation is performed. It is characterized in that it is determined that there is a need to stop.
  • step of determining the necessity of stopping the rotation of the spindle motor according to the operation state it is detected that the start request state from the host computer is the first time after inserting the disk, and the necessity of stopping the rotation is detected. It is determined that it is present.
  • the drive stop request of the host computer force is detected, and it is determined that the operation mode state is for development 'verification. Detecting and determining that there is a need to stop rotation And
  • control time for stopping the spindle motor can be shortened according to the type of stop request to the disk drive device, and the stop time of the disk drive device can be shortened.
  • the power consumption can be reduced when it is determined that there is no need to completely stop the step of determining the necessity of completely stopping the rotation of the spindle motor of the present invention.
  • FIG. 1 is a configuration diagram of a disk drive device in Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart of the main part of the drive state control means of the embodiment.
  • FIG. 3 Operation flowchart of (Embodiment 1) when it is determined in the same embodiment that it is necessary to completely stop the rotation.
  • FIG. 5 is an operation flowchart of (Embodiment 3) when it is determined that the rotation needs to be completely stopped in Embodiment 2 of the present invention.
  • FIG. 6 Flow chart of operation of (Embodiment 4) when it is determined in the same embodiment that it is necessary to completely stop the rotation.
  • FIG. 7 Operation flowchart of (Embodiment 5) when it is determined that the rotation needs to be completely stopped in the same embodiment.
  • FIG. 8 Flow chart of operation of (Embodiment 6) when it is determined in the same embodiment that it is necessary to completely stop the rotation.
  • FIG. 9 Operation flowchart of (Embodiment 7) when it is determined in the same embodiment that it is necessary to completely stop the rotation.
  • FIG. 10 Operation flow chart of (Embodiment 8) when it is determined that it is not necessary to completely stop the rotation in Embodiment 3 of the present invention.
  • FIG. 11 Flow chart of the operation of (Embodiment 9) when it is determined in the same embodiment that it is not necessary to completely stop the rotation.
  • FIG. 12 Operation flowchart of (Embodiment 10) when it is determined in the same embodiment that it is not necessary to completely stop the rotation.
  • FIG. 13 is an operational flowchart of (Embodiment 11) when it is determined that there is no need to completely stop the rotation in the same embodiment.
  • the disk drive device 1 is a personal computer host computer as shown in FIG. Used by connecting to 2.
  • the drive state control means 3 of the disk drive device 1 is configured with a microcomputer as a main part, and exchanges signals with the host computer 2 to access the disk 4 and from the host computer 2. Data to be transferred is recorded on the disk 4 or playback data is transferred to the host computer 2.
  • the drive state control means 3 is configured to control the operation of the spindle motor 5 that rotationally drives the set disk via the motor control means 6.
  • FIG. 2 shows a flowchart relating to the control of the spindle motor 5 of the drive state control means 3.
  • step S1 the drive state control means 3 inquires of the operation program whether the spindle motor 5 needs to be stopped according to the operation state. judge.
  • step S1 If it is determined in step S1 that "there is a necessity for stopping", the routine of steps S2 to S6 is executed.
  • step S 2 a “brake stop request” is output to the motor control means 6.
  • step S3 stop control of the spindle motor 5 is started.
  • step S4 the spindle motor 5 is braked for reverse rotation brake.
  • step S5 the spindle motor 5 is completely stopped.
  • step S6 the spindle motor is stopped. 5 stops and completes the control of the spindle motor 5 in response to the “drive stop” request from the host computer 2.
  • step S1 If it is determined in step S1 that "no need to stop", the routine from step S7 to step S10 is executed.
  • step S 7 a “free run stop request” is output to the motor control means 6.
  • step S8 stop control of the spindle motor 5 is started.
  • step S9 the rotation control for rotating the spindle motor 5 at the target rotational speed is switched to the free-run state.
  • step S10 the spindle motor 5 is stopped. Then, the control of the spindle motor 5 in response to the “drive stop” request from the host computer 2 is completed.
  • the spindle motor 5 in response to a "drive stop" request from the host computer 2, the spindle motor 5 is not completely stopped at any time by applying the reverse rotation brake of step S4. If the state is judged at step S1 and rotation stop is not required, it is switched to the free-run state at step S9, and the spindle motor 5 is rotated by inertia to stop naturally over time. Can be shortened compared to the conventional method.
  • the time for waiting for the stop of the rotation of the spindle motor 5 is the stop of the disk drive device 1. This is an unnecessary time for the operation, and the spindle motor 5 completely stops rotating.
  • the spindle motor 5 has been stopped once, as in the past, even though it is in an operation state that does not need to be stopped. Therefore, it is necessary to reach the target rotational speed from the rotational speed of 0 [rpm], and there is an unnecessary time compared to reaching the target rotational speed from the state of rotating due to inertia after the rotational stop. I was in trouble.
  • the time for the stop control of the spindle motor 5 can be shortened from the time until the rotation of the spindle motor 5 completely stops to the time for turning off the rotation control of the spindle motor 5. Monkey.
  • the power consumption for the stop control of the spindle motor 5 can be controlled until the rotation of the spindle motor 5 is completely stopped.
  • the power consumption can be reduced to only the power consumption for turning off the rotation control of the spindle motor 5.
  • FIG. 3 shows another embodiment in place of the routine of step S2 to step S6 shown in FIG.
  • step S 11 a spindle motor stop request by brake stop is issued to the motor control means 6.
  • Step S12 stop control of the spindle motor 5 is started.
  • Step S13 the spindle motor 5 is braked for reverse rotation brake.
  • Step S14 the spindle motor 5 is completely stopped.
  • the host computer 2 is informed that the spindle motor 5 has stopped, and the control of the spindle motor 5 in response to the “drive stop” request from the host computer 2 is completed.
  • FIG. 4 shows another embodiment in place of the routine of step S7 to step S10 shown in FIG.
  • step S21 a spindle motor stop request is issued to the motor control means 6 by a free-run stop.
  • step S22 the rotation stop control of the spindle motor 5 is started.
  • step S23 the motor control means 6 stops the rotation control for driving the spindle motor 5 to reach the target rotation speed. Express that motor 5 has stopped.
  • step S25 stop control of the spindle motor 5 is finished.
  • step S26 the spindle motor 5 rotates due to inertia and stops naturally, and the spindle motor 5 stops completely.
  • FIGS. 5 to 9 show other examples instead of FIG. 3 of the first embodiment.
  • FIG. 5 is a flowchart of the stop of the disk drive device 1 and the removal of the disk when the host computer 2 issues a request to the disk drive device 1 to remove the disk.
  • the stop request force for the disk drive device 1 includes a request for taking out the disk or tray.
  • the operation program of the drive state control means 3 is inquired to determine that it is necessary to stop the rotation of the spindle motor 5. Steps S11 to S15 are executed.
  • step S01 a drive stop request before removing the disk is output, and in step S02, a stop request for the spindle motor 5 is output.
  • step S1 it is determined that it is necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive device 1, and the routine of the spindle motor 5 is performed by the routine of steps S11 to S15. Stop the rotation of the spindle motor 5 with a brake by rotating the spindle motor 5 in the reverse direction.
  • step S16A after the disk drive unit 1 is stopped, the disk can be safely ejected.
  • FIG. 6 is a flowchart in the case where the host computer 2 inserts a disk into the disk drive device 1 and the activation request is issued for the first time to execute the activation operation.
  • step S1 Before stopping the spindle motor 5 during the stop operation of the disk drive device 1, a stop request to the disk drive device 1 is started for the first time after the disk drive device 1 is stopped.
  • the rotation state of the spindle motor 5 is checked in step S1 by referring to the operation program of the drive state control means 3 in step S1. Determine the necessity of stopping and execute step SI 1 to step S15.
  • step S03 it is determined whether or not this is the first activation. If it is the first activation, a drive initial activation request is output in step S04, and a drive and stop request before the initial activation is output in step S05. In step S06, a spindle motor 5 stop request is output.
  • step S1 it is determined that it is necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive device 1, and the routine of the spindle motor 5 is performed by the routine of steps S11 to S15. Stop the rotation of the spindle motor 5 with a brake by rotating the spindle motor 5 in the reverse direction.
  • the spindle motor 5 can always be activated with the same state power.
  • Figure 7 shows that the host computer 2 inserts a disk into the disk drive unit 1, and an error occurs while the startup request is issued for the first time and the startup operation is being executed.
  • 6 is a flow chart when error recovery operation by restart is used.
  • a stop request to the disk drive device 1 causes the disk drive device 1 to start up for the first time. If an error occurs during the process and the request is for stopping to restart, this state is inquired to the operation program of the drive status control means 3 in step S1, and the Determine whether it is necessary to stop the rotation of the spindle motor 5, and execute Steps S11 to S15.
  • step S07 a drive initial activation request is output.
  • step S08 drive activation is started.
  • step S09 the force in which an error occurred during the activation is determined. If an error occurs, a restart request for recovery from the error is output in step S010, and in step S011, the drive before restart is started for recovery from the error. Output a stop request.
  • step S012 a spindle motor 5 stop request is output.
  • step S1 it is determined that it is necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive device 1, and the routine of the spindle motor 5 is performed by the routine of steps S11 to S15. Stop the rotation of the spindle motor 5 with a brake by rotating the spindle motor 5 in the reverse direction.
  • step S16C the spindle motor 5 can be started from the same state as that at the first start-up.
  • FIG. 8 is a flowchart when a stop request is issued to the disk drive device 1 when the state of the disk drive device 1 is a development / verification state (debug mode).
  • a stop request to the disk drive device 1 is executed when the disk drive device 1 is in the debug mode. If it is an intentional stop request, this state is inquired to the operation program of the drive state control means 3 in step S1, and the necessity of stopping the rotation of the spindle motor is determined to determine whether the spindle motor is stopped. Perform step 15.
  • step S013 it is determined whether or not the debug mode is set. If it is in debug mode, a spindle motor stop request in debug mode is output in step S014.
  • step S1 it is determined that it is necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive apparatus 1, and the routine of the spindle motor 5 is performed by the routine of steps S11 to S15. Stop the rotation of the spindle motor 5 with a brake by rotating the spindle motor 5 in the reverse direction.
  • the spindle motor 5 can be activated from the same state as the initial activation.
  • Figure 9 shows a case where the disk drive unit 1 installed in a notebook computer, etc. is stopped when the external power supply to the notebook computer is stopped.
  • step S1 Electric power from outside the disk drive device 1 is mounted or connected in a state where the spindle motor 5 of the disk drive device 1 is controlled or turned off due to inertia when the control is turned off.
  • step S1 the operation program of the drive state control means 3 is inquired to determine that it is in this state, and the necessity to stop the rotation of the spindle motor is determined in step S1. Perform step S15.
  • step S015 a drive stop request is output, and in step S016, a stop request for the spindle motor 5 is output.
  • step S1 the current stop operation of the disk drive device 1 is a state in which the power supply to the external power host computer 2 (for example, the power supply from the commercial power supply) has detected a change from energization to stop. Therefore, it is determined that it is necessary to completely stop the rotation of the spindle motor 5, and the spindle motor 5 is stopped by the routine of step S11 to step S15, and the spindle motor 5 is rotated by a reverse rotation brake. Make sure to stop.
  • the power supply to the external power host computer 2 for example, the power supply from the commercial power supply
  • the host computer 2 is operated by a battery that is in a floating charging operation by a commercial power source or the like, and the disk drive device 1 is also operated by receiving the battery power supply. Even after the power supply is stopped, the operation of the disk drive device 1 is guaranteed by the battery, and when the power supply line to the external computer 2 is disconnected due to the bow force, etc.
  • the spindle motor is stopped reliably in anticipation of an accident in which the device on which the disk drive unit 1 is mounted or connected is moving, so that when the disk drive unit 1 itself is subject to vibration or shock However, it is possible to prevent the disc and the inside of the drive from being damaged due to unexpected rotation of the disc.
  • the stop step by stopping the brake reliably stops the rotation of the spindle motor 5 when the drive state control means 3 determines that the rotation of the spindle motor 5 needs to be completely stopped.
  • it is used for the purpose of always enabling the next operation of the disk drive device 1 from the initial state.
  • FIGS. 10 to 13 show other examples instead of FIG. 4 of the first embodiment.
  • Figure 10 shows the case where the disk drive unit 1 is stopped when the access request is not issued to the disk drive unit 1 for more than the setting time unique to the disk drive unit 1 after the access from the disk drive unit 1 is completed. It is a flowchart.
  • step S1 Before the spindle motor 5 is stopped during the stop operation of the disk drive device 1, a stop request to the disk drive device 1 is accessed for a certain time after the disk drive device 1 is started. If it is a stop request in the event of a failure, this state is checked in step S1, the operation program of the drive state control means 3 is checked, the necessity of stopping the rotation of the spindle motor is determined, and step S 21 to Step S26 are executed.
  • step S017 a timer is started to start counting elapsed time.
  • step SO18 it is determined whether the count of the timer exceeds a specified time. If the specified time has been reached, a drive stop request is output in step S019.
  • step S020 a spindle motor 5 stop request is output.
  • step S1 it is determined that it is not necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive apparatus 1, and the spindle motor 5 is rotated by executing steps S21 to S26. Turn off the control to make it rotate by inertia, and stop the rotation naturally.
  • Fig. 11 is a flow chart when an error occurs during access to the disk drive device 1 from the host computer, and the recovery operation by restart is used to recover the error.
  • step S1 the operation program of the drive state control means 3 is inquired to determine the necessity of stopping the rotation of the spindle motor. Execute S26.
  • step S021 the requested operation is started, and in step S022, it is determined whether an error has occurred. If an error has occurred, in step S023, a recovery request from the error due to restart is output, and in step S024, a drive and stop request before restarting is output for recovery from the error. In step S025, a spindle motor stop request is output.
  • step S1 it is determined that it is not necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive apparatus 1, and the spindle motor 5 is rotated by executing steps S21 to S26. Turn off the control to make it rotate by inertia, and stop the rotation naturally. As a result, it is possible to reduce the time required to complete the stop of the disk drive device 1 without requiring the time to complete the rotation of the spindle motor 5 to stop, and in the next step, the disk drive in step S026A. Device 1 can be restarted more quickly.
  • Fig. 12 is a flowchart for stopping the disk drive unit 1 when an error occurs during the access operation to the disk drive unit 1 from the host computer 2 and the error cannot be recovered even in the recovery operation. It is.
  • step S1 the drive program of the drive status control means 3 is inquired to confirm that this is the case, and the spindle motor needs to be stopped.
  • Step S21 to Step S26 are executed by determining the sex.
  • step S027 the requested operation is started, and in step S028, it is determined whether an error has occurred. Determine. If an error has occurred, a recovery request from the error due to restart is output in step S029, and a recovery operation from the error is started in step S030. In step S031, it is determined whether the error recovery operation is successful. If the error recovery operation fails, a drive stop request is output in step S032, and a spindle motor 5 stop request is output in step S033.
  • step S1 it is determined that it is not necessary to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive apparatus 1, and the spindle motor 5 is rotated by executing steps S21 to S26. Turn off the control to make it rotate by inertia, and stop the rotation naturally. As a result, it is possible to shorten the time until the disk drive device 1 is completely stopped without stopping the spindle motor 5 until the rotation is completely stopped.
  • the target access can be executed earlier in step S026A.
  • Fig. 13 shows the state in which the disk drive unit 1 is started again after the disk drive unit 1 is started and the disk drive unit 1 is stopped without taking out the disk. This is a flowchart when an error occurs and the recovery operation from the error by restart is used to recover from the error.
  • step S1 the operation program of drive state control means 3 is inquired to determine the necessity of stopping the rotation of the spindle motor, and steps S21 to S26 are executed.
  • step S031 After the drive is stopped in the disk insertion state in step S031, the disk drive device 1 that has detected the access request from the host computer 2 in step S032 To output a drive start request.
  • step S034 the drive is started.
  • Step S035 determines whether an error has occurred. If an error has been detected, a restart request for error recovery is output in step S036, and a drive and stop request before restart is output for error recovery in step S037.
  • Step S038 a spindle motor stop request is output.
  • step S1 it is determined that there is no need to completely stop the rotation of the spindle motor 5 in the current stop operation of the disk drive device 1, and the spindle motor 5 is rotated by executing steps S21 to S26. Turn off the control to make it rotate by inertia, and stop the rotation naturally. As a result, it is possible to shorten the time until the disk drive device 1 is completely stopped without stopping the spindle motor 5 until the rotation is completely stopped.
  • the recovery operation can be executed earlier in step S026B.
  • the stop step by the free-run stop is the stop time of the disk drive device 1 when the drive state control means determines that there is no need to completely stop the rotation of the spindle motor 5. It is used for the purpose of shortening and shortening the startup time at the next startup.
  • the force when it is determined that there is no need to stop the rotation, the force is configured so that the spindle motor is free-runned without braking. Even when the spindle motor is configured to apply less braking than the braking when it is determined that there is a possibility, the waiting time can be expected to be shortened compared to the conventional case.
  • the necessity of rotation stoppage is determined based on the necessity of rotation stoppage by executing any one of the flows shown in Figs. It is determined that there is no need, and it is determined that there is a need to stop rotation by executing any of the flows in Figs. 5, 6, 6, 7, and 9.
  • Fig. 10, Fig. 11, Fig. 12, and Fig. 13 At least one flow is executed and it is determined that there is no need to stop rotation each time, and at least one flow of Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9 is executed each time.
  • the force that free-runs the spindle motor is compared with the control when it is determined that there is a need for rotation stop.
  • a similar effect can be expected by applying a small amount of braking to the spindle motor. Specifically, if it is configured to brake continuously when it is determined that there is a need for rotation stop, it is intermittent when it is determined that there is no need for rotation stop. For example, a case where braking is applied to the spindle motor by applying brakes or releasing the brakes, which is less than the braking performed when it is determined that there is a need to stop rotation can be given.
  • the present invention relates to CD (Compact Disc), DVD (Digital Versatile Disk), and BD (Blu-ray).
  • y Disc and other data recording / playback devices that record and play back data from computers such as personal computers, devices that read video and audio from discs, such as desktop media players and notebook media players, and desktop recording This contributes to improving the operability of devices that record video and audio on a disc or read video and audio from a disc, such as playback devices and notebook type recording and playback devices.

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  • Rotational Drive Of Disk (AREA)

Abstract

Dans le cadre de la présente invention, avant qu'une opération d'arrêt d'un moteur à axe ne soit réalisée, une demande d'arrêt juge la nécessité d'arrêt complet en rotation d'un moteur à axe dans l'étape S1, et arrête le moteur à axe en freinant dans l'étape S4 lorsqu'un arrêt complet en rotation est nécessaire, et autrement arrête le moteur à axe après la rotation inertielle dans l'étape S9.
PCT/JP2007/051979 2006-02-27 2007-02-06 Commande a disques et son procede de commande de fonctionnement WO2007097182A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-049440 2006-02-27
JP2006049440A JP2007226919A (ja) 2006-02-27 2006-02-27 ディスクドライブ装置およびその運転制御方法

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WO2007097182A1 true WO2007097182A1 (fr) 2007-08-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020117897A (ja) * 2019-01-22 2020-08-06 住友重機械工業株式会社 作業機械

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH1055595A (ja) * 1996-08-13 1998-02-24 Sony Corp 記憶装置
JPH1196649A (ja) * 1997-09-08 1999-04-09 Samsung Electron Co Ltd ディスクドライブ
US5907713A (en) * 1996-02-29 1999-05-25 Kabushiki Kaisha Toshiba Control method for a hard disk drive and a data processor reducing power consumption of the hard disk drive
JP2001103775A (ja) * 1999-10-01 2001-04-13 Matsushita Electric Ind Co Ltd 光ディスク回転停止方法およびその装置
WO2001039187A1 (fr) * 1999-11-25 2001-05-31 Matsushita Electric Industrial Co., Ltd. Dispositif a disque et procede de deceleration/d'arret de disque dans un dispositif a disque
US6512723B2 (en) * 2000-05-11 2003-01-28 Fujitsu Limited Information storage apparatus having selective storage medium rotation stop operation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5907713A (en) * 1996-02-29 1999-05-25 Kabushiki Kaisha Toshiba Control method for a hard disk drive and a data processor reducing power consumption of the hard disk drive
JPH1055595A (ja) * 1996-08-13 1998-02-24 Sony Corp 記憶装置
JPH1196649A (ja) * 1997-09-08 1999-04-09 Samsung Electron Co Ltd ディスクドライブ
JP2001103775A (ja) * 1999-10-01 2001-04-13 Matsushita Electric Ind Co Ltd 光ディスク回転停止方法およびその装置
WO2001039187A1 (fr) * 1999-11-25 2001-05-31 Matsushita Electric Industrial Co., Ltd. Dispositif a disque et procede de deceleration/d'arret de disque dans un dispositif a disque
US6512723B2 (en) * 2000-05-11 2003-01-28 Fujitsu Limited Information storage apparatus having selective storage medium rotation stop operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020117897A (ja) * 2019-01-22 2020-08-06 住友重機械工業株式会社 作業機械

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