JP3771538B2 - Method of changing operation mode in disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device, and in particular, a high-speed transfer / high-speed access mode in which a disk recording medium is rotated at a high speed and a head is moved at high speed to perform seek and recording / reproducing (read / write), and a disk recording medium is rotated at a low speed. The present invention relates to a disk device having a low power consumption and low noise mode for moving at low speed and performing seek and recording / reproducing (reading and writing).
[0002]
[Prior art]
Conventionally, as described in, for example, cited document 1, in a compact disc (CD) or digital audio tape recorder (DAT), a normal sound is read with respect to reading a signal other than a sound signal such as a control signal TOC. A device is known in which a second speed faster than the signal reading speed is automatically set to improve the operability of the reproducing apparatus.
[0003]
FIG. 8 shows a schematic configuration of the disk device described in the cited document 2. In the figure, a magnetic disk device 1 has a magnetic disk 2, a disk drive motor 3, a magnetic head 5, a disk circuit unit 13, and a standby control means 14. By this standby control means 14, the following Perform the action. In other words, the standby control means 14 detects the I / F, when there is no file access request (write / read request) for a certain period of time in addition to the normal operation mode (write / read mode) and the stop mode of all power off. When the power supply of the circuit unit 13 such as the amplifier and the head control circuit is turned off or in a standby state, the disk drive motor 3 has a normal rotation speed, and when the first standby mode further continues for a certain period of time, The power of the circuit unit 13 such as the I / F, the detection amplifier, the head control circuit, etc. is turned off or in a standby state, and a second standby mode in which the disk drive motor 3 rotates at a low speed is set, thereby reducing power consumption. I am trying.
[0004]
Further, for example, as described in cited document 3, in the magnetic disk device, when the next read / write start time is known in advance, the waiting time from the start of seek to the start of read / write is detected. By controlling the head seek speed (moving speed) so that the difference from the average seek time obtained for each head moving distance in advance is almost zero, avoiding acceleration / deceleration of the head more than necessary. The thing which aimed at the power saving at the time of a seek is known.
[0005]
[Cited document 1]
JP-A-2-156470
[0006]
[Cited document 2]
Japanese Patent Laid-Open No. 4-205963
[0007]
[Cited document 3]
Japanese Unexamined Patent Publication No. 63-87663
[0008]
[Problems to be solved by the invention]
In the prior art of the above cited reference 1, in a CD or DAT, an audio signal required by a user is reproduced at only one normal speed, and a signal that is not used by the user, such as a control signal, is transmitted at a normal speed. Also plays at high speed. Any data used by the user can be recorded / reproduced at various medium speeds such as high speed, standard speed, and low speed as required by the user, and power saving can be considered. Not.
[0009]
The prior art of the above cited document 2 turns off the power of the head control circuit in a standby mode (first and second standby modes) in which reading / writing (including seek) is not performed, and in the second standby mode among them. Furthermore, the rotational speed of the disk drive motor is made lower than the normal speed, the read / write speed is only normal speed (one type), and various data read / write speeds are set according to the user's request. Nothing is considered about that.
[0010]
However, first, in general, in a disk device, the frequency of occurrence of a state in which reading / writing is not performed is not necessarily so high. In general, the state in which reading / writing is not performed is a non-operating state (consumption) in which power is not turned on. Since the power consumption is the second lowest (power consumption is 0W) (the most power consumption is when the motor starts, the next most is the file access, both in the case where the motor is rotating and not reading / writing) However, as in Reference 2, even if the standby mode (second standby mode) is set and the disk motor speed is lowered in the state where reading / writing is not performed, the overall power consumption reduction effect is too small. Cannot be obtained. Rather, when the reading / writing state is divided in the second standby mode, it is necessary to start up the disk motor when the standby mode is shifted to the writing / reading operation, so that a large amount of power is temporarily consumed.
[0011]
Secondly, in Cited Document 2, since the motor startup time is required to move from the standby mode to the writing / reading operation, there arises a problem that the start of writing / reading is delayed and the operation speed is delayed.
[0012]
The prior art of the cited document 3 adjusts the seek speed so that the seek ends immediately before the read / write start time known in advance. There is no idea of using a high-speed seek capable of high-speed processing and a low-speed seek performed with low noise and low power according to the user's request. In Reference 3, as in References 1 and 2, arbitrary data is read and written at various read / write speeds such as high speed, standard speed, and low speed in response to a user request. Also not taken into account.
[0013]
By the way, in the magnetic disk device and the optical disk device, the user's requirements for the performance can be roughly classified into two types as follows.
[0014]
(1) High-speed transfer and high-speed access
▲ 2 ▼ Low power consumption and low noise
To satisfy the performance of (1), it is necessary to increase the read / write speed of the disk, that is, the rotation speed and the seek speed of the head, and to satisfy the performance of (2), the read / write speed (rotation speed) of the disk and the head. It is necessary to reduce the seek speed. These two performances are contradictory to each other, and there is no disk device that satisfies the two performances at the same time, and there is only a model having one kind of data read / write speed and seek speed. For this reason, the user must prepare at least one model each satisfying the above two performances and use it under the usage conditions (noise level or maximum power regulation or transfer / It is necessary to select a magnetic disk device having a performance suitable for whether the access speed is important.
[0015]
In that case, the following problems occur.
[0016]
{Circle around (1)} Even when the intended use conditions are not clear, a magnetic disk device having either performance must be selected.
[0017]
(2) There is no other method than re-purchasing or replacing the magnetic disk device when it is desired to switch to the other performance in the middle of use due to changes in usage conditions.
(3) The performance cannot be switched in a timely manner depending on the method of use.
[0018]
In particular, such a problem occurs in a disk device attached to a personal computer that shares a commercial AC power source and a built-in battery power source, such as a notebook personal computer. This type of personal computer uses enough power when using a commercial power supply, so it is desirable to increase the head seek speed and disk read / write speed sufficiently when accessing files. In order to increase the continuous use time of the disk, it is desirable to reduce the head seek speed and the disk read / write speed and use it with low power consumption.
[0019]
Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, and to seek and perform at high speed.
Quick mode for reading and writing data (high-speed transfer / high-speed access mode)
Silent mode for seeking and reading / writing data at low speed, low power consumption and low noise
Users in at least two modes (low speed, low power consumption, low noise mode)
It is an object of the present invention to provide a method of changing an operation mode in a disk device that can be arbitrarily selected in accordance with the above requirement.
[0020]
Another object of the present invention is to attach a personal computer that shares a commercial power source and a built-in battery power source.
The above quick mode is selected when commercial power is used in
If the built-in battery power is used, the silent mode is selected.
An object of the present invention is to provide a method for changing an operation mode in a disk device having a switching function.
[0021]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0022]
(1) In a disk apparatus that rotates a disk-shaped recording medium and moves a head toward a target position of the recording medium to record data on the recording medium or reproduce data from the recording medium, the head seek movement speed is increased. A head moving speed mode switching means for switching between two or more stages and a medium rotation speed mode switching means for switching the rotation speed during recording or reproduction of the recording medium to two or more stages are provided.
[0023]
(2) In the above (1), switching of the seek movement speed of the head and the rotation speed of the recording medium are performed in accordance with commands from the host device.
[0024]
(3) In the above (1) or (2), the apparatus has a commercial power source and a built-in battery power source, and the head moving speed mode switching means and the medium rotation speed mode switching means Both the seek movement speed and the rotation speed of the recording medium are switched to the high speed mode, and when the battery power supply is used, both the seek movement speed of the head and the rotation speed of the recording medium are switched to the low speed mode.
[0025]
The operation based on the above configuration will be described.
[0026]
According to the configuration (1), the head seek moving speed and the recording medium (disk) rotation speed can be switched in two or more stages, so that the user can write signals with one disk device. If you want to perform reading at high speed, you can write and read with Quick mode selected (the maximum speed for both the head and disk). If you want to reduce noise and reduce power consumption, Writing and reading may be performed in a state where both are set to the minimum speed. Since the operation mode can be selected in this way, (1) even if the use condition is not determined in advance, the use condition can be determined later and the operation mode suitable for it can be selected, and (2) the use condition is changed. However, it is not necessary to purchase a new disk device, and (3) the user can change the operation mode even during use according to the use conditions.
[0027]
As the speed mode switching mechanism, in order to allow the user to freely select each mode at any time, the mode is switched by an instruction from the host device to the microprocessor in the disk device as in the configuration (2). In this way, the user can easily select the required mode by key operation or the like. Alternatively, each mode can be switched by a hardware switch such as a Japan connector provided on the head drive circuit and the disk motor drive circuit of the disk device.
[0028]
According to the configuration of (3) above, when a commercial power supply is used as a power source for a personal computer and a disk device, high-speed read / write and high-speed seek quick modes are selected, and high-speed and high-performance data transfer / access is possible. When a battery power source is used, low-speed read / write and low-speed seek silent mode is selected, and data transfer and access that can operate continuously for a long time with low noise and low power consumption can be performed.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0030]
FIG. 1 is a configuration diagram of a magnetic disk device according to a first embodiment of the present invention.
[0031]
In FIG. 1, a disk device 1 includes a magnetic disk 2 as a recording medium, a motor 3 that rotatably supports the disk 2, a head 5 that writes and reads signals on the disk 2, a head drive mechanism 6, and a motor 3. And a head driving circuit 7 connected to a head driving mechanism 6. Both drive circuits 4 and 7 are connected to a microprocessor 8.
[0032]
At least one switch 9-12 is connected to the microprocessor 8, and in the case of FIG. 1, four switches are connected. By combining these switches, various operation modes can be set as will be described later.
[0033]
Two operation modes are set in the microprocessor 8, one is a quick mode in which the motor rotation speed is 7200 rpm and the head seek movement time is 8 ms, and the other is a motor rotation speed of 5400 rpm (startup). The current value at the time is the same as the quick mode), and the silent movement mode is such that the head seek movement time is 10 ms (acceleration / deceleration is the same as the quick mode). The quick mode is a mode capable of realizing high-speed transfer and high-speed access to the disk device, while the silent mode is a mode capable of realizing low power consumption and low noise.
[0034]
These two modes can be selected by setting the switches 9 to 12 connected to the microprocessor 8. For example, when the switch 9 is set to the off state, the operation mode is set to the quick mode, and when the switch 9 is set to the on state, the operation is performed in the silent mode. In FIG. 1, four switches 9 to 12 are connected. ^Four The operation mode can be set up to the street. In the case of FIG. 1, since the operation mode is set by switches 9 to 12 provided on a disk device such as a jumper switch, it cannot be set by a command from a host device (system).
[0035]
FIG. 2 is a schematic configuration diagram of a disk device according to a second embodiment of the present invention, and this embodiment is a case where a drive circuit that switches operation modes in response to a command from a host device (system) is provided.
[0036]
In FIG. 2, the disk device 1 includes a disk 2 as a recording medium, a motor 3 that rotates and supports the disk 2, a head 5 that writes and reads signals on the disk 2, a head drive mechanism 6, and a motor 3. A motor drive circuit 4 for driving and a head drive circuit 7 connected to the head drive mechanism 6 are provided, and both the drive circuits 4 and 7 are connected to a microprocessor 8.
[0037]
In the microprocessor 8, two operation modes, a quick mode and a silent mode, are set, and a switch circuit 15 for switching between these two operation modes in response to a command from a host device (system) is incorporated. The switch circuit 15 in the microprocessor 8 is equivalent to the switch circuits 9 to 12 shown in FIG. 1, and various operation modes are determined depending on the setting state.
[0038]
FIG. 3 is a schematic configuration diagram of the disk device according to the third embodiment of the present invention. In this embodiment, the current limiting circuit 16 is built in the microprocessor 8.
In FIG. 3, the disk device 1 includes a disk 2 as a recording medium, a motor 3 that rotatably supports the disk 2, a head 5 that writes and reads signals on the disk 2, a head drive mechanism 6, and a motor 3. A motor drive circuit 4 for driving and a head drive circuit 7 connected to the head drive mechanism 6 are provided, and both the drive circuits 4 and 7 are connected to a microprocessor 8.
[0039]
In the microprocessor 8, two operation modes, a quick mode and a silent mode, are set. Further, a switch circuit 15 for switching between these two operation modes in response to a command from a host device (system), both drive circuits 4, And a current limiting circuit 16 for individually determining the maximum current value flowing through the circuit 7.
[0040]
The maximum current value determined by the current limiting circuit 16 is linked to the operation mode selected by the setting of the switch circuit 15, for example, the maximum current value is not limited when the quick mode is selected, When the motor drive circuit 4 is 2A and the head drive circuit 7 is 0.9A (values determined by voltage and resistance values, respectively) and the silent mode is selected, the maximum current value is determined by the motor drive circuit 4 1.5A and the head driving circuit 7 are determined to be 0.6A.
[0041]
FIG. 4 is a schematic configuration diagram of a disk device according to a fourth embodiment of the present invention. In this embodiment, the current limiting circuits 17 and 18 are built in the drive circuits 4 and 7.
[0042]
In FIG. 4, the disk device 1 includes a disk 2 as a recording medium, a motor 3 that rotatably supports the disk 2, a head 5 that writes and reads signals on the disk 2, a head drive mechanism 6, and a motor 3. A motor drive circuit 4 for driving and a head drive circuit 7 connected to the head drive mechanism 6 are provided, and both the drive circuits 4 and 7 are connected to a microprocessor 8.
[0043]
The microprocessor 8 has two operation modes, a quick mode and a silent mode, and a switch circuit 15 for switching between the two operation modes in response to a command from a host device (system).
[0044]
The maximum current value determined by the current limiting circuits 17 and 18 is linked to the operation mode selected by the setting of the switch circuit 15. For example, when the quick mode is selected, the maximum current value is not limited. The motor 3 and the head drive mechanism 6 are operated by the drive circuits 4 and 7, and the maximum current values flowing through the drive circuits 4 and 7 are 2A for the motor drive circuit 4 and 0.9A for the head drive circuit 7 (each with voltage). If the silent mode is selected, the maximum current value is 1.5 A for the motor drive circuit 4 and 0.6 A for the head drive circuit 7 in the motor 3. The head driving mechanism 6 is determined to operate. Therefore, the motor drive circuit and the head drive circuit are apparently set in two ways, but the operation content is equivalent to the drive circuit of FIG.
[0045]
FIG. 5 shows a change in rotational speed (upper drawing (a)) and a change in current value (upper drawing (b)) at the time of starting the disk motor (until the steady rotational speed is reached) in the above embodiment.
A solid line indicates changes in the motor rotation speed v and the current value I over time in the quick mode, and corresponds to the quick mode of FIGS. The alternate long and short dash line indicates changes in the motor rotation speed and the current value over time in the silent mode without current limitation, and corresponds to the silent mode in FIGS. A broken line indicates a change in the motor rotation speed and the current value over time in the silent mode with current limitation, and corresponds to the silent mode in FIGS. Although FIG. 5 shows the operation at the time of starting the motor, the reverse operation is performed when the motor is stopped.
[0046]
FIG. 6 shows a change in moving speed (the same figure (a)) and a change in current value (the same figure (b)) when moving the head in the above embodiment.
[0047]
A solid line indicates changes in the head moving speed v and the current value I over time in the quick mode, and corresponds to the quick mode of FIGS. The alternate long and short dash line shows the same acceleration / deceleration as the quick mode, ₁ The change in the head moving speed and the current value with the lapse of time in the silent mode limited to 2 is shown, and corresponds to the silent mode of FIGS. The broken line shows the current value during acceleration / deceleration without limiting the maximum speed. ₁ , -I ₁ FIG. 3 shows changes in the moving speed and current value over time in the silent mode restricted to FIG. 3, corresponding to the silent mode of FIGS.
[0048]
In addition, a silent mode in which both the maximum speed and the current value during acceleration / deceleration are limited can be considered.
[0049]
In the above embodiment, the operation mode is two modes, the quick mode and the silent mode. However, the normal (standard) mode, the quick mode that can be accessed at a higher speed, and the silent mode that is slower than the normal mode and lower in power consumption. It can also be configured to switch and select three or more operation modes.
[0050]
In the above embodiment, once the system is started in a certain mode, the disk motor speed is constant unless the mode is changed halfway. Therefore, the operation for increasing the motor rotation speed for each access is not required. There will be no delay in read / write operations.
[0051]
FIG. 7 is a flowchart for explaining the operational relationship between the disk device and the host device according to the present invention.
[0052]
First, the power supply of the host device provided with the disk device is turned on (701), and accompanying this, the power of the disk device is turned on (702).
[0053]
Immediately after the power is turned on, the operation mode is set according to the information stored in the ROM, and a stable state is reached (703). Immediately thereafter, the operation mode information at the previous end stored on the disk surface is stored. The information is loaded and stored in the RAM (704). Then, the stable operation state is reached in the operation mode based on the information stored in the RAM (705). At this time, a normal mode in which an intermediate performance between the quick mode and the silent mode can be set in the ROM in advance.
[0054]
When changing the operation mode of the disk device (706), a list of operation modes stored in the ROM of the disk device is first loaded from the upper device by the operation of the user of the upper device (707). . The list of the loaded operation modes is displayed on the display of the host device with the operation mode set last time being highlighted, and the user selects one operation mode (708). Accordingly, the information on the operation mode stored in the RAM is rewritten to the information on the operation mode selected by the user, thereby confirming the operation mode (709). When the operation mode is changed by the user as described above, it waits for the stable operation state to be entered again.
[0055]
Thereafter, file access from the host device to the disk device is started in the set operation mode, and required data transfer is performed.
[0056]
Also, when the end processing of the host device is started (710), the information on the final operation mode stored in the RAM of the disk device is recorded in a specific location on the disk surface (711), and the next host device is next time. Becomes the “previous operation mode” used when the machine is restarted.
[0057]
When all the above processes are completed, the power of the host device and the disk device is turned off (712).
[0058]
Next, as a fifth embodiment, an embodiment in which the disk device of the present invention is applied to a computer sharing a commercial AC power source and a built-in battery power source, for example, a notebook personal computer (personal computer) will be described.
[0059]
Generally, the notebook type personal computer 20 uses a built-in battery when it is used for portable purposes, and a commercial 100 VAC when used in an office or the like. When a built-in battery is used for portable use, it can be said that the power consumption of the system directly affects the continuous use time, and it is better that the continuous use time is long. On the other hand, when 100 VAC is used as a power source, there is no need to pay special attention to power consumption unless a power failure occurs. Therefore, a disk device capable of writing / reading information at high speed when accessing a file is preferred. It can be said that the performance is good. Therefore, it can be said that a notebook type personal computer consumes less power when used for portable purposes, but a disk device capable of accessing a file at high speed as needed is convenient.
[0060]
However, the conventional disk device has only one of the performances, or has the intermediate performance that cannot be said to be either. This is because it is technically difficult to simultaneously achieve low power consumption and high-speed file access.
[0061]
Therefore, in this embodiment, the disk device 1 having a plurality of operation modes of each of the above embodiments is applied to a notebook type personal computer (personal computer), and a commercial AC power source is used as a power source for the personal computer and the attached disk device. When using the built-in battery power supply, the quick access quick mode is automatically selected, and the low power consumption silent mode is automatically selected. Since these operation modes are switched at any time by a command from the host device (notebook type personal computer), it is possible to always provide good performance for the host device.
[0062]
As a specific mode switching command method from the above-mentioned device (personal computer), by devising the following, it is not necessary for the user to input commands by tapping the keyboard.
[0063]
That is, first, a means for measuring an external power supply voltage (not shown) is provided in the power reception unit of the host device as a mechanism for detecting whether or not the supply from the external power supply is received. Usually, a notebook type personal computer is provided with a diode or the like for preventing a reverse flow from the battery to the commercial power source, and automatically switches to the internal battery when the external commercial power source is cut off. Therefore, when the sensing mechanism senses that no power is received from the external power source, that is, the host device is being used by the built-in battery, an operation mode (silent operation) aimed at low power consumption for the disk device. Command to operate in (mode). Also, when the sensing mechanism senses that the host device is receiving power from an external power supply, it instructs the disk device to operate in an operation mode (quick mode) aimed at accessing files at high speed. To do. Instructing the disk device from the host device is equivalent to sensing the state of the host device from a different perspective. As described above, the relationship between the usage mode of the notebook type personal computer and the operation mode of the disk device is such that when the portable device is used for portable use, the operation mode with low power consumption is automatically set and used in the office. Is related to automatically setting an operation mode for performing high-speed file access.
[0064]
As the magnetic disk device used in the present invention, one having a magnetic head having a negative pressure slider structure can be used. This magnetic head is in contact with the disk surface when the magnetic disk is stationary, but when the disk rotational speed exceeds a predetermined value, the magnetic head is independent of the rotational speed (in any of the above operation modes). ) Maintain a certain flying height.
[0065]
Although the magnetic disk device has been described in the above embodiment, the present invention can be similarly applied to an optical disk device and a magneto-optical disk device.
[0066]
【The invention's effect】
As described above in detail, according to the present invention, the head seek speed and the disk recording medium rotational speed can be switched in two or more stages with one disk device, so that low noise and low power consumption are achieved. If you want to access and transfer data, you can select a low-speed silent mode, and if you want high-speed file access and data transfer, select a quick mode. The effect is obtained. Further, since the conventional standby mode (a standby mode in which the rotational speed of the disk motor is lower than the rotational speed at the time of reading and writing during each access read / write) is not adopted, the motor rotational speed is increased at the time of successive data access ( (Start up) operation is unnecessary, and there is an effect that the read / write operation delay associated with the start up does not occur.
[0067]
Further, if these operation modes are selected and switched from the host device, the user can easily select the required mode.
[0068]
In addition, when applied to a PC that shares a commercial power source and a built-in battery power source, such as a notebook computer, high-speed read / write and high-speed seek quick modes are selected when using the commercial power source. When transfer / access is possible and when battery power is used, low-speed read / write and low-speed seek silent mode is selected, so low-noise, low power consumption and continuous operation for a long time can be used. An effect is obtained.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a disk device including a drive circuit according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a disk device including a drive circuit that performs mode switching in response to a command from a host device according to an embodiment of the present invention.
FIG. 3 is a configuration diagram of a disk device including a drive circuit having a current limiting circuit in the microprocessor according to the embodiment of the present invention.
FIG. 4 is a configuration diagram of a disk device including a drive circuit having a current limiting circuit in each drive circuit according to the embodiment of the present invention.
FIG. 5 is a diagram showing a change in rotational speed and a change in current value when the motor is started.
FIG. 6 is a diagram showing a change in head moving speed and a change in current value.
FIG. 7 is a flowchart illustrating the related operation of the disk device and the host device according to the embodiment of this invention.
FIG. 8 is a configuration diagram of a disk device including a conventional drive circuit.
FIG. 9 is a schematic perspective view of a notebook personal computer to which the disk device of the present invention is applied.
[Explanation of symbols]
1 Disk unit
2 Disc (medium)
3 Motor
4 Motor drive circuit
5 heads
6 Head drive mechanism
7 Head drive circuit
8 Microprocessor
9-12 switch
13 Disc circuit section
14 Standby control means
15 Switch circuit
16-18 Current limit circuit
20 Notebook personal computer

Claims (3)

A motor for rotating a disk-shaped recording medium for recording information; a motor driving circuit for driving the motor; a head movable to a predetermined position of the recording medium; a head driving circuit for driving the head; a microprocessor for controlling the motor driving circuit and the head driving circuit, the Bei example,
Either a quick mode in which the seek movement speed of the head is high and high-speed access can be realized, or a silent mode in which the seek movement speed of the head is low and low noise can be realized by a command from a host device. You can choose
The power is turned on accompanying the power-on of the host device, and the operation mode is the operation mode at the previous end stored on the recording medium surface in the operation mode of the quick mode and the silent mode,
When click Ikkumodo is selected, when the maximum speed of the moving speed of the head is given a driving current to the head drive circuit such that the large, silent mode is selected, the maximum moving speed of the head A method of changing an operation mode in a disk device that applies a drive current to the head drive circuit so that a speed is smaller than a maximum speed of the quick mode ,
First, a first step in which the power of the disk device is turned on accompanying the power-on of the host device;
Next, the previous operation mode stored on the surface of the recording medium is stored in the RAM of the disk device, and a stable operation state is reached in the quick mode or the silent mode based on the information stored in the RAM. A second step;
Subsequently, when changing the operation mode of the disk device, the operation mode stored in the ROM of the disk device is loaded by an operation from the host device, and the quick mode or the silent mode is displayed on the display of the host device. A third step of displaying the mode;
Furthermore, a fourth step of selecting an operation mode that is not a mode that has reached a stable operation state in the second step among the operation modes displayed in the third step by an operation from the host device; A method for changing an operation mode in a disk device, comprising : A motor for rotating a disk-shaped recording medium for recording information; a motor driving circuit for driving the motor; a head movable to a predetermined position of the recording medium; a head driving circuit for driving the head; A motor drive circuit and a microprocessor for controlling the head drive circuit,
Either a quick mode in which the seek movement speed of the head is high and high-speed access can be realized, or a silent mode in which the seek movement speed of the head is low and low noise can be realized by a command from a host device. You can choose
The power is turned on accompanying the power-on of the host device, and the operation mode is the operation mode at the previous end stored on the recording medium surface in the operation mode of the quick mode and the silent mode,
When the quick mode is selected, a drive current is applied to the head drive circuit so that the maximum speed of the head movement speed is large. When the silent mode is selected, the maximum speed of the head movement speed is given. Gives a drive current to the head drive circuit so that is smaller than the maximum speed of the quick mode,
A method of changing an operation mode in a disk device that switches a rotation speed of a rotation motor of the recording medium corresponding to each of the quick mode and the silent mode ,
First, a first step in which the power of the disk device is turned on accompanying the power-on of the host device;
Next, the previous operation mode stored on the surface of the recording medium is stored in the RAM of the disk device, and a stable operation state is reached in the quick mode or the silent mode based on the information stored in the RAM. A second step;
Subsequently, when changing the operation mode of the disk device, the operation mode stored in the ROM of the disk device is loaded by an operation from the host device, and the quick mode or the silent mode is displayed on the display of the host device. A third step of displaying the mode;
Furthermore, a fourth step of selecting an operation mode that is not a mode that has reached a stable operation state in the second step among the operation modes displayed in the third step by an operation from the host device; A method for changing an operation mode in a disk device . The method for changing an operation mode in the disk device according to claim 1 or 2,
In addition to the quick mode and the silent mode, a normal mode is provided. In the normal mode, the seek movement speed is lower than the quick mode and the access is low speed, and the seek movement speed is higher than the silent mode. Oh Ri in that mode is,
In the second step, a stable operation state is reached in the quick mode, the silent mode or the normal mode,
In the third step, the quick mode, the silent mode, or the normal mode is displayed .

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