JP2008117480A - Image forming device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device preventing data access performance to a hard disk drive from being deteriorated even when an impact is predicted. <P>SOLUTION: While transferring data of an HDD 106, a reception section 206 of a control program 200 running on the image forming device discriminates whether the state change of a component is detected or not by a detection means such as a position sensor. Furthermore, a detecting section 208 refers a correspondence stored in a storage section 204 and discriminates whether a control mode set on the detected components is a first mode or not. When the control mode is the first mode, a head of the HDD 106 is retracted and a driving of disk is stopped, then the HDD 106 enters a sleep state. When the control mode is a second mode, the head of the HDD 106 is retracted. In this case, the disk is kept driven as it is. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image forming apparatus such as a printer, a facsimile machine, and a copying machine.

  This type of image forming apparatus includes a hard disk drive (HDD). In general, if an error occurs while a series of data is being written to the recording medium of the HDD, writing to the corresponding position is canceled and writing is performed to another position. In this case, the continuity of the data recording location is lost. When such data is read, the reading speed decreases due to variations in data recording sites, and the system performance deteriorates. Also, if an excessive impact is applied when reading data, the data recording position may not be controlled. In this case, retries are repeated, the reading speed decreases, and the system performance deteriorates.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses a method in which the HDD is not driven when it is detected that the paper feed cassette is open. In this method, when it is detected that the remaining amount of paper in the paper feed cassette is equal to or less than a predetermined amount, the drive of the HDD is not performed.

JP 2002-052786 A

  The present invention has been made from the above-described background, and an object thereof is to provide an image forming apparatus capable of preventing deterioration in data access performance to a hard disk drive even when an impact is predicted.

  In order to achieve the above object, an image forming apparatus according to the present invention includes a hard disk drive, a detection unit that detects a state of at least one component device other than the hard disk drive, and a component device detected by the detection unit. Hard disk drive control means for controlling the hard disk drive based on a state change. According to the present invention, it is possible to prevent deterioration of data access performance to a hard disk drive even when an impact on the hard disk drive is predicted, such as opening / closing of a cover and insertion / extraction of a component.

  Preferably, the hard disk drive has a head and a disk, and the hard disk drive control means controls the drive of the disk when the first state change is detected by the detection means, and the detection means When the second state change is detected, the position of the head is controlled. According to the present invention, since the anti-impact mode with different return times is configured, more effective performance setting is possible.

Preferably, the hard disk drive control means stops the rotation of the disk when the detection means detects a first state change. According to the present invention, it is possible to prevent the performance from being deteriorated due to an operation with a large impact on the hard disk drive.
Preferably, the hard disk drive control means retracts the head when the detection means detects a second state change. According to the present invention, it is possible to more effectively prevent performance degradation due to an operation with a small impact on a hard disk drive.

  Preferably, the hard disk drive control means makes the hard disk drive accessible when the detection means detects that the component device has returned to a predetermined state. According to the present invention, data can be protected more effectively while an impact may be applied to the hard disk drive.

Preferably, there are a plurality of the component devices, and the device further includes a storage unit that stores the relationship between each component device and the control mode set for each component device.
Preferably, the hard disk drive control means controls the hard disk drive further based on a relationship stored in the storage means.

  Preferably, data transfer control means for controlling interruption and resumption of data transfer to the hard disk drive is further provided. According to the present invention, it is possible to protect data more effectively from the impact applied to the hard disk drive as compared with the case where this configuration is not provided.

  Preferably, the data transfer control means controls data transfer to the hard disk drive based on a state change detected by the detection means.

Preferably, the data transfer control means interrupts the data transfer to the hard disk drive when the detection means detects that the component device has been moved from a predetermined state.
Preferably, the data transfer control means resumes data transfer to the hard disk drive when the detection means detects that the component device has returned to a predetermined state.
Preferably, the data transfer control means stops data transfer to the hard disk drive while the component device is moved from a predetermined state.

Preferably, the data transfer control means is a DMA control device.
Preferably, the data transfer control means is a bus arbiter.

  According to another aspect of the present invention, there is provided a program that includes a computer, a hard disk drive, and a detection unit that detects a state of at least one component device other than the hard disk drive. And a hard disk drive control step for controlling the hard disk drive based on the received status change of the component device.

  According to the image forming apparatus of the present invention, it is possible to prevent deterioration of data access performance to the hard disk drive even when an impact is predicted.

FIG. 1 is a diagram showing an overview of an image forming apparatus 10 according to the first embodiment of the present invention.
As shown in FIG. 1, the image forming apparatus 10 includes an image forming unit 12 and a document reading device 14. The image forming unit 12 is of a xerographic type, for example, and has, for example, four-stage sheet feeding trays 16a, 16b, 16c, 16d on which sheets are stacked and a manual feed tray 18, and these sheet feeding trays 16a to 16d An image is formed on the sheet supplied from the manual feed tray 18 to the sheet conveyance path 20. Note that when any one of a plurality of components such as the paper feed trays 16a to 16d is indicated without being specified, the paper feed tray 16 may be simply abbreviated.

  The image forming unit 12 forms a latent image on the photoreceptor 22 that is an image carrier, a charger 24 that uniformly charges the photoreceptor 22, and the photoreceptor 22 that is uniformly charged by the charger 24. An exposure device 26, a developing device 28 that visualizes the latent image on the photosensitive member 22 formed by the exposure device 26 with toner, and a transfer device 30 that transfers the toner image formed by the developing device 28 to a sheet. And a cleaner 32 for cleaning the toner remaining on the photosensitive member 22. The exposure device 26 is of, for example, a laser scanning type, and outputs an image of a document read by the reading sensor 52 of the document reading device 14 instead of a laser on / off signal. The transfer device 30 is composed of, for example, a transfer roll, and the sheet onto which the toner image has been transferred by the transfer device 30 is sent to the fixing device 34. The toner image is fixed on the sheet by the fixing device 34, and the toner image is fixed. The discharged sheet is discharged to the discharge tray 36.

  A plurality of sheet conveyance rolls 38 are provided in the sheet conveyance path 20. As one of the sheet conveying rolls 38, a registration roll 40 is disposed in the vicinity of the upstream side of the transfer device 30. The registration roll 40 is controlled to temporarily stop the supplied sheet and supply the sheet to the transfer device 30 in synchronization with the timing at which the latent image is formed on the photosensitive member 22.

  The document reader 14 includes an optical system 42 that optically reads a document and an automatic document feeder 44 such as an ADF (Auto Document Feeder). The optical system 42 includes a lamp 46 that irradiates light on the document, reflection mirrors 48a, 48b, and 48c that reflect light from the document, a lens 50 that converges light from the reflection mirrors 48a to 48c, and the lens 50. And a reading sensor 52 for reading the converged light. The reading sensor 52 is composed of, for example, a CCD. This optical system 42 has a function of fixing the reading mirrors 48a to 48c and the like provided in the vicinity of the end portion thereof and scanning and reading a document sent by an automatic document feeder 44 described later, and the reflection mirrors 48a to 48c and the like. And a function of reading a document placed on the platen 54.

  The automatic document feeder 44 includes a document placement table 56 on which a large number of documents are placed, a document conveyance path 58 that conveys the document, and a discharge table 59 from which the document after the image is read is ejected. The automatic document feeder 44 can be opened and closed, and the lower surface of the automatic document feeder 44 functions as a platen cover that presses the document onto the platen 54.

  For example, a jam removing cover 62 is provided on the side surface of the image forming apparatus 10 so as to be openable and closable. When a jam is caused by a sheet conveyed from the paper feed tray 16, the jam removal cover 62 is opened, so that the jam can be removed.

  In addition, position sensors 60a to 60d are provided in the vicinity of the paper feed trays 16a to 16d, respectively. The position sensors 60a to 60d detect the states of the paper feed trays 16a to 16d, and output the detection results to a control unit described later. For example, the position sensor 60 outputs an on signal when the paper feed tray 16 is inserted and is in a steady position, and outputs an off signal when the paper feed tray 16 is pulled out and is not in a steady position. In this manner, the position sensor 60 constitutes a detection unit that detects the state of the paper feed tray 16.

  Further, the image forming apparatus 10 according to the present embodiment is provided with a sensor (not shown) different from the position sensor 60. For example, sensors for detecting opening / closing of the cover and insertion / removal of the internal unit, such as opening / closing of the platen cover, opening / closing of the manual feed tray 18 and insertion / removal of a toner bottle and a toner collection bottle (not shown), are provided. Similar to the position sensor 60, such a sensor constitutes a detection unit that detects the state of the component device.

FIG. 2 is a diagram illustrating a hardware configuration of the control unit of the image forming apparatus 10 according to the first embodiment of the present invention.
As shown in FIG. 2, the image forming apparatus 10 includes a CPU 100, a memory 102, a memory controller 104 that reads and writes data stored in the memory 102, a hard disk drive (HDD) 106 that includes a head 122 and a disk 124. , An HDD controller 108 that reads and writes data stored in the HDD 106, a DMA 110 that is a control device that controls data transfer to the HDD 106 by a DMA (Direct Memory Access) system, and an external computer via a network (not shown) And a communication interface (IF) 112 for transmitting and receiving data and a user interface (UI) device 114 including a touch panel or a liquid crystal display and a keyboard. These components are connected to each other via a system bus 116.

  When the HDD 106 is energized, the head 122 is loaded and waits for a command from the CPU 100. When the head 122 is loaded, the head 122 is moved onto the rotating disk 124, and the HDD 106 is ready to read and write data. Here, the state where the head 122 is loaded is a state where data is read or written, or a state where operations such as reading or writing can be performed immediately. On the other hand, when the head 122 is unloaded, the head 122 is retracted from the disk 124 to a predetermined location. When the head 122 is unloaded, the HDD 106 is in either a state where the disk 124 is rotating (drive driving state) or a state where the rotation is stopped (sleeping state). The rotation of the disk 124 is stopped, for example, when the DMA 110 described later issues a sleep command.

  Note that the HDD 106 moves the position of the head 122 to, for example, the outside of the disk 124 when a predetermined time elapses after performing the data access operation. This movement operation is executed by firmware (not shown), for example.

  The HDD 106 takes one of the control mode states of an accessible state, a first mode state, and a second mode state. In this example, the HDD 106 shifts between these states based on a change in the state of at least one component device other than the HDD 106 (opening / closing of the cover, insertion / extraction of the component device, etc.). In the state of the first mode, the HDD 106 enters the sleep state after the head 122 is retracted from the disk 124. In the second mode, the HDD 106 retracts the head 122 from the disk 124.

  In the present embodiment, the DMA 110 controls interruption and resumption of data transfer to the HDD 106 between the HDD 106 and other components such as the memory 102. More specifically, when the detection unit such as the position sensor 60 detects the state of the component device, the DMA 110 controls data transfer to the HDD 106 based on the change in the state of the component device. In this example, when the position sensor 60 or the like detects that the component device has been moved from a predetermined state, the DMA 110 interrupts the data transfer to the HDD 106, and the position sensor 60 or the like returns the component device to the predetermined state. When it is detected that data transfer has been performed, data transfer to the HDD 106 is resumed. In this way, the DMA 110 constitutes a data transfer control unit. The DMA 110 may stop data transfer on the HDD 106 side, or may stop data transfer on the system bus 116 side.

  Accordingly, when the change in state is detected during the data write operation or the data read operation, the HDD 106 stops the operation in a unit that can interrupt the operation, such as a sector unit, and shifts to the first mode or the second mode. To do. In this case, when the position sensor 60 or the like detects that the component device has returned to the normal position, the HDD 106 shifts from the first mode or the second mode to a data accessible mode, and the HDD controller 108 interrupts the writing. Resume operation.

  Further, when an HDD access request is generated after it is detected that the state of the component device has changed, the HDD 106 does not perform drive driving or head loading for performing a writing operation or a reading operation. In this case, after the position sensor 60 or the like detects that the component device has returned to the normal position, the HDD 106 shifts from the first mode or the second mode to a data accessible mode, and the HDD controller 108 Perform the specified write or read operation. That is, when the HDD 106 is in either the first mode or the second mode, the HDD controller 108 does not perform a data reading operation and a writing operation.

FIG. 3 is a diagram illustrating the relationship between each component device and the control mode set for each component device.
As shown in FIG. 3, each component device is associated with either the first mode (mode 1) or the second mode (mode 2). In this example, tray 1 (paper feed tray 16a shown in FIG. 1) and tray 2 (paper feed tray 16b) are associated with the first mode, and tray 3 (paper feed tray 16c), platen cover DADF and a post-processing device to be described later are associated with the second mode. The position sensor 60 or the like detects the first state change when the state of the component device set in the first mode changes, and changes the state of the component device set in the second mode. The second state change is detected.

  For example, when the tray 1 is moved from the steady state, the first state change is detected by the sensor, and the HDD 106 of the image forming apparatus 10 shifts to the first mode. Specifically, the HDD 106 retracts the head 122 from the disk 124, stops the rotation of the disk 124, and enters a sleep state.

  For example, when the platen cover is moved from the steady state, the second state change is detected by the sensor, and the HDD 106 shifts to the second mode. Specifically, the HDD 106 retracts the head 122 from the disk 124. The HDD 106 is in a drive driving state, and the disk 124 remains rotated.

FIG. 4 is a diagram illustrating a setting screen for setting the control mode of each component device.
As illustrated in FIG. 4, the setting screen includes a first selection button for selecting mode 1 and a second selection button for selecting mode 2 for each component device. For example, for the tray 1, when the first selection button is pressed, the first selection button is so-called highlighted, and the background of the second selection button changes to gray. The set mode is stored in, for example, the memory 102 of the image forming apparatus 10. Such a setting screen is displayed on the UI device 114.

  The setting screen may be displayed on a display such as an external personal computer (PC) (not shown), and the mode of each component device may be set using a PC keyboard or mouse. In this case, the set contents are transmitted to the image forming apparatus 10 via a network (not shown) and stored in the image forming apparatus 10.

FIG. 5 is a diagram showing a functional configuration of a control program 200 for controlling the state of the HDD 106 in the image forming apparatus 10 according to the embodiment of the present invention.
As illustrated in FIG. 5, the control program 200 includes a setting unit 202, a storage unit 204, a reception unit 206, a determination unit 208, and an HDD control unit 210. With these configurations, the control program 200 accepts that the state change of the component device has been detected by the detection means such as the position sensor 60 and controls the HDD 106 based on the accepted state change. Note that all or part of the functions of the control program 200 may be realized by hardware such as the DMA 110 provided in the image forming apparatus 10.

  For example, the control program 200 is supplied from an external computer connected to a network (not shown) via the communication IF 112, loaded into the memory 102, and hardware is specifically executed on an OS (not shown) operating on the CPU 100. It is executed using. The control program 200 may be stored in a recording medium such as FD, CD, or DVD and supplied to the image forming apparatus 10.

  In the control program 200, the storage unit 204 stores the relationship between each component device and the control mode set for each component device (FIG. 3). The storage unit 204 is realized by at least one of storage devices such as the memory 102 and the HDD 106, for example.

  The setting unit 202 reads the correspondence relationship stored in the storage unit 204, displays the setting screen (FIG. 4) on the UI device 114, receives the setting content input via the UI device 114, and receives the setting content. Store in the storage unit 204. The setting unit 202 registers, updates, and deletes the correspondence relationship stored in the storage unit 204 based on the input setting content. In addition, the setting unit 202 transmits and receives data regarding the correspondence relationship stored in the storage unit 204 to and from an external computer via the communication IF 112.

  The accepting unit 206 accepts from the position sensor 60 or the like that a change in the state of a component device such as the paper feed tray 16 has been detected, and outputs it to the determination unit 208 and the HDD control unit 210. Specifically, the reception unit 206 receives a signal indicating that it has been detected that the component device has been moved from the steady position, and a signal indicating that it has been detected that the component device has been returned to the steady position. . For example, the reception unit 206 receives an off signal from the position sensor 60 when the paper feed tray 16 is pulled out, and an on signal from the position sensor 60 when the paper feed tray 16 is inserted and moved to a steady position. Accept.

  The determination unit 208 determines the control mode set for the component device based on the component device in which the state change is detected and the correspondence relationship stored in the storage unit 204. Specifically, the determination unit 208 determines whether the control mode set for the component device is the first mode or the second mode, and sends the determination result to the HDD control unit 210. Output.

  The HDD control unit 210 controls the HDD 106 based on the state change of the component device detected by the detection unit such as the position sensor 60. Specifically, the HDD control unit 210 controls the HDD 106, the HDD controller 108, and the DMA 110 based on the control mode determined by the determination unit 208. Therefore, the HDD control unit 210 controls the HDD 106 based further on the relationship stored in the storage unit 204.

  In this example, when a change in the state of a component device that is set to the first mode as the control mode is detected, the HDD control unit 210 retreats the head 122 from the disk 124 and further controls the rotation of the disk 124. . For example, the HDD control unit 210 stops driving the disk 124. When a change in the state of the component device that is set to the second mode as the control mode is detected, the HDD control unit 210 controls the position of the head 122. For example, the HDD control unit 210 retracts the head 122 from the disk 124.

  When the detection unit such as the position sensor 60 detects that the component device has returned to a predetermined state from the receiving unit 206, the HDD control unit 210 sets the HDD 106 to an accessible state, The DMA 110 is controlled to resume data access. Specifically, the HDD control unit 210 drives the disk 124 of the HDD 106, loads the head 122, and shifts the HDD 106 from the first mode or the second mode to a data accessible mode.

FIG. 6 is a flowchart of the control process (S10) during data transfer of the image forming apparatus 10 according to the embodiment of the present invention.
As shown in FIG. 6, in step 100 (S100), the HDD controller 108 performs data transfer between the HDD 106 and another component different from the HDD 106. For example, the HDD controller 108 performs burst transfer in a predetermined unit.

  In step 102 (S102), the HDD controller 108 determines whether the data transfer is completed. The HDD controller 108 ends the process when the data transfer is completed, and proceeds to the process of S104 otherwise.

  In step 104 (S104), the receiving unit 206 of the control program 200 detects a change in the state of the constituent device (movable part) such as opening / closing of the cover, insertion / extraction of the constituent device, movement of the constituent device, etc. by the detection means such as the position sensor 60. It is determined whether or not it has been done. The control program 200 proceeds to the process of S106 when a change in the state of the component device is detected, and returns to the process of S100 otherwise.

  In step 106 (S106), the determination unit 208 of the control program 200 refers to the relationship stored in the storage unit 204, and determines whether or not the control mode set for the detected component device is the first mode. Determine whether. The control program 200 proceeds to the processing of S108 when the control mode set for the detected component device is the first mode, and otherwise (for example, when the control mode is the second mode). Then, the process proceeds to S112.

In step 108 (S108), the HDD control unit 210 of the control program 200 controls the HDD. More specifically, the DMA 110 of the HDD controller 108 interrupts the data transfer. Further, the HDD 106 retracts the head 122 from the disk 124.
Further, in step 110 (S110), the HDD 106 stops driving the disk 124 and shifts to the sleep state.

  On the other hand, when the detected control mode of the component device is the second mode, in step 112 (S112), the data transfer is stopped and the head 122 is retracted in the same manner as the process of S108. .

  In step 114 (S114), has the reception unit 206 of the control program 200 received a detection signal indicating that the detection unit such as the position sensor 60 has detected that the component device whose state has changed has been returned to the steady state? Determine whether or not. The control program 200 proceeds to the process of S116 when the accepting unit 206 accepts the detection signal, and returns to the process of S114 otherwise.

  In step 116 (S116), the control program 200 performs a data transfer restart process. Specifically, when the HDD 106 returns from the first mode, the HDD control unit 210 starts driving the disk 124 and loads the head 122. When the HDD 106 returns from the second mode, the HDD control unit 210 loads the head 122 onto the rotating disk 124. Thereafter, the control process returns to the process of S100.

FIG. 7 is a flowchart of the control process (S20) before data transfer of the image forming apparatus 10 according to the embodiment of the present invention. Of the processes shown in FIG. 7, the same reference numerals are assigned to substantially the same processes as those shown in FIG. 6.
As shown in FIG. 7, in the process of S104, the receiving unit 206 of the control program 200 determines whether or not a state change of the component device (movable part) is detected. The process proceeds to the process. If not, the process returns to S104.

In the process of S106, the determination unit 208 determines whether or not the detected control mode is set to the first mode, and the control program 200 determines that the set control mode is the first mode. If it is the mode, the process proceeds to S110, and if not, the process proceeds to S114.
When the set control mode is the first mode, in step S110, the HDD 106 stops driving the disk 124 and shifts to the sleep state.

  In the process of S114, the reception unit 206 of the control program 200 determines whether or not the detection unit has received a detection signal indicating that the component device whose state has changed has been returned to the steady state. In step 200, if the receiving unit 206 receives the detection signal, the process proceeds to step S200. If not, the process returns to step S114.

  In step 200 (S200), when an HDD access request is accepted, the disk 124 of the HDD 106 is driven, the head 122 is loaded, and data transfer processing is executed.

  As described above, the image forming apparatus 10 according to the embodiment of the present invention uses the HDD 106 when an operation that can shock the HDD 106 such as movement of components such as the paper feed tray 16 is performed by the user. Since the HDD 106 is shifted to an accessible state after the component device returns to a steady state without being operated, the write data can be protected. Similarly, the image forming apparatus 10 can prevent a decrease in performance of the reading operation.

  Furthermore, the image forming apparatus 10 according to the embodiment of the present invention retracts the head 122 and then moves the disk 124 to the disk 124 when a change in the state of the component device in which the first mode is set as the control mode is detected. When the driving is stopped and a change in the state of the component device set in the second mode is detected, the head 122 is retracted, and the disk 124 remains driven. For this reason, even when an impact is predicted, it is possible to prevent deterioration in data access performance to the HDD 106.

Next, an image forming apparatus 10 according to the second exemplary embodiment of the present invention will be described.
FIG. 8 is a diagram illustrating a hardware configuration of a control unit of the image forming apparatus 10 according to the second embodiment of the present invention. Of the components shown in FIG. 8, the same components as those shown in FIG. 2 are denoted by the same reference numerals.
As shown in FIG. 8, the control unit of the image forming apparatus 10 according to the present embodiment has a configuration in which a bus arbiter 118 is added to the control unit of the image forming apparatus 10 according to the first embodiment.

  The bus arbiter 118 controls data transfer on the system bus 116. In this example, the bus arbiter 118 controls interruption and resumption of data transfer between the HDD 106 and other components. Here, the bus arbiter 118 suspends and resumes the data being transferred in a predetermined unit. In this way, the bus arbiter 118 constitutes a data transfer control means.

Next, an image forming apparatus 10 according to a third embodiment of the present invention will be described.
FIG. 9 is a diagram showing an outline of an image forming apparatus 10 according to the third embodiment of the present invention. 9 that are substantially the same as those shown in FIG. 1 are denoted by the same reference numerals.
As shown in FIG. 9, the image forming apparatus 10 according to the present embodiment has a configuration in which an external sheet supply device 64 and a post-processing device 68 are added to the image forming device 10 according to the first embodiment. .

  The external sheet supply device 64 includes, for example, two-stage option trays 66a and 66b. When one of the option trays 66a and 66b is selected, a sheet is supplied from one of the selected option trays 66a and 66b to the sheet conveyance path 20. The external sheet supply device 64 is provided with a sensor (not shown) as a detection means in the vicinity of the option tray 66. This sensor detects the state of the option tray 66 and outputs it to the control unit. For example, the sensor detects that the option tray 66 has been opened and closed. Further, the external sheet supply device 64 is provided with a jam removal cover (not shown) and a sensor for detecting the state of the jam removal cover.

  The post-processing device 68 includes, for example, a stapler 70 and the like, and is selectively used according to the selection of the UI device 114. When the stapler 70 is not selected, the stapler 70 is discharged as it is to the sheet discharge trays 72a and 72b. The post-processing device 68 may include a sorting device. Similarly to the external sheet supply device 64, the post-processing device 68 is also provided with a jam removal cover and a sensor that detects the state of the jam removal cover. This sensor also detects the state of the jam removal cover and outputs it to the control unit.

  Therefore, the image forming apparatus 10 according to the present embodiment detects the state of constituent devices such as opening and closing of a jam removal cover provided in the external sheet supply device 64 and the post-processing device 68, and based on the detected state change. The HDD 106 is controlled.

1 is a diagram showing an outline of an image forming apparatus 10 according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a hardware configuration of a control unit of the image forming apparatus 10 according to the first embodiment of the present invention. It is a figure which shows the relationship between each component apparatus and the control mode set to each component apparatus. It is a figure which illustrates the setting screen which sets the control mode of each component apparatus. 3 is a diagram illustrating a functional configuration of a control program 200 for controlling the state of the HDD 106 in the image forming apparatus 10 according to the embodiment of the present invention. FIG. FIG. 6 is a flowchart of control processing (S10) during data transfer of the image forming apparatus 10 according to the embodiment of the present invention. It is a figure which shows the flowchart of the control processing (S20) before the data transfer of the image forming apparatus 10 which concerns on embodiment of this invention. It is a figure which shows the hardware constitutions of the control part of the image forming apparatus 10 which concerns on the 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the image forming apparatus 10 which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 12 Image forming part 14 Document reading apparatus 16 Paper feed tray 18 Manual tray 44 Automatic document feeder 54 Platen 56 Document placing table 60 Position sensor 62 Jam removal cover 64 External sheet supply device 66 Optional tray 68 Post-processing device 106 HDD
108 HDD controller 118 Bus arbiter 122 Head 124 Disk 200 Control program 202 Setting unit 204 Storage unit 206 Reception unit 208 Determination unit 210 Control unit

Claims (15)

A hard disk drive,
Detecting means for detecting the state of at least one component device other than the hard disk drive;
An image forming apparatus comprising: a hard disk drive control unit that controls the hard disk drive based on a state change of the component device detected by the detection unit. The hard disk drive has a head and a disk,
The hard disk drive control means controls the drive of the disk when the first change in state is detected by the detection means, and determines the position of the head when the second change in state is detected by the detection means. The image forming apparatus according to claim 1, wherein the image forming apparatus is controlled. The image forming apparatus according to claim 2, wherein the hard disk drive control unit stops the rotation of the disk when the detection unit detects a first state change. The image forming apparatus according to claim 2, wherein the hard disk drive control unit retracts the head when the detection unit detects a second state change. 5. The image forming apparatus according to claim 1, wherein the hard disk drive control unit makes the hard disk drive accessible when the detection unit detects that the component device has returned to a predetermined state. 6. The component equipment is plural,
The image forming apparatus according to claim 1, further comprising a storage unit that stores a relationship between each component device and a control mode set for each component device. The image forming apparatus according to claim 6, wherein the hard disk drive control unit controls the hard disk drive further based on a relationship stored in the storage unit. The image forming apparatus according to claim 1, further comprising a data transfer control unit that controls interruption and resumption of data transfer to the hard disk drive. The image forming apparatus according to claim 8, wherein the data transfer control unit controls data transfer to the hard disk drive based on a state change detected by the detection unit. 10. The image forming apparatus according to claim 8, wherein the data transfer control unit interrupts data transfer to the hard disk drive when the detection unit detects that the component device has been moved from a predetermined state. 11. The image forming apparatus according to claim 8, wherein the data transfer control unit restarts data transfer to the hard disk drive when the detecting unit detects that the constituent device has returned to a predetermined state. . The image forming apparatus according to claim 8, wherein the data transfer control unit stops data transfer to the hard disk drive while a component device is moved from a predetermined state. The image forming apparatus according to claim 8, wherein the data transfer control unit is a DMA control apparatus. The image forming apparatus according to claim 8, wherein the data transfer control unit is a bus arbiter. In an image forming apparatus including a computer, a hard disk drive, and detection means for detecting a state of at least one component device other than the hard disk drive,
An accepting step for accepting that the state change of the component device has been detected by the detecting means;
And a hard disk drive control step of controlling the hard disk drive based on the received status change of the component device.

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