JP2007334906A - Image processor, disk protection method therefor, and control program for executing disk protection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processor provided with an inexpensive hard disk protection means, capable of avoiding a start-up trouble caused by a defective sector occurring by breakage of an electric power source during an access to a hard disk. <P>SOLUTION: An instruction of not permitting turning-off of an electric power source switch 401 is transmitted to a user, when an interruption is generated by a detection signal DS of a lid 501 (S11). A CPU 2001 suspends the access to an HDD 2004, stops write-in for a new data (S13), and transmits an instruction of permitting the turning-off of the electric power source switch after waiting for a lapse of a prescribed time (S14). The prescribed waiting time is the time in the longest case out of the times required for writing all the buffer data in the HDD into hard disk media. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image processing apparatus including a multi-function system having a plurality of functions, a disk protection method thereof, and a control program for executing the disk protection method.

  It is known that if the power is cut off while writing data to the hard disk medium, the sector being written becomes defective, and the system startup is hindered when the next power supply is turned on. For this reason, a system having a hard disk such as a personal computer often includes a protection means when the power is shut off during data writing to the hard disk medium. There are various protection means such as those having an auxiliary power source and those having means for backing up data (see, for example, Patent Document 1).

Also, in the power-off / connection device of the magnetic disk drive unit, a configuration is known in which the power supply is not stopped when it is determined that even if the power OFF switch is operated, the recording / reproducing process of the magnetic disk drive is adversely affected (for example, , See Patent Document 2). Further, for protection of the hard disk, a configuration is also known in which access to the hard disk is stopped when a power interruption is detected (see, for example, Patent Document 3).
JP 05-94237 A JP 05-314631 A JP 07-153172 A

  However, with the conventional hard disk protection means, it takes a lot of cost to protect the data on the hard disk media, and it is difficult to incorporate the protection means into a system that aims for a low price. Furthermore, in a system provided with data backup means, the total data transfer amount increases, and there is a concern that system performance deteriorates.

  In addition, even if the power OFF switch is operated, if it is determined that the recording / reproducing process of the magnetic disk drive is adversely affected, the configuration in which the power supply is not stopped cannot cut off the power when the user desires. was there. In particular, in an image processing apparatus that handles a large amount of image data, a hard disk failure due to a power interruption causes a great hindrance to the processing of image data read by a scanner using a large amount of memory or the development of a large amount of print jobs.

  Therefore, in order to prevent power interruption during data writing to the disk medium, a solution that does not deteriorate performance with a minimum loss of time and is low in cost has been desired. In addition, there has been a demand for a solution that can shut off the power supply when the user desires and that does not damage the disk.

  In view of the above-described conventional problems, the present invention provides an inexpensive disk protection means capable of reliably avoiding a start failure due to a sector failure caused by a power failure while accessing a disk without deteriorating performance. An image processing apparatus including the same, a disk protection method thereof, and a control program for executing the disk protection method.

  In order to achieve the above object, an image processing apparatus according to the present invention comprises an image processing apparatus having a data storage disk, the disk having a disk medium and buffer means for storing data in the disk medium. Detecting means for detecting a user operation for shutting off the main power supply of the image processing apparatus; and when the operation is detected by the detecting means, the access operation to the disk is interrupted, and new data Access interrupting means for preventing writing, media writing processing means for writing data already written in the buffer means to the disk when the operation is detected by the detecting means, Notification means for notifying information relating to shut-off of the main power supply, the media writing processing means Based on whether the write processing by said notification means is characterized by notifying whether or shut off the main power.

  In order to achieve the above object, a disk protection method for an image processing apparatus according to the present invention is a disk protection method for an image processing apparatus having a disk medium and a data storage disk including buffer means for writing data to the disk medium. And detecting a user operation for shutting off the main power supply of the image processing apparatus, and when the operation is detected by the detection process, the access operation to the disk is interrupted and a new data And a media writing processing step for performing processing for writing data already written in the buffer means to the disk medium when the operation is detected by the detecting step, and Based on whether or not the writing process in the media writing process Characterized by a step of notifying whether or shut off the main power supply by informing means.

  In order to achieve the above object, a control program for executing a disk protection method for an image processing apparatus according to the present invention includes a disk for data storage including a disk medium and buffer means for writing data to the disk medium. A control program for executing a disk protection method for an image processing apparatus, the detection step detecting a user operation for shutting off a main power supply of the image processing apparatus, and the operation detected by the detection step The operation of accessing the disk is interrupted and new data is not written, and the data already written in the buffer means when the operation is detected by the detecting step. Is a media writing process step for writing to the disk medium. If, based on whether the write processing by the media writing process step, characterized in that a step of notifying whether or shut off the main power supply by informing means.

  As described above in detail, according to the present invention, it is possible to reliably avoid a start-up failure that occurs due to power being shut off during access to a disk with an inexpensive configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
<System configuration>
FIG. 1 is a block diagram showing a system configuration in which a multi-function system that is an image processing apparatus according to the first embodiment of the present invention is mounted.

  In the figure, reference numeral 101 denotes a network using a known technology for connecting devices. In this embodiment, it is assumed that Ethernet (registered trademark) using the TCP / IP protocol is used. A network scanner 102, a personal computer (PC) 103, a fax (FAX) 104, and network printers 106, 107 and 108 are connected to the network 101.

  The network scanner 102 is a device that has a network interface and optically reads a document printed on paper or the like. For example, the network scanner 102 captures an image in three colors of R (red), G (green), and B (blue). It is a color scanner to read.

  The fax 104 includes a network interface and transmits / receives image data via the public line 105. The fax 104 transmits image data read by the scanner 102 on the network 101, outputs received image data from the network printers 106, 107, and 108, and converts image data to be filed by a personal computer (PC) 103. It is also an interface for inputting and outputting on the public line 105.

  The network printers 106, 107, and 108 have a network interface, receive print data and image data sent via the network interface, and actually use a known printing technique such as an electrophotographic technique on media such as paper. A printing apparatus that performs printing, and is connected to each device via a network 101. Here, reference numeral 106 denotes a black and white laser beam printer, 107 denotes a color laser printer, and 108 denotes a black and white digital multi-function peripheral which is a multifunction system according to the present embodiment.

<Functional configuration of multi-function system>
FIG. 2 is a block diagram showing a functional configuration of the multi-function system (monochrome digital multifunction peripheral) 108 shown in FIG.

  The multifunction system 108 includes a controller unit 200, an operation unit 312, a scanner 270, and a printer 295.

  The controller unit 200 is connected to a scanner 270 that is an image input / output device and a printer 295 that is an image output device, and is connected to a LAN 2011 or a public line (WAN) 2051 to input / output image information and device information. It functions as a control device for performing.

  Hereinafter, the internal configuration of the controller unit 200 will be described. In FIG. 2, a CPU 2001 is a controller that controls the entire system. A RAM 2002 is a system work memory for the operation of the CPU 2001, and is also an image memory for temporarily storing image data. A ROM 2003 is a boot ROM, and stores a system boot program. The data storage HDD 2004 includes a hard disk medium, a buffer for writing data to the hard disk medium, a hard disk drive, and an IDE controller, and stores system software, image data, and management information thereof.

  The operation unit I / F 2006 is an interface unit with the operation unit (UI) 312 and outputs image data to be displayed on the operation unit 312 to the operation unit 312. Also, it plays a role of transmitting information input by the system user from the operation unit 312 to the CPU 2001. A network 2010 is connected to the LAN 2011 and inputs / outputs information. A modem 2050 is connected to the public line 2051 and inputs / outputs information. The above devices are arranged on the system bus 2007.

  An image bus I / F 2005 is a bus bridge that connects a system bus 2007 and an image bus 2008 that transfers image data at high speed and converts a data structure. The image bus 2008 is configured by a PCI bus or IEEE1394. Raster image processor (RIP) 2060, device I / F unit 2020, scanner image processing unit 2080, printer image processing unit 2090, image rotation unit 2030, and image compression unit 2040 are connected to image bus 2008. ing.

  The raster image processor 2060 expands the PDL code into a bitmap image. A device I / F unit 2020 connects the scanner 270 or printer 295 to the controller unit 200 and performs synchronous / asynchronous conversion of image data. A scanner image processing unit 2080 corrects, processes, and edits input image data, and a printer image processing unit 2090 performs printer correction, resolution conversion, and the like on print output image data. An image rotation unit 2030 rotates image data, and an image compression unit 2040 performs compression / expansion processing on multi-valued image data using the JPEG method, and also performs binary image data compression / expansion processing on the JBIG, MMR, and MH methods. Do.

<Appearance of multi-function system>
FIG. 3 is an external view of the multifunction system 108 shown in FIG.

  The scanner 270 of the multi-function system scans a CCD line sensor (not shown) while projecting an image on a document sheet, thereby converting the document image into an electrical signal as raster image data. When the apparatus user sets original paper on the tray 273 of the original feeder 272 and issues a reading start instruction from the operation unit 312, the controller CPU 2001 gives an instruction to the scanner 270 (2071 in FIG. 2), and the feeder 272 The original paper is fed one by one and the original image is read.

  The printer 295 is a device that converts raster image data into an image on paper. As a method thereof, an electrophotographic method using a photosensitive drum or a photosensitive belt, or ink is ejected from a micro nozzle array on a paper. There is an ink jet method for directly printing an image, but any method may be used.

  Activation of the printing operation is started by an instruction 2096 from the controller CPU 2001. The printer 295 is provided with a plurality of paper feed stages so that different paper sizes and paper orientations can be selected, and paper cassettes 311, 312, 313, and 314 corresponding thereto are detachably mounted. Then, the printed paper is discharged to the paper discharge tray 310.

<Operation unit>
FIG. 4 is a diagram showing an external configuration of the operation unit 312 of the multifunction system 108 shown in FIG.

  The LCD display unit 313 has a touch panel sheet pasted on the LCD, displays a system operation screen, and transmits position information to the controller CPU 2001 when a displayed key is pressed. The start key 314 is used when starting a document image reading operation. At the center of the start key 314, there are two colors of LEDs 318 (light emitting diodes) as green and red as a notification means, and indicates whether or not the start key 314 can be used depending on the color emitted by the light emitting diode. A stop key 315 serves to stop an operation in operation. The ID key 316 is used when inputting the user ID of the user, and the reset key 317 is used when initializing the setting from the operation unit 312.

<Power control system>
FIG. 5 is a block diagram of the power supply control system of the multifunction system shown in FIG.

  In the figure, 401 is a main power switch, and 402 is a power unit.

  The power supply unit 402 is a unit for supplying power to the controller unit 200 and the HDD 2004 described above, and converts an alternating current (AC) input supplied via the main power switch 401 into a direct current (DC). .

<Hard Disk Protection Means According to First Embodiment>
Next, means (hard disk protection means) for protecting the hard disk medium when the power is cut off during data writing to the hard disk medium, which is a data storage disk, which is a feature of the present embodiment will be described.

  FIG. 6A is a diagram showing a configuration for detecting in advance a power shutdown, and a push button type main unit incorporating a main power cover 501, a lid receiver 502, and an LED as a notification means. The power switch 401 (in this case, a switch for cutting off the main power supply) and a spring control unit 507 for mechanically controlling the position of the main power switch 401 are included.

  The main power supply lid 501 as a protection means for protecting the main power supply switch 401 is opened by the user slidingly as shown in FIG. It is essential to release the protection means for protecting the power switch 401. By this releasing operation, the contact 503 provided on the lid 501 comes into contact with the contact 504 on the lid receiving portion 502. At the time of release (detection timing), the contact 504 is at the GND level, and the detection timing information generates an interrupt to the CPU 2001 as the detection signal DS of the lid 501. Connections around the CPU 2001 and the HDD 2004 are shown in FIG.

  The CPU 2001 performs the following processing in response to the interruption of the detection signal DS of the lid 501. FIG. 7A is a flowchart showing a transfer algorithm to the HDD 2004 and an LED control algorithm.

  First, when an interrupt is generated by the detection signal DS of the lid 501 (step S11), the red portion of the LED 401a as a notification unit is turned on (step S12). Thereby, the user is informed that turning off the main power switch 401 is not permitted.

  Thereafter, the CPU 2001 interrupts the access (access operation) to the HDD 2004 (buffer means side) so as not to write new data to the HDD 2004 (buffer means side) (step S13). (Step S14), the red LED 401a is turned off (step S15), and the green LED 401b as a notification unit is turned on (step S16). After confirming that the lighting of the LED changes from red to green, the user turns off the main power switch 401 as shown in FIG.

  As a result, it is possible to avoid shutting off the main power supply while the hard disk medium is being accessed. Once the main power switch 401 is pressed, the spring control unit 507 keeps the pressed state.

  Next, a method for determining the predetermined waiting time described above will be described in detail.

  FIG. 8A is a flowchart showing the waiting time setting algorithm in step S14 shown in FIG.

  First, when an operation mode in which a transfer to the data storage HDD 2004 starts and a transfer request is input to the CPU 2001 (step S21), the CPU 2001 issues a transfer command to the HDD 2004 as a media write process (step S21). S22). When a transfer command to the HDD 2004 is issued, DMA transfer to the HDD 2004 is performed, and when the transfer of the set size is completed, the CPU 2001 receives a transfer end interrupt (step S23).

  The CPU 2001 adds the set transfer size every time a transfer end interrupt is received (step S24). If the accumulated value does not reach the buffer size in the hard disk medium (step S25), the process returns to step S22 to continuously issue a transfer command, continues the DMA transfer to the HDD 2004, receives an interrupt again, and adds the transfer size. I will do it.

  When the cumulative value reaches the buffer size in the hard disk medium (disk transfer time measurement result) (step S25), the total transfer time (disk transfer time) is calculated, and this time exceeds the past maximum value. In such a case (step S26), a predetermined waiting time is reset (step S27). If the total transfer time does not exceed the past maximum value in step S26, the set value is held as it is.

  The predetermined waiting time determined in this way is based on the longest case of the time required to write all the data in the buffer in the HDD 2004 to the hard disk medium. Therefore, the detection signal DS of the lid 501 as described above is used. When a predetermined waiting time elapses after receiving the interrupt, all data existing in the buffer in the HDD 2004 is written to the medium by the medium writing process. Therefore, when the green LED 401b is lit, even if the user turns off the main power switch 401, the occurrence of a hard disk failure can be avoided.

  When starting the power supply, the main power switch 401 is turned off again, so that the main power switch 401 returns to the state of FIG. 6A by the action of the spring control unit 507 and can be turned on. At this time, while the cover 501 is empty, the CPU 2001 is interrupted by the above configuration, and access to the HDD 2004 (access operation) is interrupted. The user must close the lid 501 to start access to the HDD 2004. Therefore, in order to prompt the user not to forget this operation, it is necessary to generate a display as shown in FIG. 8B on the display unit 313 of the operation unit 312.

  As described above, in the present embodiment, in a multi-function system having an HDD for storing data, when the detection means (the main power switch cover 501 or the like) detects the action of the user shutting off the main power, When the red LED 401a is turned on, the power off is not permitted. At the same time, writing to the hard disk medium is interrupted in advance, and after a sufficient time has elapsed until the writing to the hard disk medium is completed, Then, a confirmation message as to whether or not the main power supply can be shut off is notified by lighting of the green LED 401b. A sufficient time until the writing to the hard disk medium is completely completed is set based on the result of automatically measuring the worst case in the transfer time corresponding to the buffer capacity of the HDD 2004 during the normal operation.

  As a result, it is possible to avoid in advance a start-up failure due to a sector failure due to the power being shut off during the writing of data to the hard disk medium.

  In the present embodiment, the LED 401a is lit red to indicate power-off disapproval, and the confirmation message as to whether or not the main power supply can be shut off is indicated by the green LED 401b being lit. A speaker may be attached to 401 instead of the LED to alert the user as a voice message. That is, when the red LED 401a is turned on, a voice message not permitting power off is output to the user, and when the green LED 401b is turned on, a voice message for confirming whether the main power supply can be shut off is output. . Further, the same display may be performed on the LCD display unit 313.

  In this embodiment, the worst case in the transfer time corresponding to the buffer capacity of the HDD 2004 is automatically measured for a sufficient time until the data held in the HDD 2004 buffer is completely written to the hard disk medium. However, the present invention is not limited to this, and it may be a predetermined time sufficient to perform normal transfer.

[Second Embodiment]
The second embodiment differs from the first embodiment described above only in the hard disk protection means, and the configuration described with reference to FIGS. 1 to 4 is the same.

<Hard Disk Protection Means According to Second Embodiment>
The hard disk protection means according to the second embodiment of the present invention will be described below.

  FIG. 9 is a block diagram showing a power supply control system of the multifunction system according to the second embodiment of the present invention.

  The power supply control system includes a main power supply 1001, a sub power supply 1002, a reset circuit 1003, a relay control circuit 1004, a relay 1005, and a main power switch 401.

  The main power supply 1001 is a unit for supplying power to the controller unit 200 and the HDD 2004 described above, and converts alternating current (AC) input into direct current (DC). The main power supply 1001 supplies most of the power of this system.

  The sub power supply 1002 is used to supply DC to the reset circuit 1003 in response to ON / OFF of the main power switch 401, and is configured by a power supply unit having a much smaller capacity than the main power supply 1001.

  Hereinafter, the operation of the power supply control system will be described with reference to the flowcharts of FIGS. 10 (a) and 10 (b). 10A is a flowchart showing a flow of power control when the main power switch 401 is turned on, and FIG. 10B is a flow of power control when the main power switch 401 is turned off. It is a flowchart which shows.

  First, in FIG. 10A, when the main power switch 401 is turned on (step S31), the AC power supply AC is turned on to the sub power supply 1002. The sub power supply 1002 generates a DC power supply, and the reset circuit 1003 receives the “H” level of the reset signal in response to the DC power supply (step S32).

  When receiving the “H” level of the reset signal, the relay control circuit 1004 turns on the relay 1005 (step S33). As a result, the AC power supply AC is supplied to the main power supply 1001, and thus the power is supplied to the controller unit 200 and the HDD 2004.

  When power is supplied to the controller unit 200, the power / down signal, which is the output signal of the controller unit 200, is deasserted to "H" level (step S34). The relay control circuit 1004 continues to turn on the relay 1005 as long as either the reset signal or the power / down signal is at “H” level.

  In FIG. 10B, when the main power switch 401 is turned off (step S41), the AC power supply AC supplied to the sub power supply 1002 is interrupted and the output DC power supply is cut off. 1003 outputs the "L" level of the reset signal (step S42). Since the reset output of the reset circuit 1003 is also used as an interrupt signal to the CPU 2001 in the controller unit 200, the CPU 2001 of the controller unit 200 can know the reset output timing of the reset circuit 1003.

  When the CPU 2001 of the controller unit 200 receives the interrupt (step S43), first, the access (access operation) to the data storage HDD 2004 is interrupted and new data is not written to the HDD 2004 (step S43). S44).

  The hard disk normally has a buffer unit and a media unit, and data existing in the buffer unit in the hard disk is written to the media unit even after the access of the controller unit 200 is interrupted. In recent years, the capacity of this buffer tends to increase, and the time difference from the interruption of access to the end of media transfer cannot be ignored. For this reason, the “predetermined time”, which is this time difference, is counted by a routine described later (step S45), the timing when the writing operation to the HDD 2004 is not being performed is found, and the power / down signal is output to the “L” level ( Step S46). As a result, both the power down signal and the reset signal become “L” level, so that the relay control circuit 1004 turns off the relay 1005 (step S47).

  When the relay 1005 is turned off, the AC power source AC is not supplied to the main power source 1001, the power source of the main controller unit 200 and the HDD 2004 is shut off, and the system is stopped.

  As described above, according to the present embodiment, since it is confirmed that the HDD 2004 is not in the write operation state, the power supply is shut down, so that it is possible to suppress the risk of starting failure due to the occurrence of a defective sector in the HDD 2004.

  The predetermined waiting time determination method in step S45 described above is the same as that described in the first embodiment with reference to FIG. The predetermined waiting time determined in this way is based on the longest case among the time sufficient to write all the data in the buffer unit in the HDD 2004 to the medium. When a predetermined waiting time elapses after receiving an interrupt generated at the time of turning off, all the data existing in the buffer unit in the HDD 2004 is written on the medium. Therefore, when the above-described relay 1005 is turned off, the writing operation of the HDD 2004 is completely completed, so that it is possible to avoid the occurrence of a problem associated with the power shutdown.

  7A, FIG. 8A, FIG. 10A, and FIG. 10B are stored in the controller unit 200 in the ROM 2003, for example, and operated. A control method can be realized.

  In each of the above embodiments, the description is limited to the protection of the hard disk. However, the present invention can also be applied to a case where the power is shut off during data writing to another recording medium by the same method. That is, as long as it can prevent the system from being hindered, it is not limited to a hard disk, but other media (for example, floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD). -R, magnetic tape, non-volatile memory card, ROM), it goes without saying.

  The present invention is not limited to the apparatus of the above-described embodiment, and may be applied to a system constituted by a plurality of devices or an apparatus constituted by one device. That is, the multi-function system has been described. However, the present invention is not limited to this, and a printer device, a scanner device, or a facsimile device may be used. A storage medium storing the CPU program code for realizing the functions of the above-described embodiments is supplied to the system or apparatus, and the computer (or CPU or MPU) of the system or apparatus reads the program code stored in the storage medium. It goes without saying that it is completed by executing.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying the program code, for example, a floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM should be used. Can do. Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instruction of the program code performs the actual processing. It goes without saying that a case where the functions of the above-described embodiment are realized by performing part or all of the above and the processing thereof is included.

  Furthermore, after the program code read from the storage medium is written to the memory provided in the function expansion board inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the next program code. It goes without saying that the CPU of the expansion board or the expansion unit performs the processing of the extended function to perform part or all of the actual processing, and the function of the above-described embodiment is realized by the processing. .

It is a block diagram which shows the system configuration | structure of the multifunction system which concerns on 1st Embodiment. It is a block diagram which shows the function structure of the multifunction system shown in FIG. It is an external view of the multifunction system shown in FIG. It is a figure which shows the external appearance structure of the operation part of the multifunction system shown in FIG. FIG. 2 is a block diagram of a power supply control system of the multifunction system shown in FIG. 1. It is a figure which shows the structure of the hard-disk protection means which concerns on 1st Embodiment. It is a figure which shows operation | movement of 1st Embodiment. It is a figure which shows operation | movement of 1st Embodiment. It is a block diagram which shows the power supply control system of the multifunction system which concerns on 2nd Embodiment. It is a figure which shows operation | movement of 2nd Embodiment.

Explanation of symbols

200 Controller unit 401 Main power switch 401a, 401b LED
402 Power supply unit 501 Main power supply cover 502 Cover receiving portion 507 Spring control unit 1001 Main power supply 1002 Sub power supply 1003 Reset circuit 1004 Relay control circuit 1005 Relay 2004 HDD

Claims (9)

In an image processing apparatus having a disk for storing data,
The disk has a disk medium and buffer means for storing data in the disk medium,
Detecting means for detecting a user operation for shutting off a main power supply of the image processing apparatus;
An access interruption means for interrupting an access operation to the disk and not writing new data when the operation is detected by the detection means;
Media writing processing means for writing data already written in the buffer means to the disk when the operation is detected by the detecting means;
An informing means for informing information relating to the shutoff of the main power supply,
The image processing apparatus according to claim 1, wherein the notifying unit notifies whether or not the main power supply may be shut off based on whether or not the writing process by the media writing processing unit is performed.   2. The image processing apparatus according to claim 1, wherein the detection timing of the detection means is when a protection means for protecting a main power switch for cutting off the main power supply is released.   The image processing apparatus according to claim 2, wherein the notification unit causes a light emitting diode built in the main power switch to emit light.   4. The image processing apparatus according to claim 1, wherein when the writing process is performed by the media writing processing unit, the notification unit outputs that the main power supply is not permitted to be cut off. 5. .   5. The image processing according to claim 1, wherein when the writing process by the media writing processing unit is finished, the notification unit outputs that the main power supply is cut off. 6. apparatus.   6. The method according to claim 1, wherein whether or not a writing process is performed by the media writing processing unit is determined based on whether or not a predetermined time has elapsed since the detection unit detected the operation. An image processing apparatus according to 1.   7. The image processing apparatus according to claim 6, wherein the predetermined time is calculated based on a measurement result of a disk transfer time performed during a normal operation. In a disk protection method for an image processing apparatus having a disk for storing data including a disk medium and buffer means for writing data to the disk medium,
A detection step of detecting a user operation for shutting off a main power supply of the image processing apparatus;
A step of interrupting an access operation to the disk and not writing new data when the operation is detected by the detection step;
A media write processing step for performing a process of writing data already written in the buffer means to the disk media when the operation is detected by the detection step;
A disc protection method for an image processing apparatus, comprising: notifying a main power supply by an informing means based on whether or not the writing process in the media writing process step is performed. A control program for executing a disk protection method of an image processing apparatus having a disk for storing data including a disk medium and buffer means for writing data to the disk medium,
A detection step of detecting a user operation for shutting off a main power supply of the image processing apparatus;
A step of interrupting an access operation to the disk and not writing new data when the operation is detected by the detection step;
A media writing processing step for performing processing for writing data already written in the buffer means to the disk media when the operation is detected by the detecting step;
And a step of notifying whether or not the main power supply may be shut off based on whether or not the writing process in the media writing process step is performed.

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