JP2009181278A - Electronic device, boot processing method, and boot processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device, a boot processing method, and a boot processing program which can download necessary data from an external memory in a short time. <P>SOLUTION: The electronic device includes: an external memory confirmation section 200 for confirming that an external memory 100 is mounted according to that a main power supply has been turned on; a management information reading section 201 for accessing a management information area of the external memory 100 when the external memory 100 being mounted is confirmed to read predetermined management information; a retrieval section 202 for retrieving an authentication file from the predetermined management information read with the management information reading section 201; an authentication section 203 for authenticating by the authentication file retrieved with the retrieval section 202; a data reading section 204 for accessing a data area in the external memory 100 when authentication has been completed with the authentication section 203 to read predetermined actual data; and a writing section 205 for writing, in a memory 206, the actual data read with the data reading section 204. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device that executes boot processing in response to power-on, a boot processing method, and a boot processing program.

  In a mobile phone, each time a new function is added, the program area for storing the program increases, and much time is required for downloading and writing the program.

  From such a background, the program transfer method using a serial interface is shifted to a data transfer method using USB (Universal Serial Bus), and further, data transfer such as a method of transferring and writing data from an external memory is performed. Various methods for speeding up writing have been proposed.

  Further, according to Patent Document 1, a technique has been proposed in which a software program is downloaded securely to a receiver that receives video, safely and efficiently to a memory.

Further, according to Patent Document 2, a technique for performing efficient processing that is optimal for a mobile terminal device without downloading an external device for downloading ROM data necessary for a device has been proposed.
JP 2005-531846 A JP 2001-188686 A

  Here, a case will be considered in which a method of reading predetermined data from an external memory and writing the read predetermined data to the internal memory using Patent Document 1 or Patent Document 2 is considered.

  First, in order to read (download) data from a file on an external memory, the mobile phone is in a state where the file system is operating, that is, after the main power is turned on, a boot process is performed, and an OS (Operating System) initial stage It is necessary to complete the processing such as conversion and to be in an operable state (call waiting state).

  In this way, in order to download predetermined data from the external memory using Patent Document 1 and Patent Document 2, it is necessary to wait for the time from when the power is turned on until the call transition state is entered. It is difficult to shorten the time until data is acquired.

  In addition, when downloading data from an external memory on a mobile phone, to prevent the user from rewriting data by mistake, a specific command is sent to the mobile phone by connecting a USB cable, etc. In order to realize stable download, it is necessary to set a mode for blocking radio wave reception so that the mobile phone cannot receive incoming calls, and there is a problem that the time until data acquisition cannot be shortened.

  SUMMARY An advantage of some aspects of the invention is that it provides an electronic apparatus, a boot processing method, and a boot processing program that can read data from an external storage unit. is there.

  In order to solve the above problems, an electronic device according to the present invention is an external storage configured by a management information area in which management information is stored in accordance with a predetermined file system and a data area in which actual data is stored. In an electronic apparatus having a mounting unit to which a unit is mounted and a boot processing unit that performs a predetermined boot process, the boot processing unit stores the external storage in the mounting unit in response to power-on. An external storage unit confirmation unit for confirming that the external storage unit is attached, and the external storage unit confirmation unit when the external storage unit confirmation unit confirms that the external storage unit is attached to the attachment unit. Data reading means for accessing the data area and reading predetermined real data; and writing means for writing the real data read by the data reading means to a predetermined storage unit. The features.

  In the electronic device, when it is confirmed by the external storage unit confirmation means that the external storage unit is attached to the attachment unit, the management information area of the external storage unit is accessed and predetermined management is performed. Management information reading means for reading information, search means for searching for an authentication file from the predetermined management information read by the management information reading means, and authentication for authenticating with the authentication file searched by the search means Preferably, the data reading means accesses the data area of the external storage unit and reads predetermined actual data when the authentication is completed by the authentication means.

  In the electronic apparatus, the predetermined storage unit is a program data storage unit that stores program data that is read when a boot process is performed, and the data reading unit completes authentication by the authentication unit The data area of the external storage unit is accessed and the program data related to the boot process is read as the actual data, and the writing means is the program related to the boot process read by the data read means It is preferable to write data into the program data storage unit.

  In the electronic apparatus, the predetermined storage unit is a program data storage unit that stores program data that performs a predetermined function after the boot process is completed, and the data reading unit includes the authentication unit. When the authentication is completed by the means, the data area of the external storage unit is accessed and the program data is read as the actual data, and the writing means reads the program data read by the data reading means It is preferable to write in the program data storage unit.

  In the electronic device, it is preferable that the predetermined file system is a FAT (File Allocation Table) system.

  Further, in order to solve the above problems, the boot processing method according to the present invention includes a management information area and actual data in which management information is stored in accordance with a predetermined file system in response to power-on. And an external storage unit confirmation step for confirming that the external storage unit is attached to a mounting unit to which the external storage unit configured by the data area is stored, and the external storage unit confirmation step A data reading step for reading predetermined real data by accessing the data area of the external storage unit when it is confirmed that the external storage unit is mounted on the mounting unit, and read by the data reading step And a writing step of writing the actual data into a predetermined storage unit.

  In the boot processing method, when the external storage unit confirmation step confirms that the external storage unit is mounted on the mounting unit, the management information area of the external storage unit is accessed to obtain predetermined management information. Management information reading step, a search step of searching for an authentication file from the predetermined management information read by the management information reading step, and an authentication step of performing authentication by the authentication file searched by the search step Preferably, the data reading step accesses the data area of the external storage unit and reads predetermined actual data when authentication is completed by the authentication step.

  In addition, the boot processing program to be realized by the computer according to the present invention stores a management information area and actual data in which management information is stored in accordance with a predetermined file system when power is turned on. An external storage unit confirmation step for confirming that the external storage unit is attached to a mounting unit to which the external storage unit configured by the data area is attached, and the mounting unit by the external storage unit confirmation step A data reading step of accessing the data area of the external storage unit when the external storage unit is confirmed to be installed and reading predetermined actual data, and the actual read by the data reading step A program for realizing a writing process of writing data in a predetermined storage unit by a computer.

  In the boot processing program, when the external storage unit confirmation step confirms that the external storage unit is mounted on the mounting unit, the boot processing program accesses the management information area of the external storage unit to obtain a predetermined value. Authentication is performed by a management information reading process for reading management information, a search process for searching for an authentication file from the predetermined management information read by the management information reading process, and the authentication file searched by the search process An authentication step, wherein the data reading step accesses the data area of the external storage unit and reads predetermined actual data when authentication is completed by the authentication step.

  According to the present invention, data can be read from the external storage unit.

  Embodiments of the present invention will be described below. FIG. 1 is an external perspective view of a mobile phone device 1 which is an example of an electronic apparatus according to the present invention. In the following, the cellular phone device will be described. However, the present invention is not limited to this, and any device having an imaging function and a communication function may be used. For example, PHS (Personal Handy phone System), PDA ( (Personal Digital Assistant), portable navigation device, notebook personal computer or the like.

  The mobile phone device 1 includes an operation unit side body unit 2 and a display unit side body unit 3. The operation unit side body unit 2 includes an operation key group 11 and a microphone 12 to which a voice uttered by a user of the mobile phone device 1 is input on the surface unit 10. The operation key group 11 includes a function setting operation button 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input operation button 14 for inputting a telephone number and characters such as mail. And a determination operation button 15 for performing determination and scrolling in various operations.

  Further, the display unit side body unit 3 has a display 21 for displaying various information on the surface unit 20, an audio output unit 22 for outputting the voice of the other party on the call, and a CCD (Charge Coupled) for imaging the subject. (Device) An image pickup unit 23 constituted by a camera or the like and a speaker 24 for outputting music or the like to the outside are provided.

  Further, the upper end of the operation unit side body 2 and the lower end of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the cellular phone device 1 relatively rotates the operation unit side body unit 2 and the display unit side body unit 3 connected via the hinge mechanism 4, thereby The display unit side body 3 can be in a state of being open to each other (open state), or the operation unit side body 2 and the display unit side body 3 can be in a folded state (folded state).

  1 shows a form of a so-called foldable mobile phone device, but the form of the mobile phone device according to the present invention is not particularly limited to this, and the operation unit side body unit 2 and the display unit side body unit are not limited thereto. A slide type in which one housing is slid in one direction from a state in which the body portion 3 is overlaid, and an axis line along the overlapping direction of the operation portion side housing portion 2 and the display portion side housing portion 3 A rotary type (turn type) in which one casing is rotated around the center, and the operation section side casing section 2 and the display section side casing section 3 are arranged in one casing and have a connecting portion. There may be no type (straight type).

  FIG. 2 is a functional block diagram showing functions of the mobile phone device 1. As shown in FIG. 2, the mobile phone device 1 is supplied from a communication unit 60 that communicates with an external terminal, a processing unit 70 that performs predetermined processing, a rechargeable battery 80 having a predetermined capacity, and a rechargeable battery 80. A power supply circuit unit 90 that converts a power supply voltage to a predetermined voltage and supplies the converted voltage to the communication unit 60, the processing unit 70, and the like, a mounting unit 101 to which an external memory 100 (external storage unit) is mounted, It has.

  The communication unit 60 includes a main antenna 61 that communicates with an external device using a predetermined use frequency band, and a communication processing unit 62 that performs signal processing such as modulation processing or demodulation processing.

  The main antenna 61 communicates with an external device (base station) in a predetermined use frequency band (for example, 800 MHz). In the present embodiment, the predetermined use frequency band is 800 MHz, but other frequency bands may be used. Further, the main antenna 61 may have a so-called dual band compatible type that can support a second use frequency band (for example, 2 GHz) in addition to a predetermined use frequency band. You may be comprised by the type corresponding to multiple bands which can respond also to a use frequency band.

  The communication processing unit 62 demodulates the signal received by the main antenna 61, supplies the processed signal to the processing unit 70, and modulates the signal supplied from the processing unit 70, via the main antenna 61. To the external device (base station).

  The power supply circuit unit 90 transforms the power supply voltage supplied from the rechargeable battery 80 to a predetermined voltage value, and supplies the power supply voltage after the transformation to the communication unit 60 and the processing unit 70.

  The mounting unit 101 has a shape conforming to a predetermined standard, and enables mounting of the nonvolatile external memory 100 conforming to the predetermined standard. In addition, the processing unit 70 writes data to the external memory 100 attached to the attachment unit 101, and reads the written data.

  In the present embodiment, the external memory 100 is configured with a plurality of folders (directories), and the folder stored according to the type of stored data is described as being different. It is not done.

  The external memory 100 is described as being managed by, for example, a file allocation table (FAT) file system, but is not limited to this.

<About FAT file system>
Here, the FAT file system will be described. The file system is a mechanism for managing files on the external memory 100. The files and directories that are logically handled by the user are associated with the actual physical external memory 100 to configure the files and directories themselves. System. The FAT file system is managed by information called a directory entry and FAT (File Allocation Table).

  In the FAT file system, files are configured in units of clusters, but the physical positions on the external memory 100 of the clusters forming the same file are not necessarily continuous. FAT manages the order in which these clusters are connected to form one file. Each item of FAT corresponds to each cluster of the external memory 100 on a one-to-one basis. The start cluster of the file is recorded in a directory entry to be described later, and the next cluster is the content of the next entry of the FAT corresponding to the first cluster.

  A directory is a group name having a hierarchical structure for managing files. Information on files included in each directory is called a directory entry. The directory entry includes information such as the name, extension, attribute, data size, and file start cluster number (start cluster number) of the file and other directories. The top directory is called the root directory, and the subordinate directories are called subdirectories.

  The external memory 100 formatted by the FAT file system is divided into units called sectors, and data recorded on the external memory 100 is read and written in units of sectors. One sector is usually 512 bytes.

  A collection of powers of 2 sectors is called a cluster. The number of sectors that constitute one cluster differs depending on the external memory 100.

  The external memory 100 formatted by the FAT file system includes a master boot record (MBR), a partition table, a plurality of FAT areas, a root directory area, and a data area. The partition table has a boot sector at the head.

  The master boot record is the first sector of the external memory 100 and stores a boot loader and partition information for loading the operating system. The boot sector refers to the head sector of the corresponding partition, such as the number of sectors / clusters indicating how many sectors a cluster is composed of, the number of sectors constituting the FAT area, the number of root directory entries, etc. Information is being recorded.

  The FAT area is an area for recording a FAT item that is information indicating the location of the file body of the data recorded in the data area. The FAT area usually has two FAT areas, in which the same contents are recorded. Further, these two different FAT areas are continuously arranged on the external memory 100.

  The root directory area is an area for managing the location of files. In the root directory area, a root directory entry describing information on files and subdirectories existing in the root directory which is the highest directory is recorded.

  In the data area, a file entry (actual data) and a directory entry describing information on files and subdirectories existing under the subdirectory are recorded. The contents of the file recorded in the data area are associated with each other by FAT and directory entry.

  That is, when accessing data in the external memory 100, first, a part of the file recorded in the data area is read with reference to the start cluster number described in the root directory entry, and the next data is recorded with reference to the FAT. This is done by repeating the process of specifying the position in the data area and reading the data at that position to the end of the file.

  In this way, the cluster group constituting one file is connected as a chain by FAT. Such an operation of tracing the file portion based on the FAT is called a chain operation.

<Configuration and Operation of Processing Unit 70>
Next, the configuration and operation of the processing unit 70 will be described. The external memory 100 includes a management information area in which management information is stored and a data area in which actual data is stored in accordance with a predetermined file system (for example, the above-described FAT file system).

  The processing unit 70 is, for example, a main control unit (CPU). As shown in FIG. 3, the external memory 100 is installed in the mounting unit 101 in response to the main power being turned on (power is on). An external memory confirmation unit 200 (external storage unit confirmation unit) for confirming that the external memory 100 is attached, and the external memory 100 when the external memory confirmation unit 200 confirms that the external memory 100 is attached to the attachment unit 101 A management information reading unit 201 (management information reading means) that reads predetermined management information by accessing the management information area of the management information area, and an authentication file (password file) from the predetermined management information read by the management information reading unit 201 The search unit 202 (search unit) that searches, the authentication unit 203 (authentication unit) that performs authentication using the authentication file searched by the search unit 202, and the authentication unit 203 When the authentication is completed, the data reading unit 204 (data reading unit) that reads the predetermined real data by accessing the data area of the external memory 100, and the real data read by the data reading unit 204 is stored in the memory 206 (predetermined And a writing unit 205 for writing to the storage unit). Note that the memory 206 is composed of, for example, a NAND flash memory. The mobile phone device 1 also has a RAM 207 for temporarily writing data.

  The memory 206 is a program data storage unit that stores program data that is read when the boot process is performed. When the memory 206 has such a configuration, the data reading unit 204 and the writing unit 205 operate as follows.

  The data reading unit 204 accesses the data area of the external memory 100 when the authentication unit 203 completes authentication, and reads program data related to boot processing as actual data. Then, the writing unit 205 writes the program data related to the boot process read by the data reading unit 204 into the memory 206.

  The memory 206 is a program data storage unit that stores program data that performs a predetermined function after the boot process is completed. When the memory 206 has such a configuration, the data reading unit 204 and the writing unit 205 operate as follows.

  The data reading unit 204 accesses the data area of the external memory 100 when the authentication unit 203 completes authentication, and reads program data as actual data. Then, the writing unit 205 writes the program data read by the data reading unit 204 into the memory 206.

  Next, a method for downloading predetermined data from the external memory 100 in the boot processing steps (steps S1 to S3 shown below) by the mobile phone device 1 will be described with reference to the flowchart shown in FIG. In the following description, it is assumed that the reset is performed by turning on the main power by a predetermined operation by the user.

  When the main power is turned on by a predetermined operation by the user, a reset is performed, and various processing steps S1 for initialization are executed as a boot processing step, and then a startup mode determination step for determining a startup mode. S2 is executed. Then, a download step S3 in which predetermined data is downloaded from the external memory 100 is executed according to the determination result of the activation mode determination step S2. If the download process S3 is not executed according to the determination result of the activation mode determination process S2, the normal activation process S4 is performed, and the mobile phone device 1 is in an operable state (call waiting state). Become.

<Various processing steps S1 for initialization>
Next, various processing steps S1 for initialization will be described. In various processing steps S1 for initialization, as shown in FIG. 5, the RAM 207 is initialized (step S11), and the processing unit 70 (main control unit (CPU)) is initialized (step S12). Next, the interrupt handle is registered (step S13), the bus width and the like are set (step S14), and the controller of the memory 206 is initialized (step S15). Then, the external memory 100 is initialized (step S16).

  In various processing steps S1 for initialization, as described above, the RAM 207 is initialized, and the program can be operated for the first time by always transferring the boot program code. Therefore, after reset (CPU initial state) Then, the RAM 207 is initialized (step S11). The RAM 207 in this embodiment is an SDRAM (Synchronous DRAM), and performs a clock insertion operation so that the memory is not erased. In this way, initialization of the RAM 207 is executed first.

<Startup mode determination step S2>
Next, the activation mode determination step S2 will be described. As shown in FIG. 6, after initialization of the external memory 100 (step S16), the external memory confirmation unit 200 confirms whether or not the external memory 100 is attached to the attachment unit 101 (step S21). ). If it is confirmed that the external memory 100 is attached to the attachment unit 101, the process proceeds to step S22. If it is confirmed that the external memory 100 is not attached to the attachment unit 101, step S4 is performed. The process proceeds to (Step S41).

  When it is confirmed that the external memory 100 is attached to the attachment unit 101, the controller (management information reading unit 201, data reading unit 204) of the attachment unit 101 is initialized (step S22). Thereafter, the management information reading unit 201 reads the root directory file (step S23).

  The search unit 202 searches whether or not a predetermined authentication file name is included in the read root directory file. Specifically, it is confirmed whether or not the top file of the root directory file has a predetermined authentication file name (step S24). If it is not the predetermined authentication file name, the process proceeds to step S25, where the predetermined authentication file name is entered. If it is a name, the process proceeds to step S26.

  Further, it is determined whether or not the next file exists in the root directory file (step S25). If the next file exists, the process returns to step S24, and whether or not the file has a predetermined authentication file name. Is determined (step S24). If the next file does not exist, the process proceeds to step S4 (step S41).

  A predetermined authentication file is read from the external memory 100 (step S26), and the authentication unit 203 authenticates the authentication file (step S27). If the authentication is properly performed in step S28, the process proceeds to step S29. If the authentication is not properly performed, the process proceeds to step S4 (step S41).

  The data reading unit 204 searches for a file to be downloaded from the root directory of the external memory 100 (step S29), and checks whether there is a file to be downloaded (step S30). If a file to be downloaded exists, the process proceeds to step S3 (step S31). If a file to be downloaded does not exist, the process proceeds to step S4 (step S41).

<Download process S3>
Next, the download process S3 will be described. As shown in FIG. 7, the data reading unit 204 downloads a target file from the external memory 100. The downloaded data is written in a temporary storage memory such as the RAM 207 (step S31). Further, the data reading unit 204 reads the data written in the RAM 207 at a predetermined timing and writes it in the memory 206 (step S32). Further, it is determined whether or not all data has been read from the external memory 100 (step S33). If all the data has been read, the process proceeds to step S34, and if all the data has not been read, the process returns to step S31.

  When all the data is read from the external memory 100, a display indicating the end of download is displayed on the display 21 (step S34). And it waits for progress of predetermined time (for example, 2 minutes and 30 seconds) (step S35), and returns to step S1 (step S11). Note that, if the mobile phone device 1 is configured so that predetermined data can be written to the external memory 100 in a stage before the normal startup step S4, the external memory 100 indicates that it has already been downloaded. If the process of writing in the predetermined place is performed, the process of step S35 becomes unnecessary.

<Normal startup process S4>
Next, the normal startup process S4 will be described. As shown in FIG. 8, when it is confirmed that the external memory 100 is not attached to the attachment unit 101 in the step S21, or when it is determined that the next file does not exist in the step S25, If it is determined in step S28 that authentication is not properly performed, or if it is determined in step S30 that there is no file to be downloaded, the normal startup step S4 is executed. . That is, the C language standard library startup routine is activated (step S41), the OS is initialized (step S42), the root task is activated (step S43), and the subtask is activated (step S44).

  Thus, in the cellular phone device 1 according to the present invention, it is determined whether or not to write data to the memory 206 based on whether or not the authentication file read from the external memory 100 is authenticated. In addition, as in the prior art, in order to read data from the external memory 100, it is unnecessary to connect an external cable and input an arbitrary command.

  Further, in the cellular phone device 1 according to the present invention, a method of limiting the file system function and mounting it in the boot processing function (logic for searching a file in the root directory of the external memory 100 so as to operate even with a small code area, and In the so-called boot process (steps S1 to S3), a predetermined initialization process is performed, and the external memory 100 is mounted on the mounting unit 101. The authentication file is searched when the external memory 100 is mounted, the authentication file searched is authenticated, and predetermined data is read from the external memory 100 after the authentication is performed. Can be downloaded and written to the memory 206 from the external memory 100 as in the prior art. When downloading a constant data, the mobile phone device is not necessary to wait until 1 operable state (call waiting state), and there is no need to set a mode of blocking radio reception. Therefore, in the cellular phone device 1 according to the present invention, when downloading predetermined data from the external memory 100, it is possible to prevent contention processing with other functions (call waiting function) and download time compared to the prior art. Can be shortened and performed at high speed.

  In this embodiment, the FAT (File Allocation Table) system has been described as the predetermined file system. However, the present invention is not limited to the FAT file system, and other file systems may be used.

It is a perspective view which shows the external appearance of the mobile telephone apparatus which concerns on this invention. It is a block diagram which shows the function of the mobile telephone apparatus which concerns on this invention. It is a figure which shows the structure of the process part with which the mobile telephone apparatus which concerns on this invention is equipped. It is a figure where it uses for description about the process of the boot process which concerns on this invention. It is a flowchart with which it uses for description about the various process steps for initialization. It is a flowchart with which it uses for description about a starting mode determination process. It is a flowchart with which it uses for description about a download process. It is a flowchart with which it uses for description about a normal starting process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone apparatus 70 Processing part 100 External memory 101 Wearing part 200 External memory confirmation part (External storage part confirmation means)
201 Management information reading part (Management information reading means)
202 Search unit (search means)
203 Authentication part (authentication means)
204 Data reading part (data reading means)
205 Writing unit 206 Memory (predetermined storage unit)
207 RAM

Claims (9)

A mounting unit to which an external storage unit configured by a management information area for storing management information and a data area for storing actual data in accordance with a predetermined file system is mounted, and a boot for performing a predetermined boot process In an electronic device having a processing unit,
The boot processing unit
An external storage unit confirmation means for confirming that the external storage unit is mounted on the mounting unit in response to power-on.
A data reading unit that accesses the data area of the external storage unit and reads predetermined actual data when the external storage unit confirmation unit confirms that the external storage unit is mounted on the mounting unit;
An electronic apparatus comprising: writing means for writing the actual data read by the data reading means into a predetermined storage unit. Management information reading means for accessing the management information area of the external storage unit and reading predetermined management information when the external storage unit confirmation unit confirms that the external storage unit is mounted on the mounting unit. When,
Search means for searching for an authentication file from the predetermined management information read by the management information reading means;
Authentication means for performing authentication with the authentication file searched by the search means,
2. The electronic apparatus according to claim 1, wherein the data reading unit accesses the data area of the external storage unit and reads predetermined actual data when authentication is completed by the authentication unit. The predetermined storage unit is a program data storage unit that stores program data that is read when a boot process is performed,
The data reading means accesses the data area of the external storage unit when authentication is completed by the authentication means, reads program data related to the boot process as the actual data,
3. The electronic apparatus according to claim 2, wherein the writing unit writes the program data related to the boot process read by the data reading unit into the program data storage unit. The predetermined storage unit is a program data storage unit that stores program data that performs a predetermined function after the boot process is completed,
The data reading means accesses the data area of the external storage unit when authentication is completed by the authentication means, reads the program data as the actual data,
3. The electronic apparatus according to claim 2, wherein the writing unit writes the program data read by the data reading unit into the program data storage unit.   The electronic device according to claim 1, wherein the predetermined file system is a FAT (File Allocation Table) system. When the power is turned on, an external storage unit configured with a management information area for storing management information and a data area for storing actual data in accordance with a predetermined file system is mounted. An external storage unit confirmation step for confirming that the external storage unit is mounted on the mounting unit;
A data reading step of accessing the data area of the external storage unit and reading predetermined real data when the external storage unit confirmation step confirms that the external storage unit is attached to the mounting unit;
A boot processing method comprising: a writing step of writing the actual data read in the data reading step into a predetermined storage unit. Management information reading step for accessing the management information area of the external storage unit and reading predetermined management information when it is confirmed that the external storage unit is mounted on the mounting unit by the external storage unit checking step When,
A search step of searching for an authentication file from the predetermined management information read by the management information reading step;
An authentication step of performing authentication with the authentication file searched in the search step,
7. The boot processing method according to claim 6, wherein the data reading step accesses the data area of the external storage unit and reads predetermined actual data when authentication is completed by the authentication step. When the power is turned on, an external storage unit configured with a management information area for storing management information and a data area for storing actual data in accordance with a predetermined file system is mounted. An external storage unit confirmation step for confirming that the external storage unit is mounted on the mounting unit;
A data reading step of accessing the data area of the external storage unit and reading predetermined real data when the external storage unit confirmation step confirms that the external storage unit is attached to the mounting unit;
A boot processing program for realizing, by a computer, a writing step of writing the actual data read in the data reading step into a predetermined storage unit. Management information reading step for accessing the management information area of the external storage unit and reading predetermined management information when it is confirmed that the external storage unit is mounted on the mounting unit by the external storage unit checking step When,
A search step of searching for an authentication file from the predetermined management information read by the management information reading step;
An authentication step of performing authentication with the authentication file searched in the search step,
9. The boot processing program according to claim 8, wherein the data reading step accesses the data area of the external storage unit and reads predetermined actual data when authentication is completed by the authentication step.

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