JP2003308179A - Back-up system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To speedily and easily perform a backup operation of data and to prevent backed-up data from being damaged by a computer virus or the like. <P>SOLUTION: A back-up system has a control portion 3 which is connected to a cable 23 connected to a mother board, a cable 24 connected to a hard disk drive, and a cable 5 connected to a hard disk drive for back-up, and the control portion 3 has a semiconductor switch 34 for turning off a connection between the mother board and the hard disk drive for back-up ordinarily to switch the connection of the hard disk drive between the mother board and the hard disk drive for back-up, and controls a data back-up/restore operation and the switching operation of the switch 34. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup device for backing up a hard disk drive device.

[0002]

2. Description of the Related Art Conventionally, a personal computer has been constructed by connecting a hard disk drive device or the like via a bus line to a mother board loaded with a central processing unit (CPU). The hard disk drive device stores an operation system for operating the central processing unit according to various purposes, various programs, various data, and the like.

In order to protect the data and programs stored in this hard disk drive device from loss due to crashes, computer viruses, etc., it is common practice to keep a backup. For this backup, it is common to manually copy the information on the hard disk drive device to another recording medium.
A system that automatically backs up to an added hard disk drive has also been proposed.

As such a backup system, there are the following systems.

[0005]

[Non-Patent Document 1] TTF's Home Page
Enjoy your own computer-URL http://www.jttk.zaq.ne.jp/ttf/raid/raid_1.
htm.

[0006]

However, as a method of making a backup in another recording medium, a so-called file copy method is adopted, and data is logically collected and copied (for each file). Therefore, the copy time becomes long. In recent years, the number of hard disk drive devices with large capacities has increased, and the above-mentioned file copying method requires a longer time, which is not preferable.

In a computer used by an unspecified number of people, when a problem occurs in the setting of the computer, it is often impossible to determine who and what operation caused the problem. In particular, if the person who operates the computer does not have sufficient knowledge of the computer, data may be destroyed due to the operator's inaction. Furthermore, in recent years, operating systems and various application programs have been increased in capacity, and software configurations have become extremely complicated. For this reason,
Damaged, such as when a part of the software was destroyed due to a computer virus or inoperability of the operator, or when the installation of new software failed and some of the previous settings were rewritten. It is often difficult in practice to detect and repair a broken portion or a rewritten portion even if the portion is a small portion.

In the above cases, restoring the backed up data is the most effective coping method. However, as described above, a recent hard disk drive device having a large capacity has a drawback that it takes time to restore.

On the other hand, in a system that backs up to a hard disk drive device, the time for backing up and restoring is shorter than when recording to another type of recording medium because the recording medium is of the same type. However, in the conventional backup system as described in Non-Patent Document 1, since the backup hard disk drive device is controlled by the computer body, the backup data may be damaged by the operation from the computer side. Remain. For example, the backup data may be damaged by a computer virus, or the data may be similarly damaged by the inaction of the operator.

It is an object of the present invention to provide a backup device that makes a backup operation of data quick and easy and does not damage the backup data due to a computer virus or the like.

[0011]

The above objects are achieved by the present invention described below. (1) A state of being connected to a first storage device, a second storage device, and a central control device that controls the second storage device, and disabling communication between the central processing device and the first storage device. While maintaining the above, the communication between the first storage device and the second storage device is disabled, and the central processing unit and the second storage device are connected in a communicable state and a central processing unit. And a second storage device, and a switching means for switching the communication between the first storage device and the second storage device to a copyable state connected to enable communication between the first storage device and the second storage device. ,
A switching control unit that controls switching between a communicable state and a copyable state, and a copy control unit that controls a copy operation from one of the second storage device and the first storage device to the other in the copyable state. Backup device with and.

(2) First connected to the first storage device
A second connection unit to which the second storage device is connected, and a third connection unit to which the central processing unit is connected,
The first storage device, the second storage device, and the central processing unit are connected to the first storage device while maintaining a state in which communication between the central processing unit and the first storage device is disabled. Communication between the central processing unit and the second storage unit is disabled, and the central processing unit and the second storage unit are connected to each other so that the central processing unit and the second storage unit can communicate with each other, and the communication between the central processing unit and the second storage unit. And a switching means for switching to a copyable state in which the first storage device and the second storage device are connected so that they can communicate with each other. And a copy control means for controlling a copy operation from one of the second storage device and the first storage device to the other in the copy enabled state.

(3) The backup device according to (1) or (2) above, wherein the switching means is a semiconductor switch.

(4) The backup device according to any one of (1) to (3) above, wherein the first storage device is a hard disk drive device.

(5) The backup device according to any one of (1) to (4) above, wherein the second storage device is a hard disk drive device.

(6) A switching operation means for selecting whether or not to perform a copy operation of recorded information is provided, and the switching control means controls the switching of the switching means in accordance with the selection content of the switching operation means. The backup device according to any one of (1) to (5).

(7) Any one of the above (1) to (6)
Has a housing that stores the backup device of
A backup device having an attachment part that is detachably fixed to a storage part in the central processing unit.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of a personal computer 2 to which the backup device 1 of the present invention is connected and the configuration of the backup device 1.

The personal computer 2 includes a mother board 21 to which a central processing unit (CPU: Central Processing Unit) is mounted, and a hard disk drive device 22 which is a second storage device. The central processing unit writes data in the hard disk drive device 22 or reads data from the hard disk drive device 22. That is, the hard disk drive device 22 functions as a read / write means.

The hard disk drive device 22 and the mother board 2 are connected to the input / output port 211 of the mother board 21.
A flat cable 23 of a bus line forming a part of a connection circuit with the central processing unit 1 is connected. Further, the input / output port 221 of the hard disk drive device 22 is also connected with the flat cable 24 of the bus line which forms a part of the connection circuit with the central processing unit of the motherboard 21. The other end of each flat cable 23, 24 is
Input / output ports 31, 32 of the backup device 1 of the present invention
Respectively connected to. This input / output port 31 is
The input / output port 32 serves as a third connecting portion connected to the motherboard 21, and the input / output port 32 serves as a second connecting portion connected to the hard disk drive device 22.

The backup device 1 includes a control unit 3 and a first
The hard disk drive device 4 for backup, which is a storage device, is connected to the controller 3 and the hard disk drive device 4 for backup by a flat cable 5. One end of the flat cable 5 is connected to the input / output port 33 of the control unit 3, which is the first connection unit, and the other end is connected to the input / output port 41 of the backup hard disk drive device 4.

As shown in FIG. 2, the control unit 3 is
A switching unit 34 and a control unit 35 are provided.
The control unit 35 includes a central processing unit 351, a secondary processing unit 352, and a memory 353. The central processing unit 351 has a (CPU: Central Processing Uni
t), supplying an instruction signal (command) to the switching means 34 and the secondary processing means 352. The secondary processing means 352 performs mirror copy of data between the hard disk drive device 22 and the backup hard disk drive device 4 based on the supply of the instruction signal from the central processing means 351. The memory 353 is a memory for temporarily storing the data read from the copy source when copying the data.

The switching means 34 is always maintained in a state in which communication between the motherboard 21 and the backup hard disk drive device 4 is disabled. Then, the switching unit 34 disables the communication between the motherboard 21 and the hard disk drive device 22 according to an instruction from the central processing unit 351, and the copyable state in which the communication between the hard disk drive device 22 and the backup hard disk drive device 4 is possible. And the hard disk drive device 2
2 has a function of switching the connection circuit to a communicable state in which communication between the motherboard 2 and the hard disk drive device 22 is disabled and communication between the backup hard disk drive device 4 is disabled. here,
Communication means transmission and reception of a signal, including a case where an electrically energized state is electrically maintained. A state in which no signal is communicated is a communication disabled state, and a state in which a signal is communicated is a communication enabled state. Therefore, the state in which the circuit is electrically disconnected is also included in the incommunicable state.

Therefore, in the copy ready state, the signal from the motherboard 21 is transmitted to the hard disk drive device 22.
Hard drive device 22
The signal from is also not transmitted to the motherboard 21. Furthermore, in any case, the signal from the motherboard 21 is not transmitted to the backup hard disk drive device 4.

In the embodiment of the present invention, a semiconductor switch is used as the switching means having the above operation. That is, it is a switch for switching the communication circuit by the logic circuit. Further, it is a switch in which the delay time between the input and the output is sufficiently short according to the operating speed of the personal computer so as not to affect the operating speed. From the central processing means 351, this semiconductor switch is
Upon receiving the supply of the signal instructing the switching, the circuit is switched between the communicable state and the copyable state.

The secondary processing means 352 is the central processing means 35.
It operates based on the copy instruction signal from 1. There are two types of copying: copying data from the hard disk drive device 22 to the backup hard disk drive device 4 (backup) and conversely copying data from the backup hard disk drive device 4 to the hard disk drive device 22 (restore). Is. In this embodiment, for example, a PLD (Programmable Logic Array) is used as the secondary processing unit 352. P has a circuit configured in advance exclusively for the copy operation.
By using the LD, the operation speed is increased and the copy processing time of the entire backup device 1 can be shortened. Other control circuits may be used for the secondary processing means 352.

The drive power source of the backup device 1 is constructed so as to be obtained from the personal computer 2 connected thereto. Therefore, when the main power of the personal computer 2 is turned on, the drive power of the backup device 1 is turned on at the same time.

Further, the backup device 1 includes a backup switch for selecting data copy from the hard disk drive device 22 to the backup hard disk drive device 4 and a restore of data from the backup hard disk drive device 4 to the hard disk drive device 22. A restore switch for selection is provided, and one copy operation of backup or restore is selected by turning on the power of the personal computer 2 while pressing one of these switches.

Further, a display unit is connected to the central processing means 351. This display unit has an operation state display unit that indicates the progress of copying and an end display unit that displays the end of copying. These display units are composed of, for example, a liquid crystal screen or light emitting diodes. Further, the switching means 354 is connected to the central processing means 351, and based on the state of the switching operation means 354, the central processing means 351.
Controls the switching of the switching means to two communicable states (communicable state and copyable state). In addition, the switching operation means 354, as will be described later, the backup switch 11
And a restore switch 12, and when one of the backup switch 11 and the restore switch 12 is on, it is in a copyable state, and when both are off, it is in a communicable state, and the switching means 34 is provided. Maintained.

The operation of the control unit 3 of the backup device 1 of the present invention will be described below with reference to the flowcharts shown in FIGS. 3 and 4. In the following description, the copy source hard disk drive device will be referred to as an original hard disk drive (original HDD), and the copy destination hard disk drive device will be referred to as a clone hard disk drive (clone HDD), for easy understanding of terms. Therefore, in the case of the backup operation, the hard disk drive device 22 becomes the original hard disk and the backup hard disk drive device 4 becomes the clone hard disk. In the case of a restore operation, the hard disk drive device 22 becomes the clone hard disk and the backup hard disk drive device 4 becomes the original hard disk.

When the power of the personal computer 2 is turned on, the drive power of the backup device 1 is turned on and the operation of the central processing means 351 is started. Central processing means 351
Determines whether the backup switch or the restore switch is turned on (step S101). That is,
It is determined whether the switching operation means 354 has been switched to the copy enabled position. If both switches are not turned on, the drive power source of the backup hard disk drive device 4 is not turned on (step S10).
3), the operation program ends.

When the backup switch or the restore switch is turned on (the switching operation means 354 is in a switch state in which copying is possible), the drive power source of the backup hard disk drive device 4 is turned on and the backup switch is turned on. If it is, the backup operation is performed, and if the restore switch is turned on, it is determined that the restore operation is performed (step S105). In the following description, the case where the backup switch is turned on will be described.

Next, a switching signal is supplied to the switching means 34 (step S107), and the switching means 34 is switched to the copy ready state. As a result, the signal from the motherboard 21 does not reach the hard disk drive device 22 (original hard disk), and the hard disk drive device 22 and the backup hard disk drive device 4 (clone hard disk) are in a communicable state. These steps S101 to S10
The switching control means is constituted by 7.

Then, a copy instruction signal is supplied to the secondary processing means 352 (step S109). Secondary processing means 3
While the copy operation is being performed at 25, the mother board 21 sends a signal to the hard disk drive device 22 to confirm the connection.
Since the communication circuit is disconnected by 4, the signal does not reach the hard disk drive device 22, and the response signal from the hard disk drive device 22 also does not reach the motherboard 21. Therefore, on the personal computer 2 side, the main power supply is turned on, but the operation system is maintained in a state where it does not start up.

As will be described later, when the copy is completed, an end signal is supplied from the secondary processing means 352, so it is judged whether or not the copy end signal is received (step S11).
1). If not received, this step is repeated, and if received, a copy end display is displayed on the display unit (step S113). Then, by turning off the power of the personal computer 2, the power of the backup device 1 is turned off, and all the operations are completed.

Next, the operation of the secondary processing means 352 which is the copy control means will be described with reference to FIG. It is determined whether the copy instruction signal is supplied from the central processing means 351 (step S201). The instruction signal also includes information on whether the copy operation is a backup operation or a restore operation. A confirmation signal is supplied to the clone hard disk, and a signal for inquiring the specification information of the device (device) such as the capacity of the hard disk drive device, the serial number, the number of tracks, and the speed of the interface is supplied (step S203). Then, the specification information is received by the response signal from the clone hard disk (step S205). The same signal is supplied to the original hard disk (step S207),
Similarly, the specification information is received (step S209).

Based on the information received in steps S205 and S209, the transfer rate of each hard disk is determined (step S211). From the received specification information of the hard disk, the number of read times A required to read all the data from the original hard disk is calculated (step S213).

This is 1 from the total capacity of the hard disk.
It is calculated by dividing the amount of data read by one read operation. The amount of data that can be read by one read is the memory 3
It is determined by the capacity of 53 and the data transfer rate of the hard disk drive. With this amount of data as a unit amount of data, the operation from reading (reading) from the original hard disk to writing (writing) to the clone hard disk is counted as one count. By performing this read / write operation A times, the operation of copying the data of the entire area of the original hard disk to the clone hard disk is completed.
Before starting copying, the counter value is initialized (step S215).

Here, the copy method is mirror copy. That is, by using an address that defines a physical position on the recording medium of the hard disk drive device, the recorded data is read from the original recording medium and the read data is written to the clone recording medium. is there. Data transfer is performed based on the interface transmission method, but the method is not particularly limited. For example, IDE (Integrated Device Electronic)
s) method, SCSI (Small Computer System Interfac
e) Method and other methods may be used.

In the mirror copy, the data is sequentially read from the end of the recording medium based on the physically defined address information, so that the seek time of the head of the hard disk drive device can be shortened and the data can be read most efficiently. And, it is a copy method that can write data,
The copy time can be shortened.

Next, from the original hard disk,
Data of unit data amount is read (step S21
7). Address data indicating a physical location where the data is recorded is added to the read data and stored in the memory 353 (step S219). Memory 3
Reference numeral 53 denotes a dual port memory, which has two ports. The first port is used for input of read data, and the second port is used for output of stored data. By using such a dual port memory, it is possible to efficiently input and output data to the memory and shorten the copy time. When the memory 353 is filled with data, the reading is stopped and the data read from the memory 353 is
It is pulled out from the second dual port and written to the clone hard disk (step S221). In the clone hard disk, the data writing position is determined based on the address data added to the data.

Next, it is judged whether or not the memory 353 is empty (step S223). If the memory 353 is empty, it means that the copying of the data of one unit data amount is completed, so the counter value N is incremented. (Step S22
5), it is determined whether or not the counter value N has reached the number of read times A necessary for reading all data (step S227). If not, step S2
17 to S227 are repeated. When A = N,
Since it means that the entire area of the original hard disk has been copied, the copy operation is ended and a copy end signal is supplied to the central processing means 351. When restoring, the original hard disk becomes the backup hard disk drive device 4 and the clone hard disk becomes the hard disk drive device 22, and the other operations are the same.

In addition to the configuration described above, the clone hard disk drive device may be a recording device using another recording medium. For example, the MO that contains the MO
It is also possible to use an optical storage such as a drive device or a DVD drive device in which a DVD is stored. Further, any recording device may be used as long as it has a capacity larger than that of the original hard disk drive. Since the recording device on the clone side is not directly accessed by the central processing unit on the personal computer side, any recording method may be used, and if it is readable when restored to the original hard disk drive, the central processing unit It may be recorded by a recording method that cannot be read from the.

In the configuration described above, the memory 253
Can be FIFO memory (First In First Out memory). This memory is stored and in order,
Since the memory is configured so that the previously stored data can be taken out, the data can be taken out at any time, and the copy operation can be further shortened.

The apparatus constructed as described above has a housing 10
It is stored in. The housing 10 has a backup switch 11 and a restore switch 12 on the front part. Further, a key for making the operation of the switches 11 and 12 effective is provided, and a key hole of the key 13 is made to face the front part. An operation status display unit 16 and an end display unit 17 are arranged on the front surface.

The housing 10 as described above is housed in the housing portion 61 provided in the case 6 of the personal computer 2. The storage section 61 is a storage section for storing an optical storage such as a CD-ROM drive device. The housing 10 is preconfigured to have the same size as the optical storage, and has a screw hole 1 as a mounting portion provided on the side surface.
Nos. 4 and 15 have the same standard as the optical storage. The device 1 of the present invention is housed in the housing 61 together with the housing 10, and is screwed into the screw holes 14 and 15 to form the case 6
Fixed to.

The device 1 of the present invention is configured as described above, so that the device 1 is arranged side by side with the FD drive device 62, and is stored with the operator facing the front part where the operation switch is arranged. Become. As described above, in the case 6, the operation switch of the housing 10 is arranged on the operation side surface, whereby the backup and restore operations are further facilitated, and as a result, the occurrence of erroneous operations is suppressed.

During normal use, lock with the key 13,
The switches 11 and 12 are disabled. As a result, the trouble of restoring the data to the original hard disk drive device due to an erroneous operation or the like is suppressed.

When backing up or restoring, the key 13 is released, and one of the backup switch 11 and the restore switch 12 is turned on, and the main power switch 63 of the personal computer is turned on. The main power supply of the backup device of the present invention is connected to the main power supply circuit of the personal computer 2 and is supplied with power. By such a power-on operation, as shown in FIG.
The flowchart shown in is started.

As an example of the configuration of the switching means 34, it is possible to provide a circuit which enables communication between the motherboard 21 (central processing unit) and the clone hard disk 4 and shuts off communication between the motherboard 21 and the original hard disk 22. it can. In this case, the motherboard 21
The clone hard disk 4 can be directly accessed, and the system can be configured to be activated by using the software recorded in the clone hard disk 4 (that is, by using the backed up data). .

Next, another embodiment of the backup device of the present invention will be described with reference to FIGS. Figure 6
FIG. 7 is a block diagram showing a configuration in which the control unit 3 of the backup device is arranged on the motherboard 21. FIG.
3 is a block diagram showing the internal structure of the motherboard 21. FIG.

A CPU 20 as a central processing unit is arranged on the mother board 21, and an internal bus 213 connecting the CPU 20 and a hard disk drive device 22 which is a second storage device has an internal bus 213 for controlling the control unit 3 of the backup device.
Is provided. That is, the CPU 20 and the hard disk drive device 22 are connected via the control unit 3. The internal bus 213 is connected to the input / output port 211 to which the hard disk drive device 22 is connected. The control unit 3 is further connected to the input / output port 212 via the internal bus 214, and the hard disk drive device 4 as the first storage device is connected to the input / output port 212.

As shown in FIG. 7, in the control section 3, the switching means 34 is directly connected to the internal bus 213 and the internal bus 214. The other configurations are the same as those described with reference to FIGS. 1 and 2, and thus the description thereof will be omitted. With such a configuration, it is possible to configure a motherboard having a backup function, and it is not necessary to separately provide a space for installing the backup device.

In this configuration, for example, instead of the switching operation means 354, basic software (for example, BIOS [Basic
Input / Output System]), the switching means 34 may be switched. In this case, the switching operation may be instructed on the operation screen of the personal computer at startup.

[0055]

According to the invention described in claim 1, since the first storage device is always in the state of communication interruption from the central processing unit by the switching means, the stored data is completely protected from the computer virus. Can be isolated.

According to the second aspect of the invention, since the first storage device is always in the state of communication interruption from the central processing unit by the switching means, the stored data is completely isolated from the computer virus. be able to. Further, by exchanging the first storage device connected to the first connection unit, it is possible to arbitrarily exchange the first storage device with a first storage device having a storage capacity according to the storage capacity of the second storage device. It will be possible.

According to the invention of claim 3, claim 1
In addition to the effect of the invention described in 1 and 2, by using the semiconductor switch as the switching means, the delay time between the input to the switching means and the output based on the input is reduced, and the central processing unit and the second processing unit are provided. The backup device of the present invention can be connected to a system that performs higher-speed communication without affecting the communication with the storage device.

According to the fourth aspect of the present invention, the backup operation and the restore operation time can be shortened in addition to the effect of the above-mentioned invention by adopting a configuration in which a backup is made in a hard disk drive device having a high access speed. Especially useful. Also, compared to other storage devices,
Since it has a large storage capacity and is compact, it can be used as a backup for a storage device having a larger capacity, and the entire device can be downsized.

According to the invention described in claim 5, in addition to the effect of the invention described above, the backup and restore can be shortened even if the amount of data to be backed up is increased by adopting the constitution of taking a backup of the hard disk drive device. Can be completed in time.

According to the invention described in claim 6, according to the selected position of the switching operation means switched by the external operation,
Since the switching means controls the switching, the backup data can be more reliably isolated from the central processing unit, and the data can be surely secured from a computer virus or the like.

According to the seventh aspect of the present invention, the parts can be stored in the housing, and can be stored in the case in which the central processing unit is stored.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a personal computer to which a backup device of the present invention is connected and the configuration of the backup device.

FIG. 2 is a block diagram showing a configuration of a control unit.

FIG. 3 is a flowchart showing an operation of a central processing means.

FIG. 4 is a flowchart showing the operation of the PLD.

FIG. 5 is a perspective view showing a state in which the backup device of the present invention is stored in a personal computer.

FIG. 6 is a block diagram showing a configuration of a personal computer showing another embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a control unit in another embodiment.

[Explanation of symbols]

1 Backup device 10 housing 2 personal computer 21 Motherboard 22 Hard disk drive 23 flat cable 24 flat cable 3 control unit 4 Hard disk drive device for backup 5 flat cable 6 cases

Continued front page    (72) Inventor Kazuhiro Fujita             6 Shirakawa-cho 520 6 Hikone City Shiga Prefecture F term (reference) 5B065 BA01 EA33                 5B082 DE07

Claims (7)

[Claims] 1. A first storage device and a second storage device,
Connected to a central controller for controlling the second storage device,
While maintaining the state in which the communication between the central processing unit and the first storage device is disabled, the communication between the first storage device and the second storage device is cut off, and the central processing unit and the second storage device are To a state in which the communication between the central processing unit and the second storage device is disabled, and the state in which the communication between the first storage device and the second storage device is possible is established. Switching means for switching to the copy enabled state, switching control means for switching the switching means between the communication enabled state and the copy enabled state, and the second storage device and the first storage in the copy enabled state. A backup device including a copy control unit that controls a copy operation from one device to the other device. 2. A first connection unit connected to the first storage device, a second connection unit connected to the second storage device, and a third connection unit connected to the central processing unit. And the first storage device, the second storage device, and the central processing unit are connected, while maintaining a state in which communication between the central processing unit and the first storage device is disabled, Communication between the first storage device and the second storage device is cut off, and the central processing unit and the second storage device are connected in a communicable state in which communication is possible between the central processing unit and the second storage device. Switching means for making communication with the device incommunicable and switching to a copyable state connected to a state in which communication between the first storage device and the second storage device is possible; Switching control means for controlling switching to the copy-enabled state, and the second description in the copy-enabled state. A backup device comprising a storage device and a first storage device, and a copy control means for controlling a copy operation from one to the other. 3. The backup device according to claim 1, wherein the switching means is a semiconductor switch. 4. The backup device according to claim 1, wherein the first storage device is a hard disk drive device. 5. The backup device according to claim 1, wherein the second storage device is a hard disk drive device. 6. A switching operation means for selecting whether or not to perform a copy operation of recorded information, wherein the switching control means controls switching of the switching means in accordance with the selection content of the switching operation means. The backup device according to any one of 1 to 5. 7. A housing having the backup device according to claim 1 stored therein, the housing being detachable from a storage portion in a case in which the central processing unit is stored. A backup device having a mounting portion fixed to the.