JP2004102665A - Storage device protection system and information equipment with the system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the release of a monitoring state by a removable monitoring device more complicated, and to enable only an operator to release the monitoring state with ease. <P>SOLUTION: A monitor circuit substrate 21 having a monitor circuit which monitors the attachment and detachment of a HDD 20 is formed with a key slot 24. When a monitor-releasing key 25 is inserted into the key slot 24, the monitoring state of the HDD 20 is released, and the locking state by a lock mechanism 27 of the opening/closing part of a hard BOX case 23 is also released; and then the attachment and detachment of the HDD 20 becomes possible. When the opening/closing part of the hard BOX case 23 is opened without inserting of the monitor-releasing key 25 into the key slot 24, a BOX opening/closing sensor 22 outputs a detection signal, and data in the HDD 20 are processed by controlling the monitor circuit, to make the HDD 20 impossible to be restored. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a storage device protection system for preventing a mass storage device such as a hard disk drive from being illegally removed, and an information device having the system.
[0002]
[Prior art]
In document management in an information device such as a copying machine, security can be managed by encrypting data. Further, in a case where data is obtained by removing the storage device, by adding a machine code to the encrypted data and by associating the machine code with the encryption / decryption device, the storage device can be removed. It is difficult to acquire data by attaching it to an information device.
[0003]
Patent Document 1 discloses an operation of protecting internal data in a device that monitors unauthorized attachment / detachment of a storage device such as an HDD when the attachment / detachment is detected.
[0004]
[Patent Document 1]
JP-A-11-175406 (pages 4 to 10)
[0005]
[Problems to be solved by the invention]
However, when performing maintenance or the like of the storage device or the monitoring device, it is necessary to cancel the monitoring operation by the monitoring device. However, providing a mechanism capable of easily canceling the monitoring operation has no meaning in security management. .
[0006]
Also, when the main power supply of the information device main body equipped with the storage device is cut off or in the energy saving mode, the power supply to the monitoring device must be considered.
[0007]
The present invention has a storage device protection system that solves such a problem, makes the method of releasing a monitoring state by a detachment monitoring device more complicated, and enables only an operator to easily release the monitoring state, and this system. The purpose is to provide information equipment.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 stores a storage device that stores input information and outputs desired information from the stored information, monitors removal of the storage device, and monitors the storage device. In a storage device protection system having a detachment monitoring device that processes data in the storage device when it is determined that there is a risk that the device may be removed improperly, the detachment monitoring device may be provided with a key slot and a key externally. Control means is provided for canceling the monitoring state by the detachment monitoring device when inserted into the slot. With this configuration, in the storage device protection system, the unauthorized attachment / detachment monitoring can be canceled by inserting a key into the key slot, so that the operation for canceling the unauthorized attachment / detachment monitoring is simplified and maintenance work is performed. This makes it easier for the user to attach and detach the storage device. In addition, since there is no key, the monitoring of unauthorized attachment / detachment is not canceled, so that high-quality security management becomes possible.
[0009]
The invention according to claim 2 is characterized in that, in the invention according to claim 1, a device-specific data is added to a key, and the detachment monitoring device is provided with means for reading the device-specific data. With this configuration, by adding device-specific data to a key, in an information device having a storage device protection system, a key corresponding to a predetermined information device does not correspond to another information device, Because of the compatibility, forgery of the key can be made difficult.
[0010]
According to a third aspect of the present invention, in the second aspect, a rewritable ID chip is provided for a key. With such a configuration, the key can be provided with electrically identifiable data in order to add a rewritable ID chip to the key so that the key can be provided with an electrically identifiable data. Therefore, it is possible to prevent forgery and forgery.
[0011]
According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the detachment monitoring device and the storage device are housed in a metal outer housing. With such a configuration, extraneous radiation of unnecessary electromagnetic waves can be suppressed.
[0012]
According to a fifth aspect of the present invention, in accordance with the first, second or third aspect of the present invention, there is provided an outer housing for accommodating the detachment monitoring device and the storage device, and a lock mechanism for locking an opening / closing portion of the outer housing. The locked state is released when a key is inserted into the key slot from outside. With such a configuration, it is possible to save a worker from performing the work of unlocking.
[0013]
According to a sixth aspect of the present invention, in the first, second or third aspect of the present invention, an outer housing for housing the detachment monitoring device and the storage device, and an opening and closing of the outer housing provided inside the outer housing. And a lock mechanism for locking the unit and electrically releasing the lock. With this configuration, it is difficult to open the opening / closing unit from outside, and it is difficult to remove the storage device illegally.
[0014]
According to a seventh aspect of the present invention, there is provided the storage device protection system according to any one of the first to sixth aspects, and a main power supply unit that supplies power to each unit in the storage device protection system and the information device main body. In the information device, the storage device protection system is provided with a secondary battery that supplies power to the detachment monitoring device, and when the power supply from the main power supply unit to the storage device protection system is stopped, the secondary battery Supplies power to the desorption monitoring device. With this configuration, it is possible to continuously supply power to the desorption monitoring device.
[0015]
The invention according to claim 8 is the invention according to claim 7, further comprising an energy saving mode for supplying power to a part of each unit in the information device main body. Power is supplied to the desorption monitoring device. With this configuration, the power of the information device in the energy saving mode can be reduced by supplying the power of the detachment monitoring device from the secondary battery in the energy saving mode of the information device.
[0016]
According to a ninth aspect of the present invention, in the invention of the seventh or eighth aspect, power is supplied from the secondary battery to the detachment monitoring device in an off mode in which a main switch of the information device is off. . With this configuration, when the main switch is in the OFF state, the storage device protection system can operate without shutting off the power of the detachment monitoring device.
[0017]
According to a tenth aspect of the present invention, in the invention according to the seventh, eighth or ninth aspect, the desorption monitoring device turns off a power supply for the desorption monitoring device when the remaining capacity of the secondary battery becomes a predetermined value or less. It is characterized in that a command to turn on is output and switching is performed so that power is supplied from the main power supply unit to the detachment monitoring device. With this configuration, the remaining capacity of the secondary battery is monitored, and when the remaining capacity is low, power is supplied from the main power supply. When the power cord is plugged in, the power is supplied to the detachment monitoring device. Supplied.
[0018]
According to an eleventh aspect of the present invention, in the invention according to the tenth aspect, the power supplied from the secondary battery to the main power supply unit to the detachment monitoring device is switched when the remaining capacity of the secondary battery becomes a predetermined value or less. The secondary battery is charged when the battery is fully charged, and when the battery is fully charged, the power supplied from the main power supply unit to the secondary battery to the detachment monitoring device is switched. With this configuration, it is possible to stably operate the storage device protection system efficiently by making the power supply switchable.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0020]
FIG. 1 is a block diagram of a digital copying machine in which a storage device protection system according to a first embodiment of the present invention has been introduced. 1 is a digital copying machine, 2 is a host computer, 10 is a large-capacity storage device, and 11 is an unauthorized detachment monitoring. Device, 12 is a hard key unit, 13 is a main control unit, 14 is an encryption / decryption device, 15 is a scanner unit that optically reads an image, 16 is a writing unit that writes an image on recording paper, 17 is a main power supply unit, and 18 is a main power supply unit. 2 shows a LAN I / F unit.
[0021]
The mass storage device 10, the unauthorized attachment / detachment monitoring device 11, and the hard key unit 12 are housed in the same case and are unitized (hereinafter, this unit is referred to as a storage device unit). The hard key unit 12 is provided so as to be operated externally.
[0022]
The large-capacity storage device 10 stores management image data input from the scanner unit 15 or image data input from the host computer 2 external to the digital copier 1, and performs document management. The unauthorized attachment / detachment monitoring device 11 monitors the removal of the mass storage device 10, and a request for switching between operation and release of the unauthorized attachment / detachment monitoring device 11 can be made by operating the hard key unit 12. The main control unit 13 controls the entire digital copying machine 1, and external devices connected to the scanner unit 15, the writing unit 16, and the LAN I / F unit 18 are controlled by the main control unit 13. The encryption / decryption device 14 processes stored data stored in the large-capacity storage device 10 or image data stored in the large-capacity storage device 10, and is encrypted or decrypted by the encryption / decryption device 14. The main power supply unit 17 supplies power to each unit in the digital copying machine 1, and supplies power to the storage device unit, the scanner unit 15, the writing unit 16, and the like.
[0023]
The host computer 2 can be connected to the digital copying machine 1 via the LAN I / F section 18, and a system for printing an image created in the host computer 2 by the digital copying machine 1 is configured. In addition, the image read by the scanner unit 15 or the image sent from the host computer 2 can be encrypted and stored in the large-capacity storage device 10 according to a user's instruction. It is also possible to send the read image or the image sent from the host computer 2 or the image read and decoded from the mass storage device 10 to the writing unit 16 for printing.
[0024]
FIG. 2 is a perspective view showing an outline of the internal structure of a storage device unit including a monitoring circuit for monitoring unauthorized attachment / detachment of a storage device. A monitoring circuit board, 22 is a BOX opening / closing sensor, 23 is a metal hard BOX case having an opening / closing part in a part and serving as an exterior of the storage device unit, 24 is a key slot provided on the monitoring circuit board 21, Reference numeral 25 denotes a monitoring release key composed of a hard key, reference numeral 26 denotes a hinge, and reference numeral 27 denotes a lock mechanism for locking the opening / closing portion of the hard BOX case 23.
[0025]
The HDD 20, the monitor circuit board 21, the BOX open / close sensor 22, and the lock mechanism 27 are fixed at predetermined positions in the hard BOX case 23. The HDD 20, the BOX open / close sensor 22, and the lock mechanism 27 are connected to the monitor circuit board 21 via a cable. Connected.
[0026]
The hard key portion 12 is constituted by the key slot 24 and the monitoring release key 25, and a small hole is provided in a portion of the hard BOX case 23 facing the key slot 24. External insertion into the key slot 24 is enabled. The main body of the hard BOX case 23 and the opening / closing portion are connected to each other by a hinge 26 so as to be openable and closable. In the hard BOX case 23, a small hole through which a cable for connecting the HDD 20 and the monitoring circuit board 21 to the encryption / decryption device 14 or the main power supply unit 17 is formed.
[0027]
If power is supplied to the monitoring circuit board 21, the detachable circuit is in a state of constantly monitoring whether or not the HDD 20 has been removed. When the BOX open / close sensor 22 detects that the open / close portion of the hard BOX case 23 has been opened in the monitoring state, the monitoring circuit on the monitoring circuit board 21 performs a fraud detection operation. The fraud detection operation will be described later. The monitoring state can be released by inserting the monitoring release key 25 into the key slot 24. Although an electronic type incorporating an ID chip is effective as the monitoring release key 25, a mechanical rotation type such as a key and a lock may be used. Here, when the monitoring release key 25 is an electronic type in which an ID chip is incorporated, it is necessary to provide a means for reading the data of the ID chip in the key slot 24, and the monitoring circuit board 21 is provided based on the data of the ID chip. The monitoring state is released only when the monitoring circuit of (a) determines that the monitoring release key 25 is correct. When the monitoring release key 25 is of a mechanical rotation type, the monitoring state is released when the monitoring release key 25 is inserted and rotated.
[0028]
The lock mechanism 27 is configured to release the lock state only when the monitoring release key 25 is inserted into the key slot 24 and the correct monitoring release key 25 is recognized. There are many lock mechanisms 27, such as a magnetic lock method using an electromagnet, and a method in which a lock is released when a solenoid is pulled using a spring and a solenoid, but the latter is an effective means in terms of energy saving. When a mechanical hard key is used, a lock mechanism by rotation rotation of the key may be used.
[0029]
FIG. 3 is a block diagram showing power supply of the storage device unit, 21a is a monitoring circuit, 21b is a data buffer, 21c is an address buffer, and the monitoring circuit board 21 has a monitoring circuit 21a, a data buffer 21b, and an address buffer. 21c is mounted. Reference numeral 30 denotes a secondary battery, and the secondary battery 30 and the BOX open / close sensor 22 are provided in the storage device unit.
[0030]
The power supplied to the monitoring circuit 21a includes a power supplied by turning on the SW1 of the main power supply unit 17 and a secondary battery mounted on the monitoring circuit board 21 when the SW1 such as the energy saving mode is OFF. There is a power supply to supply. The operation of SW1 is controlled by the CPU on the monitoring circuit 21a. As the SW1, a relay element, a DC converter, or the like can be applied, but the constituent members are not particularly limited. Although a chargeable / dischargeable battery is applicable as the secondary battery 30, an electric double-layer capacitor may be used.
[0031]
Next, the monitoring operation of the mass storage device 10 by the unauthorized attachment / detachment monitoring device 11 and the operation when the unauthorized removal is detected will be described with reference to FIGS.
[0032]
FIG. 4 is a flowchart illustrating the monitoring operation and the fraud detection operation by the fraudulent detachment monitoring device. The CPU on the monitoring circuit 21a constantly monitors the insertion of the monitoring release key 25 into the key slot 24 and the output of the BOX open / close sensor 22 (S1-1, 2, 3). When the insertion of the monitoring release key 25 is detected (S1-1), the monitoring state for unauthorized attachment / detachment of the HDD 20 is turned off (S1-4). When the monitoring state is turned off, the locked state by the lock mechanism 27 is released, and the HDD 20 can be attached and detached without processing the internal data (S1-5).
[0033]
When the monitoring release key 25 is not pointed in, the open / close portion of the hard BOX case 23 is locked by the lock mechanism 27. Therefore, normally, the output of the BOX open / close sensor 22 detects that the open / close portion is closed. (No in S1-3). Here, when the BOX open / close sensor 22 detects that the hard BOX case 23 has been opened and the monitoring release key 25 is not inserted, it is determined that an abnormality has occurred (Yes in S1-3, S1- 7) Data is sent from the data buffer 21b and the address buffer 21c to the HDD 20 according to the instruction of the monitoring circuit 21a, and the internal data of the HDD 20 is immediately processed and cannot be recovered (S1-7).
[0034]
With this configuration, the worker who attaches / detaches the HDD 20 can be limited to the person who owns the monitoring release key 25, and it is extremely difficult for a person who does not own the monitoring release key 25 to attach / detach. can do. In addition, by inserting the monitoring release key 25, both the release of the monitoring state and the release of the locked state are performed, so that the worker can easily perform the attaching / detaching work.
[0035]
FIG. 5 is a flowchart illustrating a monitoring operation and a fraud detecting operation by the fraudulent detachment monitoring device using a hard key having an ID chip.
[0036]
When the insertion of the monitoring release key 25 is not detected (No in S2-1), the insertion of the monitoring release key 25 into the key slot 24 and the output of the BOX open / close sensor 22 are constantly monitored (S2-3). If the insertion of the monitoring release key 25 is detected (Yes in S2-1), the unique information is compared with the data of the monitoring release key 25, and if they do not match (No in S2-2), the monitoring state is set. Is rejected and the monitoring state is continued (S2-3). If it is detected that the hard BOX case 23 has been opened in the monitoring state, it is determined that an abnormality has occurred (Yes in S2-4, S2-5), and the data buffer 21b and the address buffer 21c are instructed by the monitoring circuit 21a. Sends the data to the large-capacity storage device 10, and the internal data of the large-capacity storage device 10 is immediately processed and cannot be recovered (S2-6). The unique information is compared with the data of the monitoring release key 25, and if they match (Yes in S2-2), the unauthorized detachment monitoring state of the mass storage device 10 is released (S2-7). Further, the locked state by the lock mechanism 27 is released, and the storage device can be attached and detached without processing the internal data (S2-8).
[0037]
In this way, by embedding the writable ID chip in the monitor release key 25 and providing the monitor release key 25 with the unique information of each storage device unit and the unique information of the digital copying machine 1, the forgery of the monitor release key 25 can be prevented. Can be prevented.
[0038]
FIG. 6 is a flowchart illustrating a monitoring operation and a fraud detection operation by the fraudulent detachment monitoring device having a function of releasing a monitoring state using a password.
[0039]
The operation shown in FIG. 6 is effective only in the case of plug-in. When the power plug is disconnected, reading of the password from the ID chip and key input by the copier operation panel cannot be performed. The lock mechanism is not released even if it is inserted.
[0040]
If the insertion of the monitoring release key 25 is not detected (No in S3-1), the insertion of the monitoring release key 25 into the key slot 24 and the output of the BOX open / close sensor 22 are constantly monitored (S3-3). If the insertion of the monitoring release key 25 is detected (Yes in S3-1), the password is read from the ID chip of the monitoring release key 25, and is compared with the password stored in the memory of the monitoring circuit 21a in advance, and does not match. In this case (No in S3-2), release of the monitoring state is refused, and the monitoring state is continued (S3-3). When it is detected that the hard BOX case 23 has been opened in the monitoring state, it is determined that an abnormality has occurred (Yes in S3-4, S3-5), and the data buffer 21b and the address buffer 21c are instructed by the monitoring circuit 21a. Is sent to the HDD 20, and the internal data of the HDD 20 is immediately processed and cannot be recovered (S3-6). If the passwords match (Yes in S3-2), the user is prompted to select whether or not to change the password (S3-7). If the password is not changed (No in S3-7), the monitoring state of the HDD 20 is released. (S3-8). When the password is to be changed (Yes in S3-7), a new password is input by key input on the copier operation panel (S3-10), and is stored in the ID chip of the monitoring release key 25 and the memory of the monitoring circuit 21a. After the password is updated (S3-11), the monitoring state of the HDD 20 is released (S3-8). Further, the locked state by the lock mechanism 27 is released, and the storage device can be attached and detached without processing the internal data (S3-9).
[0041]
By the way, in a copying machine, there are a standby state in which copying can be performed immediately, an energy saving mode in which power is cut off by partially turning off a power source, and an OFF mode in which a main switch is turned off.
[0042]
FIG. 7 is a flowchart showing power supply to the storage device unit in the energy saving mode. First, it is determined whether or not the copying machine has shifted to the energy saving mode (S4-1). If the mode has not shifted (No in S4-1), the normal operation is continued (S4-2). When the main body of the copying machine shifts to the energy saving mode (Yes in S4-1), the power supply from the main power supply unit 17 to the monitoring circuit 21a is turned off (S4-3), and the power source mounted on the monitoring circuit board 21 is turned off. Switching is performed so that power is supplied from the next battery 30 to the monitoring circuit 21a (S4-4). In the energy saving mode, the CPU on the monitoring circuit board 21 monitors the remaining capacity of the secondary battery 30 (S4-5), and if the mode is not returned from the energy saving mode to the normal mode, the voltage of the secondary battery 30 becomes the reference voltage. If it is determined that the remaining capacity has decreased and the remaining capacity has become small (Yes in S4-6), the CPU outputs a signal requesting power supply from the main power supply unit 17 before the remaining capacity becomes zero (S4-6). (S4-7), the power supply source is switched to the main power supply unit 17 (S4-8). At the same time, charging of the secondary battery 30 is started (S4-9). When the secondary battery 30 is fully charged (Yes in S4-10), the CPU instructs to switch the power supply to the secondary battery 30 again (Yes in S4-1, S4-3).
[0043]
As long as the energy saving mode is not canceled as described above, charging and discharging of the secondary battery are repeated, and monitoring of the removal of the mass storage device 10 is continued.
[0044]
FIG. 8 is a flowchart showing power supply to the storage device unit in the OFF mode.
[0045]
FIG. 8 is a power supply operation flow of the unauthorized detachment monitoring circuit when the main switch is in the OFF state. First, it is determined whether or not the copying machine has shifted to the OFF mode (S5-1). If not (No in S5-1), the normal operation is continued (S5-2). When the copying machine main body shifts to the OFF mode (Yes in S5-1), the power supply from the main power supply unit 17 to the monitoring circuit 21a is turned off (S5-3), and the power source mounted on the monitoring circuit board 21 is turned off. Power is supplied from the secondary battery 30 to the monitoring circuit 21a (S5-4). In the OFF mode, the CPU on the monitoring circuit board 21 monitors the remaining capacity of the secondary battery 30 (S5-5), and if the mode is not returned from the OFF mode to the normal mode, the voltage of the secondary battery 30 becomes the reference voltage. If it is determined that the remaining capacity has decreased and the remaining capacity has become small (Yes in S5-6), the CPU outputs a signal requesting power supply from the main power supply unit 17 before the remaining capacity becomes zero (S5-6). In step S5-7, the power supply source is switched to the main power supply unit 17 (S5-8). At the same time, charging of the secondary battery 30 is started (S5-9). When the secondary battery 30 is fully charged (Yes in S5-10), the CPU instructs to switch the power supply to the secondary battery 30 again (Yes in S5-1, S5-3).
[0046]
Therefore, unless the main switch of the main control unit 17 is turned on and the OFF mode is released, the charging and discharging of the secondary battery are repeated, and the monitoring of the removal of the HDD 20 is continued.
[0047]
By supplying the power in this manner, the monitoring circuit 21a continues to monitor the unauthorized attachment / detachment operation of the HDD 20, even if the main body copier is in any state mode, when the power plug of the digital copier 1 is plugged in. be able to.
[0048]
The embodiment has been described above, but the embodiment of the present invention is not limited to the above. For example, in the present embodiment, a digital copying machine has been described as an example of the information device, but the information device is not limited to this, and may be a printer, a facsimile machine, or a multifunction peripheral.
[0049]
【The invention's effect】
With the configuration as described above, when the storage device is removed for maintenance or the like, the operation of the detachment monitoring device can be controlled by providing a key for obtaining permission for removal, and monitoring by the detachment monitoring device can be performed. Since the method of releasing the state becomes complicated, the attaching / detaching operation of the storage device can be limited to the person who owns the key.
[Brief description of the drawings]
FIG. 1 is a block diagram of a digital copying machine in which a storage device protection system according to a first embodiment of the present invention is introduced. FIG. 2 is a schematic diagram of an internal structure of a storage device unit including a monitoring circuit for monitoring unauthorized attachment / detachment of a storage device. FIG. 3 is a block diagram showing power supply of the storage device unit. FIG. 4 is a flowchart for explaining a monitoring operation and a fraud detecting operation by the fraudulent / removal monitoring device. FIG. 5 uses a hard key having an ID chip. FIG. 6 is a flowchart for explaining a monitoring operation and a fraud detection operation performed by the unauthorized desorption monitoring device according to the embodiment. FIG. 6 is a flowchart for explaining a monitoring operation and a fraud detection operation performed by the unauthorized desorption monitoring device having a function of releasing a monitoring state using a password. FIG. 7 is a flowchart showing the power supply of the storage device unit in the energy saving mode. FIG. 8 shows the power supply of the storage device unit in the OFF mode. Low view DESCRIPTION OF SYMBOLS
DESCRIPTION OF SYMBOLS 1 Digital copying machine 2 Host computer 10 Mass storage device 11 Unauthorized attachment / detachment monitoring device 12 Hard key unit 13 Main control unit 14 Encryption / decryption device 15 Scanner unit 16 Writing unit 17 Main power supply unit 18 LAN I / F unit 20 HDD
Reference Signs List 21 monitoring circuit board 22 BOX open / close sensor 23 hard BOX case 24 key slot 25 monitoring release key 26 hinge 27 lock mechanism 30 secondary battery

Claims (11)

A storage device that stores the input information and outputs desired information from the stored information, and monitors the removal of the storage device. If it is determined that the storage device may be illegally removed, A storage device protection system having a desorption monitoring device for processing data in the storage device,
A storage device protection system, wherein the detachment monitoring device is provided with a key slot and control means for canceling a monitoring state by the detachment monitoring device when a key is inserted into the key slot from outside. 2. The storage device protection system according to claim 1, wherein a device-specific data is added to a key, and said detachment monitoring device is provided with means for reading said device-specific data. 3. The storage device protection system according to claim 2, wherein a rewritable ID chip is provided on the key. 4. The storage device protection system according to claim 1, wherein the detachment monitoring device and the storage device are housed in a metal exterior housing. An external housing that houses the detachment monitoring device and the storage device, and a lock mechanism that locks an open / close portion of the external housing, and releases a locked state when a key is inserted into the key slot from outside. 4. The storage device protection system according to claim 1, wherein: An exterior housing that houses the detachment monitoring device and the storage device, and a lock mechanism that is provided inside the exterior housing and locks an opening / closing portion of the exterior housing and electrically unlocks the exterior housing. The storage device protection system according to claim 1, 2 or 3. 7. An information device comprising: the storage device protection system according to claim 1; and a main power supply unit configured to supply power to each unit in the storage device protection system and the information device main body. In the system, a secondary battery for supplying power to the detachment monitoring device is provided, and when power supply from the main power supply unit to the storage device protection system is stopped, the secondary battery supplies power to the detachment monitoring device. Information equipment characterized by supplying. An energy-saving mode for supplying power to a part of each unit in the information device main body, and when shifting to the energy-saving mode, power is supplied from the secondary battery to the detachment monitoring device. 7. Information equipment according to 7. 9. The information device according to claim 7, wherein power is supplied from the secondary battery to the detachment monitoring device in an off mode in which a main switch of the information device is off. When the remaining capacity of the secondary battery becomes equal to or less than a predetermined value, the detachment monitoring device outputs a command to turn on the power supply for the detachment monitoring device, and supplies power to the detachment monitoring device from the main power supply unit. 10. The information device according to claim 7, 8 or 9, wherein the information device is switched to supply the information. When the remaining capacity of the secondary battery is equal to or less than a predetermined value and the power supplied to the detachment monitoring device is switched from the secondary battery to the main power supply unit, the secondary battery is charged, and when the secondary battery is fully charged. 11. The information device according to claim 10, wherein power supplied from the main power supply unit to the desorption monitoring device for the secondary battery is switched.

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