JP2004355703A - Attachment and detachment unit housing several storage media - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment and detachment unit capable of clearly indicating a faulty storage medium in such a manner that the faulty storage medium can be surely specified at the time of an operation to take out the faulty storage medium regardless of whether the attachment and detachment unit is within an electronic equipment body device or outside the device and without providing the attachment and detachment unit with a driving source, and without depending on a display means, such as a CRT. <P>SOLUTION: When the detection of the faulty storage medium 4 is performed by the electronic equipment body device, an actuator present at a position corresponding to the faulty storage medium 4 is selectively driven and a locking member 14 constituting a mechanism to lock/unlock the faulty storage medium 4 is detached from the groove of the storage medium 4, and the storage medium 4 is unlocked. When the attachment and detachment unit 1 is taken out of the electronic equipment body device in this state and a cover 2 is opened, the locking of the displacement of the faulty storage medium 4 in its taking out direction is fully eliminated and only the faulty storage medium 4 is pushed out by a compression spring in the taking out direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a detachable unit that includes a storage unit that stores a plurality of storage media and that detachably connects the plurality of storage media to an electronic apparatus main body device.
[0002]
[Prior art]
Storage media such as hard disks are widely used in electronic devices such as personal computers and servers. The storage medium can store various data such as system software represented by an OS (Operating System), application software, and application data. In the minimum system configuration, all information is stored in one storage medium, and the electronic device main unit is operated. However, if a failure such as a failure or an operation failure occurs in the sole storage medium, stored data cannot be read, and a problem may occur that the electronic device main body device does not operate normally.
[0003]
Therefore, a disk array system has been proposed for the purpose of backing up data between a plurality of storage media and protecting the data.
[0004]
The disk array system includes two or more storage media, at least each storage medium being configured to serve as a temporary storage for an initial portion of data stored on the disk array system, and for storing this data. It is configured to serve as a backup storage device for the second part.
[0005]
Some disk array systems are pre-installed in the main unit of the electronic device, but there have been proposed ones in which a plurality of storage media are unitized and collectively detachable from the main unit of the electronic device. Such a disk array system is effective not only for detachability but also for management under off-line conditions outside the electronic device main unit (for example, see Patent Document 1).
[0006]
In a disk array system in which a plurality of storage media record data in cooperation with each other, data is backed up between the storage media. Therefore, a plurality of storage media constituting the system use a normally operating storage media. Must be replaced immediately if defective. If left in that state, there is a possibility that a problem that information stored in the system cannot be read out may occur. Therefore, in order to identify a defective storage medium among storage media that can be attached to and detached from the electronic apparatus main unit and to facilitate replacement work, when there is a defect in a plurality of storage media, a defect determination unit is used. A method has been proposed in which a connection detachably connected to a data path is released to release the defective storage medium from the front surface of the case by urging means (for example, see Patent Document 2).
[0007]
[Patent Document 1]
JP-A-11-282636 [Patent Document 2]
JP-A-10-198527
[Problems to be solved by the invention]
However, in the former of the above-mentioned conventional disk array systems, in a detachable unit that attaches and detaches a plurality of storage media to and from the electronic apparatus main body at a time, a defective storage medium is included in a plurality of built-in storage media. When it is detected that there is no means for displaying the defect information, the user needs to know the defect information and the location of the defect storage medium using a display means such as a CRT (Cathode Ray Tube) of the electronic apparatus main body. Was. Also, in this case, when the position where the detachable unit is stored in the electronic device main unit is separated from the position of the display means such as a CRT, or when the display unit is not visible due to removal of the detachable unit from the electronic device main unit. The operator who takes out the faulty storage medium performs an operation of identifying and taking out the faulty storage medium indicated by the display means based on the storage of the faulty storage medium. There is a problem that a good product is taken out and discarded without taking out the medium.
[0009]
Further, in the latter of the above-mentioned conventional disk array systems, the locking by the hook provided in the case is released by an actuator such as an electromagnet, and the defective storage medium is removed. If it becomes necessary to remove the hook, a troublesome operation such as starting the electromagnet and releasing the hook is required. Further, when the pre-storage medium is removed for security and stored in a safe place, it is necessary to repeat the releasing operation according to the number of storage media. Further, when a failure occurs in the disk array control unit itself and the disk array control unit cannot be released, for example, the disk array control unit must be left in the hook locked state. A similar problem occurs when the system cannot be started due to a power failure or the like. Furthermore, when a group of storage media having a raid structure and being organically related is stored in an individual state, there is a risk that other items may be mistaken for another one.
[0010]
The present invention has been made by paying attention to these points, irrespective of whether the detachable unit is inside or outside the electronic device main unit, without providing a drive source in the detachable unit, and displaying a CRT or the like. An object of the present invention is to provide a detachable unit capable of clearly specifying a defective storage medium so as to be identifiable at the time of an operation of removing the defective storage medium without relying on means.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the detachable unit according to claim 1, further comprising a storage unit that stores a plurality of storage media, wherein the plurality of storage media are detachably connected to an electronic device main unit. An urging means for urging each of the plurality of storage media individually from the storage portion in a removing direction by an elastic body, and a latch for locking a displacement of the storage medium by the urging means. Switching means for switching between a state and a permission state to be permitted, wherein the electronic device main body is detected when a defect storage medium is detected by detecting means for detecting a defect storage medium provided in the electronic device main body device. When the actuating means provided in the device acts on the switching means, the displacement of the defective storage medium is switched to a permitted state, and the detachable unit is connected to the electronic device main body. When taken out of the device, said non degree storage medium, characterized in that projecting from the detachable unit.
[0012]
The detachable unit according to claim 2 is the detachable unit according to claim 1, wherein the detachable unit is an opening / closing lid provided at an entrance of the storage unit. In addition to the switching to the locking state, the malfunctioning storage medium in which the locking state has been switched to the permission state further has an opening / closing lid for locking the displacement in the removal direction, and the opening / closing lid is opened. In some cases, the locking of the defective storage medium with respect to the displacement in the removal direction is released, and the defective storage medium protrudes from the detachable unit.
[0013]
Further, the detachable unit according to claim 3 is the detachable unit according to claim 1 or 2, wherein the plurality of storage media store data in cooperation with each other.
[0014]
According to a fourth aspect of the present invention, there is provided a detachable unit for storing a plurality of storage media individually, and biasing each of the plurality of storage media so as to be individually displaced from the storage unit in a removal direction. An urging means, a lid means for covering the storage portion, and a suppressing means for individually suppressing the displacement of the storage medium by the urging means, wherein when the lid means is opened, the displacement is suppressed by the suppressing means. A storage medium that has not been moved is displaced from the storage means in a removal direction.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a diagram illustrating a state in which the detachable unit 1 is attached to and detached from the electronic apparatus main body device 7. FIG. 2 is a diagram showing the inside of the attaching / detaching portion 7a. FIG. 3 is a perspective view showing the detachable unit 1 and a storage medium incorporated in the detachable unit 1. FIG. 4 is an external connection connector unit for connecting the stored storage medium to the electronic apparatus main unit. FIG.
[0017]
In these drawings, the electronic device main body device 7 has a detachable unit 7a for attaching the detachable unit 1, and the detachable unit 1 is detachable from the detachable unit 7a. At the time of attachment / detachment, in the attachment / detachment process of the attachment / detachment unit 1, a surface in contact with the attachment / detachment unit 1 inside the attachment / detachment unit 7 a guides the outer periphery of the attachment / detachment unit 1. It is located. The board 12 is located in a direction opposite to the mounting direction of the detachable unit 1, and the receptacle connectors 8 to 11 are surface-mounted on the board 12.
[0018]
The holding unit 2b is attached to the detachable unit 1 so that it can be held by hand and easily detached. The grip portion 2b has a holding portion 2b2, and makes a holding motion by rotating the holding portion 2b2 at an angle of about 90 degrees about the rotation center 2b1 in a direction away from the detachable unit 1. In this manner, the attachment / detachment unit 1 is held by holding the holding unit 2b2 of the holding unit 2b, and the attachment / detachment is performed.
[0019]
The detachable unit 1 contains four storage media 3 to 6. The storage media 3 to 6 are mounted in the electronic device main unit 7 and cooperate with each other to constitute a disk array system for recording data. The detachable unit 1 has four openings 1a and the like on the surface facing the grip 2b, and the only external connection connectors 3a to 6a that the storage media 3 to 6 have from the openings 1a and the like. When the storage media 3 to 6 are stored in the detachable unit 1 and attached to the detachable unit 7a, the external connection connectors 3a to 6a are connected to the electronic device main unit 7 side. The electrical connection is made by fitting with the receptacle connectors 8 to 11, respectively. The storage medium 3 and the like in the detachable unit 1 are guided so as to be located in a set position range by a surface in contact with the storage medium 3 and the like in a storage location of a storage unit 100 (see FIG. 5) of the detachable unit 1 to be described later. Since the detachable unit 1 is also guided so as to be within a predetermined position range of the detachable unit 7a, the external connector 3a such as the storage medium 3 housed in the detachable unit 1 and the receptacle connector 8 or the like are fitted. Can be performed correctly.
[0020]
A flexible cable (not shown) for connecting the receptacle connector 8 and the like to a main board (not shown) of the main body device 7 is provided on the surface of the substrate 12 opposite to the surface on which the receptacle connector 8 and the like are provided. Is mounted, and when the detachable unit 1 is attached to the detachable portion 7a, the external connector 3a and the like, the receptacle connector 8 and the like and the flexible cable are electrically connected to each other to form an electrical connection path. Recording / reproducing operations such as reading and writing of data by the electronic device main unit 7 are performed through this path. By attaching the detachable unit 1 to the detachable unit 7 in this manner, the storage media 3 to 6 stored in the detachable unit 1 can be accessed.
[0021]
Further, the detachable unit 1 has a lid 2 for locking the displacement of the storage media 3 to 6 in the removal direction. The lid 2 is rotatably supported by the detachable unit 1 about a rotation center 2c. Normally, the lid 2 is closed when used by being mounted on the electronic apparatus main body device 7 and is opened when the storage media 3 to 6 are replaced. The lid 2 is urged in the opening direction. When the left and right lock release levers 2a are tilted, the lid 2 is opened, and when the opened lid 2 is closed to a predetermined position, the lid 2 is automatically opened. And the lid 2 is kept closed until the lock release lever 2a is tilted next time.
[0022]
Next, a method of storing the storage media 3 to 6 in the detachable unit 1 will be described.
[0023]
FIG. 5 shows a state where the lid 2 is opened and the storage media 3 to 6 are stored in the storage section 100 of the detachable unit 1. In FIG. 1, when the lid 2 is opened, the storage section 100 is exposed. The storage unit 100 includes four storage locations, and each of the storage media 3 to 6 is stored therein. After storing the storage media 3 to 6 to the position of the storage medium 3 as shown in FIG. 3, when the lid 2 is closed, the lid 2 presses the rear end surfaces of the storage media 3 to 6 and the storage media 3 to 6 Is moved to a predetermined position. Thereafter, when the lid 2 reaches a predetermined position, the lid 2 is locked as described above, and the storage of the storage media 3 to 6 is completed.
[0024]
Next, a failure detection method will be described. Here, a case where the storage medium is a hard disk device will be described.
[0025]
FIG. 10 is a block diagram showing a control function configuration of the electronic device main body 7 and the storage media 3 to 6 in the detachable unit 1. In the description, the storage medium 3 among the four storage media 3 to 6 will be described as a representative.
[0026]
The electronic device main unit 7 and the storage media 3 to 6 accommodated in the detachable unit 1 are connected via an interface 37 to constitute a disk array system. As shown in FIG. 10, the electronic device main unit 7 includes a CPU (Central Processing Unit) 38, a RAM (Random Access Memory) 40, a ROM (Read-Only Memory) 39, a storage device 43 including a RAM with a backup power supply, and an external device. An external connection interface 44 for connection with peripheral devices, a plurality of interfaces 37 composed of LSIs and the like and connected to the storage media 3 to 6, a timer 42, a counter 41, and controls for driving the actuators 21 to 24 It is composed of a part 36 and actuators 21 to 24.
[0027]
A control program is stored in the ROM 39, and the CPU 38 controls the electronic device main unit 7 such as an access process to the storage medium 3 using the RAM 40 as a work area based on the control program. The CPU 38 also controls the storage medium 3 and the actuators 21 to 24 connected to the interface 37.
[0028]
On the other hand, the storage medium 3 has a CPU 30, a ROM 31, a RAM 32, a magnetic disk, a recording disk unit 34 having a discrimination information recording unit 35 for recording information determined by the CPU 30, and a timer 33. The discrimination information recording unit 35 accumulates and stores the number of times an error has occurred based on the judgment of the CPU 30, accumulates and stores the number of defective sectors each time it is determined that there is a defective sector, and every time the storage medium 3 operates. The operating time is cumulatively stored. The ROM 31 stores a control program, and the CPU 30 controls the storage medium 3 using the RAM 32 as a work area based on the control program. The disk array system of the present embodiment is configured as described above.
[0029]
Next, a failure mode of the storage medium 3 detected by the electronic device main body device 7 will be described.
[0030]
First, a failure refers to a state in which at least one of reading and writing of data from and to the hard disk device has exceeded a certain number of times. For example, there is a state in which data is destroyed due to a scratch or the like on the surface of the hard disk, or a state in which access is not possible at all due to a failure of an electric component in the hard disk device. In this case, since the storage medium 3 cannot output the defect information to the electronic device main unit 7, the detection of the defect is performed in the electronic device main unit 7. The CPU 38 accesses the storage medium 3 a fixed number of times, counts the number of times that data could not be read or written by the counter 41, accumulates the count in the storage device 43, and monitors the count every time the access is performed. It is determined that there is a problem when the count exceeds a predetermined number. The timer 42 measures the time from when a command for accessing the storage medium 3 is issued from the CPU 38 to when a response is returned, and when there is no response within a predetermined time, that is, when a timeout occurs, it is determined that there is a problem. I do.
[0031]
Second, even if the data cannot be completely read / written, errors such as data read / write occur at a frequency exceeding a certain level, the number of defective sectors that cannot be read / written reaches a certain number or more, or the cumulative number of defective sectors cannot be reached. If the operation state of each hard disk device or the state of the hard disk satisfies a predetermined condition for a predetermined determination item, such as whether the operation time exceeds a predetermined time, it is also determined that there is a problem. In this case, since the storage medium 3 can output the defect information to the electronic device main unit 7, the detection of the defect is performed in the storage medium 3, and the defect information is transmitted to the electronic device main unit 7. Specifically, a certain time is measured by the timer 33, and at that time interval, the CPU 30 accesses the discrimination information recording unit 35 and accumulates the number of errors, the number of defective sectors, and the operation time in the discrimination information recording unit. Keep it. At the same time, each time the CPU 30 accesses the discrimination information recording unit 35, it monitors whether any of the following conditions (1) to (3) is satisfied. The CPU 38 in the electronic device main unit 7 determines that there is a defect.
(1) Whether there are L or more defective sectors (2) Whether the number of occurrences of read / write errors is M or more (3) Whether the accumulated operation time is N hours or more (where L, N, and M are arbitrary) Is a positive integer of
Based on the above defect information, the electronic device main unit 7 drives actuators 21 to 24 (see FIG. 8) described later.
[0032]
Next, a description will be given of a method of operating the locking / releasing mechanism of the electronic device main body device 7 based on the detection of the failure to release the locking of the displacement of the storage medium 3 or the like in the detachable unit 1.
[0033]
FIG. 6 is a partially cutaway view showing a locking / releasing mechanism of the detachable unit 1. FIG. 7 is an enlarged view of the locking / releasing mechanism and the urging mechanism of FIG.
[0034]
In both figures, the lock member 13 is rotatably supported by a shaft fixed to the housing of the detachable unit 1. The locking member 13 is provided with a locking portion 13 a at the tip end for entering the groove 3 b of the storage medium 3 and locking the displacement of the storage medium 3. The state of the lock member 13 shown in the figure indicates the position where the displacement of the storage medium 3 is locked, and the locking portion 13a rotates in a direction away from the storage medium 3 to release the lock. Located in place. When storing the storage media 3 to 6, the lock is normally released.
[0035]
The lock member 13 is supported by a connecting rod 17 that moves in conjunction with the lock member 13. The connecting rod 17 is guided by two pins fixed to the housing of the detachable unit 1, and is supported so as to move left and right in parallel. A rack is formed in a part of the connecting rod 17, and the rack meshes with a pinion 18 rotatably supported by a shaft fixed to the housing of the detachable unit 1, and the connecting rod 17 moves. Then, the pinion 18 rotates. Further, the pinion 18 is guided by two pins fixed to the attaching / detaching unit 1, meshes with the rack portion of the connecting rod 19 partially formed with a rack, and moves the connecting rod 19. Similar to the lock member 13, a lock member 20 for locking the displacement of the storage medium 3 is supported by the connecting rod 19 so as to operate in conjunction therewith, and the lock member 13 and the lock member 20 move in conjunction. Accordingly, when one of the connecting rods 17 and 19 is locked, the other is also locked, and when one is unlocked, the other is also unlocked. A reversing spring 21 having two stable states is hung on the connecting rods 17, 19, and the locking is selectively released in conjunction with the movement of the connecting rods 17, 19 (first state). (A stable state) and stopped in a locked state (a second stable state). When in a stable state, the connecting rods 17, 19 and the mechanism interlocked therewith are maintained in this state unless an external force is applied.
[0036]
To release the lock by applying an external force, the surface 13b or the like may be pressed and the lock member 13 may be rotated until the first stable state is reached. Conversely, when engaging the lock, the surface 13c may be pressed and the lock member 13 may be rotated until the second stable state is reached.
[0037]
As shown in FIG. 6, the detachable unit 1 is provided with a compression spring 26 for urging the storage medium 3 in the take-out direction. When the storage medium 3 is stored, the compression spring 26 is compressed, and the reaction force is applied to the storage medium 3. When the storage medium 3 is held in this state and the above-described lock member 13 is engaged, the displacement of the storage medium 3 is locked by the lock member 13, the compression spring 26 remains compressed, and the storage medium 3 is compressed. The reaction force of the spring 26 remains applied. Therefore, if the lock by the lock member 13 is released with the lid 2 opened, the storage medium 3 is pushed out in the take-out direction. The detachable unit 1 also has a mechanism for locking and releasing a similar lock member and the like and a mechanism for urging with a compression spring at the storage position where the other storage media 4 to 6 are stored.
[0038]
Thus, together with the lid 2, the lock member 13 locks the displacement of the storage medium 3 in the removal direction.
[0039]
Further, a state in which the electronic device main unit 7 releases the lock by the lock member will be described.
[0040]
FIG. 8 is a partially broken perspective view showing the inside of the detachable unit 1 attached to the electronic device main unit 7 and the inside of the electronic device main unit 7.
[0041]
Among the actuators 21 to 24 such as a motor and a plunger, the actuator 21 is arranged and fixed at a position for pressing the surface 13 b (see FIG. 6) for unlocking, and the actuator 21 is driven. When pressed, it is configured to press the surface 13b. As described above, when the electronic device main unit 7 detects the defective storage medium, the actuator at the position corresponding to the defective storage medium is selectively driven, and a mechanism for locking and releasing the defective storage medium is provided. The constituent lock members 13 and 20 are detached from the groove 3b of the storage medium 3, and the locking of the storage medium 3 is released. FIG. 8 shows a state in which the actuator 22 is driven and the lock member 14 is released.
[0042]
Next, a state when the detachable unit 1 is taken out from the state of FIG. 8 will be described.
[0043]
FIG. 9 shows a state in which the detachable unit 1 is taken out of the electronic device main unit 7 and the cover 2 is opened.
[0044]
When the detachable unit 1 is removed from the electronic device main unit 7 and the lid 2 is opened in a state where the lock corresponding to the defective storage medium 4 is released, all the locking of the displacement of the defective storage medium 4 in the removal direction is eliminated. Thus, only the defective storage medium 4 is pushed out in the take-out direction by the above-mentioned compression spring.
[0045]
In this way, since only the defective storage medium 4 is pushed out in the take-out direction, the defective storage medium 4 can be reliably specified, and the defective storage medium 4 can be grasped and replaced as it is, so that operability is improved. good. Further, if the lid 2 can be opened even when the detachable unit 1 is attached to the electronic device main body device 7, the defect storage medium 4 can be stored by the above-described method of specifying the defect storage medium 4. It goes without saying that the medium 4 can be specified or exchanged.
[0046]
Next, a second embodiment of the present invention will be described.
[0047]
FIG. 11 is a partially cutaway view showing another embodiment of the lock member 13 described in FIG.
[0048]
The lock member 50 has substantially the same function as the function of the lock member 13. The difference is that it has a pressed portion 50c. As shown in FIG. 11A, when the storage medium 3 enters the pressed portion 50c, the front surface of the storage medium 3 presses the pressed portion 50c, and the lock member 50 rotates around the rotation center 50b. Then, the locking portion 50a enters the groove 3b and locks the storage medium, as shown in FIG. 11B.
[0049]
In this manner, the pressed portion 50 c can be pressed by the front surface of the storage medium 3 to lock the storage medium 3.
[0050]
As described above, if the lock member 50 is stabilized in this state, the locked state of the storage medium 3 can be maintained unless the lock member 50 rotates.
[0051]
【The invention's effect】
As described above, according to the present invention, when a defective storage medium is replaced, its position is clearly indicated by being displaced in the detaching direction of the detachable unit. The defective storage medium can be specified without relying on the storage of the defective storage medium. For this reason, it is possible to prevent a storage medium having no defect from being taken out by mistake. Further, since the defective storage medium is pushed out in the take-out direction, the labor required for replacement can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a state in which a detachable unit 1 is attached to and detached from an electronic apparatus main body device 7;
FIG. 2 is a diagram showing the inside of a detachable unit 7a.
FIG. 3 is a perspective view showing the detachable unit 1 and a storage medium incorporated in the detachable unit 1.
FIG. 4 is a perspective view showing an external connection connector unit for connecting a stored storage medium to an electronic device main unit.
FIG. 5 is a diagram showing a state in which the cover 2 is opened and storage media 3 to 6 are stored in the storage section 100 of the detachable unit 1;
FIG. 6 is a partially cutaway view showing a locking / releasing mechanism of the detachable unit 1.
FIG. 7 is an enlarged view of a locking / releasing mechanism and an urging mechanism of FIG. 6;
FIG. 8 is a partially cutaway perspective view showing the inside of the detachable unit 1 mounted on the electronic device main unit 7 and the inside of the electronic device main unit 7;
FIG. 9 is a diagram illustrating a state in which the detachable unit 1 is removed from the electronic apparatus main body device 7 and the lid 2 is opened.
FIG. 10 is a block diagram showing a control function configuration of the electronic device main body 7 and the storage media 3 to 6 in the detachable unit 1.
11 is a partially cutaway view showing another embodiment of the lock member 13 described in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Detachable unit 2 Lid 3-6 Storage media 3a-6a External connection connector 7 Electronic device main unit 7a Detachable part 8-11 Receptacle connector 13-16 Lock member 21-24 Actuator 26 Compression spring 50 Lock member 50a Lock part 50c Pressed part 100 storage part

Claims (4)

In a detachable unit that includes a storage unit that stores a plurality of storage media and detachably connects the plurality of storage media to an electronic device main unit,
Biasing means for biasing each of the plurality of storage media individually by the elastic body so as to be displaced in the removing direction from the storage section;
Switching means for switching between a locking state for locking the displacement of the storage medium by the urging means and a permission state for permitting,
By detecting means for detecting a defective storage medium provided in the electronic device main unit, when a defective storage medium is detected, an operating unit provided in the electronic device main unit acts on the switching unit. The detachable unit is characterized in that, when the displacement of the defective storage medium is switched to a permission state and the detachable unit is taken out of the electronic device main unit, the defective storage medium protrudes from the detachable unit. An opening / closing lid provided at an entrance of the storage section, wherein the plurality of storage media is switched to the locked state by closing the openable lid, and the locked state is switched to the permission state. The storage medium further includes an opening / closing lid for locking the displacement in the removal direction,
2. The defective storage medium according to claim 1, wherein when the opening / closing lid is opened, the locking of the defective storage medium against displacement in the removing direction is released, and the defective storage medium protrudes from the detachable unit. Detachable unit. The detachable unit according to claim 1, wherein the plurality of storage media store data in cooperation with each other. Storage means for individually storing a plurality of storage media;
Urging means for urging each of the plurality of storage media to be individually displaced from the storage means in the removal direction;
Lid means for covering the storage section,
Inhibiting means for individually inhibiting the displacement of the storage medium by the urging means,
A detachable unit, wherein when the lid is opened, a storage medium that is not inhibited by the inhibition means is displaced from the storage means in a removal direction.

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