JPH1139101A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for realizing the same storage capacity as a conventional device without the need of adding a disk drive. SOLUTION: This disk device is provided with a changer part 14a for changing a disk, a controller part 11a for instructing the change of the disk to the changer part 14a and a standard interface 17a for which this disk device is specified by a logical unit number from a host system 2. In this case, the controller part 11a gives an instruction to the changer part 14a to change to the disk corresponding to the logical unit number specified from the host system 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk device such as an optical disk device which is a peripheral device connected to a host system such as a personal computer or a workstation.

[0002] The functions of an optical disk device include a disk controller (hereinafter referred to as ODC; optical disk controller) and a disk drive (hereinafter referred to as ODD; optical disk).
drive). The function of ODC is SCS
The main role is to control the I (small computer system interface) interface. The main role of the ODD is to write data to a medium (optical disk) and read data from the medium in response to a command from the ODC.

[0003]

2. Description of the Related Art In a conventional optical disk apparatus, connection with a host system is performed by using a standard interface SC
Adopts SI interface. The SCSI interface specification states that an SCS that can be connected to a SCSI bus
The number of I-controllers (included in the functions of the ODC) is determined to be a maximum of seven, and a logical unit number (hereinafter, LUN) is provided under one ODC.
Is determined to be a maximum of eight. This LUN is
It refers to ODD.

Therefore, in the conventional device, to increase the amount of data that can be simultaneously accessed from the host system, the
It was necessary to increase the number of DDs. Up to 56 ODDs (7 x 8) can be added.

FIG. 12 is an explanatory diagram of a conventional example. FIG. 12 shows a maximum system configuration in a conventional apparatus. Personal computer (PC) or workstation (W
S) and the like, the host system 2 includes seven ODCs (SCSI
Device identification numbers (ID) 0 to 6) are connected in a scrambled manner on a SCSI bus. One ODC is provided with eight ODD0 to ODD7 (0 to 7 in LUN).

The host system 2 specifies a LUN through an SCSI interface identification message, and reads / writes data.

[0007]

In the above-described conventional device, when the amount of data handled from the host system is increased, O
It is necessary to increase the DD, and there is a problem that an installation place and cost increase.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such a conventional problem and to provide a device which realizes the same storage capacity as that of the conventional device and does not require an additional ODD.

[0009]

FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, 2 is a host system, 11a is a controller, 12a is a drive, 13 is a changer mechanism controller, 14a is a changer, and 17a is a standard interface.

The present invention is configured as follows to solve the above-mentioned conventional problems. (1): Changer section 14 for changing disks
a controller 11a for instructing the changer unit 14a to change disks, and a host system 2
And a standard interface 17a in which a disk unit is designated by a logical unit number. The controller unit 11a issues an instruction to switch to a disk corresponding to the logical unit number designated by the host system 2. Is performed on the changer portion 14a.

(2) In the disk device of (1), the changer mechanism control unit 13 is a unitized unit for changing the disk in the changer unit 14a.
And a unitized drive 12a for instructing the controller 11a to change the disc to the changer mechanism controller 13. The drive 12a and the changer mechanism controller 13 are directly connected by a signal line.

(3) In the disk device of (1), the changer mechanism controller 13 for changing the disk to the changer section 14a, and the changeover of the disk to the changer mechanism controller 13 by the controller section 11a. And a communication means between the drive 12a and the changer mechanism controller 13 using the RS-232C.

(4) In the disk device of (1), the logical unit number is made to correspond to a slot number in which the disk is stored. (5): In the disk device of (1), a door and a door key for opening and closing the door are provided in the disk loading / unloading section.

(6) In the disk device of (5), when the disk is loaded, the door is operated to return to the slot for storing the disk, and the door is opened after the return is completed. .

(7) In the disk device of (5), an eject button is provided for each slot for accommodating the disk, and the disks are inserted / ejected one by one by operating the eject button.

(8) In the disk device of (5), a display unit corresponding to each slot for storing the disk is provided, and when the disk is loaded, a display is displayed on the display unit of the slot.

(9) In the disk device of (5), a display unit corresponding to each slot for storing the disk is provided, and when the disk is inserted into the slot, a display is displayed on the display unit of the slot. .

(Operation) The operation based on the above configuration will be described. The changer 14a exchanges disks, the controller 11a instructs the changer 14a to exchange disks, and the host system 2 designates a disk device by a logical unit number through the standard interface 17a. Part 11
In a, the host system 2 instructs the changer unit 14a to switch to a disk corresponding to the logical unit number specified. For this reason, it is possible to change the disk to make it appear that there is a physically different disk drive, and when viewed from the host system, it functions as a system similar to the addition of a disk drive, resulting in space saving and low cost. Can be realized.

The disc is changed by the unitized changer mechanism controller 13, and the change of the disc is commanded to the changer mechanism controller 13 by the unitized drive 12a.
a and the changer mechanism control unit 13 are directly connected by a signal line. For this reason, by being unitized, flexibility such as upgrade of only the drive 12a and variation of only the changer mechanism control unit 13 (such as one having five or eight discs) can be provided. It is also possible to easily perform repairs in the event of a failure.

Further, the changer disc is changed by the changer mechanism controller 13, and the drive 12a instructs the changer mechanism controller 13 to change the disc, and a communication means between the drive 12a and the changer mechanism controller 13 is provided. Use RS-232C. For this reason, RS-23 which is a general-purpose serial interface
The connection between the drive 12a and the changer mechanism control unit 13 can be easily and inexpensively performed using the 2C.

Further, the logical unit number is made to correspond to a slot number in which the disk is stored. Therefore, the correspondence between the logical unit number and the disk can be easily performed.

Further, a door key for opening and closing the door of the loading / unloading section of the disk is provided. Therefore, the theft of the disk can be prevented. When the disk is loaded, the door is operated to return the disk to the slot for storing the disk, and the door is opened after the return is completed. Therefore, the user can immediately take out a necessary disk when the door is opened.

Further, an eject button is provided for each slot for accommodating the discs, and the discs are inserted / ejected one by one by operating the eject button. Therefore, it is possible to easily take out a disk that needs to be replaced.

Further, a display unit corresponding to each slot for accommodating the disk is provided, and when the disk is loaded, a display is displayed on the display unit of the slot. Therefore, the disk being loaded can be easily known.

Further, a display unit corresponding to each slot for accommodating the disk is provided, and when the disk is inserted into the slot, a display is displayed on the display unit of the slot.
Therefore, the slot in which the disc is inserted can be easily known.

[0026]

FIG. 2 to FIG. 11 are views showing an embodiment of the present invention. Hereinafter, description will be given based on the drawings. (1): Description of Optical Disk Device FIG. 2 is an explanatory diagram of the optical disk device, FIG. 2 (a) is an external view, and FIG. 2 (b) is a description of an operation surface. FIG. 3 is an explanatory diagram of the changer mechanism.

Description of External View In FIG. 2A, the optical disk device 1 has a housing 21 and a door (lid) 22 provided on an operation surface on the front surface. The size of the optical disc device 1 of this embodiment is 150 m in width.
m, height is 90 mm, and depth is 320 mm.

Description of Operation Surface FIG. 2B shows a state in which the door 22 on the operation surface of the optical disk device 1 is opened. The operation surface includes an optical disk cartridge 20, a slot 23, a cartridge eject button 24, a door key 25, and an LED (light emitting diode).
26 are provided.

The optical disk cartridge 20 is a container containing a medium for optically recording information. Slot 2
Reference numeral 3 denotes a storage for the optical disk cartridge 20, which can store up to eight optical disk cartridges 20. The cartridge eject buttons 24 are provided as many as the number of optical disk cartridges 20 that can be stored. By pressing this button, the user can take out the optical disk cartridge 20 desired by the user. That is, it is possible to insert / discharge one sheet at a time.

The door key 25 is a key for preventing the optical disk cartridge 20 from being stolen, and can be turned to the door open position to open the door 22 on the front of the apparatus. The LED 26 is a display unit provided with the number of optical disk cartridges 20 that can be stored, and when lit, indicates that the optical disk cartridge 20 in the slot is inserted into the built-in optical disk device. Even when the optical disk cartridge 20 is inserted into the slot 23, the light is turned on.

Description of Changer Mechanism In FIG. 3, the changer mechanism (changer mechanism) of the optical disk device 1 includes a built-in optical disk device 3.
0, an insertion port 31, motors 32 and 33, a pulley 34, a disk 35, and a guide rod 36 are provided.

The built-in optical disk device 30 reads / writes information from / on an optical disk (medium). The insertion opening 31 is an entrance into which the optical disk cartridge 20 is inserted into the built-in optical disk device 30. Motors 32, 33
Drives the pulley 34, the disk 35, etc., positions the built-in optical disc device 30 up and down, and carries the optical disc cartridge 20 into the built-in optical disc device 30. The guide bar 36 is a guide when the built-in optical disc device 30 moves in the vertical direction.

This changer mechanism moves the built-in optical disk device 30 up and down in accordance with an instruction from the host system, positions the insertion slot 31 at a corresponding slot position, and stores the optical disk cartridge 20 stored in the slot.
Is transported from the insertion port 31 into the built-in optical disk device 30.

(2) Description of Connection Diagram of Optical Disk Device FIG. 4 is a connection diagram of the optical disk device. FIG. 4 shows the maximum system configuration in the optical disk device. Personal computer (PC) or workstation (W
The host system 2 such as S) includes seven optical disk devices 1
Is a SCSI bus, which is connected in a manner similar to the above. Each optical disk device 1 has one ODC (SCSI ID0
6) and one ODD and optical disk cartridge 20
Are inserted (SLOT0 to SLOT7).

The host system 2 appears as if the number of optical disk devices specified by the LUN (logical unit number) of the SCSI is mounted, and
Each UN corresponds to one optical disk cartridge 20. When the optical disk apparatus 1 receives a data read / write instruction from the host system 2, it determines which LUN the instruction is for, and if necessary, replaces the optical disk cartridge 20 (disk). This is performed for the mechanical control (changer mechanical control unit) that changes the disk.

(3): Description of Configuration of Optical Disk Device FIG. 5 is a configuration diagram of the optical disk device. In FIG. 5, one optical disk device 1 is connected to the host system 2 and S
This is an example of connection by a CSI bus. The optical disc device 1 includes an ODC 11, an ODD 12, a changer mechanism control unit 13 as a changer unit, a changer mechanism unit 14, a power supply 15, connectors 16, 17, and 18, and a terminator (terminator) 19.

The ODC 11 mainly controls the SCSI interface. The ODD 12 communicates with the changer mechanism control unit 13 through a serial interface RS-232C.
In response to a designation from the controller 11, the changer mechanism controller 13 issues a command for disc change, and writes data to a medium (optical disc) and reads data from the medium. Changer mechanism controller 13
Controls the disk change. The changer mechanism section 14 is a mechanism for replacing the built-in optical disk device with the optical disk cartridge 20 in the slot. The power supply 15 supplies power to each unit in the optical disk device 1. Connectors 16, 17, 18
Is for connecting to a SCSI bus. A terminator (terminator) 19 is connected to the end of the SCSI bus. If there is another optical disk device to be connected, this terminator is removed and connected via the SCSI bus.

Since the host interface of the optical disk apparatus 1 is SCSI, it can handle up to eight optical disks by supporting LUN. The SCSI process is performed by the ODC 11, and the ODD 12 causes the changer mechanism control unit 13 to issue a command of a disk change according to the designation of the LUN from the host system 2. The ODD 12 and the changer mechanism control unit 13
It communicates through RS-232C to exchange information.

Since the command to the changer mechanism controller 13 can also be issued from the ODC 11, the RS-232C
Can be connected to the ODC 11 and the changer mechanism control unit 13.

The changer mechanism controller 13 and the OD
D12 is unitized, and the changer mechanism controller 13
And ODD 12 can be directly connected by a signal line. By being unitized in this way, flexibility such as upgrade of only the ODD 12 and variation of only the changer mechanism control unit 13 (such as one having five or eight optical disc cartridges) can be provided. Can be. Further, repair in the event of a failure can be easily performed.

(4): Description of Disk Change Processing FIG. 6 is an explanatory view of the disk change processing, FIG. 7 is an explanatory view of the changer interface, FIG. 8 is an explanatory view of commands and responses, and FIG. (1), FIG.
0 is a detailed explanatory diagram (2) of the command. Hereinafter, FIG.
The disk change process will be described with reference to FIG.

Overview of Disk Change Processing The host system 2 specifies a LUN through an Identify message of a SCSI interface message out. ODD12 (or ODC11)
The firmware section (control section) of the RS-232C sends an RS-232 to the changer mechanism control section 13 in accordance with the designated LUN.
Issue a disk change instruction through C. The changer section changes the disc and returns the status to the ODD 12.

FIG. 6A is an outline of the disk change process. Hereinafter, the sequences S1 to S in FIG.
18 will be described. S1: In arbitration, the host system 2 acquires the right to occupy the bus.

S2: Selection, host system 2
Selects the ODC 11 to be connected. S3: The host system 2 specifies a LUN to the ODC 11 upon message out (Identify).

S4: The command causes the host system 2 to execute O
The command is transferred to DC11. S5: Message In (Save Data Point)
ter), the ODC 11 requests the host system 2 to save the pointer of the data being transferred.

S6: Message In (Disconnect)
In ct), the ODC 11 notifies the host system 2 of a disconnect message. S7: Bus free, ODC 11 gives up bus occupancy,
The connection with the host system 2 is temporarily interrupted.

S8: The ODD 12 inquires the changer mechanism controller 13 about the current disk number. S9: The changer mechanism controller 13 responds to the ODD 12 with the current disk number.

S10: The ODD 12 instructs the changer mechanism controller 13 to change the disc. S11: The changer mechanism control unit 13 returns a status (completed or failed) of the disc change to the ODD 12.

S12: ODC1 in arbitration
1 acquires the right to occupy the bus. S13: In reselection, the ODC 11 selects the host system 2 disconnected in the sequence S7.

S14: Message In (Identif
In y), the LUN corresponding to the reselection is notified. S15: Data-in, the ODC 11 performs the sequence S
The data corresponding to the command No. 4 is sent to the host system 2.

S16: In the status, the ODC 11 sends the execution result of the command of the sequence S4 to the host system 2. S17: Message In (Command Compl
In Ete), the ODC 11 notifies the host system 2 of the completion of the command.

S18: Bus free, host system 2
Makes the bus free. : Correspondence between LUN and optical disk cartridge FIG. 6B is a description of the correspondence between LUN and optical disk cartridge. In the example of FIG. 6B, LUN0 corresponds to the optical disk cartridge in slot 0 of the changer mechanism section 14, LUN1 corresponds to the optical disk cartridge in slot 1 of the changer mechanism section 14, and so on.
LUN2 is the optical disk cartridge in slot 2 and L2 is
UN3 stores the LU in the optical disk cartridge in slot 3.
N4 is the LUN in the optical disk cartridge in slot 4.
Reference numeral 5 denotes an optical disk cartridge in slot 5, and LUN 6
Corresponds to the optical disk cartridge in slot 6, and LUN 7 corresponds to the optical disk cartridge in slot 7.

A description of the changer section interface a: A description of the communication conditions The communication between the ODD 12 and the changer mechanism
Performed through S-232C. For this reason, communication is performed not by bus connection but by only two lines of transmission (TXD) and reception (RXD).

FIG. 7A illustrates the communication conditions. FIG.
In (a), the signal level is RS-232C (12
V) instead of using the output of ODD 12 as a low TTL level (5 V, 3.3 V, etc.)
TS, baud rate is 4800 bits / second, character length is 8 bits, parity is odd, stop bits are 1 bit, and flow control is XON / XOF.
Use F.

B: Description of Command and Response b-1: Description of Transfer Format FIG. 7B is a description of the transfer format. Communication is usually ODD
It is assumed that the processing starts at 12. The ODD 12 issues a command, and the changer mechanism control unit 1 of the changer unit.
3 is for returning a response. The transfer format is header + command + checksum as shown in FIG. 7B.

The header is the number of transfer bytes including the header byte. The checksum is the lower one byte of the result of adding the header byte and the command byte for each byte.

B-2: Description of Commands and Responses FIG. 8 shows a list of commands from the ODD 12 and responses from the changer unit.

Reset command code 00h (h is 1
The code of the complete response is 00h, and the code of the error response is 8Xh (a detailed error code is set in X).

The ready response code for the test unit ready command code 01h is 00h, the busy response code is C0h, and the error response code is 8Xh.
(A detailed error code is set in X).

Door status command code 02h
Are 00h and XXh, the not-ready response code is 01h, and the error response code is 8Xh (X sets a detailed error code).

The code of the number response response to the code 03h of the disk number query command is 1Xh (X sets a disk number from 0 to 7), the code of the no disk response is C0h, and the code of the error response is 8Xh (X sets a detailed error code).

Code 1X of disk mount command
h (the slot number from 0 to 7 is set in X), the code of the complete response is 00h, the code of the busy response is C0h, and the code of the error response is 8Xh (a detailed error code is set in X). .

C: Detailed Description of Command FIG. 9 is a detailed explanatory view (1) of the command, and FIG. 10 is a detailed explanatory view (2) of the command. Hereinafter, description will be made with reference to FIGS.

C-1: Description of reset Command name reset is basically performed by the ODC 11
When a bus device reset is received from the I bus,
The DD 12 issues the changer mechanism control unit 13. When the changer mechanism control unit 13 receives this command, it must respond with a complete or error within the timeout period. If there is no response within the timeout period, the ODD 12 terminates the processing, recognizes that the device is in an error state, and holds the hardware error sense state. Also, when the power is turned on,
Alternatively, ODD at any timing such as when an error occurs
12 can issue this command and see if the changer section is available.

FIG. 9A illustrates the reset. FIG.
In (a), the command name reset code is 00h.
The reset operation of the changer unit is performed. The response of the changer section, complete [code: 00h], indicates that the reset operation has been completed normally. The error [code: 8Xh] indicates the end of the error, and X indicates the details of the error. The timeout time is set to 10 seconds.

C-2: Description of Test Unit Ready Command name The test unit ready is such that when the ODC 11 receives a command without data transfer from the host system 2, the ODD 12 sends the changer mechanism control unit 1.
3 When the changer mechanism control unit 13 receives this command, it does not perform the mechanical operation.

FIG. 9B illustrates a test unit ready. In FIG. 9B, the command name test
The unit ready code is 01h, and is used to inquire about the operable state of the changer unit. The response of the changer section, ready [code: 00h], indicates that operation is possible. Busy [Code: C0
h] indicates that the mechanism is in operation. An error [code: 8Xh] indicates an error state and operation is not possible, and X indicates the details of the error. The timeout time is set to one second.

C-3: Explanation of Door Status FIG. 9C is an explanation of the door status. FIG.
In (c), the command name door status code is 02h, which is used to inquire whether the door (lid) of the changer unit is open.

Response from the changer unit (changer mechanism control unit 13), ready [code: 00h, XX
h) indicates that the lid of the device is closed. This response is 2 bytes. Each bit of the second byte indicates whether or not a disk is mounted. That is, XX
Since h is 8 bits, it indicates that there is a disk corresponding to the bit of “1”. For example, when the third bit is “1”, it indicates that the optical disk cartridge is mounted in the slot 3.

The correspondence between bits and slots is as follows. The seventh bit corresponds to slot 7, the sixth bit corresponds to slot 6, the fifth bit corresponds to slot 5,
The fourth bit corresponds to slot 4, the third bit corresponds to slot 3, the second bit corresponds to slot 2, the first bit corresponds to slot 1, and the zero bit corresponds to slot 0.
Corresponding to

Response, Not Ready [Code: C0h]
Indicates that the lid of the device is open. An error [code: 8Xh] indicates an error state,
X indicates the details of the error.

C-4: Description of Disk Number Query FIG. 10A is a description of the disk number query. In FIG. 10A, the code of the command name disk number query is 03h, and the current OD
This is for inquiring about the number of the disk mounted on D12 (built-in optical disk device 30).

A response from the changer unit (changer mechanism control unit 13), a number response [code: 1X
h] is for notifying the disk number currently mounted on the ODD 12. The current disc number is entered in X of this response code (from 0 to 7).

Response, no disk [code: C0h]
Indicates that the corresponding disc is not currently mounted on the ODD 12. Error [Code: 8X
h] indicates an error state, and X indicates the details of the error.

C-5: Description of Disk Mount FIG. 10B is an explanation of the disk mount. FIG.
At 0 (b), the command name disc mount code is 1Xh, indicating that the disc is to be mounted on the current ODD 12. The slot number (0 to 7) is specified in the X portion of the command code. This command, if a disk is currently mounted on the ODD 12, returns it to its original slot before mounting a new disk.

Response from the changer section (changer mechanism control section 13), complete [code: 00h]
Indicates that the specified disk is mounted on the ODD 12 (built-in optical disk device).

The response busy (code: C0h) indicates that the changer mechanism is currently operating. An error [code: 8Xh] indicates an error state, and X indicates the details of the error.

(5) Description of User Interface As shown in FIG. 2 (b), the optical disk device has an operation panel as a user interface. The features of this operation panel are as follows.

The door key 25 is a key for preventing the optical disk cartridge 20 from being stolen. By turning the door key 25 to the door open position, the door 22 on the front of the apparatus can be opened. If the optical disk cartridge 20 is in the built-in optical disk device 30 when the door key 25 is turned to the door open position, the cartridge 20 is returned to the original slot 23 and the door 22 is opened.

The cartridge eject buttons 24 are provided by the number of optical disk cartridges 20 that can be stored. By pressing the button 24, the user can take out the optical disk cartridge 20 desired by the user. That is, the optical disk cartridge 20 can be inserted / ejected one by one.

The number of LEDs 26 is equal to the number of optical disk cartridges 20 that can be stored. The lighting of the LED 26 indicates that the optical disk cartridge 20
Is inserted into the built-in optical disk device 30. When the door is opened, the LED 26 is turned on even if the optical disk cartridge 20 is inserted into the slot 23.

FIG. 11 is a flowchart of the door open process. Hereinafter, according to the processes S21 to S24 of FIG.
The door opening process performed by the changer mechanism control unit 13 will be described.

S21: The changer mechanism control unit 13
It is determined whether the door key 25 is at the door open position. If it is determined that the door key 25 is at the door open position, the process proceeds to step S22. If the door key 25 is not at the door open position, the process ends.

S22: The changer mechanism control unit 13
The built-in optical disc device 30 has an optical disc cartridge 20
Determine if there is. If it is determined that the optical disk cartridge 20 is present in the built-in optical disk device 30, the process proceeds to step S23. If the optical disk cartridge 20 is not present, the process proceeds to step S24.

S23: The changer mechanism control unit 13
The optical disk cartridge 20 being loaded into the built-in optical disk device 30 is returned to the original slot 23, and the processing S
Move to 24.

S24: The changer mechanism control unit 13
The door is opened and this process ends. As described above, in the conventional device, in order to increase the capacity that can be simultaneously accessed (read / written) from the host system, the ODD must be physically increased. There was a problem.

In the optical disk device of the present invention, the SCSI
By having a plurality of LUNs (up to a maximum of eight) for the interface, the LUNs correspond to optical disk cartridges housed in the optical disk device housing. Therefore, when an access (read processing / write processing) is made from the host system, the changer mechanism control unit 13 is controlled by the ODD or ODC built in the optical disk apparatus housing.
To move the optical disk cartridge corresponding to the LUN specified by the host system. This makes it possible to pretend that the ODD exists physically as in the conventional device. Therefore, when viewed from the host system, it functions as a system similar to the conventional device, and can achieve space saving and low cost compared to the conventional device.

[0088]

As described above, the present invention has the following effects. (1): Change the disc in the changer section,
The controller unit issues a command to change the disk to the changer unit. The disk unit is designated by the logical unit number from the host system using a standard interface, and the controller unit corresponds to the logical unit number designated by the host system. The changer unit is instructed to switch to a changed disk, so that it is possible to change the disk and make it appear that there is a physically different disk drive. As a result, space saving and low cost can be realized.

(2): The disc is changed by the unitized changer mechanism control section, and the change of the disc is instructed to the changer mechanism control section by the unitized drive, and the drive and the changer mechanism control section are commanded. Are directly connected by signal lines, so that they are unitized to allow flexibility such as upgrade of drive only and variation of changer mechanical control unit only (with 5 or 8 disks) And repair in the event of a failure can be easily performed.

(3): The changer disk is changed by the changer mechanism controller, the drive is commanded by the drive to change the disk, and the communication means between the drive and the changer mechanism controller is RS-232.
Since the 2C is used, the connection between the drive and the changer mechanism control unit can be easily and inexpensively performed using the RS-232C which is a general-purpose serial interface.

(4) Since the logical unit number corresponds to the slot number in which the disk is accommodated, the logical unit number can be easily associated with the disk. (5): Since the door key for opening and closing the door is provided, it is possible to prevent the disk from being stolen.

(6) When a disk is loaded, the door is returned to the slot for storing the disk by operating the door key, and the door is opened after the return is completed. You can take out a new disk immediately.

(7): An eject button is provided for each slot for accommodating a disc, and discs are inserted / ejected one by one by operating the eject button, so that a disc requiring replacement can be easily taken out. it can.

(8): A display unit corresponding to each slot for accommodating a disk is provided, and when a disk is loaded, a display is displayed on the display unit of the slot, so that the disk being loaded can be easily known.

(9): A display corresponding to each slot for accommodating a disk is provided, and when a disk is inserted into a slot, a display is provided on the display of the slot, so that the slot in which the disk is inserted can be easily identified. You can know.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram of an optical disk device according to an embodiment.

FIG. 3 is an explanatory diagram of a changer mechanism in the embodiment.

FIG. 4 is a connection configuration diagram of the optical disc device in the embodiment.

FIG. 5 is a configuration diagram of an optical disc device in the embodiment.

FIG. 6 is an explanatory diagram of a disk change process in the embodiment.

FIG. 7 is an explanatory diagram of a changer section interface in the embodiment.

FIG. 8 is an explanatory diagram of a command and a response in the embodiment.

FIG. 9 is a detailed explanatory diagram (1) of a command in the embodiment.

FIG. 10 is a detailed explanatory diagram (2) of the command in the embodiment.

FIG. 11 is a flowchart of a door open process according to the embodiment.

FIG. 12 is an explanatory diagram of a conventional example.

[Description of Signs] 2 Host system 11a Controller 12a Drive 13 Changer mechanical controller 14a Changer 17a Standard interface

Claims (9)

[Claims] 1. A changer unit for changing disks, a controller unit for instructing the changer to change disks, and a standard interface for specifying a disk device by a logical unit number from a host system. The disk device according to claim 1, wherein the controller unit issues an instruction to the changer unit to switch to a disk corresponding to a logical unit number designated by the host system. 2. A unitized changer mechanism control unit for changing the disk in the changer unit, and a unitized drive instructing the controller unit to change the disk in the changer mechanism control unit. 2. The disk drive according to claim 1, wherein the drive and the changer mechanism controller are directly connected by a signal line. 3. A changer mechanism control unit for changing the disk in the changer unit; and a drive instructing the controller unit to change the disk in the changer mechanical control unit, wherein the drive and the changer mechanical control are controlled. 2. The disk device according to claim 1, wherein RS-232C is used as communication means with the unit. 4. The disk device according to claim 1, wherein said logical unit number is associated with a slot number in which said disk is stored. 5. The disk device according to claim 1, wherein a door and a door key for opening and closing the door are provided at the disk loading / unloading section. 6. The disk according to claim 5, wherein when the disk is loaded, the door is returned to a slot for storing the disk by operating a door key, and the door is opened after the return is completed. apparatus. 7. The disk device according to claim 5, wherein an eject button is provided for each slot for accommodating the disks, and the disks are loaded / discharged one by one by operating the eject button. 8. The disk device according to claim 5, wherein a display unit corresponding to each slot for storing said disk is provided, and when the disk is loaded, a display is displayed on the display unit of the slot. 9. A disk according to claim 5, wherein a display corresponding to each slot for storing said disk is provided, and when said disk is inserted into said slot, a display is displayed on the display of said slot. apparatus.