JP2000285566A - Library device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reliably recover even if a failure falls into a state in which a medium cannot be ejected, reduce the failure rate when a general-purpose drive is mounted, and improve reliability. An accessor control unit provided with a function of forcibly restoring a drive in which an error has occurred to a normal state when an error in which a medium inserted in the drive cannot be ejected is detected. For example, the accessor control unit 62 restores the power of the drive in which the error has occurred by turning the power off and then on again. The recovery control unit 62 resets and restarts the drive 36 when detecting an error that the medium of the drive 36 cannot be ejected by using the reset function of the interface or the reset function built into the drive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a library apparatus for accommodating a large number of media such as optical disk cartridges capable of recording and reproduction, taking out necessary media with an accessor, transporting the media to a drive, and recording / reproducing the media. The present invention relates to a library device that performs recovery control for recovering an error state that cannot be ejected.

[0002]

2. Description of the Related Art Conventionally, a library device can be used to make a large-capacity storage device at a low cost, so that it can be used as a backup or used online as a hard disk storing a huge amount of data such as image data. Is done.

In such a field of use, since it is used by being connected to a computer center, a server, or the like, higher reliability is required as compared with personal use in a general personal computer. The reliability of the library device can be dramatically improved not only by removing the cause of the failure but also by considering a recovery method for promptly and surely recovering from the failure.

[0004] Such a library device is known, for example, from Japanese Patent Application Laid-Open No. 8-36823. In this library device, when the accessor control unit receives a move command for transporting a medium from a cell to a drive from an upper host, the accessor transports the medium from the cell to the drive and inserts it.

[0005] At this time, if a notification of the completion of insertion is not obtained from the drive, the accessor requests the drive to eject the medium, and performs recovery by inserting the medium again after ejecting the medium.

After issuing the move command, the host computer issues a write command or a read command to the drive in order to access the recording medium inserted in the drive. At this time, SCS
When an error of the command is reported through the I interface, the host computer performs recovery by reissuing the command having the error to the drive.

As described above, each of the accessor control unit and the higher-level host performs recovery for the occurrence of a failure in the library device, thereby reducing the failure rate.

[0008]

However, in a case where the drive cannot be ejected by the conventional recovery method or a case where the drive cannot be recovered by reissuing the command, recovery cannot be performed. It can't be done and there is no point in doing it.

[0009] Such a failure that an unrecoverable drive falls into a state in which the medium cannot be ejected is always present because the failure is accidental, and a very frequent occurrence that cannot be found at the time of device development. Induced by few bugs. Furthermore, static electricity generated when a medium is inserted into a drive may cause a failure state in which the medium cannot be ejected.

In such a failure situation, in recent years, in order to reduce the cost of a drive incorporated in the library device, a highly reliable drive dedicated to the library device has not been developed, and a low-cost personal computer drive has been mounted on the library device. It tends to increase under the influence of the fact that it has started.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and it is possible to reliably recover even in a failure state where a medium cannot be ejected, reduce the failure rate when a general-purpose drive is mounted, and reduce the reliability. It is an object of the present invention to provide a library device with improved operability.

[0012]

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

First, the library device of the present invention is shown in FIG.
(A) As shown in FIG.
and a drive unit 36 for recording and reproducing data on and from a medium based on an instruction from the host 11, and an accessor 30 for transporting the medium between the cell unit 18 and the drive 36. Is done.

According to the present invention, an accessor control having a function of forcibly restoring the drive 36 in which an error has occurred to a normal state when an error is detected when the accessor 30 inserts a medium into the drive 36 is provided. It is characterized in that a part 62 is provided.

The accessor control section 62 turns off the power of the drive 36 in which the error has occurred and then turns it on again to restore the drive. For this reason, the accessor control unit 60 includes a power control unit 64 that controls the turning on and off of a power supply unit 66 provided for each drive 36, and a power control unit that detects an error when the accessor 30 inserts a medium into the drive 36. In response to the instruction of the recovery operation with respect to the
And a recovery control unit 62 for recovering the power by turning the power off and on again.

In particular, the recovery control unit 62
When the medium ejection failure error in which the medium cannot be ejected is detected, the power supply control unit 64 is instructed to perform the recovery operation.

When the recovery control unit 62 detects a medium ejection failure error of the drive 36, it instructs the drive 36 to eject the medium and then instructs the accessor 30 to re-insert the medium to perform the restore operation. If the error cannot be recovered, the power supply control unit 64 is instructed to perform a recovery operation.

As described above, when the medium is loaded into the drive and the drive is inserted, the power supply is turned off and on for the drive in which the error that cannot be recovered by the normal retry operation has occurred.
Since the drive can be restarted, it is possible to reliably recover even in a case where the medium cannot be ejected.

The recovery control unit 62 instructs the power supply control unit 64 to perform a recovery operation of the drive 36 based on a recovery instruction from the host 11. In this case, the recovery control unit 62
Executes a retry operation by an accessor for medium conveyance and loading or ejection to the drive 36 in which an error is detected based on a retry instruction from the host 11, and based on a recovery instruction from the host 11 after the failure of the retry operation,
Instructs the power supply control unit 64 to perform a recovery operation.

For this reason, when the host accesses the drive in which the error has occurred, the power supply of the drive can be instructed to be turned off and on again by the host via the accessor, and the medium cannot be recovered even by reissuing the command. The recovery can be reliably performed even in the case where the discharge cannot be performed.

Furthermore, by providing a power supply control unit for controlling turning on and off for each drive and performing recovery control, even if the drive of the library device is changed to another model without being restricted by the interface of the drive. Can be replaced.

In another embodiment of the present invention, FIG.
As described above, the accessor control unit 62 is characterized in that it is restarted and restored by the reset operation of the drive 36 in which the error has occurred.

In this case, the accessor control section 60 is provided for each drive 36 and outputs an interface 52 reset signal to the drive 36 to the interface reset circuit section 94 and the interface reset circuit section 94 to the drive 36. A reset control unit 92 that outputs a reset signal and the accessor 30
And a recovery control unit 62 for turning on and off the reset signal for the drive in which the error has occurred and recovering the error by instructing the reset control unit 92 to perform a recovery operation when an error is detected.

For this reason, when a plurality of drives are connected in a daisy chain like a SCSI interface or the like, the reset signal is turned on and off for a specific drive in which an error has occurred by using an interface reset function. Re-starting can be performed and recovery can be reliably performed even in a case where the medium cannot be ejected.

Further, since the reset signal provided on the existing interface is used, recovery control by the reset signal can be easily realized without adding a new function to the drive.

In still another embodiment of the present invention, FIG.
As shown in (C), on the premise that the drive 36 includes a reset circuit 104 based on an external reset signal, the accessor control unit 60 includes a reset control unit 92 provided for each drive 36 and an accessor 30 that controls the medium. A recovery control unit 62 is provided to turn on and off a reset signal for the drive 36 in which an error has occurred in order to recover the drive 36 in accordance with an instruction for a recovery operation to the reset control unit 92 when an error is detected when the drive 36 is inserted into the drive.

In this case, in addition to the SCSI interface from the host to the drive, etc., the reset signal is directly turned on and off for the specific drive in which the error has occurred.
It can be turned off and restarted, and even in a case where the medium cannot be ejected, recovery can be reliably performed. Since the reset function originally provided in the drive is used, the hardware configuration on the library device side can be simplified and the cost can be reduced.

Here, the recovery control unit 62
6. If an error is detected that prevents the medium from being ejected from 6,
After instructing the drive 36 to eject the medium, the accessor 30
When a medium-out error is detected after the restore operation, the reset control unit 92 is instructed to perform a recovery operation.

The recovery control unit 60 can also instruct the reset control unit 92 to perform a recovery operation based on a recovery instruction from the host 11 in both cases of using the reset function of the interface and directly resetting. .

Therefore, when the host accesses the medium of the drive in which the error has occurred, the drive in the error state can be restarted by turning on and off the reset signal via the accessor. Even if you fall into the impossible state, you can reliably recover.

[0031]

FIG. 2 is an external view of a library device according to the present invention. The main body 10-1 of the library device 10 has a box shape, and has a size that can be set, for example, below a sleeveless disk. An operation panel display section, a message display section, various display lamps, and operation switches are provided on an upper front portion of the apparatus main body 10-1. A charging / discharging door 14 is provided below the operation panel 12.

The loading / unloading door 14 is opened when a door open switch of the operation panel 12 is operated, and a cartridge 16 containing a medium is inserted with the door opened. For example, an optically readable / writable optical disk is stored in the cartridge 16 as a medium.

Below the loading / discharging door 14, a cartridge storage section 18 having a door is provided. The cartridge storage unit 18 is used by an operator to store a cartridge to be inserted into the library device 10 or a cartridge discharged from the library device 10.

FIG. 3 shows the internal structure of the library apparatus 10 according to the present invention, in which the case of the apparatus main body 10-1 is cut away. Inside the apparatus main body 10-, a cell drum 1 functioning as a cell unit for storing a cartridge is provided.
8 are arranged. The cell drum 18 rotates horizontally around the belt driven by the motor 20. Cell drum 18
, Cells for storing the cartridges 16 are arranged in the vertical direction.

A charging / discharging section 22 is provided coaxially above the cell drum 18. The charging / discharging section 22 is a rectangular member, and has a tray 26 for storing the cartridge 16 at both ends.
1, 26-2. The charging / discharging section 22 has its center connected to a rotating shaft above the cell drum 18 via a clutch section 26. When the connecting operation of the clutch unit 24 is performed, the charging / discharging unit 22 rotates integrally with the cell drum 18. When the disengagement operation of the clutch unit 24 is performed, the charging / discharging unit 22 is stopped even when the cell drum 18 rotates.

An accessor 30 is arranged beside the cell drum 18. The accessor 30 is provided to be able to move up and down along a rail 38. A motor 32 is provided below the rail 38, and transmits the rotation of the motor 32 to the timing belt 35. Timing belt 35
Is a belt whose upper part is broken but formed in a loop shape, is fixed to the side surface of the accessor 30, and has a balance weight 34 attached to the opposite side. Therefore, by rotating the timing belt 35 by the motor 32, the accessor 30 can be moved up and down along the rail 38.

The cartridge 1 is located below the cell drum 18.
Drives 36-1 and 36-2 for performing recording and reproduction of No. 6
Is installed. In this embodiment, two drives 36-1 and 36-2 are provided, but the number of drives can be increased as needed.

When the operator inserts the cartridge 16 with the input / output unit 14 opened, the input cartridge 16 is stored in the receiving tray 26-1 located on the operator side of the input / output unit 22. After the cartridge has been inserted, the cell drum 18 and the input / output unit 22 are connected by the clutch unit 26, and the input / output unit 22 is rotated integrally with the cell drum 18 by the rotation of the motor 20 to a position toward the accessor 30 rotated 180 °. I do.

When the rotation of the charging / discharging section 22 is completed, the clutch section is disengaged. Subsequently, the accessor 30 moves up to the removal position of the loading and discharging unit 22, and removes the loaded cartridge. At this time, the cell drum 18 is rotated such that the position of the cell row including the cell to be charged is toward the accessor 30.

When the rotation of the cell drum 18 is completed, the accessor 30 moves to a specific cell position in the cell row facing the accessor 30, and puts the held cartridge into a target cell. Thus, a series of cartridge loading processes for the cell drum 18 from outside is completed.

The cartridge is loaded into the drive 36-1,
36-2. In some cases, the cartridge is moved between the cell drum 18 and the drives 36-1 and 36-2. Furthermore, the cell drum 1
The ejection of the cartridge from the drive 8 or the drives 36-1 and 36-2 to the outside is the reverse of the loading operation.

FIG. 4 is an explanatory diagram of the loading and unloading of the cartridge 16 to and from the drive 36-1 by the accessor 30 built in the library apparatus 10 of FIG.

FIG. 4A shows that the accessor 30 is located at a position facing the drive 36-1 located below the cell drum.
Is moved and stopped, and the cartridge 16 is already loaded in the drive 36-1.

The accessor 30 has a built-in picker 40 for holding the cartridge 16. The picker 40 has a slider 42, and the slider 42 can move in the left-right direction by a belt 46. The belt 46 has pulleys 48 at both ends,
50, and the belt 46 has a slider 42
Are connected at one point, for example, the belt 46 moves forward by right rotation and retreats by left rotation. Picker arms 44-1 and 44-2 are mounted on both front sides of the slider 42 so as to be freely opened and closed.

When it is desired to take out the cartridge 16 inserted into the drive 36-1 by the picker 40 of the accessor 30 in the state shown in FIG. 4A, the slider 42 is advanced by rotating the belt 46 clockwise, and the slider 42 is moved forward. As shown in B), the picker arms 44-1 and 44-2 are pushed into both sides of the cartridge 16 projecting from the drive 36-1, and the claw inside the tip of the picker arm 44-1 is fitted into the fitting groove of the cartridge 16.

By rotating the belt 46 counterclockwise in a state where the cartridge 16 is gripped by the picker arms 44-1 and 44-2, the slider 42 retreats and the drive 36
-1 and the accessor 30
Can be held.

On the other hand, when the cartridge 16 held in the picker 40 of the accessor 30 is inserted into the drive 36-1, the belt 46 is rotated rightward while holding the picker 40 as shown in FIG. The cartridge 16 is advanced into the drive 36-1, and the picker arms 44-1 and 44-2 are opened outward in this state. In this state, the belt 46 is rotated left and the picker 40 is retracted.

FIG. 5 is a block diagram of the first embodiment of the present invention in which an error such that the cartridge cannot be ejected from the drive is recovered by turning off and on the power.

In FIG. 5, the library device 1 of the present invention
0 is connected to the host 11 by a SCSI input connector 54 via a SCSI interface bus 52, for example.
The SCSI interface bus 52 is connected to the library device 10
Through the SCSI output connector 56
Other devices 74 and 75 are provided by the interface bus 52.
Is also connected.

The library device 10 is provided with, for example, two drives 36-1 and 36-2, an accessor 30 is provided for the drives 36-1 and 36-2, and the cells 18 of the cell drum 18 are provided. The cartridge is moved between -1 to 18-n. Accessor 30 is motor 3
The driving of the timing belt 35 by the second 2 causes the cell drum 18
Then, positioning with respect to the drives 36-1 and 36-2 is performed.

To control the accessor 30, the library device 10 is provided with an accessor control unit 60. The accessor control unit 60 is connected to the internal SCSI interface bus 55 together with the drives 36-1 and 36-2, and specifies the cell drum 18 of the cartridge based on a cartridge move command (hereinafter referred to as “move command”) from the host 11. Cell and drive 36-1, 36-2
Control movement.

Here, the accessor control unit 60
The operation when a move command is received from is as follows.

First, the move command from the host 11 is:
It has a source address and a destination address as command parameters. The destination and source addresses are
A cell address previously allocated to each of the cells 18-1 to 18-n of the library device 10, the drives 36-1 and 36-2, and the accessor 30 is used.

The move command from the host 11 includes a specific cell of the cell drum 18 from the drives 36-1 and 36-3.
-2, and a move command for ejecting the cartridge from the drives 36-1 and 36-2 and returning the cartridge to the specific cell of the cell drum 18.

For example, the operation by the accessor control unit 60 of the move command for moving the cartridge from the specific cell of the cell drum 18 to the drive 36-1 is performed in four steps of the following From operation, select operation, To operation, and restore operation. Will be

From operation When a move command for a cartridge from the host is received, the cell drum 18 is rotated to a position where the cell row of the cartridge including the source address is directed to the accessor 30, and at the same time, the accessor 30 is also driven up and down to drive the cell drum 18 The accessor 30 is positioned at the position of the original cartridge storage cell.

Select Operation The picker of the accessor 30 is driven as shown in FIGS. 4A and 4B to take out the cartridge and hold it in the accessor 30.

To operation The accessor 30 holding the cartridge is driven, and the drive 36-1 or 36-, which serves as a destination cell address, is driven.
Move to 2.

Restore Operation The picker of the accessor 30 is driven to move the cartridge to the drive 36-1 or 36-
Insert into 2.

The host 11 that has issued the move command
The status of the accessor control unit 60 is checked, and if the completion status is confirmed before the timeout of a predetermined time, a command for writing or reading data to or from the drive 36-1 or 36-2 in which the cartridge is inserted, That is, a write command or a read command is issued.

When the writing or reading of the cartridge by the host 11 is completed, the host 11 issues a move command for returning the cartridge to a specific cell of the cell drum 18 from the drives 36-1 and 36-2, and the accessor 30 drives the drive 36. -1 or 36-2 from position, drive 36-1 or 36-2
Then, the accessor 30 is moved to the cell drum 18 while the picker is driven to pick up and hold the cartridge. At the same time, the cell drum 18 is driven to rotate and the storage cell is turned to the accessor 30 side.
Operation to position the cell in the storage destination cell, and finally, a restore operation for driving the picker of the accessor 30 to insert the cartridge into the cell to which the cell drum 18 is moved.

Further, as shown in FIG. 3, the cartridge 16 is moved from the charging / discharging section 14 to the cell drum 18 or the drive 3.
The operation of moving the cartridge to 6-1 or 36-2, or the operation of directly moving the cartridge from the cell drum 18 or the drives 36-1 and 36-2 to the charging / discharging door 14 is performed in the same manner.

The accessor control unit 60 and the drive 36-
The drive interface bus 72-
1, 72-2, and can exchange control signals and detection signals.

In such a library device 10 according to the first embodiment of the present invention, the accessor control unit 60
A recovery control unit 62 and a power control unit 64 are provided in the drive units 36-1 and 36- for power control for recovery.
Drive power supply units 66-1, 66-2 individually corresponding to
Is provided. Therefore, an accessor power supply unit 68 is provided independently for the accessor 30.

When the accessor 30 detects an error that the medium cannot be ejected when the accessor 30 inserts the cartridge into the drive 36-1 or 36-2, the recovery controller 62 instructs the power supply controller 64 to perform the recovery operation and causes an error. The recovery control is performed to turn the drive 36-1 or 36-2 off and on again.

The power control unit 64, which has received a recovery operation instruction from the recovery control unit 62,
In this case, the power supply control signal E11 is output to the drive power supply unit 66-1, and the power supply to the drive 36-1 is cut off and then turned on again, so that the medium cannot be ejected. The drive 36-1 causing the error is restored by turning on the power again.

If an error has occurred such that the drive 36-2 cannot eject the medium, the power control unit 64 sends a power control signal to the drive power unit 66-2 in response to a recovery operation instruction from the recovery control unit 62. E12 is output, and the error is recovered by turning off and on the power of the drive 36-2 that also has the error.

Recovery control unit 6 of accessor control unit 60
2 detects that the drives 36-1 and 36-2 cannot eject the medium in the drive interface bus 72-1,
It can be recognized by lock signals E21 and E22 indicating the detection of the cartridge sent from 72-2.

That is, the accessor 30 is connected to the drive 36-
When a cartridge is loaded into the drive 1, 36-2, the drive 3
When the cartridge insertion is normally detected by a sensor built in 6-1 or 36-2, for example, by an optical switch that is turned off when a cartridge is inserted, the accessor control unit 6
The lock signals E21 and E22 for 0 are turned on, and the normal insertion of the medium can be recognized by the accessor control unit 60.

However, the drives 36-1 and 36-
Even if a cartridge is loaded into the 2 by the accessor 30,
Lock signals E21 and E22 indicating that a cartridge has been detected may not be turned on due to the influence of static electricity or the like. In this case, the recovery control unit 62 can recognize an error in the drives 36-1 and 36-2 because the lock signals E21 and E22 are not turned on even when the medium insertion is instructed.

In this case, the recovery control unit 62 sends an ejection signal to the drives 36-1 and 36-2 before the power supply control unit 64 controls the power supplies to the drives 36-1 and 36-2 to perform recovery control by turning off and on the power. E31, E
32 to turn on the cartridge 32 to perform a cartridge ejecting operation, perform a select operation of picking up a cartridge from the drive 36-1 or 36-2 by the accessor 30, and then reinsert the cartridge into the drive 36-1 or 36-2. Do.

If the lock signals E21 and E22 indicating the detection of the cartridge are not turned on, the drive 36-1 in which an error has occurred is controlled by the power supply controller 66-1 and 66-2. , 36-
Then, recovery control is performed in which the power supply to the power supply 2 is turned off and then turned on again.

The recovery control unit 62 of the accessor control unit 60 also receives the power supply control unit 64 when receiving a recovery command from the host 11 for powering off and powering on again.
Of the drive power supply 66-
1, 66-2, the power supply to the drives 36-1 and 36-2 is cut off, and then a recovery operation of turning on the power again is performed.

That is, in the host 11, the drive 36
After a cartridge is inserted into the -1 or 36-2 by a move command, a read command or a write command is issued.

However, at this time, the drives 36-1 and 36-3
-2, if the status response recognizes that the medium is inserted but the lock signal indicating the cartridge detection is not turned on due to the influence of static electricity or the like from the status response, the read command or the write command is reissued and the drive side If the error is not resolved, a recovery command for recovery control, that is, an instruction to turn off and on the power supply, is issued to the accessor control unit 60 of the library device 10.

Based on the recovery command from the host 11, the recovery control unit 62 and the power supply control unit 64 of the accessor control unit 60 control the drive power supply units 66-1 and 66-2 on the drive in which the error has occurred. Then, the power supply to the drives 36-1 and 36-2 is cut off and turned on again to restore the drives.

After that, the host 11 reissues the read command or the write command, the error that the medium cannot be ejected by the recovery operation is resolved, and the status response of the ON state of the lock signal indicating the cartridge detection is normally obtained. For example, an access based on a read command or a write command is executed assuming that the error has been resolved by the recovery operation.

If the error state cannot be recovered by reissuing the read command or the write command after performing the recovery operation in response to the power-off / power-on instruction, it is determined that the drive has failed and the operation is abnormally terminated.

FIG. 6 is a block diagram of a hardware configuration of the accessor control unit 70 of FIG.

In FIG. 6, an MPU 76, a ROM 78, a RAM 80, a drive I
An F circuit 82, a SCSI protocol controller 84, a motor drive circuit 86, a tacho counter circuit 88, and a power supply control circuit 90 are provided. The MPU 76 is a control unit that performs arithmetic processing, executes a control program stored in the ROM 78, and stores control information in the RAM 80 as needed.

The move command for moving the cartridge issued from the host computer is transmitted to the SCSI protocol controller 8 through the internal SCSI interface bus.
4, based on the command parameters of the move command, that is, the source cell address and the destination cell address, the MPU 76 operates the accessor 30 to transport the cartridge, that is, the From operation, the select operation, the o operation,
The transport operation is performed in four stages of the restore operation.

In the To operation of moving the cartridge by the accessor to the position of the drive in the transport operation, the motor 32 driven by the motor drive circuit 86
While the tach counter 88 recognizes the movement distance of the accessor 30 due to the rotation of the, the control for positioning the accessor 30 at the cartridge insertion position of the drive is performed.

If the accessor 30 is the drive 36-1 or 3
When it is positioned at 6-2, the drive interface circuit 72-1 and 72-2 from the drive IF circuit 82 perform drive status confirmation and control instructions, and perform an operation of inserting or ejecting a cartridge into or from the drive.

In such a hardware configuration of the accessor control unit 60, the function of the recovery control unit 62 and the function of the power supply control unit 64 shown in FIG.
8 is executed by executing the control program.

FIG. 7 is a flowchart of a recovery process by the accessor control unit 60 in the first embodiment of FIG. First, in step S1, when the restore operation of inserting the cartridge as a medium into the drive 36-1, for example, by the accessor 30 is completed, the process proceeds to step S2.
To check whether the lock signal E21 serving as a medium detection signal from the drive 36-2 is on. This lock signal E
If 21 is in a normal ON state indicating medium detection, a series of medium transport processing is terminated normally.

At this time, if the lock signal E21 indicating the detection of the cartridge is not turned on due to the influence of static electricity or the like even though the cartridge is inserted into the drive 36-1, the process proceeds to step S3, where 1 to turn on an ejection signal E31 for instructing ejection of the medium.

For this reason, the drive 36-1 returns to step S
An ejection operation is performed to eject the cartridge that has been inserted in step 1. At this time, since the lock signal E21 indicating the medium detection has been turned off due to the error, the process proceeds to step S5, where the eject signal E21 is turned off as an instruction to end the medium discharge to the drive 36-1.

Next, in step S6, a select operation for picking up the medium ejected from the drive 36-1 is performed by the accessor 30, and then in step S7, the cartridge is again inserted into the drive 36-1 in which the error has occurred in the accessor 30. Perform a restore operation.

In the retry operation by ejecting and reinserting the medium, if a temporary failure occurs, a lock signal E indicating that the medium has been detected is output.
If 21 is off, the lock signal E21 indicating medium detection from the drive 36-1 is turned on by re-insertion of the cartridge, and the medium conveyance ends normally when retry succeeds.

However, if the lock-on signal 21 indicating the detection of the medium is off even after the medium is ejected from the drive 36-1 in which the error has occurred and re-inserted, the process proceeds to step S9, and the error has occurred. Drive 36-1
The power signal E11 is turned off to cut off the power supply to.

Subsequently, in step S10, the power signal E11 which has been once turned off is turned on so as to be turned on again. The power supply to the drive 36-1 causing the error in steps S9 and S10 is cut off and turned on again,
The lock signal E21 that has been turned off due to the influence of static electricity or the like is turned on upon detection of the insertion of the cartridge during the initialization process by turning on the power again.

For this reason, in step S11, after the power is turned off and on again, the lock signal E21 indicating the detection of the medium from the drive 36-1 is checked. If the lock signal E21 is on, the medium conveyance is terminated normally. If the lock signal E21 indicating the detection of the medium from the drive 36-1 remains off without being turned on even after the power is turned off and on, the drive 36-1 cannot be recovered by the control of the power supply. Judge that a failure has occurred, terminate abnormally, and perform necessary error processing.

FIG. 8 is a flowchart of a recovery process based on a command from the host 11 in the accessor control unit 60 of FIG.

In the library apparatus shown in FIG.
A read command is issued as in step S1 with the cartridge inserted in 6-1. Subsequent to the issuance of the read command, it is checked in step S2 whether a drive error has been detected.

The error detection of the drive in this case may be, for example, a timeout of the command end status for the read command, or a case in which the lock signal E21 for detecting the cartridge insertion in the drive is not turned on and an error that the medium cannot be ejected occurs. It is.

When an error in the drive is detected in step S2, the process proceeds to step S3, where a read command is reissued, and in step S4, error detection of the drive 36-1 is checked. If an error is detected in the drive 36-1 for the second read command reissue, the power off / on instruction is issued to the accessor control unit 60 as a recovery command in step S 5.

The accessor control unit 60 that has received the recovery command for instructing power-off and power-on turns on at step S
At 101, the power signal E11 for turning off the power of the drive 36-1 causing the error is turned off, and then at step S102, the power of the drive 36-1 causing the error is turned on again. Power signal E11
Is turned on, and a power-off / power-on completion report is made to the host 11 in step S103.

In response to the completion report from the accessor control unit 60, the host 11 reissues the read command in step S6, and if no error is detected in the drive 36-1 in step S7, the host 11 normally executes a series of recovery processing. End.

However, if the error of the drive 36-1 has not been recovered by the recovery control by turning off and on the power, the drive 36-1 is regarded as having a failure that cannot be solved by turning on the power again and abnormally terminated. And

Although the case where a read command is issued from the host 11 is taken as an example in the flowchart of FIG. 8, the same applies to the case where a write command is issued.

FIG. 9 is a block diagram of a second embodiment of the recovery control in the library apparatus according to the present invention. In the second embodiment, a drive error is recovered using a reset function of the SCSI interface. It is characterized by doing so.

In FIG. 9, the accessor control unit 60 is provided with a recovery control unit 62 as in the first embodiment. The recovery controller 62 determines that a drive error has occurred when the lock signals E21 and E22 obtained when the accessor 30 inserts a cartridge into the drives 36-1 and 36-2 are not turned on.
A select operation and a restore operation for ejecting and reinserting the cartridge from the cartridge 36-2 are performed.
-1 and 36-2 are reset-controlled to perform a recovery process for recovering an error.

The drive 3 by the reset control unit 92
In the second embodiment, reset circuits 94-1 and 94-2 provided on a SCSI interface bus are used for reset control of 6-1 and 36-2.

FIG. 10 is a circuit diagram of the reset circuit section 94-1 provided in the library device 10 of FIG. A reset line 98 is included in the SCSI interface bus 52 in the library device 10, and a reset circuit 94-
1, a bus connection is made to the drive 36-1 side.

The reset circuit 94-1 is connected to the SCSI bus 5
The reset control line 98-1 branched from the reset control line 98 in 2 is input to one of the OR circuits 100. The other input of the OR circuit 100 includes a drive-only reset control line 96-1 from the accessor control unit 60 in FIG.
Is connected.

For this reason, the OR circuit 100 sets the reset signal E51 from the reset control line 98-1 of the SCSI interface bus 52 or the drive-specific reset control line 9
When receiving any one of the reset signals E41 from 6-1, the reset signal E61 is output to the reset control line 98-2 on the SCSI interface bus side of the drive 36-1.

The reset circuit 94-1 of FIG. 11 is the same as the reset circuit 96-2 of the drive 36-1 of FIG. 9, and the reset signal E21 from the accessor control unit 60 is reset by the reset circuit unit 94-2. The drive 36-2 is supplied to the drive 36-2 as a reset signal of the SCSI interface bus, and a reset operation on the drive side is performed based on the interface reset signal.

FIG. 11 is a circuit diagram of a hardware configuration of accessor control unit 60 in FIG. The accessor control unit 60 includes an MPU 76, a ROM 78, a RAM 80, a drive IF circuit 82, a SCSI protocol controller 8
4, comprising a motor drive circuit 86 and a tacho counter 88;
This is the same as the first embodiment in FIG. In addition, in FIG. 11, a reset control unit 92 is provided.
6-1 and 96-2 reset signals E41 and E42.
Can be output.

FIG. 12 is a block diagram of the second embodiment shown in FIG.
9 is a flowchart of a recovery process by an accessor control unit using a reset function of a CSI interface. In the flowchart of FIG.
The processing up to S8 is the same as the processing of the first embodiment in FIG.

In step S8, the drive 36-
If the lock signals E21 and E31 indicating the detection of the medium are not turned on in a state where the cartridge is re-inserted into the cartridges 1 and 36-2, the drive dedicated to the reset circuits 94-1 and 94-2 of the SCSI interface bus in step S9. The reset signals E41 and E42 are turned on, and step S1
At 0, a recovery operation for turning off the reset signals E41 and E42 is performed.

When the reset signals E41 and E42 are turned on,
If the errors of the drives 36-1 and 36-2 in which the medium cannot be discharged can be recovered by turning off, the lock signals E21 and E31 indicating the detection of the medium from the drives 36-1 and 36-2 are turned on in step S11. , And ends normally when the recovery is successful.

If the lock signals E21 and E22 from the drive are not turned on even when the reset signal is turned on and off, it is assumed that a failure that cannot be recovered by the reset signal on / off control has occurred on the drive side. Terminate abnormally.

FIG. 13 is a flowchart of a recovery process by issuing a reset instruction for recovery control, that is, a reset command from the host 11 in the second embodiment of FIG.

Referring to FIG. 13, the host 11
The processing of steps S1 to S4 and steps S6 and S7 is the first processing in FIG.
This is the same as the embodiment, except that the host 11 issues a reset command to the accessor control unit 60 to perform a reset instruction for recovery control in step S5.

The accessor controller 60 turns on the reset signals E41 and E42 for the drives 36-1 and 36-2 based on the reset command from the host 11 in step S101, and then turns on the drive 36- in step S102. 1, 36-2, a reset signal E41,
E42 is turned off, a reset completion report is sent to the host 11 in step S103, and a recovery operation by reset control is performed.

According to the recovery operation using the reset function of the SCSI interface, the drive 36-
There is no need to provide a dedicated reset circuit on the 1, 36-2 side, and the circuit configuration on the drive side can be simplified accordingly.

FIG. 14 shows an error of a drive in a state where the medium cannot be ejected which cannot be recovered by the retry operation.
FIG. 11 is a block diagram of a third embodiment of the present invention that performs recovery using a drive-dedicated reset function.

In FIG. 14, the accessor control unit 62 provided in the library device 10 is provided with a recovery control unit 62 and a reset control unit 92, and these functions are the same as those in the second embodiment shown in FIG.

That is, after the cartridge is inserted into the drives 36-1 and 36-2 by the accessor 30, the lock signals E21 and E31 indicating the medium detection obtained via the device interface buses 72-1 and 72-2 are off. In this case, the drive 36-1, 3
Recovery control for resetting the error by resetting 6-2 is performed.

In the third embodiment, the drive 3
6-1 and 36-2 themselves have a dedicated reset circuit 104-
1, 104-2 is provided in advance. The drive 36 corresponds to the reset circuits 104-1 and 104-2.
-1 and 36-2 each include an accessor control unit 62
And dedicated drive reset terminals 102-1 and 102-2 for inputting a reset signal from the device. FIG.
The hardware configuration of the accessor control unit 60 of FIG.
Is the same as the second embodiment.

Further, the recovery process by the accessor control unit 60 is the same as the flowchart of the second embodiment in FIG. 12, and reset signals E41 and E42 to be turned on and off in steps S9 and S10 are directly transmitted to the drive 36-.
1, 36-2.

Further, the recovery process in response to the reset instruction from the host 11 is the same as the flowchart of the second embodiment in FIG. 13. In response to the reset instruction from the host, the accessor control unit 60 executes step S10.
1, in that reset signals E41 and E42 output in S102 are directly supplied to the drives 36-1 and 36-2.

As described above, when the dedicated reset circuits 104-1 and 104-2 and the drive reset terminals 102-1 and 102-2 are provided in the drives 36-1 and 36-2 themselves, the configuration shown in FIG. To recover an error on the drive side such that the medium cannot be ejected by directly turning on / off a reset signal for recovery control from the accessor control unit 60 without using the reset function of the SCSI interface as in the embodiment. Can be.

In the above embodiment, the case where the library device is connected to the host by the SCSI interface is taken as an example. However, another appropriate interface may be used. Further, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the embodiments.

[0125]

As described above, according to the present invention, in a case where the drive built in the library device is in a state where the medium cannot be ejected, or when the host issues a command again, it is restored. Even in the case where the drive cannot be operated, the error that the media cannot be ejected by restarting the drive by the power-off and restart of the drive, the reset function of the SCSI interface, and the reset function of the drive. Recovery for recovering a drive that has fallen into a normal state can be reliably performed.

By guaranteeing the recovery function of such a drive, even if a low-cost drive used in a general personal computer is built in the library device, the drive can be built in the library device. Reliability can be sufficiently improved.

Further, according to the present invention, since recovery for recovering an error is performed by power supply control provided by a separately provided power supply unit for an error state of the drive, it depends on the interface of the drive used in the library device. Therefore, even if the drive is changed to another drive, the recovery control can be easily performed.

Further, by making it possible to perform reset control for recovering the drive from the accessor control unit using the reset function realized by the interface of the drive, an exclusive reset circuit is not required on the drive side. The structure can be simplified and the cost can be reduced.

Further, since the drive used for the library device may have a built-in reset function in some cases, a reset signal for error recovery is supplied directly from the accessor control unit to the drive in this case. By doing so, the hardware configuration of the library device can be simplified, and the cost can be reduced when a drive with a dedicated reset function is used.

Incidentally, the present invention further includes the following modes. (1). 4. The library apparatus according to claim 3, wherein the recovery control unit, when detecting an error that the drive cannot eject the medium, instructs the drive to eject the medium, and then instructs the accessor to re-insert the medium, and performs a restore operation. A library apparatus for instructing a power supply control unit to perform a recovery operation when an error cannot be recovered by a restore operation. (2). In the library device according to (1), the accessor control unit is provided for each drive, and outputs an interface reset signal to the drive via an interface reset circuit unit and an interface reset circuit unit. A reset control unit that outputs a reset signal to the drive; and, when an error is detected when the accessor inserts a medium into the drive, a reset signal for the drive in which the error has occurred is turned on / off by a recovery operation instruction to the reset control unit. And a recovery control unit for recovering the data. (3). In the library device described in (1), the drive has a reset function by an external reset signal, the accessor control unit outputs a reset signal to the drive, and the accessor inserts a medium into the drive. A recovery control unit for turning on and off a reset signal for a drive in which an error has occurred in response to an instruction for a recovery operation to the reset control unit when the error is detected. (4). In the library device according to (2) or (3), when the recovery control unit detects an error that the medium cannot be ejected from the drive, the recovery control unit instructs the drive to eject the medium and then instructs the accessor to reinsert the medium. And performing a restore operation, and when detecting a medium-less error after the restore operation, instructs a reset control unit to perform a recovery operation. (5). The library device according to (2) or (3), wherein the recovery control unit instructs the reset control unit to perform a drive recovery operation based on a recovery instruction from the host.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram showing the appearance of the library device of the present invention.

FIG. 3 is an explanatory diagram of the internal structure of the library device of FIG. 2;

FIG. 4 is an explanatory diagram of the accessor of FIG. 3;

FIG. 5 is a block diagram of a first embodiment of the present invention in which recovery is performed by turning off and turning on the power supply.

FIG. 6 is a block diagram of a hardware configuration of an accessor control unit in FIG. 5;

FIG. 7 is a flowchart of a recovery process performed by the accessor control unit in FIG. 5;

FIG. 8 is a flowchart of a recovery process by the accessor control unit in FIG. 4 based on a command from the host.

FIG. 9 is a block diagram of a second embodiment of the present invention for performing recovery using a reset function of a SCSI interface.

FIG. 10 is a circuit diagram of a reset circuit for the SCSI interface of FIG. 9;

FIG. 11 is a block diagram of a hardware configuration of an accessor control unit in FIG. 9;

FIG. 12 is a flowchart of a recovery process performed by the accessor control unit in FIG. 9;

FIG. 13 is a flowchart of a recovery process by the accessor control unit in FIG. 9 based on a command from the host.

FIG. 14 is a block diagram of a third embodiment of the present invention in which recovery is performed using a dedicated reset function of a drive.

[Explanation of symbols]

10: Library device 10-1: Main body 11: Host 12: Operation panel 14: Loading / discharging door 16: MO cartridge (medium) 18: Cartridge storage unit 20, 32: Motor 22: Loading / discharging unit 24: Clutch unit 26-1 , 26-2: Receiving tray 30: Accessor 34: Balance weight 36, 36-1, 36-2: Drive 38: Rail 40: Picker 42: Slider 44-1, 44-2: Picker arm 46: Belt 48, 50: Pulley 52: SCSI interface bus 54: SCSI input connector 55: Internal SCSI bus 56: SCSI output connector 60: Accessor control unit 62: Recovery control unit 64: Power supply control unit 66-1, 66-2: Drive power supply unit 70-1, 70-2: Drive power supply line 72-1, 72-2: Drive-in Face bus 74, 75: Device 76: MPU 78: ROM 80: RAM 82: Drive IF circuit 84: SCSI protocol controller 86: Motor drive circuit 88: Tacho counter circuit 90: Power supply control circuit 92: Reset control unit 93: Power supply unit 94-1 and 94-2: Reset circuit for SCSI interface 96-1, 96-2: Reset control line for drive 98, 98-1: Reset control line for SCSI 100: OR circuit 102-1 and 102-2: Drive Reset terminal 104-1 and 104-2: Drive built-in reset circuit

[Procedure amendment]

[Submission date] November 12, 1999 (1999.11.
12)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

A charging / discharging section 22 is provided coaxially above the cell drum 18. The charging / discharging section 22 is a rectangular member, and has a tray 26 for storing the cartridge 16 at both ends.
1, 26-2. The charging / discharging section 22 has its center connected to a rotating shaft above the cell drum 18 via a clutch section 24 . When the connecting operation of the clutch unit 24 is performed, the charging / discharging unit 22 rotates integrally with the cell drum 18. When the disengagement operation of the clutch unit 24 is performed, the charging / discharging unit 22 is stopped even when the cell drum 18 rotates.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

When the operator inserts the cartridge 16 with the input / output unit 14 opened, the input cartridge 16 is stored in the receiving tray 26-1 located on the operator side of the input / output unit 22. After the cartridge has been inserted, the cell drum 18 and the input / output unit 22 are connected by the clutch unit 24, and the input / output unit 22 is rotated integrally with the cell drum 18 by the rotation of the motor 20 to the position toward the accessor 30 rotated 180 °. I do.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

When it is desired to take out the cartridge 16 inserted into the drive 36-1 by the picker 40 of the accessor 30 in the state shown in FIG. 4A, the slider 42 is advanced by rotating the belt 46 clockwise, and the slider 42 is moved forward. push the picker arm 44-1, 44-2 on both sides of the cartridge 16 that protrudes from the drive 36-1 as B), picker arm 44 - 1,44-2 into the fitting groove of the cartridge 16
Fit the nail inside the tip of the.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction contents]

(1) From operation When a move command of a cartridge from the host is received, the cell drum 18 is rotated to a position where the cell row of the cartridge including the source address is directed to the accessor 30, and at the same time, the accessor 30 is also driven in the vertical direction. The accessor 30 is positioned at the position of the cartridge storage cell from which the cell drum 18 has moved.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0057

[Correction method] Change

[Correction contents]

(2) Select Operation The picker of the accessor 30 is driven as shown in FIGS. 4A and 4B to take out the cartridge and hold it in the accessor 30.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0058

[Correction method] Change

[Correction contents]

(3) To operation The accessor 30 holding the cartridge is driven, and the drive 36-1 or 36-, which serves as a destination cell address, is driven.
Move to 2.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction contents]

(4) Restore Operation The picker of the accessor 30 is driven, and the cartridge is moved to the drive 36-1 or 36- which becomes the destination cell address.
Insert into 2.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction contents]

When the writing or reading of the cartridge by the host 11 is completed, the host 11 issues a move command for returning the cartridge to a specific cell of the cell drum 18 from the drives 36-1 and 36-2, and drives the accessor 30 to the drive 36. -1 or 36-2 from position, drive 36-1 or 36-2
Then, the accessor 30 is moved to the cell drum 18 while the picker is driven to pick up and hold the cartridge. At the same time, the cell drum 18 is driven to rotate and the storage cell is turned to the accessor 30 side.
Operation to position the cell in the storage destination cell, and finally, a restore operation for driving the picker of the accessor 30 to insert the cartridge into the cell to which the cell drum 18 is moved.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction contents]

Further, as shown in FIG. 3, the operation of moving the cartridge 16 from the charging / discharging door 14 to the cell drum 18 or the drive 36-1 or 36-2, or the operation of moving the cartridge 16 from the cell drum 18 or the drive 36-1 or 36-2. The operation of directly moving the cartridge to the loading / unloading door 14 is performed in the same manner.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

In the To operation of moving the cartridge by the accessor to the position of the drive in the transport operation, the motor 32 driven by the motor drive circuit 86
Takokaun data a moving distance of the accessor 30 by the rotation of the
Control is performed to position the accessor 30 at the cartridge insertion position of the drive while recognizing the circuit 88.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0083

[Correction method] Change

[Correction contents]

If the accessor 30 is the drive 36-1 or 3
When it is positioned at 6-2, the drive interface circuit 72-1 and 72-2 from the drive IF circuit 82 perform drive status confirmation and control instructions, and perform an operation of inserting or ejecting a cartridge into or from the drive.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0087

[Correction method] Change

[Correction contents]

For this reason, the drive 36-1 returns to step S
An ejection operation is performed to eject the cartridge that has been inserted in step 1. Lock signal E21 of the medium detected at this time is because it is turned off due to an error, the process proceeds to step S5, and turns off the eject signal E 31 as the end instruction of the medium discharge to the drive 36-1.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0090

[Correction method] Change

[Correction contents]

[0090] However, if the lock signal 21 indicating the even medium detected on again to discharge the medium from the drive 36-1 that caused the error is off, step S
Proceeds to 9, to cut the power supply to drive 36-1 undergoing error, turns off the power-controlled signal E11.

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0091

[Correction method] Change

[Correction contents]

[0091] Then, in step S10, for the reintroduction of the turns on the power-controlled signal E11 was once turned off. In the steps S9 and S10, when the power supply to the drive 36-1 causing the error is cut off and turned on again, the lock signal E21, which has been turned off due to the influence of static electricity or the like, causes the cartridge to be inserted at the time of the initialization processing by turning on the power again. Is detected and turned on.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

The accessor control unit 60 that has received the recovery command for instructing power-off and power-on turns on at step S
In 101 performs off power-controlled signal E11 to power down the drive 36-1 undergoing error, followed by the step S102, power-cycle the drive 36-1 undergoing error The power signal E11 is turned on, and a power-off / power-on completion report is made to the host 11 in step S103.

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

[0107] Reset circuit 94-1 of FIG. 11 is the same for the reset circuit 94 -2 drive 36- 2 side of FIG. 9, the reset signal E21 from the accessor control unit 60 is reset circuit portion 94-2 The drive 36-2 is supplied to the drive 36-2 as a reset signal of the SCSI interface bus, and a reset operation on the drive side is performed based on the interface reset signal.

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0108

[Correction method] Change

[Correction contents]

FIG. 11 is a circuit diagram of a hardware configuration of accessor control unit 60 in FIG. The accessor control unit 60 includes an MPU 76, a ROM 78, a RAM 80, a drive IF circuit 82, a SCSI protocol controller 8
4, a motor driving circuit 86 and Takokaun capacitor circuit 8 8, This is the same as the first embodiment of FIG. In addition, a reset control unit 92 is provided in FIG. 11, and reset signals E41 and E41 are output from the reset control unit 92 by drive-specific reset control lines 96-1 and 96-2.
E42 can be output.

[Procedure amendment 18]

[Document name to be amended] Statement

[Correction target item name] 0110

[Correction method] Change

[Correction contents]

In step S8, the drive 36-
If the lock signal E21, E 22 of the medium detected by the state 1,36-2 inserting the cartridge again is not turn on, the drive dedicated for the reset circuit section 94-1 and 94-2 of the SCSI interface bus in step S9 Reset signals E41 and E42 are turned on, and step S1
At 0, a recovery operation for turning off the reset signals E41 and E42 is performed.

[Procedure amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0111

[Correction method] Change

[Correction contents]

When the reset signals E41 and E42 are turned on,
The off, if recovery errors drives 36-1 and 36-2 that has fallen into a state that can not discharge the medium, the lock signal E21, E 22 of the medium detection from the drive 36-1 and 36-2 in step S11 Turns on and ends normally when recovery is successful.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name]

[Correction method] Change

[Correction contents]

In FIG. 14, the accessor control unit 62 provided in the library device 10 is provided with a recovery control unit 60 and a reset control unit 92, and these functions are the same as those in the second embodiment shown in FIG.

[Procedure amendment 21]

[Document name to be amended] Statement

[Correction target item name] 0119

[Correction method] Change

[Correction contents]

That is, after the cartridge is inserted into the drives 36-1 and 36-2 by the accessor 30, a lock signal E21, which indicates a medium detection obtained via the drive interface buses 72-1 and 72-2, is provided. If E 22 is off, the drive to the reset control unit 92 36-1,3
Recovery control for resetting the error by resetting 6-2 is performed.

Claims (5)

[Claims] 1. A cell unit having a plurality of cells for storing a medium, a drive for recording and reproducing data on and from a medium based on an instruction from a host, and a medium being conveyed between the cell unit and the drive. In a library device including an accessor, an accessor control unit for forcibly restoring the drive in which the error occurred to a normal state when an error is detected when the accessor inserts a medium into the drive is provided. Library device. 2. The library device according to claim 1, wherein:
A library device, wherein the accessor control unit turns off the power of a drive in which an error has occurred, and then turns it back on to restore the drive. 3. The library device according to claim 2, wherein
The accessor control unit includes a power supply control unit that controls turning on and off of a power supply unit installed for each of the drives, and a power supply control unit that detects an error that prevents the medium from being ejected when the accessor inserts a medium into the drive. And a recovery control unit for turning off and on the power of the drive in which the error has occurred in response to a recovery operation instruction to the library device. 4. The library device according to claim 2, wherein
The recovery control unit instructs the power supply control unit to perform a drive recovery operation based on a recovery instruction from a host. 5. The library device according to claim 1, wherein:
A library device, wherein the accessor control section restarts and restores a drive in which an error has occurred by a reset operation.