JPH06251570A - Library device - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a tape library device and a power failure detection method therefor, and makes it possible to detect a power failure such as an overcurrent at an early stage and with certainty to prevent the expansion of the power failure. With the goal. [Structure] The accessor control unit 7 includes: a non-volatile memory 18 for setting a power supply monitoring flag; and: a non-volatile memory 18 is not accessed when a reset operation occurs due to an overcurrent after power-on, and the power is turned off. The power-off is set to the flag based on the detection signal of, the flag is checked in the initial diagnosis after the power is turned on, the power-on is set to the flag if the power-off is set, and the error is detected if the power-on is set. The MPU 12 that performs a process of outputting error information is provided, and the device is reset after the power is normally turned off and then turned on again or the device is reset due to a power failure such as overcurrent. It was configured so that it was possible to distinguish whether or not it stood up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a cartridge type recording medium loading / unloading mechanism (CAS), a cartridge storage cell, a magnetic tape unit (MTU), an accessor mechanism section, an accessor control section, and the like. In a magnetic tape library device that automatically mounts, removes, stores, and stores / plays back a recording medium, the device may have been powered on again after being normally powered off, or may have been damaged due to a power failure such as overcurrent. The present invention relates to a tape library device capable of distinguishing whether or not the device has started up after being reset, and a power failure detection method thereof.

[0002]

2. Description of the Related Art FIG. 9 is a block diagram of a conventional magnetic tape library device, and FIG. 10 is a block diagram of a conventional accessor controller.

In FIGS. 9 and 10, 1 is a magnetic tape library device, 2 is a magnetic tape device (MTU), 3 is a magnetic tape controller, 4 is a cartridge storage cell, 5 is an accessor mechanism part, 6 is an accessor power supply part, 7 is an accessor control unit, 8 is an accessor controller (ARC), 9 is an accessor mechanical controller (AMC), 10 is a host (HOST), 12 is a microprocessor (hereinafter referred to as “MP”).
U ”), 13 is a communication LSI, 14 is a reset signal generator, 15 is RAM, 16 is communication memory, 17 is an I / O port, 18 is a non-volatile memory,
Reference numeral 19 indicates a power supply monitoring unit.

§1: Description of magnetic tape library device
.. Refer to FIG. 9. A block diagram of a conventional magnetic tape library device is shown in FIG. As shown in the figure, the magnetic tape library device 1 includes a plurality of magnetic tape devices (MTU) 2 for performing recording / reproduction on a cartridge type magnetic tape (hereinafter referred to as “cartridge type recording medium”), and A magnetic tape controller 3 for controlling the tape device 2, an accessor mechanism unit 5 for carrying a recording medium, an accessor control unit 7 for controlling the accessor mechanism unit 5 and the like, and an accessor mechanism unit 5 Further, the accessor control unit 7 and the like are provided with the accessor power supply unit 6 and the like that generates a necessary voltage and supplies electric power.

The accessor controller 7 is provided with an accessor controller (ARC) 8 and an accessor mechanical controller (AMC) 9. The accessor controller (ARC) 8 performs various communications with the host and various other controls (for example, control of access position when the medium is accessed from the host).

Accessor mechanical controller (AMC) 9
Is for controlling the accessor mechanism section 5 (actual control of the accessor mechanism) or driving the cell motor to rotate the cartridge storage cell 4 in accordance with an instruction from the accessor controller 8. is there.

The accessor power supply unit 6 is provided with a power supply of a voltage of 24 V and a power supply of a voltage of 5 V. The cartridge storage cell 4 and the accessor mechanism unit 5 (motor and other mechanical units) have a voltage of Supplies a power supply of 24V, and the accessor control unit 7 is supplied with a power supply of 5V.

§2: Description of accessor controller 8
.. see FIG. 10. A block diagram of the accessor controller 8 is shown in FIG. As shown, accessor controller (AR
C) 8 includes an MPU 12, a communication LSI 13, a reset signal generator 14, a RAM 15, a communication memory 16, an I / O port (I / O PORT) 17, a non-volatile memory 18, a power supply monitor 19, and the like. There is.

The communication LSI 13 controls various communications with the host 10, and the MPU 12 performs various communications with the host via the communication LSI 13 and various control of the accessor. Is to do.

The power supply monitoring unit 19 monitors the power-on / power-off state of the accessor power supply unit 6. For example, when the power supply is cut off, the MPU 12 is notified (notified by interruption).

The communication memory 16 is a memory for reading / writing data when the accessor controller 8 and the accessor mechanical controller 9 communicate (communication between MPUs).

The RAM 15 is a memory for storing microprograms executed by the MPU 12, and the I / O port 17 is a port for connecting to various I / O devices. The non-volatile memory 18 is a memory for storing various setting information of the device, and the reset signal generator 14
The device power supply (voltage 5) supplied to the accessor control unit 7
V) is monitored (the power supply is stabilized), and when the power is turned on and the voltage is stabilized, a reset signal is generated.

§3: Description of the operation of the accessor controller As described above, the cartridge storage cell 4 and the accessor mechanism section 5 use a power source of a voltage of 24V, and the accessor control section 7 uses a power source of a voltage of 5V. (Power supply for control) is used.

In a device using such a power supply, for example, a failure occurs in the circuit system of the cartridge storage cell 4 or the accessor mechanism section 5 which uses the 24 V power supply, and the circuit system is overloaded. Suppose an electric current flows.

In this case, the 5V power supply for the accessor control unit 7 may temporarily drop due to the power capacity of the accessor power supply unit 6. At this time, the reset signal generator 1
Reference numeral 4 monitors the control power supply with a voltage of 5V, and when the control power supply (5V) drops below a certain constant voltage and reaches the specified voltage again, a reset signal is output to the logic circuit, and the entire device Is reset and the same operation is performed when the power is turned on.

[0016]

SUMMARY OF THE INVENTION The above-mentioned conventional devices have the following problems. For example, when a failure occurs in the cartridge storage cell 4 or the circuit system of the accessor mechanism unit 5 and an overcurrent flows in the circuit system,
The accessor controller operates as described above.

For this reason, when the entire device is reset and starts up normally, it is not apparent whether or not an overcurrent has occurred. In the worst case, if each mechanism is operated for initial diagnosis after device reset,
Overcurrent occurs again, and the entire device is reset, and the same operation is repeated.

For this reason, there is a possibility that even unrelated circuits may be broken down and the failure may be expanded. The present invention solves such a conventional problem and eliminates a power failure such as an overcurrent.
An object of the present invention is to enable early and reliable detection to prevent the expansion of a fault to other circuit systems and the like.

[0019]

FIG. 1 is a diagram for explaining the principle of the present invention. In FIG. 1, the same parts as those in FIGS. 9 and 10 are designated by the same reference numerals.

In order to solve the above problems, the present invention has the following configuration. (A): a cartridge type recording medium loading / unloading mechanism,
A cartridge storage cell 4 capable of accommodating a plurality of cartridge-type recording media, a recording / reproducing device (magnetic tape device 2) for recording / reproducing data to / from the cartridge-type recording medium, and a cartridge-type recording medium are carried. Accessor mechanism unit 5 for accessing the cartridge storage cell 4, recording / reproducing device (magnetic tape device 2), etc., accessor control unit 7 for controlling the accessor mechanism unit 5, accessor mechanism unit 5, and accessor control unit 7 In the magnetic tape library device including the accessor power supply unit 6 for supplying electric power to the
: A nonvolatile memory 18 for storing a power supply monitoring flag (A) for monitoring the power-on / power-off state of the accessor power supply unit 6, and: A power failure such as an overcurrent after the accessor power supply unit 6 is powered on. When the reset operation occurs, the nonvolatile memory 18 is not accessed, and the power cutoff data is set in the power supply monitoring flag (A) based on the power cutoff detection signal, and the initial diagnosis after the power is turned on is performed. Check the power supply monitoring flag (A), and if the power-off data is set, set the power-on data to the power-supply monitoring flag (A), and if the power-on data is set, It is determined that a processor (MPU12) for outputting error information is provided, and after the power is normally cut off by the processing of the processor (MPU12), Source is what has been turned on, after the device a power failure such as overcurrent is reset, whether the device rises, and distinguishable configured.

(B): In the method for detecting a power failure in the magnetic tape library device according to the configuration (a) :: When the reset operation occurs due to a power failure such as an overcurrent after the accessor power supply section 6 is powered on, When the power-off detection signal of the accessor power supply unit 6 is generated without accessing the non-volatile memory 18, data indicating that the power is turned off is set in the power-supply monitoring flag (A) of the non-volatile memory 18. At the same time, at the initial diagnosis after the power is turned on, the power monitoring flag (A) of the non-volatile memory 18 is checked, and the data indicating that the power is cut is set in the power monitoring flag (A). When it is determined that the power supply is turned on, data indicating that the power supply is turned on is set in the power supply monitoring flag (A), and the power supply monitoring flag (A) is set to the power supply monitoring flag (A). After the data indicating the input state is not set, it is determined that an abnormal state, and outputs error information. By performing the above-mentioned processes (1) to (3) by the processor (MPU12) of the accessor control unit, the power is turned off normally, then the power is turned on again, or the device is reset due to a power failure such as overcurrent. After that, it was configured to be distinguishable whether the device was started up.

[0022]

The operation of the present invention based on the above configuration will be described with reference to FIG. As shown in FIG. 1, the nonvolatile memory 1
In a certain area of 8, a power supply monitoring flag (A) is set. Then, in the accessor controller 8, the following processing is performed to detect the power failure.

After the accessor power supply unit 6 is powered on, when the power supply (voltage 5V) of the accessor control unit 7 becomes stable, the reset signal generation unit 14 generates a reset signal to the logic circuit.

As a result, the reset operation of the device is started, but when the reset operation occurs due to a power failure such as an overcurrent, the MPU 12 does not access the nonvolatile memory 18.

When the power of the accessor power supply unit 6 is cut off, the power supply monitoring unit 19 detects the state, and the MPU 1
2 is notified by interruption. : The MPU 12 knows the power-off by this interrupt, and immediately sets the data indicating the power-off in the power monitoring flag (A) of the nonvolatile memory 18.

After the power is turned on, the MPU 12 makes an initial diagnosis. In this initial diagnosis, the MPU 12 checks the power supply monitoring flag (A) of the nonvolatile memory 18. As a result, if data indicating that the power supply is cut off is set in the power supply monitoring flag (A), MP
U12 determines that it is in a normal state, and sets data indicating that the power is turned on in the power supply monitoring flag (A).

If the data indicating the power-on state is set in the power supply monitoring flag (A), the MPU
12 determines that it is in an abnormal state and outputs error information.
By performing the above processing, it is possible to distinguish whether the power has been turned off normally and then turned on again, or the device has been restarted after being reset due to a power failure such as overcurrent. It will be.

As a result, a power failure such as an overcurrent can be detected early and surely. Further, it is possible to prevent the reset operation of the device and the repeated operation of the occurrence of overcurrent, and prevent the expansion of the trouble to other circuit systems and the like.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. 2 to 8 are views showing an embodiment of the present invention. In FIGS. 2 to 8, the same parts as those in FIGS.
It is indicated by the same reference numeral.

Further, 22 and 23 are operator panels and 2
Reference numeral 4 is a loading hole, 25 is a discharging hole, 26 is a cartridge type recording medium, 27 is a cartridge loading / unloading mechanism (CAS),
28 is a starter motor, 29 is a control unit, 31
Is a power supply device, 32 is a NOVRAM, 33 is an address control circuit, 34 is a control circuit, 36 is an S-RAM array, 37
Indicates an EEROM array.

§1: Description of external appearance of magnetic tape library device--see FIG. 2 Perspective view of magnetic tape library device of this embodiment (front side)
Is shown in FIG. As shown in the figure, operator panels 22 and 23 are provided on the front side of the magnetic tape library apparatus 1 so that they can be operated by the operator.

The front side of the magnetic tape library apparatus 1 is provided with an inlet 24 and an outlet 25 of a cartridge inserting / ejecting mechanism so that a cartridge can be inserted and a used cartridge can be taken out. ing.

§2: Internal Description of Magnetic Tape Library Device 1 ... See FIGS. 3 and 4 FIG. 3 is a plan view (internal) of the magnetic tape library device 1. FIG. 4 shows the side surface (inside) of the magnetic tape library device 1.

As shown in FIG. 3, the magnetic tape library device 1 includes a plurality of cartridge type recording media 26.
For storing and storing a plurality of magnetic tape units (MTU0 to MTU3) 2, an accessor mechanism unit 5, an accessor control unit 7 for performing various controls of the accessor mechanism unit 5, and a cartridge loading / unloading unit. Mechanism (C
AS) 27, a control unit 29 for controlling the entire device, a power supply device 31, an accessor power supply unit 6,
The magnetic tape device includes a power supply unit (CU-PSU) and the like.

The cartridge storage cell 4 is configured so that a plurality of cartridge type recording media 26 can be housed and stored therein, and is driven to rotate to a predetermined position by a cell motor 28.

The cartridge loading / unloading mechanism 27 is a cartridge type recording medium 2 loaded by an operator from the outside.
6 is conveyed one by one to a position where it is delivered to the accessor mechanism section 5 while being separated, or the cartridge type recording medium 26 received from the accessor mechanism section 5 is ejected to the outside. Is.

The accessor mechanism section 5 is a cartridge type recording medium 26 carried by the cartridge loading / unloading mechanism 6.
The cartridge type recording medium 26 is received and carried into the cartridge storage cell 4, or the cartridge type recording medium 26 in the cartridge storage cell 4 is taken out and mounted in the magnetic tape device 2, The cartridge type recording medium 26 is removed from the tape device 2 and inserted into the cartridge storage cell 4.

The accessor control section 7 controls the accessor mechanism section 5, the cartridge storage cell 4, and the like. The accessor control unit 7 and the accessor mechanism unit 5 constitute an accessor.

The power supply 31 is a commercial power supply (for example,
The power supply device is connected to 100 V / 200 V), and the power is distributed from the power supply device 31 to the accessor power supply unit 6, the power supply device (CU-PSU) of the magnetic tape device, and the like.

§3: Outline of operation of magnetic tape library apparatus ... See FIGS. 2, 3, and 4 In the magnetic tape library apparatus 1, an operator makes a plurality of windings from the loading port 24 of the cartridge loading / unloading mechanism 27. When the cartridge type recording medium 26 is loaded, the cartridge loading / unloading mechanism 27 separates the cartridge type recording medium 26 one by one, conveys it to a predetermined position, and transfers it to the accessor mechanism section 5.

Upon receiving the cartridge type recording medium 26, the accessor mechanism section 5 conveys the cartridge type recording medium 26 and inserts it into a predetermined shelf of the cartridge storage cell 4.

When recording / reproducing on / from the cartridge type recording medium 26, the accessor mechanism section 5 is used.
Removes the cartridge-type recording medium 26 from the designated location of the cartridge storage cell 4 and carries it, and inserts it into the magnetic tape device 2, or takes out the cartridge-type recording medium 26 that has been processed from the magnetic tape device 2. The cartridge storage cell 4 is inserted and stored in a predetermined place.

§4: Description of magnetic tape library device and its power supply--see FIG. 5 A block diagram of the magnetic tape library device is shown in FIG.
As described above, the magnetic tape library device 1 includes a plurality of magnetic tape devices (MTUs) 2, a magnetic tape controller 3, an accessor mechanism unit 5, an accessor control unit 7, an accessor power supply unit 6, and a power supply. A device 31 and the like are provided.

The accessor control section 7 is provided with an accessor controller (ARC) 8 and an accessor mechanical controller (AMC) 9. In the magnetic tape library device having such a configuration, the power supply device 31
Is connected to a commercial power supply (for example, 100V / 200V) and distributes the power to each power supply unit.

For example, the accessor power supply unit 6 uses a power supply of a voltage of 24 V based on the power supplied from the power supply device 31,
It is converted to a power source of voltage 5V and used as a power source for the accessor and the cartridge storage cell.

The accessor mechanism section 5 and the cartridge storage cell 4 are configured to be powered from the 24V power source of the accessor power source section 6, and the accessor control section 7 is configured to be powered from the 5V power source of the accessor power source section 6. There is.

§5: Description of accessor controller and flags set in non-volatile memory (NOVRAM)
-Refer to FIG. 6. The block diagram of the accessor controller 8 is shown in FIG.
The accessor controller 8 includes an accessor controller 8
And an accessor mechanical controller 9 is provided. The accessor mechanical controller 9 has the configuration shown in FIG.

That is, the accessor controller (AR
C) 8 is MPU 12, communication LSI 13, reset signal generator 14, RAM 15, communication memory 16, I / O port (I / O PORT) 17, NO
The VRAM 32 and the power supply monitoring unit 15 are included.

Among these components, the communication LSI 13, the power supply monitoring unit 19, the communication memory 16, the RA
M15, I / O port 17, reset signal generator 14
Is the same as the conventional example shown in FIG.

In this embodiment, the nonvolatile memory is N
Using the OVRAM (details will be described later) 32, the MPU 1
The processing of No. 2 was different from the conventional example (described later). Then, the NOVRAM 32 has a power supply monitoring flag (A).
Area is set. This power supply monitoring flag (A)
Is for performing rewriting processing (flag setting processing) by the MPU 12 in the accessor controller 8.

For the power supply monitoring flag (A), for example, "0x00" data is set when the power is off, and "0xFF" data is set when the power is on. §6: Description of NOVRAM ... See FIG. 7 An explanatory view of the NOVRAM is shown in FIG. 7 (A) is NO
It is a block diagram of VRAM, FIG. 7B is a NOVRAM,
It is a figure showing the connection relation between MPU and I / O port.

NOVRAM (Non Volatile Static Rand
om Access Memory) (X2212 manufactured by XiCOR)
Is an element called a non-volatile S-RAM element. As shown in FIG. 7A, the NOVRAM 32 is
S-RAM (Static Random Access Memory) array 36
EEROM (Electrically Erasable And Programm
able read only memory (EEPROM) array 37
And an address control circuit 33, a control circuit 34, and the like.

The address control circuit 33 writes or reads data to or from a designated address of the S-RAM array 36 by selecting a write signal (WRITE) and a read signal (READ).
Read) control is performed.

For example, an address signal and a write signal are sent to the address control circuit 33, and the S-RAM array 36 is sent.
To the S-RAM array 36, the data signal is written to the S-RAM array 36.

When an address signal and a read signal are sent to the address control circuit 33, the S-RAM array 36
You can read the data from. The control circuit 34
Selects S-RA by selecting the store / recall signal.
The data of the M array 36 is instantly written to the EEROM array 37 (in the case of a store signal), or vice versa.
The data in the ROM array 37 is instantaneously written in the S-RAM array 36 (in the case of a recall signal).

When the NOVRAM 32 as described above is provided in the accessor controller 8 shown in FIG. 6, the connection relation of each part is as shown in FIG. 7B. As shown in FIG. 7B, the address signal, the data signal, the write signal, and the read signal of the NOVRAM 32 are sent via the bus (address bus, data bus, control bus) of the MPU 12. These signals are also sent to the I / O port 17.

For example, the address signal is sent from the MPU 12 to the NOVRAM 32 via the address bus, and the write signal and the read signal are sent to the MV via the control bus.
It is sent from the PU 12 to the NOVRAM 32.

Further, the data signal is transferred between the MPU 12 and the NOVRAM 32 via the data bus. Further, the store signal and the recall signal are the MPU.
12 controls NOVRAM from I / O port 17
Sent to 32.

When such an NOVRAM 32 is provided in the accessor controller 8 shown in FIG. 6, the processing (recall / store) at power-on and power-off is as follows.

When the power of the accessor power supply unit 7 is turned off, the power supply monitoring unit 19 in the accessor controller 8 monitors the power off.
Before the voltage drops (compensated for a certain period of time), an interrupt signal is generated to the MPU 12 in the accessor controller 8.

The MPU 12 sets data in the power supply monitoring flag of the NOVRAM 32 by this interrupt signal or the like. In this case, the MPU 12 uses the NOVRAM 32
The data to be set is sent to the S-RAM 36, and the write signal and the address signal are sent to the address control circuit 33. As a result, the above data is written in the S-RAM array 36.

Thereafter, the I / O is controlled by the control of the MPU 12.
A store signal is generated for the NOVRAM 32 via the port 17. In the NOVRAM 32, when the store signal from the I / O port 17 is input, the control circuit 34
Thus, the data in the S-RAM array 36 is written (stored) in the EEROM array 37. As a result, the data (power supply monitoring flag) is stored in the EEROM array 3
Stored in 7.

However, the processing at the time of power-off is completed until the voltage drops after the power-supply monitor 19 detects the power-off and generates an interrupt signal to the MPU 12. : Processing at power-on When the accessor power supply unit 6 (see FIG. 5) is powered on and the voltage becomes stable, the reset signal generation unit 14 of the accessor controller 8 (see FIG. 6) sends a reset signal to the logic circuit. To occur.

As a result, the MPU 12 of the accessor controller 8 performs initial diagnosis / initialization. At the time of this initial diagnosis, the MPU 12 uses the I / O port 17 to set the N
A recall signal is generated for the OVRAM 32.

In the NOVRAM 32, when the recall signal is input, the control circuit 34 controls data recall. That is, the control circuit 34 of the NOVRAM 32
Then, the data (power supply monitoring flag) stored in the EEPROM array 37 is written (recall) in the S-RAM array 36.

Thereafter, the MPU 12 reads the data in the S-RAM array 36 (in this case, the MPU 12
A read signal and an address signal are sent to the address control circuit 33), and a power supply monitoring flag is checked.

§7: Description of processing of the embodiment--see FIG. 8 A processing flowchart of the embodiment is shown in FIG. Below, FIG.
The process of the embodiment will be described based on the process flowchart of FIG.

This process is performed in the accessor controller 8 in the accessor controller 7. Note that FIG.
The block diagram of the accessor controller shown in FIG. 0 is the same in this embodiment (only when expressed in the block diagram, FIG.
Since it is the same as 0), it will be described with reference to FIG. Also,
S1 to S8 indicate respective process numbers.

Processing explanation when power is cut off ... FIG. 8
See (A) When the accessor power supply unit 6 is powered off (S6), the power supply monitoring unit 19 (see FIG. 10) detects this power supply disconnection. Then, the power supply monitoring unit 19 issues an interrupt to the MPU 12 and notifies that the power-off is detected.

When the above interrupt occurs, the MPU 12 sets (sets) data (for example, 0x00) indicating that the power is cut off in the power monitor flag (A) of the NOVRAM 32 in the interrupt process ( S7). Then, wait until the power is turned off (S
8).

Description of processing at power-on ... FIG. 8
See (B) When the accessor power supply unit 6 is powered on (S1),
Reset signal generator 14 in accessor controller 8
Then, it is monitored that the voltage (5V) is stable, and when it is stable, a reset signal is generated to the logic circuit.

As a result, the MPU 12 performs an initial diagnosis process when the apparatus is started up. In this initial diagnosis process, the power supply monitoring flag (A) of the NOVRAM 32 is checked (S2).

As a result of this check, if the power supply monitoring flag (A) is set with data indicating that the power supply has been cut off (for example, 0x00), the MPU
12 determines that the power is normally turned off and then turned on again, and performs the next process (S5).

In this processing (S5), the MPU 12 sets N
Data (for example, 0xFF) indicating that the power is turned on is set in the power monitoring flag (A) of the OVRAM 32. Then, the normal processing is performed thereafter.

As a result of checking the power supply monitoring flag (A), if the power supply monitoring flag (A) is set with data indicating that power is turned on (for example, 0xFF). During the operation of the device, a power failure such as an overcurrent occurred and the device was reset.

In this case, the MPU 12 judges that it is in an abnormal state, displays error information on the display section of the operator panel 22 (S3), and ends the processing (S4). It should be noted that when a power failure due to an overcurrent or the like occurs after the power is turned on, a reset operation of the device occurs. When this reset operation occurs, the MPU 12 causes the NOVRAM to operate.
No access to 32, power supply monitoring flag (A)
Leave it alone.

With the above processing, the MPU 12 checks the power supply monitoring flag of the NOVRAM 32 after the power is turned on, and after the power is normally cut off,
It is possible to distinguish whether the power is turned on again or the device is reset due to overcurrent or the like and the device is started up.

[0078]

As described above, the present invention has the following effects. : It is possible to reliably detect that the device has been reset due to a power failure such as overcurrent. Further, it is possible to prevent the occurrence of a power failure such as an overcurrent and the repetition of the reset operation.

A power source failure such as an overcurrent can be detected early and surely. Therefore, it is possible to prevent the power failure from spreading.

[Brief description of drawings]

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

FIG. 2 is a perspective view (front side) of the magnetic tape library device in the embodiment.

FIG. 3 is a plan view (inside) of the magnetic tape library device in the embodiment.

FIG. 4 is a side view (inside) of the magnetic tape library device in the embodiment.

FIG. 5 is a block diagram of a magnetic tape library device according to an embodiment.

FIG. 6 is a block diagram of an accessor controller in the embodiment.

FIG. 7 is an explanatory diagram of a NOVRAM according to an embodiment.

FIG. 8 is a processing flowchart of the embodiment.

FIG. 9 is a block diagram of a conventional magnetic tape library device.

FIG. 10 is a block diagram of a conventional accessor controller.

[Explanation of symbols]

 1 magnetic tape library device 2 magnetic tape device 3 magnetic tape controller 4 cartridge storage cell 5 accessor mechanism unit 6 accessor power supply unit 7 accessor control unit 8 accessor controller (ARC) 9 accessor mechanical controller (AMC) 12 MPU (microprocessor) 14 reset Signal generator 18 Non-volatile memory 19 Power supply monitor

Claims (2)

[Claims] 1. A cartridge type recording medium (26) loading / unloading mechanism (27), a cartridge storage cell (4) capable of accommodating a plurality of cartridge type recording media (26), and a cartridge type recording medium (26). , A recording / reproducing device (2) for recording / reproducing data, and a cartridge type recording medium (26) for carrying the cartridge storage cell (4) and the access device for accessing the recording / reproducing device (2). Mechanism part (5), accessor control part (7) for controlling the accessor mechanism part (5), accessor mechanism part (5), and accessor control part (7)
In a library device provided with an accessor power supply unit (6) for supplying power to the accessor etc., the accessor control unit (7) includes: for power supply monitoring for monitoring the power-on / off state of the accessor power supply unit (6) A non-volatile memory (18) for storing a flag (A), and: When the reset operation of the device occurs due to a power failure such as an overcurrent after the accessor power supply section (6) is turned on, the non-volatile memory ( 18) Access to the power supply monitoring flag (A) based on the power-off detection signal without accessing
In addition to setting the power-off data, check the power-supply monitoring flag (A) in the initial diagnosis after power-on. If the power-off data is set, set the power-supply monitoring flag (A) to the power-supply Processor (1 that sets the data for turning on, judges the error if the data for turning on the power is set, and outputs error information.
2) is provided, and after the power is normally turned off by the processing of the processor (12), the power is turned on again, or the device is reset due to a power failure such as overcurrent, and then the device is started up. A library device characterized by making it possible to distinguish whether or not. 2. The library device according to claim 1, wherein: when a reset operation occurs due to a power failure such as an overcurrent after the accessor power section (6) is turned on,
No access to the non-volatile memory (18): When the power-off detection signal of the accessor power supply section (6) is generated, the power is turned off in the power-supply monitoring flag (A) of the non-volatile memory (18). Data (0xO
O) is set, and: In the initial diagnosis after the power is turned on, the nonvolatile memory (18)
Of the power supply monitoring flag (A) is checked: If the power supply monitoring flag (A) is set to the data (0x00) indicating that the power supply is cut off, it is determined that the power supply is in a normal state. In the power supply monitoring flag (A),
Data (0xFF) indicating that the power is turned on is set, and: If data (0xFF) indicating the power-on state is set in the power supply monitoring flag (A), it is determined as an abnormal state and error information is given. The processor (12) of the accessor control unit performs the above processes (1) to (3) so that the power is turned off normally and then the power is turned on again, or the device is damaged due to a power failure such as overcurrent. A method for detecting a power failure in a library device, wherein it is possible to distinguish whether or not the device has started up after being reset.