JPH103360A - Duplex storage managing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To introduce and maintain duplex storage mediums without special knowledge concerning a system by Judging whether a control part, an install part or a duplex restoring part is started or a message is displayed based on identifying information of the duplex storage medium and managing information of a duplex storage state. SOLUTION: The duplex storage mediums 1a and 1b for duplexing and maintaining information are provided with pieces of identifying information 11a and 11b for uniquely identifying the pair of the mediums and pieces of managing information 12a and 12b for managing the duplex storage state. A duplex state managing part 2 judges whether the control part 3a for controlling access as against the duplex storage mediums 1a and 1b is started, the install part 4 for executing installing for the duplex storage mediums 1a and 1b is started, the duplex restoring part 5 for restoring the duplex states of the duplex storage mediums 1a and 1b is started or the message is displayed in a display part 6 based on identifying information 11a and 11b and managing information 12a and 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to the management of the state of duplicate storage such as a duplicate disk of a computer system. 2. Description of the Related Art In recent large-scale on-line systems, workstations having a large-capacity database are increasingly installed in branch offices and business offices. At this time, depending on the data to be recorded, it is necessary to duplicate a disk or the like as a storage device for data security.

However, a CE (customer engineer) who maintains a workstation in a branch or a sales office cannot be dedicated to a device like a large-sized machine due to cost and the like, and has a system management with specialized knowledge. Maintenance of duplicated disks is as simple as possible, since it is not possible to assign a user to all devices.
It must be able to be implemented without knowledge of the configuration of the device.

[0003]

2. Description of the Related Art A conventional dual disk state management apparatus is premised on a large machine or a server machine having an administrator who has deep knowledge of a corresponding system, and manages a copy direction and a state at the time of restoration. Was performed by the administrator instructing from the console.

For this reason, the system manages the state of which disk is normal, but the duplication restoration after the restoration is all performed based on the instruction of the administrator.

[0005] However, a large number of workstations at branch offices and business offices are deployed nationwide, and it is not possible to assign a system administrator to all devices. For this reason, there is a problem in the maintenance after the abnormality is detected in the duplicated disk (the duplicated disk cannot be operated).

[0006] Further, even if the CE of the manufacturer takes over the system management of the user, the individual CEs understand all the maintenance methods in the system of each user for the maintenance of the duplicated disk which occurs rarely. There was no reason for this, which caused troubles such as erroneous operation (erroneous operation).

Furthermore, with the recent increase in the capacity of magnetic disks, the number of cases in which a defective medium is detected on the replaced disk itself has been increasing, and such a situation is confused in trouble maintenance. If it occurred, it would cause further operational mistakes.

[0008]

The above-mentioned prior art has the following problems. (1): Since a large number of workstations in branches and business offices are deployed nationwide, it is not possible to assign a system administrator to every device. Therefore, there is a problem that the operation of the duplicated disk cannot be performed after the abnormality is detected in the duplicated disk.

(2): Even if the manufacturer's CE takes over the system management of the user, the individual CEs understand all the maintenance methods in the system of each user for the maintenance of the duplicated disk which rarely occurs. There was no reason to keep it, which caused troubles such as operational mistakes.

(3): With the recent increase in the capacity of the magnetic disk, the number of cases in which a defective medium is detected on the replaced disk itself has increased, and such a situation has been confused in failure maintenance. When the situation occurred, it caused further operational mistakes.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems and maintain the following items in maintaining duplex disks such as workstations scattered throughout the country.

(1): It is possible for a general user who uses a workstation or a CE in charge of maintenance to maintain a duplicated disk without special knowledge about the system. (2): Even if there is an operation mistake during maintenance of the duplicated disk, the system detects it and prevents a situation in which user data is lost.

(3): In case of maintenance of a duplicated disk,
Even if a defect is detected in a replaced disk, it can be restored to a state before maintenance by a simple operation.

[0014]

FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, 1a and 1b are duplex storage media, 2 is a duplex status management unit, 3a is a control unit, 4 is an install unit, 5 is a duplex restore unit, 6 is a display unit, 7 is a maintenance medium,
11a and 11b indicate identification information, 12a and 12b indicate management information, and 71 indicates an initial state.

The present invention is configured as follows to solve the above-mentioned conventional problems. (1): A plurality of duplex storage media 1a and 1b for duplicating and maintaining information, a duplex status management unit 2 for managing the duplex status of the information, and control for controlling access to the duplex storage media 1a and 1b. A unit 3a, an installation unit 4 for performing installation on the duplex storage media 1a and 1b, a duplex restoration unit 5 for restoring the duplex state of the duplex storage media 1a and 1b, and a display unit 6 for displaying a message. The duplex storage media 1a and 1b are provided with identification information 11a and 11b for uniquely identifying a pair of the media and management information 12a and 12b for managing a duplex storage state. Information 11
A message is displayed on the display unit 6 based on the information a, 11b and the management information 12a, 12b, whether to start the control unit 3a, the installation unit 4, the redundancy restoration unit 5, or the like. Make a decision to do so.

(2) In the redundant storage management device of (1), when one of the redundant storage media 1a and 1b is broken and replaced with the maintenance medium 7, the maintenance medium 7
, The duplication state management unit 2 activates the duplication restoration unit 5 to restore the duplication state.

(3) In the redundant storage management device of (1), the redundant storage media 1a, 1
When any one of b is replaced with the maintenance medium 7 for preventive maintenance, the initial state is set in the maintenance medium 7 so that the duplex state management unit 2 activates the duplex restoration unit 5 to perform the duplex operation. Restore state.

(4) In the redundant storage management device of (1), when one of the redundant storage media 1a, 1b is broken, the maintenance storage medium is not broken.
In the case of replacement with a and 1b, the duplication state management unit 2 activates the display unit 6 and displays the fact on the display unit 6.

(5) In the redundant storage management device according to (2) or (3), when a failure occurs in the maintenance medium 7 replaced during the duplexing restoration processing, the medium before replacement is returned. The duplication state management unit 2 restores the state before maintenance.

(6) In the redundant storage management device of the above (1), when the maintenance work on the redundant storage media 1a, 1b is incomplete and an attempt is made to install the redundant storage media 1a, 1b, The state management unit 2 displays the broken dual storage medium 1a on the display unit 6,
1b is displayed after installation is completed.

(7) In the dual storage management device of the above (1), when one set of the dual storage media 1a and 1b is newly installed, the dual state management unit 2 activates the installation unit 4.

(8) In the redundant storage management device of the above (1), if the work is interrupted due to a power failure or the like while the installation to the redundant storage media 1a, 1b is being performed, or if the restart is performed, the redundant state management unit 2 Starts the installation unit 4.

(9) In the redundant storage management device of the above (1), if the work is interrupted due to a power failure or the like during the redundant restoration processing of the redundant storage media 1a, 1b, or when the restart, the redundant state management unit 2 Starts the duplex restoration unit 5.

(Operation) The operation based on the above configuration will be described with reference to FIG. The duplication state management unit 2 manages the duplication state of the information on the duplication storage media 1a and 1b, the control unit 3a controls access to the duplication storage media 1a and 1b, and the installation unit 4 executes the duplication storage medium 1a and 1b.
1b, the duplication restoring unit 5 restores the duplex state of the duplex storage media 1a, 1b, a display unit 6 displays a message, and the duplex storage medium 1
a, 1b, identification information 11 for uniquely identifying a pair of media
a, 11b and management information 12 for managing the duplicated storage state
a and 12b provided in the redundant storage management device, the redundant status management unit 2
And the control unit 3a based on the management information 12a and 12b.
Is started, the installation unit 4 is started, the duplexing restoration unit 5 is started, or a message is displayed on the display unit 6. Therefore, the system can automatically start a necessary part or display a message.

When one of the dual storage media 1a and 1b is broken and replaced with the maintenance medium 7, the initial state is set in the maintenance medium 7 so that the duplex state management unit 2 The duplication restoring unit 5 is activated to restore the duplex state. Therefore, the maintenance staff can automatically restore the duplex state simply by replacing the defective storage medium with the maintenance medium 7.

Further, one of the redundant storage media 1a and 1b which is operating normally is replaced with a maintenance medium 7 for preventive maintenance.
In this case, the duplication state management unit 2 activates the duplication restoration unit 5 to restore the duplication state by setting the initial state in the maintenance medium 7. Therefore, the maintenance staff can automatically restore the duplex state simply by replacing the storage medium with the maintenance medium 7.

When one of the redundant storage media 1a, 1b is broken and the maintenance medium is replaced with an unbroken redundant storage medium 1a, 1b, the duplex status management unit 2 displays the display unit 6. Upon activation, the display section 6 displays that fact. For this reason, it is possible to prevent data on the dual storage media 1a and 1b from being lost due to an erroneous operation of a maintenance person.

Further, if a defect occurs in the maintenance medium 7 replaced during the duplexing restoration processing, the duplexing state management unit 2 restores the state before maintenance by returning the medium before replacement. For this reason, a maintenance person or the like can automatically restore the state before maintenance simply by returning the storage medium before replacement.

In the state where the maintenance work on the dual storage media 1a and 1b is not completed, the dual storage medium 1a
When an attempt is made to install the redundant storage media 1a and 1b, the duplex status management unit 2 displays on the display unit 6 a message indicating that the installation is to be performed after the repair of the damaged duplex storage media 1a and 1b is completed. For this reason, it is possible to prevent data on the dual storage media 1a and 1b from being lost due to an erroneous operation of a maintenance person.

Further, when one set of the dual storage media 1a and 1b is newly installed, the dual status management unit 2 activates the installation unit 4. For this reason, installation is automatically performed, so that forgetting to install can be prevented.

Further, if the work is interrupted due to a power failure during the installation to the dual storage media 1a, 1b,
At the time of restart, the duplication state management unit 2 starts the installation unit 4. For this reason, since the installation is automatically performed by the restart, it is possible to prevent the system from operating without the installation being completed.

Further, if the operation is interrupted due to a power failure or the like during the duplication restoring processing of the duplicate storage media 1a and 1b, the duplication state management unit 2 activates the duplication restoration unit 5 at the time of restart. For this reason, since the duplexing restoration processing is automatically performed upon restarting, it is possible to prevent the system from operating without the completion of the duplexing restoration.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 2 to 11 are views showing an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (1): Description of a Duplex Disk Device FIG. 2 is an explanatory diagram of a duplicate disk device according to an embodiment of the present invention. Hereinafter, the dual disk device will be described with reference to FIG.

In FIG. 2, the duplicated disk device includes:
Duplex disk media 1a and 1b, which are dual storage media for storing system data,
A dual disk control unit 10 for controlling read / write to 1b, an OS (Operating System) unit 3 which activates the system and enables normal operations and has a function of accessing the dual disk, and installs the dual disk. And a duplication restoring unit 5 for restoring a duplicated state by copying data between duplicated disk media after maintaining the duplicated disk.

The symbol A in FIG.
a and 1b are explanations of reading during normal operation, and the duplicated disk control unit 10
The data is read from either one of them.

The symbol B in FIG.
a, 1b are descriptions of writing during normal operation, and the duplicated disk control unit 10
Write data to both of them.

The symbol C in FIG.
This is a description of a case where an error has occurred in the inner duplicated disk medium 1a of a and 1b. In this case, the duplicated disk control unit 10 reads and writes data from and to the remaining duplicated disk medium 1b in which no error occurs. is there.

(2) Description of Duplicated Disk Management Device FIG. 3 is an explanatory diagram of a duplicated disk management device according to an embodiment of the present invention. Hereinafter, a management apparatus for a dual disk will be described with reference to FIG.

Referring to FIG. 3, the duplicated disk management device is provided with duplicated disk media 1a and 1b, a duplicated state management unit 2, an OS unit 3, an installation unit 4, a duplicated restoration unit 5, and a display unit 6. Reference numeral 7 denotes a maintenance medium.

The duplicated disk media 1a and 1b are external storages for storing system data, and include identification information 11a and 11b for identifying the medium in the system and management information 12a for managing the state of the duplicated disk. , 12
b is recorded. This duplex disk medium 1
a and 1b can be duplicated with one set of a plurality of disk media, and if it is a rewritable external storage medium, a single magnetic disk device, a magneto-optical disk, and a section of the magnetic disk device can be used. You may comprise.

Identification information 11a, 11b and management information 12
If the rewritable area can always be dealt with even when the duplicated disk media 1a and 1b are replaced, a and 12b can be used in the volume label area (usually provided at the head of the medium) on the medium. It can also be configured with a non-volatile memory area.

As the identification information 11a and 11b, information for uniquely identifying a pair of the duplicated disk media in the system is set. This information is not used for control by the system, but the CE is operable and magnetic. It is used to recognize the correspondence based on this information (name) when the connection of the disk device or the like is incorrect.

The management information 12a, 12b is information for managing the state of the duplicated disk, and records whether the disk is operating normally, immediately after shipment from the factory, or whether an abnormality has been detected in the duplicated disk. If an error is detected on a duplicated disk, the other disk will complement each other's information assuming that the other disk cannot be read due to a failure. If other errors were recorded and the medium on which the error was detected could not be written or the medium on which the error was detected could not be read, the status could be determined from the remaining other errors. , To record the status. In addition, for the case where the installation is performed during the normal operation, the status of the installation or not is also recorded.

When the system is started, the duplication state management unit 2 refers to the management information 12a and 12b recorded on the duplicated disk media 1a and 1b, matches the management information for each duplicated disk, and determines a judgment matrix ( The state of the duplexed disk is determined by referring to FIG. 4), and it is determined whether to start the OS unit 3, the installation unit 4, or the duplexing restoration unit 5, or to display a message on the display unit 6 without starting the system. Things.

The OS unit 3 is a control unit that activates the system and enables normal business operations, and has a function of accessing a duplicated disk. The duplication state management unit 2 starts operation of the duplication disk according to the instruction, and the OS unit 3
In the case where an abnormality is detected in the duplexed disk medium 1a or 1b that is operating normally, first, "other error" is recorded in the management information 12a or 12b of the medium on which no abnormality is detected, and this is completed normally. Thereafter, "own error" is recorded in the management information 12a, 12b of the medium on which the abnormality is detected, and thereafter, if the medium on which the abnormality is detected is logically separated and operation is continued, duplication is performed. The disk may be formed in any configuration.

The installation unit 4 performs installation on a duplicated disk. Before the installation, the installation unit 4 inquires of the duplex state management unit 2 whether or not the installation is possible, and confirms that the installation is possible. Alternatively, the installation is performed when the instruction from the duplex state management unit 2 is met. In this case, at the time of the initial installation, the identification information 11a and 11b are initialized (the serial numbers and the like are inserted) in the duplicated disk media 1a and 1b only when the installation is normally completed.
"Normal" is set in the management information 12a, 12b. At the time of installing the revised version, before starting the installation, the management information 12a and 12b of the dual disk media 1a and 1b are set to indicate that both are being installed, and then the installation is started. When the installation is completed, this is cleared. If an error is detected in any of the dual disk media 1a and 1b during the installation, the installation is continued with the remaining medium, and when the installation is completed, the management information 12a and 12b are updated in the same manner as the OS unit 3. Any method can be used to perform installation from any medium and in any method.

The duplication restoring unit 5 restores the duplex state by copying data between the media after maintaining the duplex disk, and restores the duplex based on the instruction from the duplex state management unit 2. Only when the duplex state can be completely restored, first, the management information 12 of the restoration source medium
a and 12b are set to "normal", and after this is completed normally, the management information 12a and 12b of the restoration destination medium are set to "normal".
, The duplication state may be restored in any configuration.

The display unit 6 displays a message indicating that the medium to be replaced is incorrect or the connection of the device is incorrect based on the instruction of the duplex status management unit 2 when an operation in the maintenance of the duplex disk is detected. When the connection is incorrect, the identification information 11 of each medium is displayed.
By displaying a and 11b, it is possible to determine which medium has been connected to which. This display section 6
May be any display means such as a CRT (cathode ray tube) display or a liquid crystal display.

The maintenance medium 7 is a duplicate disk medium 1
In the event that a and 1b have failed, or in the case of preventive maintenance or the like performed to prevent a failure from occurring even if they have not failed, they serve as exchange media. If the initial state 71 is set in the area 12b, a single magnetic disk device, a magneto-optical disk, or a section of the magnetic disk device may be used. The initial state 71 may be a state in which a fixed value is set in a specific area on a medium at the time of shipment from a factory,
An inspection pattern for medium inspection may be used to detect the inspection pattern and determine the initial state.

(3): Explanation of the judgment matrix of the duplicated state management unit FIG. 4 is an explanatory diagram of the judgment matrix in the embodiment of the present invention. Hereinafter, based on FIG.
Will be described. Here, a indicates one side of the duplicated disk, and b indicates the other side of the duplicated disk.

The management information 12a, 12b (initial state, unreadable, own error, other error, normal) recorded on the dual disk media 1a, 1b are matched to form the judgment matrix of FIG. This judgment matrix is provided in the duplex state management unit 2.

When the system is started, the duplication state management unit 2 judges the state of the duplicated disk based on the judgment matrix, and starts the OS unit 3, the installation unit 4, or the duplication restoration unit 5, or starts the system. Instead of displaying a message on the display unit 6 instead.

(4) Description of Operation of Duplicated Disk Management Apparatus The operation of the duplicated disk management apparatus will be described with reference to FIGS. a: Description of Display Operation The display unit 6 displays a message when the medium to be replaced is incorrect or the device is incorrectly connected based on the instruction from the duplex state management unit 2. If the connection is incorrect, the identification information 11a and 11b of each medium is displayed so that it can be determined which medium has been connected to which medium.

B: Description of Initial Installation When a duplicated disk is newly introduced, the duplicated disk media 1a and 1b are in the state as shipped from the factory.
Both of the management information 12a and 12b are in the “initial state”. When the system is started in this state, the duplex state management unit 2 determines that the initial installation is necessary based on the determination matrix of FIG. 4, displays the fact on the display unit 6, starts the installation unit 4, and performs the initial installation. Let it.
The installation unit 4 initializes the identification information 11a and 11b only when all the installations have been completed normally, and records "normal" in the management information 12a and 12b.

As described above, the dual disk medium 1
When a and 1b are newly installed, the duplex status management unit 2
Based on the determination matrix (a), the installation unit 4 is automatically started, and forgetting to perform the initial installation can be prevented. Further, since the initialization of the identification information 11a and 11b and the setting of the management information 12a and 12b are not performed until the initial installation is not completed, even if the work is interrupted due to a power failure or the like before the initial installation is completed, the operation is repeated. Once started, the installation unit 4 is automatically started again.
It is possible to prevent the system from operating without the initial installation being completed.

When the initial installation is completed, both the management information 12a and 12b become "normal". When the system is started in this state, the redundant state management unit 2 can start the OS unit 3 based on (b) of the matrix in FIG. 4 and operate the system in a normal operation state.

C: Description when an error is detected in the duplicated disk medium If the system is operating in a normal operation state and an error is detected in one of the duplicated disk media 1a and 1b, the OS unit 3
Is the management information 12 of the medium on which no abnormality was detected.
"Other error" is recorded in a or 12b, and after this is completed normally, "own error" is recorded in the management information 12b or 12a of the medium on which the abnormality is detected. Thereafter, the medium on which the abnormality is detected is logically separated and operation is continued. Further, when the system is started in this state, the duplex state management unit 2 sets the O in accordance with (c) of the matrix in FIG.
By activating the S unit 3, the system can be operated with only one of the disks (normal side).

In some cases, depending on the detected error, writing to the medium on which the abnormality is detected cannot be performed (reading is normal). In this case, the OS unit 3 is started based on (d) (one management information is “normal” and the other management information is “other error”) in the determination matrix of FIG. (Normal side) can only work.

Further, an abnormality may be detected only when the duplication state management unit 2 tries to acquire the management information 12a and 12b of each medium. In this case, based on (e) of the judgment matrix in FIG. Then, after the OS unit 3 is started up and the abnormal side is separated, the system can be operated with only one of the disks (normal side).

As described above, except during maintenance,
The system can be operated as usual. d: Description when replacing with maintenance medium In a state where the system is operated on one of the disks ((c) in the determination matrix in FIG. 4), the abnormal side is replaced with the maintenance medium 7 and the system is replaced. Is activated, the exchanged medium is in the initial state 71, and the state changes to (f) on the judgment matrix of FIG. 4 by the exchange. Therefore, the duplication state management unit 2 activates the duplication restoration unit 5, and
By executing the duplicated restoration copy, the duplicated state is restored, and after that, if the OS unit 3 is activated, the system can be activated in the normal operation state.

As described above, by simply replacing the disk medium in which an abnormality has been detected with the maintenance medium 7, the duplication restoring unit 5 can be started and the duplication state can be restored without any particular operation. Also, since the management information 12a and 12b of either medium are not rewritten while the duplication restoration is not completed, even if the operation is interrupted due to a power failure or the like during the duplication restoration, when the system is restarted, the duplication restoration is automatically performed again. Part 5
Is started, it is possible to prevent the system from operating without the duplication restoration processing being completed.

[0062] Similarly, in the duplex restored copy, even if the abnormality to the maintenance medium 7 is a copy destination media had occurred, dual restored copy is also rewritten management information of both media for uncompleted Since the management information of the removed medium has not been rewritten, if the removed medium is returned to its original state, the state returns to (c) on the determination matrix in FIG. Therefore, even if a defect occurs in the maintenance medium 7 replaced during the duplication restoration, it is possible to return to the state before maintenance by simply returning the medium to the state before the replacement without any operation.

In a state where the system is operated on one of the disks ((c) in the judgment matrix of FIG. 4),
When the normal medium is replaced with the maintenance medium 7 and the system is started, the replaced medium is in the initial state 71, and the exchange causes a transition to (g) in the determination matrix of FIG. For this reason, the duplication state management unit 2 displays on the display unit 6 that the operation is erroneous (“shows the medium to be replaced”).
Message is displayed), and duplication restoration copy and system startup are not performed, so that loss of data due to erroneous replacement of an intact duplicated disk medium with the maintenance medium 7 can be prevented.

In addition to this, if the state becomes untransitionable when a duplicated disk is operated ((x) in the judgment matrix of FIG. 4), the duplicated state management unit 2 detects a connection error during maintenance. By judging that the connection of the device on which the medium is mounted is incorrect and displaying a list of identification information of the connected medium,
Data loss due to operation mistakes can be prevented.

When the system is operating in the normal operation state and one of the duplicated disk media 1a and 1b is replaced with the maintenance medium 7 by preventive maintenance, the judgment matrix of FIG. 4 changes from (b) to (h). Transition. When the system is started in this state, the duplication state management unit 2 starts the duplication restoration unit 5 and restores the duplication state by executing the duplication restoration copy. Can be started in the normal operation state.

E: Description of Revision Installation If installation is performed on the system while the dual disk is being maintained or the system is operating on one of the disks, the work may be interrupted due to a power failure during the installation, etc. There is a risk of losing the data that is the source of data restoration during maintenance of a duplicated disk. For this reason, the duplex state management unit 2 enables the installation unit 4 to be started only when both are in the initial state or when both are normal in the determination matrix in FIG. If the installation section 4 is to be started in any other state, a message is displayed on the display section 6 indicating that the damaged disk is to be repaired before installation, and the installation section 4 is not started. As a result, it is possible to prevent a situation in which the user data is lost due to an erroneous installation work after the work is interrupted due to a power failure or the like during maintenance of the duplicated disk.

When the system is operating in the normal operation state and the edition is installed on the duplex disk media 1a and 1b, the installation unit 4 sends the management information 12a, 1
After the installation flag is set in 2b, the installation is performed, and when the installation is completed, the flag is cleared. As a result, even if the work is interrupted due to a power failure or the like during the execution of the installation, if the work is restarted, the installation unit 4 is automatically again operated according to (i) of the determination matrix in FIG.
Is started, so that it is possible to prevent the system from operating without the revision installation being completed.

(5): Description of identification information and management information FIG. 5 is an explanatory diagram of identification information and management information according to the embodiment of the present invention, and FIG.
(B) is a description of the management information. Hereinafter, the identification information and the management information will be described with reference to FIG.

A: Description of Identification Information FIG. 5A shows an embodiment of identification information. By recording information on a volume label area, information always follows the medium even when the medium is exchanged. Can be realized.

In FIG. 5 (a), a primary side / a secondary side is set as the correspondence of the duplicated disk in the section. In addition, the serial number of each pair of duplex disks is assigned to the volume serial number. In this example, “SYS00
1, SYS002... ". For example, the volume division of the identification information 11a-1 and the identification information 11b-1 of the corresponding duplicated disk is the primary side and the secondary side, and the volume serial number is the same as "SYS001". Thus, even if the maintenance staff violates the connection error of the device, it is possible to determine which disk connection is wrong by referring to this list of information.

B: Description of Management Information FIG. 5B shows an embodiment of the management information. By recording the information on the volume label area, the information always follows the medium even when the medium is exchanged. Can be realized.

In FIG. 5B, the medium state is “normal”, “other error”, “own error”, and “initial state”.
Record The initial state is the initial state 71 of the maintenance medium 7.
This is an example. In addition, there is “unreadable” as a medium state when an abnormality is detected and cannot be read although the information is not recorded on the medium. This “unreadable” is used in the determination of the determination matrix in FIG. This medium state can be associated with a number or the like as follows. 0: Normal, 1: Other error, 2: Own error, OxFF: Initial state, (Ox10: Unreadable). The initial state 71 is
The determination may be made based on the fact that the shipment inspection pattern at the time of shipping the medium is written in the volume label area.

The in-installation flag is used to determine whether or not the installation is in progress. This flag has meaning only when the duplexed disk is operating normally,
If both are in normal operation, if one of them is being installed, it is considered that the installation is not completed. FIG.
In the example of (b), the in-installation flag is “OFF”, indicating non-installation.

(6): Description of Processing of Redundant State Management Unit FIG. 6 is a processing flowchart (1) of the redundant state management unit in the embodiment, and FIG. 7 is a processing flowchart of the redundant state management unit (2) in the embodiment. It is. Hereinafter, the processing of the duplex status management unit 2 will be described with reference to FIGS.

A: Description of Startup Process of Redundant Status Management Unit Referring to FIG. 6, the startup process of the redundant status management unit 2 will be described in accordance with steps S1 to S7.

S1: When the system is started, the duplex status management unit 2 acquires the respective management information 12a and 12b from the corresponding duplex disk media 1a and 1b, and executes step S2.
Move on to

S2: The duplication state management unit 2 manages the management information 1
The determination is made by 2a and 12b using the determination matrix of FIG.
If the determination is (a) or (i), the process proceeds to step S3. If the determination is (b), (c), (d), or (e), the process proceeds to step S4, and (f) and (h). If determined to be, the process proceeds to step S5, and if determined to be (g) (x), the process proceeds to step S7.

S3: The duplication state management unit 2 executes step S
If the determination in step 2 is (a) or (i), the installation unit 4 is started according to the contents of the corresponding cell (initial installation or revised installation) in the determination matrix in FIG. 4, and this processing ends. .

S4: The duplication state management unit 2 executes step S
In the case of (b), (c), (d) or (e) in the determination of 2, the OS unit 3 operates the content of the corresponding cell of the determination matrix in FIG. Just operate, a
Is separated and operated only by b, b is separated and operated only by a)
And ends this processing.

S5: The duplication state management unit 2 executes step S
If it is determined to be (f) or (h) in the determination of 2, the duplication restoring unit 5 determines the contents of the corresponding cell of the determination matrix in FIG. 4 (duplication restoration a to b, duplication restoration b to a, duplication prevention). The operation is started according to the maintenance a to b and the redundant preventive maintenance b to a), and proceeds to step S6.

S6: When the duplication restoration is completed, the duplication state management unit 2 activates the OS unit 3 in “normal operation”, and ends this processing. S7: The duplicated state management unit 2 determines in step S2
When it is determined as (g) or (x), the display unit 6 displays the contents of the corresponding cell of the determination matrix of FIG. 4 (a message “replace a”, a message “replace b”,
The message is displayed in accordance with the message “Check the connection”, and the process ends.

B: Description of Installation Confirmation Process of Duplication Status Management Unit Referring to FIG. 7, the installation confirmation process of the redundancy status management unit 2 will be described in accordance with steps S11 to S14.

S11: When the determination of the propriety of installation is requested from the installation unit 4 or the like, the duplication state management unit 2 acquires the management information 12a and 12b from the corresponding duplication disk media 1a and 1b, and proceeds to step S12.

S12: The duplication state management unit 2 makes a judgment by the judgment matrix shown in FIG. 4 based on the acquired management information 12a and 12b, and judges whether this judgment result is (a), (b) or (i). . If the judgment is (a), (b) or (i), the process moves to step S13, and if (a)
If not (b) or (i), the process moves to step S14.

S13: The duplication state management unit 2 returns the installation permission to the place where the determination of the installation permission is requested, and ends this processing. S14: If it is not (a), (b) or (i) in the judgment of step S12, the duplex state management unit 2 returns the installation impossible to the place where the judgment of the installation possibility is requested, and ends this processing.

(7): Description of Processing of OS Unit FIG. 8 is a processing flowchart (1) of the OS unit in the embodiment, and FIG. 9 is a processing flowchart (2) of the OS unit in the embodiment. Hereinafter, based on FIG. 8 and FIG.
The processing of S3 will be described. Here, a pair of duplicated disk media is assumed to be x and y. Note that a plurality of media (1a, 1b, 1c,...) Can be considered as a medium that can constitute a duplicated disk.

A: Description of the processing of the OS unit In FIG. 8, the processing of the OS unit 3 is described in steps S21 to S2.
Explanation will be made according to 5. S21: When the OS unit 3 is started by the duplex state management unit 2 at the time of system startup, the OS unit 3 branches to the next step S22 to step S24 according to an instruction (start parameter) at the time of the start. If the activation parameter is “normal operation”, the process proceeds to step S22. If the activation parameter is “operation only with x”, the process proceeds to step S23. If the activation parameter is “separate y and operate only with x”, the process proceeds to step S24. Move on.

S22: If the startup parameter is “normal operation”, the OS unit 3 sets the operation state of the duplicated disk to “normal operation”, and then proceeds to step S25 to start the system.

S23: The OS unit 3 determines that the activation parameter is “x
In the case of “only operation”, the operation state of the duplexed disk is set to “only x operation”, and then the process proceeds to step S25 to start the system.

S24: The OS unit 3 determines that the activation parameter is “y”.
In the case of “operation using only x”, the separation process is called to switch the operation to operation using only the remaining x by separating y, and then the process proceeds to step S25 to activate the system.

S25: The OS unit 3 starts up the system,
Make work possible. Also, if an error is detected during access to the duplicated disk during system startup or business execution, the disconnection process is called, the medium on which the error is detected is disconnected, and the operation is switched to operation using only the remaining media, and this process is terminated. I do.

B: Description of OS Unit Separation Process In FIG. 9, the OS unit 3 separation process is described in step S3.
A description will be given according to 1 to S34. Here, the medium to be separated is y, and the remaining medium is x.

S31: The OS unit 3 (separation processing unit)
It is determined whether the duplex disk medium is operating normally. If the operation is normal, the process proceeds to step S32. If the operation is not normal, the process ends.

S32: The OS unit 3 writes “other errors” in the management information of the medium x remaining without detecting any abnormality, and proceeds to step S33. S33: The OS unit 3 writes “own error” in the management information of the medium y to be disconnected in which the abnormality has been detected, and proceeds to step S3.
Move to 4.

S34: The OS unit 3 changes the operation state of the duplicated disk to “operation only by x”, and ends this processing. As described above, the disconnection process is performed only when the duplicated disk medium is in the normal operation state, and is performed after recording in the respective management information so as to complement each other in which abnormality has occurred.

(8): Description of Process of Installation Unit FIG. 10 is a flowchart of the process of the installation unit in the embodiment. Hereinafter, the process of the installation unit 4 will be described according to steps S41 to S51.

S41: The installation section 4 can be started from the duplex state management section 2 or can be started directly. For this reason, first, the installation unit 4 determines whether or not it has been started from the duplex state management unit 2. If it is determined in this determination that the system has been started from the duplex state management unit 2, the process proceeds to step S44. If the system has not been started from the duplex state management unit 2, the process proceeds to step S42.

S42: The installation section 4 makes an inquiry to the duplex state management section 2 to confirm the installation, and proceeds to step S43. S43: The installation unit 4 determines whether or not the installation is possible based on an inquiry to the duplex status management unit 2. If it is determined that the installation is possible, the process proceeds to step S44. If the installation is not possible, the process ends.

S44: The installation section 4 determines whether or not the type of installation to be performed is a revision installation. If it is determined that a revised version is to be installed, step S
The process proceeds to step S46, and if the edition is not to be installed, the process proceeds to step S46.

S45: The installation section 4 turns on the installing flag of the management information 12a, 12b of both duplex disk media, and proceeds to step S46. S46: The installation unit 4 performs the installation on the duplex disk for both the media constituting the duplex. If an abnormality is detected in one of the media during the installation, the process is continued with the remaining medium, and the process proceeds to step S47.

S47: The installation section 4 determines whether or not the installation on the duplex disk has been completed without any abnormality being detected in any medium. If no abnormality is detected in this determination, the process proceeds to step S48,
If an abnormality has been detected, the process moves to step S51.

S48: The installation section 4 determines whether or not the type of installation performed is a revised version installation. If it is determined that a revised version is to be installed, step S
The process moves to step S49, and if it is not a revision installation, the process moves to step S50.

S49: The installation section 4 completes the installation by turning off the installation flag in the management information 12a, 12b of both the duplicated disk media. S50: If the type of installation performed in step S48 is not a revised edition installation, the installation unit 4 identifies the identification information 11a, 11a of both duplexed disk media.
b is initialized (setting processing), and the management information 12a, 12b is set to “medium state = normal, installing = OFF” to complete the installation.

S51: The installation section 4 executes step S
If an error is detected in one of the media at 47, first, the “other error” is added to the management information of the normal medium.
Is written, and then "own error" is written in the management information of the medium on which the abnormality is detected, thereby completing the installation.

(9): Description of the processing of the duplexing restoration unit FIG. 11 is a flowchart of the processing of the duplexing restoration unit according to the embodiment. Hereinafter, the processing of the duplexing restoration unit will be described according to steps S61 to S63.

S61: The duplication restoring unit 5 performs copying from the copy source medium to the copy destination medium based on the instruction of the duplication state management unit 2. If an abnormality is detected during copying, the process is immediately stopped, and the routine goes to Step S62.

S62: The duplication restoring unit 5 determines whether the copy from the copy source medium to the copy destination medium has been completed normally. If the copy has been completed normally in this determination, the process proceeds to step S63, and if not, the process ends.

S63: The duplication restoring unit 5 sets the management information of the copy source medium to “medium state = normal, installing = O
After "FF" is set, the duplication restoration is completed by setting the management information of the copy destination medium to "medium state = normal, installing = OFF".

As described above, according to the present invention, when installing and maintaining a duplex disk, the CE automatically replaces the maintenance medium without any operation, and the system automatically restores the duplex. Further, even when an operation is performed, the system can detect the operation and prevent loss of user data. Furthermore, even if an error occurs in the maintenance medium during maintenance and other maintenance media cannot be obtained, simply returning the medium to the original one without any operation will restore the state before maintenance. Because it is possible to return, the worst case of stopping the operation of the system can be avoided.

As a result, introduction and maintenance of a duplicated disk can be performed without special knowledge of the system, and an administrator is not required to operate the duplicated disk. For this reason, a duplicate database can be set up in a branch or office, and the branch or office can store its own sales data, etc.
It greatly contributes to maintenance work and functional improvement of large-scale online systems.

[0111]

As described above, the present invention has the following effects. (1): Based on the identification information and the management information, the duplex state management unit determines whether to activate the control unit, activate the installation unit, activate the redundancy restoration unit, or display a message on the display unit. Therefore, the system can automatically start up necessary parts or display messages, and the installation and maintenance of the dual storage medium can be performed without special knowledge about the system.

(2): When one of the redundant storage media is broken and replaced with a maintenance medium, the initial state is set in the maintenance medium, so that the redundant state management unit activates the redundant restoration unit. Therefore, the maintenance person can automatically restore the duplex state simply by replacing the defective storage medium with the maintenance medium.

(3): When one of the redundant storage media that is operating normally is replaced with a maintenance medium for preventive maintenance,
By setting the initial state in the maintenance medium,
Since the duplication state management unit activates the duplication restoring unit and restores the duplex state, the maintenance staff can automatically restore the duplex state simply by replacing the storage medium with the maintenance medium.

(4): When the maintenance medium is replaced with an intact duplicate storage medium when one of the duplicate storage media is broken, the duplication state management unit activates the display unit and the display unit informs the display unit. Is displayed, it is possible to prevent data on the duplicated storage medium from being lost due to an erroneous operation of a maintenance person.

(5): If a defect occurs in the maintenance medium replaced during the duplexing restoration processing, the duplexing state management unit restores the medium before replacement by restoring the medium before replacement. Can automatically restore the state before maintenance simply by returning the storage medium before replacement.

(6): When the maintenance work on the duplicated storage medium is incomplete and the installation on the duplicated storage medium is attempted, the duplicated state management unit completes the restoration of the broken duplicated storage medium on the display unit. Since the display to the effect that the installation is to be performed is performed, the loss of the data on the dual storage medium due to the erroneous operation of the maintenance staff can be prevented.

(7): When one set of redundant storage media is newly installed, the redundant state management unit starts the installation unit, so that the installation is automatically performed, so that it is possible to prevent forgetting to install.

(8): If the work is interrupted due to a power failure or the like during the installation to the dual storage medium,
Since the duplex state management unit starts the installation unit, the installation is automatically performed by restarting the system. Therefore, it is possible to prevent the system from being operated without completing the installation.

(9): If the work is interrupted due to a power failure or the like during the duplication restoring process of the duplicate storage medium, the duplication state management unit starts the duplication restoring unit at the time of restart, so that it is automatically restarted. Since the duplication restoration processing is performed, it is possible to prevent the system from operating without the duplication restoration being completed.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of a duplex disk device according to the embodiment.

FIG. 3 is an explanatory diagram of a dual disk management device according to the embodiment.

FIG. 4 is an explanatory diagram of a determination matrix in the embodiment.

FIG. 5 is an explanatory diagram of identification information and management information in the embodiment.

FIG. 6 is a processing flowchart (1) of a duplex state management unit according to the embodiment.

FIG. 7 is a processing flowchart (2) of the duplex status management unit in the embodiment.

FIG. 8 is a processing flowchart (1) of an OS unit according to the embodiment.

FIG. 9 is a processing flowchart (2) of the OS unit according to the embodiment.

FIG. 10 is a processing flowchart of an installation unit in the embodiment.

FIG. 11 is a processing flowchart of a duplexing restoration unit according to the embodiment.

[Explanation of symbols]

 1a, 1b Duplex storage medium 2 Duplex state management unit 3a Control unit 4 Installation unit 5 Duplex restoration unit 6 Display unit 7 Maintenance medium 11a, 11b Identification information 12a, 12b Management information 71 Initial state

Claims (9)

[Claims] A plurality of duplex storage media for duplicating and maintaining information; a duplex status management unit for managing a duplex status of the information; a control unit for controlling access to the duplex storage medium; An installation unit for performing installation on a medium, a duplexing restoration unit for restoring the duplex state of the duplex storage medium, and a display unit for displaying a message, wherein the duplex storage medium uniquely identifies a pair of the media. Providing identification information and management information for managing a duplicated storage state, the duplicated state management unit, based on the identification information and the management information, activates the control unit, activates the installation unit, A redundant storage management device, which determines whether to activate a redundant restoration unit or display a message on the display unit. 2. When one of the dual storage media is broken and replaced with a maintenance medium, an initial state is set in the maintenance medium,
2. The duplicate storage management device according to claim 1, wherein the duplicate state management unit activates a duplicate restoration unit to restore the duplicate state. 3. When one of the redundant storage media that is operating normally is replaced with a maintenance medium for preventive maintenance, an initial state is set in the maintenance medium,
2. The duplicate storage management device according to claim 1, wherein the duplicate state management unit activates a duplicate restoration unit to restore the duplicate state. 4. When the maintenance medium is replaced with an intact duplicate storage medium when any of the duplicate storage media is broken, the duplex state management unit activates the display unit and displays the same on the display unit. 2. The dual storage management device according to claim 1, wherein a message to the effect is displayed. 5. When a failure occurs in the maintenance medium exchanged during the duplication restoration processing, the duplex state management unit restores the state before maintenance by returning the medium before exchange. 4. The dual storage management device according to claim 2 or 3, wherein: 6. If the maintenance work on the duplicate storage medium is incomplete and the installation on the duplicate storage medium is attempted, the duplication state management unit completes the restoration of the broken duplicate storage medium on the display unit. 2. The dual storage management device according to claim 1, wherein a message indicating that installation is to be performed is performed after that. 7. The duplicated storage management device according to claim 1, wherein when a pair of the duplicated storage media is newly installed, the duplicated state management unit starts an installation unit. 8. The duplication state management unit according to claim 1, wherein when the work is interrupted due to a power failure or the like while the installation to the duplicate storage medium is being performed, the duplication state management unit activates the installation unit when restarting. Redundant storage management device. 9. The duplication state management unit activates the duplication restoration unit when the operation is interrupted due to a power failure or the like during the duplication restoration processing of the duplicate storage medium when the operation is restarted. Dual storage management device.