JP2003345524A - Method for controlling storage controller and storage controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the increase of a bus use rate due to the copy of data from a master logical volume to sub-logical volumes or the deterioration of processing capabilities in a disk array device. <P>SOLUTION: In this control method of a storage controller having a plurality of controllers for writing data into a storage device in response to an instruction from an external device, a plurality of logical volumes being logical storage regions are composed in a storage region provided by the storage device, and the master logical volume and a plurality of sub-logical volumes to which the data of the master logical volume are copied are managed. In this case, the writing of data for copy in the master logical volume and the plurality of sub- logical volumes is executed in parallel. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method and a storage control device for a storage control device such as a disk array device.

[0002]

2. Description of the Related Art FIG. 1 shows a schematic configuration of a disk array device 10 which is an example of a storage control device. The disk array device 10 includes a communication interface 11 for performing communication with an external device 50 such as a host computer, a cache memory 12, a disk unit 60 as a mounted storage device, and writing / reading of data to / from the disk unit 60. , A bus 14 connecting the cache memory 12 and the drive controller 13, a controller for writing / reading data to / from the cache memory 12, controlling the communication interface 11 and the drive controller 13, and exchanging data with these controllers 15, a microprocessor 16 for executing various processes necessary for the operation of the device 10, a microprogram for executing the microprocessor 16 is stored, and a work memory and various setting information are stored. It comprises a control memory 17 to be used. The disk unit 60 may be externally attached to the disk array device 10.

The disk array device 10 organizes a plurality of logical volumes as logical storage areas on a storage area provided by one or more disk units 60. The relationship between the logical volume and the storage area of the disk unit 60, that is, the configuration of the logical volume is determined by the disk array device 10.
It is stored in a control memory 17 or the like.

When the controller 15 receives a data write request from the external device 50 via the communication interface 11, it writes the write data sent with the request to the cache memory 12, and when the write processing is completed, a write completion notification is sent. To the external device 50. The controller 15 writes the write data stored in the cache memory 12 to the logical volume specified by the write request at an appropriate timing.

On the other hand, the controller 15 has an external device 50
When the data read request is received from the external device 50, the data stored in a predetermined position of the logical volume specified by the request is read and transmitted to the external device 50.

[0006]

By the way, in the disk array device 10 having the above configuration, when the bus capacity (bus width) of the bus 14 connecting the controller 15 and the cache memory 12 is sufficiently ensured. Even when the utilization rate of the bus 14 increases, the effect on the processing speed of the disk array device 10 is often not a problem.

However, for example, in the disk array device 10 of a medium class or smaller, the capacity of the bus 14 cannot often be given a margin due to mounting restrictions due to the device size, and data writing / reading to / from the cache memory 12 is often performed. In this case, the utilization rate of the bus 14 may increase, and the performance of the disk array device 10 may decrease.

The problem here is that, for example, the disk array device 10 transfers a copy of data stored in an active logical volume (hereinafter referred to as a “primary logical volume”) to a backup logical volume (hereinafter referred to as a “primary logical volume”). , Which are also referred to as “secondary logical volumes”). That is, when such control is performed, data writing to the primary logical volume and the secondary logical volume for duplication and data transfer from the primary logical volume to the secondary logical volume occur frequently, and this data transfer is performed. According to the processing according to the above, data write / read processing to the cache memory 12 occurs frequently, and the utilization rate of the bus 14 increases. In this case, the processing capacity of the disk array device 10 may be reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control method of a storage control device and a storage control device capable of operating the storage control device efficiently.

[0010]

One of the main inventions of the present invention for achieving this object has a plurality of controllers for writing data to a storage device in response to an instruction from an external device, A storage control device that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by, and manages a primary logical volume and a plurality of secondary logical volumes in which data is duplicated. And writing the data for duplication to the primary logical volume and the plurality of secondary logical volumes in parallel. Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS === Summary of Disclosure === At least the following will be made clear by the following disclosure.

A plurality of controllers for writing data to a storage device in response to an instruction from an external device are provided. A plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device, and a positive logical A method of controlling a storage control device that manages a volume and a plurality of secondary logical volumes in which data replication is performed, wherein writing of the data for replication to the primary logical volume and the plurality of secondary logical volumes is performed in parallel. And a control method for the storage control device.

Here, the controller is, for example, an MPU.
(Microprocessing Unit), and corresponds to the controller 15 in an embodiment described later. By writing data for replication to the primary logical volume and the plurality of secondary logical volumes in parallel in this way, the period during which the bus utilization rate increases is shortened, and the storage controller can operate efficiently. it can.

A plurality of controllers for writing data to a storage device in response to an instruction from an external device are provided. A plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device, and a logical A method of controlling a storage controller that manages a volume and a plurality of secondary logical volumes in which data is replicated, wherein only the data writing for the replication to the primary logical volume and one of the secondary logical volumes is performed. A method for controlling a storage control device, which is performed in parallel.

According to this control method, data writing for duplication is always performed only on a set of the primary logical volume and the secondary logical volume. The control device can be operated efficiently.

A plurality of controllers for writing data to a storage device in response to an instruction from an external device are provided. A plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device. A method of controlling a storage controller that manages a volume and a plurality of secondary logical volumes in which data replication is performed, wherein data of a primary logical volume to be replicated from the primary logical volume to the secondary logical volume is transferred. Transferring to a secondary logical volume, and while performing the transfer from the primary logical volume to one of the secondary logical volumes, do not perform the transfer to the secondary logical volume different from the secondary logical volume; A control method for a storage control device, comprising:

In this control method, data transfer from the primary logical volume to the secondary logical volume is always performed only between a pair of primary logical volume and secondary logical volume, thereby reducing the bus utilization. As a result, the storage control device can be operated efficiently.

The storage device has a plurality of controllers for writing data to a storage device in response to a data write command from an external device and performing the data writing. A method of controlling a storage control device that organizes logical volumes and manages a primary logical volume and a plurality of secondary logical volumes in which data is replicated, wherein the storage controller controls the primary logical volume and at least one of the secondary logical volumes. Performing the data writing for the duplication in parallel,
A method for controlling a storage control device, wherein the data writing to at least two of the secondary logical volumes is performed in parallel.

As described above, by performing data writing for replication between the secondary logical volume and the secondary logical volume in parallel, data writing for replication is performed only between the primary logical volume and the secondary logical volume. The period during which the bus utilization rate increases is shorter than in the case where the storage control is performed, and the storage control device can be operated efficiently.

A plurality of controllers for writing data to a storage device in response to an instruction from an external device are provided. A plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device, and a positive logical A method for controlling a storage controller that manages a volume and a plurality of secondary logical volumes in which data is duplicated, wherein the primary logical volume and at least one secondary logical volume A
The data writing for the duplication is performed in parallel, the data of the secondary logical volume A is transferred to another secondary logical volume B, and during the transfer, the primary logical volume and the secondary A method for controlling a storage control device, wherein data writing to a logical volume A is not performed in parallel.

As described above, while data of the secondary logical volume A is being transferred to another secondary logical volume B, data writing to the primary logical volume and the secondary logical volume A is not performed in parallel. Therefore, the bus utilization can be suppressed, and the storage control device can be operated efficiently.

A plurality of controllers for writing data to a storage device in response to an instruction from an external device are provided. A plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device. A method for controlling a storage controller that manages a volume and a plurality of sub-logical volumes in which data is duplicated, wherein data writing for duplication to the primary logical volume and one sub-logical volume A is performed in parallel. And transfer the data of the secondary logical volume A to another plurality of secondary logical volumes B, and do not perform the transfer while writing the data to the secondary logical volume A;
A control method for a storage control device, comprising:

As described above, the transfer is not performed while the data is being written to the secondary logical volume A, so that the bus utilization rate can be kept low, and the storage controller can operate efficiently. it can.

In the above, when the storage control device records the data of the secondary logical volume on a backup recording medium, for example, the data is transferred from the primary logical volume to the secondary logical volume. After matching the contents of the secondary logical volume with the contents of the primary logical volume, the secondary logical volume is recorded on the recording medium.

In response to a data write / read request from an external device, data is written / read to / from a storage device, and a plurality of logical volumes as logical storage areas are organized in a storage area provided by the storage device. Means for storing a plurality of controllers for writing / reading data to / from a logical volume, means for storing associations between the respective logical volumes and the controllers for performing the respective processes, and responding to the data write / read requests in accordance with the associations Means for causing the corresponding controller to execute data write / read processing, and managing a primary logical volume and a plurality of secondary logical volumes in which the data is replicated, and managing the primary logical volume and its data from among the logical volumes. Specify the combination with the secondary logical volume to be copied. And storing the specified combination, performing data transfer from the primary logical volume to the corresponding secondary logical volume according to the combination, and determining whether the logical volume designated as the primary logical volume and the logical volume designated as the secondary logical volume And storing the combination of the primary logical volume and the secondary logical volume only when it is specified to be processed by the same controller.

According to this method, a logical volume controlled by a different controller is not registered as a primary / secondary combination, and a plurality of logical volumes controlled by a plurality of controllers during data transfer from the primary logical volume to the secondary logical volume are prevented. An increase in traffic can be suppressed, and a decrease in the processing capacity of the disk array device can be prevented.

Data is written / read to / from a storage device in response to a data write / read request from an external device, and a plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device. A method of controlling a storage control device including a plurality of controllers that manages a logical volume and a plurality of sub-logical volumes in which data is duplicated and performs data write / read processing on the logical volume. During the control in the mode permitting the data transfer from the primary logical volume to the secondary logical volume, the same controller performs writing / reading of data of the primary logical volume and the secondary logical volume, and Data transfer from the primary logical volume to the secondary logical volume for Prohibition control in a mode that the control method of a storage controller, characterized in that, the different controllers are respectively performed reading / writing data of the said primary logical volume secondary logical volume.

Here, the control in the mode in which the data transfer is permitted is, for example, a control in a normal mode described later, and the control in the mode in which the data transfer is prohibited is, for example, a split mode described later. Control. According to this method, during a period in which traffic between a plurality of controllers is likely to rise, the same controller performs processing relating to data writing / reading of the primary logical volume and the secondary logical volume. The above processing is performed by different controllers.
That is, efficient control of the controller according to the control state of the storage control device becomes possible, and the storage control device can be used efficiently.

A storage control device for writing data to a storage device in response to a data write command from an external device, wherein the storage control device controls writing of the data to the storage device and logically controls the storage device. And a processing unit that manages the data as a plurality of logical volumes, wherein the processing unit is configured by at least one primary logical volume that writes the data set by the processing unit and the processing unit The processor manages a plurality of secondary logical volumes for duplicating the primary logical volume, and the processing unit synchronizes at least one of the plurality of secondary logical volumes with writing of the data to the primary logical volume. And sequentially selecting the data as a secondary logical volume in which the data is updated.

Here, the processing unit corresponds to, for example, a microprogram stored in the control memory 17 or the like provided in the above-described disk array device and a microprocessor 16 executing the microprogram. In this storage control device, the processing unit sequentially selects at least one of the plurality of secondary logical volumes as a secondary logical volume whose data is updated in synchronization with writing of data to the primary logical volume. ing. Here, a specific example of the control of “the data is updated in synchronization” is control in a normal mode described later. In this way, the processing unit sequentially selects the secondary logical volumes for which data is updated synchronously, so that the contents of the primary logical volume are synchronously reflected in the unselected secondary logical volumes. Without
In these unselected secondary logical volumes, past data is held, and data history management becomes possible.

<Embodiment 1> Next, a technique for improving the processing performance of a disk array device having the configuration shown in FIG. 1 as an example of a storage control device will be described in detail with reference to FIG. In the following description, the disk array device writes / reads data to / from a primary logical volume and a plurality of secondary logical volumes in response to a data write / read request sent from the external device 50, and It is assumed that the copy of the data is controlled to be stored also in a plurality of secondary logical volumes.

In the following embodiment, when the data of the primary logical volume is backed up to a predetermined recording medium such as a cartridge tape or a DVD-ROM in a LAN-free backup system or the like, first,
Data writing being performed in parallel to the primary logical volume and the secondary logical volume for replication is interrupted (the operating state during this interruption is referred to as "split mode").
Next, during the control in the split mode, the data of the secondary logical volume is written to the recording medium. When the writing to the recording medium is completed, the operation is switched to an operation of writing data in parallel to the primary logical volume and the secondary logical volume again (this operation is referred to as “normal mode”).

Data consistency is not ensured between the primary logical volume and the secondary logical volume during operation in the split mode. For this reason, the disk array device 10 grasps data that has not been reflected in the secondary logical volume during operation in the split mode. The disk array device 10 transmits the unreflected data to, for example,
The presence or absence of update for each storage area unit partitioned on the primary logical volume is grasped by a bit map corresponding to bits. The bitmap is managed, for example, on the control memory 17 or the like.

For example, after copying to the recording medium, the disk array device 10 transfers unreflected data grasped from the bit map from the primary logical volume to the secondary logical volume (hereinafter, this processing is referred to as “resync”). Process)), the contents of the primary logical volume and the contents of the secondary logical volume are matched. And the disk array device 10
Restarts operation in the normal mode again after matching the contents of the primary logical volume and the secondary logical volume after the copy processing by resync processing.

In the embodiment shown in FIG. 2A, writing of data for duplication to the primary logical volume and a plurality of secondary logical volumes is performed in parallel. Here, “in parallel” is not limited to the case where both the start time and the end time match, but also includes the case where the time period in which data writing for duplication is performed is substantially the same (also in the following embodiments). The same is true). By writing data for replication to the primary logical volume and the plurality of secondary logical volumes in parallel in this manner, the period during which the bus utilization rate increases is shortened, and the disk array device 10 operates efficiently. Can be.

In the embodiment shown in FIG. 2B, only data writing for duplication to the primary logical volume and one secondary logical volume is performed in parallel. Specifically, for example, on Monday, data writing for replication is performed only on the primary logical volume and the secondary logical volume (month), and data is not written on the other secondary logical volumes (Tuesday to Friday). To do. According to this control method, data writing for replication is always performed only on a set of the primary logical volume and the secondary logical volume. Can be operated efficiently. Further, according to this control method, the data of the primary logical volume at the time of the previous data write is held in each secondary logical volume until the next data write. The history management of the data of the logical volume can also be performed.

In FIG. 2C, the data of the primary logical volume to be copied from the primary logical volume to the secondary logical volume is transferred to the secondary logical volume, and the transfer from the primary logical volume to one secondary logical volume is performed. During the transfer, the transfer to a secondary logical volume different from the secondary logical volume is not performed.

In the control method of this embodiment, the data transfer from the primary logical volume to the secondary logical volume is always performed only between a pair of primary logical volume and secondary logical volume, so that the bus utilization is reduced. Reduction is achieved, and the disk array device 10 can be operated efficiently.
Also, as in the case of FIG. 2B, the contents of the primary logical volume at the time of the previous data transfer are held in each secondary logical volume in this embodiment, and Data history management can also be performed.

In the embodiment shown in FIG. 1D, data writing for copying to the primary logical volume and at least one secondary logical volume is performed in parallel, so that copying of data of the primary logical volume is performed to a specific secondary logical volume. The data is stored in a volume, and data writing to at least two sub-logical volumes including these specific sub-logical volumes and other sub-logical volumes is performed in parallel.

As described above, by performing data writing for replication between the secondary logical volume and the secondary logical volume in parallel, data writing for replication is performed only between the primary logical volume and the secondary logical volume. The period during which the bus utilization rate increases is shorter than in the case of performing the operation, and the disk array device 10 can be operated efficiently. In addition, access to the primary logical volume due to data writing for duplication is reduced, and it is possible to suppress the effect of the processing for duplication on production operations and the like.

In the embodiment shown in FIG. 1E, data writing for replication to the primary logical volume and at least one secondary logical volume A is performed in parallel, and the data of the secondary logical volume A is transferred to another secondary logical volume B. During the transfer, data writing to the primary logical volume and the secondary logical volume A is not performed in parallel.

As described above, while data of the secondary logical volume A is being transferred to another secondary logical volume B, data writing to the primary logical volume and the secondary logical volume A is not performed in parallel. Thus, the bus utilization can be suppressed, and the disk array device 10 can be operated efficiently.

In the embodiment shown in FIG. 2 (f), data writing for replication to the primary logical volume and one secondary logical volume A is performed in parallel, and the data of the secondary logical volume A is transferred to another plurality of secondary logical volumes. B, and while the data is being written to the secondary logical volume A, the transfer is not performed.

As described above, the transfer is not performed while the data is being written to the secondary logical volume A, so that the bus utilization rate can be suppressed and the disk array device 10 can be operated efficiently. Can be.

Note that FIGS. 2A to 2F described above.
Is particularly effective when applied to a disk array device 10 of a medium-sized class or lower, which cannot afford a sufficient capacity of the bus, as described above.

<Embodiment 2> Japanese Patent Application Laid-Open No. 9-146842 discloses, for example, a disk array device 10 having a plurality of controllers 15 redundantly. FIG.
FIG. 1 shows a block configuration of such a disk array device 10 as an example. Incidentally, in the disk array device 10 of the middle class (midrange class) or lower recently, such a configuration is actively adopted for the purpose of improving the disaster recovery performance and the processing speed. Is coming.

According to the above-mentioned publication, in the disk array device 10 having such a configuration, exclusive control is performed by associating a logical volume to be controlled by each controller 15 in advance with each redundant controller 15. A mechanism for reducing the traffic on the communication path 20 connecting the controllers 15 and increasing the speed of the disk array device 10 which is generated for the purpose of, for example, is disclosed. Here, the logical volumes controlled by the respective controllers 15 are disclosed here. Is assigned, when a combination of a primary logical volume and a secondary logical volume is configured, if the controllers 15 that control the two are different, for example,
When data is transferred from the primary logical volume to the secondary logical volume, the utilization of the communication path 20 connecting the plurality of controllers 15 increases due to the communication between the controllers, which lowers the processing capacity of the disk array device 10. become. The second embodiment described here relates to a mechanism for preventing a reduction in the processing capacity of the disk array device 10 when data is transferred from the primary logical volume to the secondary logical volume for such replication.

Specifically, when an operator or the like registers a combination of a primary logical volume and a secondary logical volume in the disk array device 10, the logical volume specified as the primary logical volume and the secondary logical volume are designated by the operator or the like. When the logical volumes are associated with each other so as to be controlled by different controllers 15, registration of such a combination is not permitted (not stored).

FIG. 4 is a flowchart specifically illustrating the mechanism of this embodiment. An operator or the like operates the management terminal 70 functioning as a user interface for performing various settings for the disk array device 10, and
A setting screen shown in FIG. 5 is displayed to designate a combination of the primary logical volume and the secondary logical volume (401).

The setting screen displays information such as the ID of the defined logical volume, the ID of the controller that controls each logical volume, and the ID of the logical volume that is the partner of the primary / secondary combination. These pieces of information are stored in the management table 80 stored in the disk array device 10. These pieces of information are previously registered by an operator or the like or automatically. In the management table 80, the ID of the controller that controls each logical volume, and the ID of the logical volume of the other party are registered for the logical volume in which the combination of primary and secondary has already been registered.

The combination of the primary logical volume and the secondary logical volume to which the data of the primary logical volume is transferred is determined by the operator or the like in the setting screen in the column of the ID of the logical volume which is the partner of the primary / secondary combination. It can be specified by inputting an ID. It should be noted that a plurality of secondary logical volumes can be associated with one primary logical volume.

When this designation is made (402), the management terminal 70 checks whether or not the two designated logical volumes are in charge of processing by the same controller (403).
Here, this check is performed with reference to the management table 80.

As a result of the investigation, if a different controller is associated with each logical volume, an error message indicating that the two logical volumes cannot form a primary / secondary combination is displayed (404), and another two logical volumes are again displayed. Prompt for a logical volume.

On the other hand, when each logical volume is controlled by the same controller, the combination of the logical volumes is stored (registered in the management table 80) (405).

With the above-described mechanism, logical volumes controlled by different controllers 15 are not registered as a primary / secondary combination. As a result, it is possible to suppress the occurrence of traffic between the plurality of controllers 15 when data is transferred from the primary logical volume to the secondary logical volume, and to prevent a reduction in the processing capacity of the disk array device 10.

In the above mechanism, the same controller 15 performs writing / reading of data in the primary logical volume and the secondary logical volume during the control in the normal mode, and performs the normal control during the control in the split mode. Different controllers 15 may write and read the data of the logical volume and the secondary logical volume, respectively. According to this control method, efficient control of the controller 15 according to the state of control of the disk array device 10 becomes possible, and efficient use of the storage control device becomes possible.

[0057]

As described above, according to the present invention, the storage control device can be operated efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram showing a block configuration of a disk array device 10 which is an example of a storage control device.

FIGS. 2A to 2F are diagrams illustrating a technique for improving the processing performance of a disk array device according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a block configuration of a disk array device configured to redundantly include a plurality of controllers, for explaining an embodiment of the present invention;

FIG. 4 is a diagram illustrating a flowchart for explaining a mechanism according to a second embodiment of the present invention.

FIG. 5 is a diagram showing an example of a management table according to an embodiment of the present invention.

[Explanation of symbols]

10 Disk array device (storage control device) 12 Cache memory 15 Controller 60 disk unit (storage device)

Claims (19)

[Claims] A plurality of controllers for writing data to a storage device in response to an instruction from an external device, a plurality of logical volumes as logical storage areas organized in a storage area provided by the storage device, What is claimed is: 1. A method of controlling a storage control device that manages a primary logical volume and a plurality of secondary logical volumes in which data replication is performed, comprising: writing data for the replication to the primary logical volume and the plurality of secondary logical volumes. Are performed in parallel with each other. 2. A system comprising: a plurality of controllers for writing data to a storage device in response to an instruction from an external device; a plurality of logical volumes, which are logical storage areas, organized in a storage area provided by the storage device; A method for controlling a storage control device that manages a primary logical volume and a plurality of secondary logical volumes in which data is replicated, wherein the data writing for the replication is performed on the primary logical volume and one of the secondary logical volumes. A method of controlling a storage control device, wherein only the control is performed in parallel. 3. A plurality of controllers for writing data to a storage device in response to an instruction from an external device, wherein a plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device. A method of controlling a storage control device that manages a primary logical volume and a plurality of secondary logical volumes in which data is replicated, comprising: a primary logical volume that is to be replicated from the primary logical volume to the secondary logical volume. While the data is transferred to the secondary logical volume and the transfer from the primary logical volume to one of the secondary logical volumes is being performed, the transfer to the secondary logical volume different from the secondary logical volume is not performed. A method for controlling a storage control device. 4. A system comprising: a plurality of controllers that write data to a storage device in response to an instruction from an external device; and a plurality of logical volumes that are logical storage areas are organized in a storage area provided by the storage device. A method for controlling a storage control device that manages a primary logical volume and a plurality of secondary logical volumes in which data replication is performed, wherein the data for the replication to the primary logical volume and at least one of the secondary logical volumes is provided. A method for controlling a storage controller, wherein writing is performed in parallel, and the data writing to at least two of the secondary logical volumes is performed in parallel. 5. A storage system comprising: a plurality of controllers for writing data to a storage device in response to an instruction from an external device; a plurality of logical volumes, which are logical storage regions, organized in a storage region provided by the storage device; A method of controlling a storage control device that manages a primary logical volume and a plurality of secondary logical volumes in which data is replicated, wherein the primary logical volume and at least one of the secondary logical volumes A are replicated for the secondary logical volume A. Data writing is performed in parallel, data of the secondary logical volume A is transferred to another secondary logical volume B, and the data writing to the primary logical volume and the secondary logical volume A is performed during the transfer. Are not performed in parallel with each other. 6. A plurality of controllers for writing data to a storage device in response to an instruction from an external device, and a plurality of logical volumes, which are logical storage areas, are organized in a storage area provided by the storage device. What is claimed is: 1. A method for controlling a storage controller that manages a primary logical volume and a plurality of secondary logical volumes in which data replication is performed, comprising: writing data for the primary logical volume and one secondary logical volume A for the replication. Is performed in parallel, data of the secondary logical volume A is transferred to another plurality of secondary logical volumes B, and the transfer is not performed while the data is being written to the secondary logical volume A. A method for controlling a storage control device. 7. When the storage control device records the data of the secondary logical volume on a recording medium for backup, the contents of the secondary logical volume are transferred by transferring data from the primary logical volume to the secondary logical volume. 7. The control method for a storage control device according to claim 1, wherein the data is recorded on the recording medium after the contents are matched with the contents of the primary logical volume. 8. A data write / read process is performed on a storage device in response to a data write / read request from an external device, and a plurality of logical volumes, which are logical storage areas, are stored in a storage area provided by the storage device. A plurality of controllers for organizing and writing / reading data to / from a logical volume, means for storing associations between the respective logical volumes and the controllers for performing the respective processes, and the data write / read request in accordance with the associations Means for causing the corresponding controller to execute data write / read processing corresponding to the above, managing a primary logical volume and a plurality of secondary logical volumes in which the data is duplicated, and Combination with the secondary logical volume where the data is replicated Is stored, the specified combination is stored, data is transferred from the primary logical volume to the corresponding secondary logical volume according to the combination, and the logical volume designated as the primary logical volume and the logical volume designated as the secondary logical volume A control method for a storage control device, characterized in that the combination of a primary logical volume and a secondary logical volume is stored only when it is specified that a volume is processed by the same controller. 9. A data write / read to / from a storage device in response to a data write / read request from an external device, and a plurality of logical volumes which are logical storage areas are organized in a storage area provided by the storage device. And a control method for a storage control device including a plurality of controllers for managing a primary logical volume and a plurality of secondary logical volumes in which data is duplicated, and for performing data write / read processing on the logical volume, During control in the mode permitting the data transfer from the primary logical volume to the secondary logical volume for duplication, the same controller performs writing / reading of data in the primary logical volume and the secondary logical volume, The data from the primary logical volume for the duplication to the secondary logical volume During control of the mode for prohibiting the transfer control method of the storage controller, wherein, the different controllers are respectively performed reading / writing data of the primary logical volume and the secondary logical volume. 10. A plurality of controllers for writing data to a storage device in response to an instruction from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, The storage control device, wherein writing of the data for duplication to the primary logical volume and the plurality of secondary logical volumes is performed in parallel. 11. A plurality of controllers for writing data to a storage device in response to a command from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, The storage control device, wherein only the data writing for the duplication to the primary logical volume and one of the secondary logical volumes is performed in parallel. 12. A plurality of controllers for writing data to a storage device in response to an instruction from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, While the data of the primary logical volume to be duplicated from the primary logical volume to the secondary logical volume is transferred to the secondary logical volume, and while the transfer from the primary logical volume to one of the secondary logical volumes is being performed, A storage control device that does not perform the transfer to the secondary logical volume different from the secondary logical volume. 13. A plurality of controllers for writing data to a storage device in response to a command from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, The data writing for the duplication to the primary logical volume and at least one of the secondary logical volumes is performed in parallel, and the data writing to at least two of the secondary logical volumes is performed in parallel. Control device. 14. A plurality of controllers for writing data to a storage device in response to an instruction from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, The data writing for the duplication to the primary logical volume and at least one secondary logical volume A is performed in parallel, and the data of the secondary logical volume A is transferred to another secondary logical volume B. The storage control device, wherein the writing of the data to the primary logical volume and the secondary logical volume A is not performed in parallel while the data is being written. 15. A plurality of controllers for writing data to a storage device in response to an instruction from an external device,
A storage controller that organizes a plurality of logical volumes that are logical storage areas in a storage area provided by a storage device, and manages a primary logical volume and a plurality of secondary logical volumes in which data is copied, The data writing for the duplication to the primary logical volume and the one secondary logical volume A is performed in parallel, and the data of the secondary logical volume A is transferred to another plurality of secondary logical volumes B. A storage control device, wherein the transfer is not performed while the data write to A is performed. 16. The storage control device according to claim 10, wherein when the storage control device records the data of the secondary logical volume on a backup recording medium, the storage control device deletes the data from the primary logical volume. A storage control device, wherein the contents of the secondary logical volume are made to match the contents of the primary logical volume by transferring the data to the secondary logical volume, and then the data is recorded on the recording medium. 17. A method for writing / reading data to / from a storage device in response to a data write / read request from an external device.
A plurality of controllers that perform read processing, organize a plurality of logical volumes that are logical storage areas in a storage area provided by the storage device, and perform data write / read processing on the logical volume, Means for storing an association with the controller in charge of processing, means for causing the corresponding controller to execute data write / read processing corresponding to the data write / read request in accordance with the association, Manages a plurality of secondary logical volumes in which data replication is performed, specifies a combination of a primary logical volume and a secondary logical volume in which data replication is performed from among the logical volumes, and stores the specified combination And a corresponding sub-theory from the primary logical volume according to the combination Data transfer to the volume is performed, and only when the logical volume designated as the primary logical volume and the logical volume designated as the secondary logical volume are in charge of processing of the same controller, the primary logical volume and the secondary logical volume A storage control device storing the combination. 18. A data write / read to / from a storage device in response to a data write / read request from an external device, and a plurality of logical volumes as logical storage areas are organized in a storage area provided by the storage device. A plurality of controllers for managing a primary logical volume and a plurality of secondary logical volumes on which data replication is performed, and performing a data write / read process on a logical volume; During the control in the mode permitting the data transfer to the secondary logical volume, the same controller performs writing / reading of the data of the primary logical volume and the secondary logical volume, and from the primary logical volume for the duplication. During control in a mode in which the data transfer to the secondary logical volume is prohibited It said primary logical volume and the possible secondary logical volume different controller data write / read of performs storage control device according to claim. 19. A storage control device for writing data to a storage device in response to a data write command from an external device, comprising: controlling writing of the data to the storage device; A processing unit that logically divides and manages the logical volumes as a plurality of logical volumes, wherein the processing unit sets at least one primary logical volume that writes the data set by the processing unit and the processing unit And a plurality of secondary logical volumes for performing the duplication of the primary logical volume, wherein the processing unit writes at least one of the plurality of secondary logical volumes into the primary logical volume. A storage control device for sequentially selecting the secondary logical volume in which the data is updated in synchronization with the secondary logical volume.