JP5224065B2 - Disk array device, management method thereof, and program - Google Patents

Description

The present invention relates to a disk array device used by a plurality of systems, a disk array device management method, and a program for realizing them.

  In recent years, in the IT field, the demand for disk array devices is increasing in order to cope with an increase in the amount of data handled by the system and an improvement in data access performance in the system. In addition, from the viewpoint of operation and management, it is also required to integrate storage (disk array devices) used in a plurality of systems.

  In general, when a plurality of disk array devices are integrated, a mechanism for dividing a single resource pool constructed by a plurality of disk array devices has been introduced (see, for example, Patent Document 1). Specifically, in the system disclosed in Patent Document 1, a plurality of disk array devices are coupled to each other, and each component necessary for providing the functions of the disk array device is once integrated. Thereafter, the function of the disk array device is provided to each system using the disk array device through means for logically extracting the function. According to such a mechanism, resource allocation can be changed flexibly.

  In addition, since the introduction, operation, and management of the disk array device requires a large cost, the demand for a hosting service that provides a part of the disk array device upon request is increasing. In the hosting service, the hosting company integrates multiple disk array devices, logically cuts out the functions of the disk array device, and provides the cut-out functions to the host device of the contractor receiving the service. To do.

JP 2003-256147 A

  However, when a plurality of disk array devices are integrated and functions are logically cut out and provided from there, the burden on the administrator of the disk array device increases. In addition, the disk array device is designed to perform management on the disk array device side, not on the host device side. Therefore, especially when the administrator on the disk array device side and the administrator on the host device side receiving the service are different, as in the hosting service, the administrator on the disk array device side as the service scale increases. This burden will increase further.

  Further, when a plurality of disk array devices are integrated and functions are logically cut out from the integrated disk array devices, it is difficult to completely separate information between the systems receiving the provision. For this reason, there is a possibility that the confidentiality of the information cannot be ensured when the users of the system to be provided are different.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and in a disk array device used in a plurality of systems, a disk array device that can reduce the burden on an administrator and improve the confidentiality of information between systems. And its management method and program.

In order to achieve the above object, a disk array device according to the present invention is a disk array device used by a plurality of systems,
Comprising a plurality of disc storage portions having one or more disks, a plurality of disk controllers for controlling the disk storage unit, and a dividing control management unit,
The division control management unit allocates one or two or more disk storage units and one or two or more disk controllers for each of the plurality of systems so as not to overlap between the systems,
The disk storage unit and the disk controller are controlled to function only for the assigned system,
Further, a transmission line connecting one system and the disk controller assigned to the one system is physically separated from a transmission line connecting another system and the disk controller assigned to the other system. It is characterized by establishing.

In order to achieve the above object, the management method for a disk array apparatus of the present invention may be utilized by a plurality of systems, and a plurality of disc storage portions having one or more disks, the control of the disk storage unit A method for managing a disk array device, comprising: a plurality of disk controllers that perform:
(A) assigning one or two or more disk storage units and one or two or more disk controllers to each of the plurality of systems so as not to overlap each other;
(B) A transmission line connecting one system and the disk controller assigned to the one system is physically connected from the transmission line connecting another system to the disk controller assigned to the other system. Establishing to be segregated, and
(C) The disk storage unit and the disk controller are controlled so as to function only with respect to the system assigned in the step (a).

Furthermore, in order to achieve the above object, a program of the present invention may be utilized by a plurality of systems, and a plurality of disks for performing a plurality of disc storage portions having one or more disks, the control of the disk storage unit A program for managing a disk array device with a controller by a computer,
In the computer,
(A) assigning one or two or more disk storage units and one or two or more disk controllers to each of the plurality of systems so as not to overlap each other;
(B) A transmission line connecting one system and the disk controller assigned to the one system is physically connected from the transmission line connecting another system to the disk controller assigned to the other system. Establishing to be segregated, and
(C) The disk storage unit and the disk controller are controlled to function only with respect to the system assigned in the step (a).

  With the above features, according to the present invention, it is possible to reduce the burden on the administrator and improve the confidentiality of information between systems in a disk array device used in a plurality of systems.

FIG. 1 is a block diagram showing a configuration of a disk array device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the relationship among the functional blocks constituting the division control management unit illustrated in FIG. FIG. 3 is a diagram illustrating an example of information stored in the connection server database sdb1 illustrated in FIG. FIG. 4 is a diagram showing an example of information stored in the division control database ddb1 shown in FIG. FIG. 5 is a diagram showing an example of information stored in the division control database ddb2 shown in FIG. FIG. 6 is a diagram illustrating an example of information stored in the division control database ddb3 illustrated in FIG. FIG. 7 is a diagram illustrating an example of information stored in the division control database ddb4 illustrated in FIG. FIG. 8 is a diagram showing an example of information stored in the storage disk database sdb2 shown in FIG. FIG. 9 is a flowchart showing the operation of the disk array device according to the embodiment of the present invention.

(Embodiment)
Hereinafter, a disk array device, a management method thereof, and a program according to an embodiment of the present invention will be described with reference to FIGS. First, the configuration of the disk array device will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a disk array device according to an embodiment of the present invention.

  As shown in FIG. 1, the disk array device 1 in the embodiment of the present invention is used by a plurality of systems. In the example of FIG. 1, a system 20 and a system 30 are shown as systems. Among these, the system 20 is a system owned by the company A, and includes a server s1 and a server s2. The system 30 is a system owned by the company B and includes a server s3. The server s1, the server s2, and the server s3 correspond to host devices that receive service provided by the disk array device 1.

Further, as shown in FIG. 1, the disk array apparatus 1 includes a disc storage portion E1～e 6, includes a disk controller Dc1～dc6, a division control management unit 10. Disc storage portion E1～e 6 each have one or two or more disks. Disk controller dc1~dc6 performs control of the disk storage unit corresponding one of the disc storage portion e1~e 6. In this specification, “disk” means an HDD (Hard Disk Drive).

  The division control management unit 10 allocates one or two or more disk storage units and one or two or more disk controllers for each system so as not to overlap each other. Further, the division control management unit 10 performs control so that the disk storage unit and the disk controller function only for the assigned system.

In the example of FIG. 1, the division control management unit 10 assigns the disk storage units e1 and e2 and the disk controllers dc1 and dc2 to the system 20, and makes them function only for the system 20. Also, the division control management unit 10 includes a disc storage portion E3～e 6, assigned to a disk controller dc3~dc6 the system 30 is made to function only these to the system 30.

  Further, the division control management unit 10 physically transmits a transmission line connecting one system and a disk controller assigned to this system from a transmission line connecting another system and the disk controller assigned to the other system. Establish to be separated. In the example of FIG. 1, the transmission line connecting the system 20 and the disk controllers dc1 and dc2 assigned thereto and the transmission line connecting the system 30 and the disk controllers dc3 to dc6 assigned thereto are physically separated from each other. Has been established.

  In this manner, in the disk array device 1, each disk controller and each disk storage unit that provide the function are physically divided and assigned to each system. For this reason, unlike the invention disclosed in Patent Document 1, it is not necessary to logically divide a plurality of disk array devices and to manage only one disk array device 1. good. Therefore, the burden on the administrator is reduced as compared with the invention disclosed in Patent Document 1, for example, even if the size of the disk array device 1 increases and the number of systems to be used increases.

  In the disk array device 1, a disk controller, a disk storage unit, and a data transmission path are prepared in a physically independent state for each system using the disk array device 1. For this reason, in the disk array device 1, the confidentiality of information between systems is remarkably improved as compared with the invention disclosed in Patent Document 1. That is, no data is leaked between the user using the servers s1 and s2 and the user using the server s3. In addition, in the disk array device 1, the mutual processing between these users is reliably suppressed from affecting the other party.

  Here, the configuration of the disk array device 1 in the present embodiment will be described more specifically with reference to FIGS. 2 to 8 in addition to FIG. FIG. 2 is a diagram illustrating the relationship among the functional blocks constituting the division control management unit illustrated in FIG.

  As shown in FIG. 1, in the present embodiment, the server s1 includes server ports h1 and h2. The server s2 includes server ports h3 and h4. The server s3 includes server ports h5 and h6. Each server port is used to connect each server to the disk array device 1.

  The disk array device 1 further includes cache memories m1 to m8, array ports p1 to p4 connected to the system 20 or 30, and port controllers pc1 to pc4 for controlling the array ports p1 to p4. The cache memories m1 to m8 are used by any of the disk controllers dc1 to dc6. In this embodiment, the transmission path connecting each system and each disk controller is constituted by an array port, a port controller, and a cache memory.

The division control management unit 10 allocates one or two or more cache memories m1 to m8 for each system so as not to overlap each other. In addition, the division control management unit 10 assigns one or two or more array ports p1 to p4 and one or two or more port controllers pc1 to pc4 so as not to overlap each other for each system.

  Each of the cache memories m1 to m8 constitutes a transmission path of the system to which the cache memory is assigned. Similarly, each of the array ports p1 to p4 constitutes a transmission path of the system to which the array port is assigned. Further, each of the port controllers pc1 to pc4 constitutes a transmission path of the system to which the port controller is assigned.

  As shown in FIGS. 1 and 2, in the present embodiment, the division control management unit 10 includes a division control unit div1 to div4, a connection server database sdb1, a division control database ddb1 to ddb4, and a storage disk database. sdb2. And the division | segmentation control management part 10 performs said allocation by these structures.

  Furthermore, in the present embodiment, the disk array device 1 can be constructed by a computer. In this case, the division control management unit 10 can be realized by installing a program to be described later on this computer and executing it.

  In the example of FIG. 1, the connection server database sdb1, the split control databases ddb1 to ddb4, and the storage disk database sdb2 are built inside the disk array device 1, but this embodiment is limited to this. It is not a thing. These databases may be constructed in a storage device of another computer connected to the disk array device 1.

  Next, allocation by the division control management unit 10 will be specifically described for each system with reference to FIGS. First, a case where the servers s1 and s2 of the system 20 owned by the company A are connected to the disk array device 1 and resources are allocated to them will be described.

  As shown in FIG. 1, in the present embodiment, the server port h1 of the server s1 and the server port h3 of the server s2 are connected to the array port p1 of the disk array device 1 via the switch device sw1. The server port h2 of the server s1 and the server port h4 of the server s2 are connected to the array port p2 of the disk array device 1 via the switch device sw2. The connection relationship r1 between the server port and the array port is stored in advance in the connection server database sdb1 via the division control management unit 10.

  FIG. 3 is a diagram illustrating an example of information stored in the connection server database sdb1 illustrated in FIG. As illustrated in FIG. 3, the connection server database sdb1 stores a table that specifies the relationship among the servers s1 and s2, the server ports h1 to h6, and the array ports p1 and p2. According to the table stored in the connection server database sdb1, the array port corresponding to the server port of each server can be detected using the “server” column as the primary key.

  As shown in FIG. 1, in the present embodiment, the connection between the server port and the array port is performed via the switch devices sw1 and sw2 that relay the connection between the two, but the switch devices sw1 and sw2 are connected. Does not affect the connection relationship r1.

  As shown in FIG. 1, the division control unit div1 assigns the array port p1 to the port controllers pc1 and pc2 in accordance with an instruction from the administrator of the disk array device 1. The division control unit div1 also assigns the array port p2 to the port controllers pc1 and pc2 in accordance with an instruction from the administrator of the disk array device 1.

  The connection relationship r2 between the array port and the port controller is stored in the division control database dbb1 via the division control unit div1 (see FIG. 4). The assignment of the port controller to the array controller corresponds to assigning the port controller to the corresponding system as a result.

FIG. 4 is a diagram showing an example of information stored in the division control database ddb1 shown in FIG. As shown in FIG. 4, the division control database ddb1 stores a table for specifying the relationship between the array ports p1 and p2 and the port controllers pc1 and pc2. According to the table stored in the division control database ddb1, the port controller corresponding to each array port can be detected using the “array port” column as a primary key.

  The division control unit div1 manages the connection relationship r2 between the array ports p1 and p2 and the port controllers pc1 and pc2, and each port controller pc1 and pc2 functions only for the assigned array ports p1 and p2. Control as follows. As a result, the servers s1 and s2 can only communicate via the port controllers pc1 and pc2, and cannot accept communications via other port controllers. In other words, the servers s1 and s2 can communicate only through the array ports p1 and p2, and do not accept communication from the array ports p3 and p4.

  As shown in FIG. 1, the division control unit div2 assigns the port controller pc1 to the cache memories m1 to m6 in accordance with an instruction from the administrator of the disk array device 1. The division control unit div2 also assigns the port controller pc2 to the cache memories m1 to m6 in accordance with an instruction from the administrator of the disk array device 1.

  The connection relationship r3 between the port controller and the cache memory is stored in the division control database ddb2 via the division control unit div2 (see FIG. 5). The allocation of the cache memory to the port controller corresponds to the allocation of the cache memory to the corresponding system as a result.

  FIG. 5 is a diagram showing an example of information stored in the division control database ddb2 shown in FIG. As illustrated in FIG. 5, the division control database ddb2 stores a table that specifies the relationship between the port controllers pc1 and pc2 and the cache memories m1 to m6. According to the table stored in the division control database ddb2, the cache memory corresponding to each port controller can be detected using the “port controller” column as a primary key.

  The division control unit div2 manages the connection relationship r3 between the port controllers pc1 and pc2 and the cache memories m1 to m6, and each cache memory m1 to m6 functions only for the assigned port controllers pc1 and pc2. Control as follows. As a result, the servers s1 and s2 can only communicate via the cache memories m1 to m6, and cannot accept communications via other cache memories.

  As shown in FIG. 1, the division control unit div3 allocates the cache memories m1 to m6 to the disk controller dc1 in accordance with an instruction from the administrator of the disk array device 1. The division control unit div3 also allocates the cache memories m1 to m6 to the disk controller dc2 in accordance with an instruction from the administrator of the disk array device 1.

  Note that the allocation of the disk controller to the cache memory corresponds to the allocation of the disk controller to the corresponding system as a result.

  FIG. 6 is a diagram illustrating an example of information stored in the division control database ddb3 illustrated in FIG. As shown in FIG. 6, the division control database ddb3 stores a table for specifying the relationship between the cache memories m1 to m6 and the disk controllers dc1 and dc2. According to the table stored in the division control database ddb3, the disk controller corresponding to each cache memory can be detected using the “cache memory” column as a primary key.

  The division control unit div3 manages the connection relationship r4 between the cache memories m1 to m6 and the disk controllers dc1 and dc2, and the disk controllers dc1 and dc1 function only for the allocated cache memories m1 to m6. Control as follows. As a result, the servers s1 and s2 can only communicate via the disk controllers dc1 and dc2, and cannot accept communications via the other disk controllers.

  As shown in FIG. 1, the division control unit div4 assigns the disk controller dc1 to the disk storage units e1 and e2 in accordance with an instruction from the administrator of the disk array device 1. The division control unit div4 also assigns the disk controller dc2 to the disk storage units e1 and e2 in accordance with an instruction from the administrator of the disk array device 1.

  The connection relationship r5 between the disk controller and the disk storage unit is stored in the division control database dbb4 via the division control unit div4 (see FIG. 7). Note that the allocation of the disk storage unit to the disk controller corresponds to the allocation of the disk storage unit to the corresponding system as a result.

  FIG. 7 is a diagram illustrating an example of information stored in the division control database ddb4 illustrated in FIG. As shown in FIG. 7, the division control database ddb4 stores a table for specifying the relationship between the disk controllers dc1 and dc2 and the disk storage units e1 and e2. According to the table stored in the division control database ddb4, the disk storage unit corresponding to each disk controller can be detected using the “disk controller” column as a primary key.

  The division control unit div4 manages the connection relationship r5 between the disk controllers dc1 and dc2 and the disk storage units e1 and e2, and the disk storage units e1 and e2 are only assigned to the assigned disk controllers dc1 and dc2. Control to function. As a result, the servers s1 and s2 can access only the disk storage units e1 and e2, and cannot access other disk storage units.

  As shown in FIG. 1, the disk storage unit e1 includes disks d1 to d3, and the disk storage unit e2 includes disks d4 to d6. The relationship r6 between the disk storage unit and the disks belonging thereto is stored in advance in the storage disk database sdb2 via the division control management unit 10.

  FIG. 8 is a diagram showing an example of information stored in the storage disk database sdb2 shown in FIG. As shown in FIG. 8, the storage disk database sdb2 stores a table for specifying the relationship between the disk storage units e1 and e2 and the disks d1 to d6. According to the table stored in the storage disk database sdb2, a disk belonging to each disk storage unit can be detected using the “disk storage unit” column as a primary key.

  Next, a case where the server s3 of the system 30 owned by the company B is connected to the disk array device 1 and resources are allocated to the server s3 will be described.

  As shown in FIG. 1, in the present embodiment, the server port h5 of the server s3 is connected to the array port p3 of the disk array device 1. The server port h6 of the server s3 is connected to the array port p4 of the disk array device 1. As shown in FIG. 3, as in the case of the company A described above, for the server s3, the connection relationship r1 between the server port and the array port is stored in advance in the connection server database sdb1 via the division control management unit 10. It is remembered.

  As shown in FIG. 1, the division control unit div1 assigns the array ports p3 and p4 to the port controllers pc3 and pc4 in accordance with an instruction from the administrator of the disk array device 1. As shown in FIG. 4, the connection relationship r2 between the array ports p3 and p4 and the port controllers pc3 and pc4 is also stored in the division control database dbb1 via the division control unit div1.

  The division control unit div1 manages the connection relationship r2 between the array ports p3 and p4 and the port controllers pc3 and pc4, and the port controllers pc3 and pc4 function only for the assigned array ports p3 and p4. Control as follows. As a result, the server s3 can only communicate via the port controllers pc3 and pc4, and cannot accept communication via other port controllers.

  As shown in FIG. 1, the division control unit div2 assigns the port controllers pc3 and pc4 to the cache memories m7 and m8 in accordance with an instruction from the administrator of the disk array device 1. As shown in FIG. 5, the connection relationship r3 between the port controllers pc3 and pc4 and the cache memories m7 and m8 is also stored in the division control database dbb2 via the division control unit div2.

  The division control unit div2 manages the connection relationship r3 between the port controllers pc3 and pc4 and the cache memories m7 and m8, and the cache memories m7 and m8 function only for the assigned port controllers pc3 and pc4. Control as follows. As a result, the server s3 can only perform communication via the cache memories m7 and m8, and cannot accept communication via other cache memories.

  As shown in FIG. 1, the division control unit div3 allocates the cache memories m7 and m8 to the disk controllers dc3 to dc6 in accordance with instructions from the administrator of the disk array device 1. As shown in FIG. 6, the connection relationship r4 between the cache memory and the disk controller is also stored in the division control database dbb3 via the division control unit div3.

  The division control unit div3 manages the connection relationship r4 between the cache memories m7 and m8 and the disk controllers dc1 and dc2, and the disk controllers dc3 to dc6 function only for the assigned cache memories m7 and m8. Control as follows. As a result, the server s3 can only perform communication via the disk controllers dc3 to dc6, and cannot receive communication via the other disk controllers.

  As shown in FIG. 1, the division control unit div4 assigns the disk controllers dc3 to dc6 to the disk storage units e3 to e6 in accordance with instructions from the administrator of the disk array device 1. As shown in FIG. 7, the connection relationship r5 between the disk controller and the disk storage unit is also stored in the division control database ddb4 via the division control unit div4.

  The division control unit div4 manages the connection relationship r5 between the disk controllers dc3 to dc6 and the disk storage units e3 to e6, and the disk storage units e3 to e6 are assigned only to the assigned disk controllers dc3 to dc6. Control to function. As a result, the server s3 can access only the disk storage units e3 to e6 and cannot access other disk storage units. As shown in FIG. 8, the relationship r6 between the disk storage units e3 to e6 and the disks d7 to d20 is also specified by the table stored in the storage disk database sdb2.

  The relationship r7 among the division control units div1 to div4, the connection server database sdb1, the division control databases ddb1 to ddb4, and the storage disk database sdb2 in the division control management unit 10 is as shown in FIG. The connection from the division control management unit 10 to each division control database is actually performed by exclusive processing by the corresponding division control unit.

Further, in this embodiment, the disc storage portion has the one or more disks as described above, RAID group may be configured for each disc storage portion. A logical unit may be configured for each disk storage unit.

  Next, the operation of the disk array device 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 9 is a flowchart showing the operation of the disk array device according to the embodiment of the present invention. In the present embodiment, the disk array device management method can be implemented by operating the disk array device 1. Therefore, the description of the disk array device management method in the present embodiment is replaced with the following description of the operation of the disk array device 1.

  As shown in FIG. 9, first, in the disk array device 1, the partition control management unit 10 receives an instruction when an external resource allocation instruction is given (step S <b> 1). In step S1, the division control management unit 10 stores the connection relation r1 between the server port and the array port of the instructed system in the connection server database sdb1.

  Next, the division control management unit 10 uses the division control units div1 to div4 to assign port controllers corresponding to the array ports to be used, and further assigns cache memory, disk controllers, and disk storage units. Perform (step S2). When step S2 is executed, a transmission path connecting the system and each disk controller is established by the array port, the port controller, and the cache memory.

  Next, the division control management unit 10 uses the division control units div1 to div4 to perform control so that each of the port controller, cache memory, disk controller, and disk storage unit functions only for the assigned target. Is executed (step S3). As a result of step S3, some of the resources of the disk array device 1 function only for the corresponding system, and are physically separated from the other parts.

  Thereafter, the division control management unit 10 ends the process when receiving an instruction to cancel the assignment. If the division control management unit 10 has not received an instruction to cancel the assignment, the division control management unit 10 repeatedly executes step S3.

  The program in the embodiment of the present invention may be a program that causes a computer to execute steps S1 to S4 shown in FIG. By installing this program on a computer that constructs the disk array device 1 and executing it, the division control management unit 10 can be realized. In this case, a CPU (Central Processing Unit) of the computer functions as the division control units div1 to div4 and performs processing.

  Further, a storage device such as an HDD provided in the computer functions as the connection server database sdb1, the split control databases ddb1 to ddb4, and the storage disk database sdb2. As described above, these databases may be constructed in a storage device of another computer connected to the disk array device 1.

  As described above, in the present embodiment, each component of the disk array device 1 is physically divided for each system, so that the influence between the systems is eliminated. In addition, since a corresponding part can be cut out for each system, individual management can be easily performed. Thus, the disk array device 1 is particularly useful when used in a large-scale system that emphasizes performance, scalability, and security, that is, a system with high mission criticality.

  Further, according to the disk array device 1, it becomes impossible to know the existence of other systems between the systems, and a completely independent environment is provided for each system. Therefore, the disk array device 1 is effective for a hosting business in which an unspecified number of users segregate and use the same disk array device.

  Further, the administrator of the disk array device 1 need only manage one disk array device 1. Further, the administrator only needs to manage the operation status of the entire apparatus, and individual management between the systems can be entrusted to the administrator on the user side. For this reason, the burden on the administrator of the disk array device 1 is much smaller than when a plurality of disk array devices are integrated and logically divided.

  Further, since the disk array device 1 can function in the same manner as a plurality of disk array devices, the use of the disk array device 1 achieves “integration of storage used in a plurality of systems” which has been recently required. You can also. Since the division is executed in units of the component parts of the disk array device 1, the flexibility as the existing logical division disclosed in Patent Document 1 cannot be expected. However, according to the disk array device 1, the device configuration is flexible. The degree can be increased.

  As described above, according to the present invention, in a disk array device used in a plurality of systems, it is possible to reduce the burden on the administrator and improve the confidentiality of information between systems. Therefore, the present invention is useful for a mission-critical system and a hosting business in which an unspecified number of users segregate and use the same disk array device.

1 disk array device 10 division control management unit 20 system (company A)
30 system (company B)
s1-s3 server h1-h6 server port sw1, sw2 switch device p1-p4 array port pc1-pc4 port controller m1-m8 cache memory dc1-dc6 disk controller e1-e5 disk storage part d1-d20 disk (HDD)

Claims (9)

A disk array device used by a plurality of systems,
A plurality of disc storage portions having one or more disks, a plurality of disk controllers for controlling the disk storage unit, a plurality of caches that are utilized and division control management unit, by one of the plurality of disk controllers A memory, a plurality of array ports connected to the system, and a plurality of port controllers for controlling the array ports ;
The division control management unit,
For each of the plurality of systems, one or more of the disk storage units, one or more of the disk controllers , one or more of the cache memories, and one or more of the port controllers , Assign them so that they do not overlap between the systems,
The disc storage portion, said disk controller, said cache memory, and said port controller, I line control to function only for the assigned the system, and each of the plurality of cache memories, said plurality of arrays Each of the ports and each of the plurality of port controllers establish the transmission path of the system to which they are assigned,
Thereby physically away minutes from the transmission line connecting the transmission line connecting the said disk controller assigned to one of the system with the one system, and the disk controller assigned to other systems and other systems A disk array device. Wherein a plurality of disc storage portions, respectively, said one or more disks, which constitutes one of the RAID group, a disk array apparatus according to claim 1. In each of the plurality of disc storage portions, said one or more disks, which constitutes one of the logical unit, the disk array apparatus according to claim 1. Used by any of the plurality of disk controllers, a plurality of disk storage units having one or two or more disks, a plurality of disk controllers for controlling the disk storage units, and the plurality of disk controllers. A method for managing a disk array device , comprising: a plurality of cache memories; a plurality of array ports connected to the system; and a plurality of port controllers for controlling the array ports ,
(A) For each of the plurality of systems, one or two or more disk storage units, one or two or more disk controllers , one or two or more cache memories, and one or two or more port controllers. And assigning so as not to overlap between the systems, and
(B) before SL disc storage portion, said disk controller, said cache memory, and said port controller, the controls to function only for the system that has been assigned in step (a), said plurality of Each cache memory, each of the plurality of array ports, and each of the plurality of port controllers establish the transmission path of the system to which they are assigned,
Accordingly, the transmission path connecting the one system and the disk controller assigned to the one system is physically changed from the transmission path connecting the other system and the disk controller assigned to the other system. And a step of separating the disk array device. Wherein a plurality of disc storage portions, respectively, said one or more disks, which constitutes one of the RAID group management method for a disk array apparatus according to claim 4. Wherein a plurality of disc storage portions, respectively, said one or more disks, which constitutes one of the logical unit management method for a disk array apparatus according to claim 4. Used by any of the plurality of disk controllers, a plurality of disk storage units having one or two or more disks, a plurality of disk controllers for controlling the disk storage units, and the plurality of disk controllers. A program for managing a disk array device by a computer , comprising a plurality of cache memories, a plurality of array ports connected to the system, and a plurality of port controllers for controlling the array ports. ,
In the computer,
(A) For each of the plurality of systems, one or two or more disk storage units, one or two or more disk controllers , one or two or more cache memories, and one or two or more port controllers. And assigning so as not to overlap between the systems, and
(B) before SL disc storage portion, said disk controller, said cache memory, and said port controller, the controls to function only for the system that has been assigned in step (a), said plurality of Each cache memory, each of the plurality of array ports, and each of the plurality of port controllers establish the transmission path of the system to which they are assigned,
Accordingly, the transmission path connecting the one system and the disk controller assigned to the one system is physically changed from the transmission path connecting the other system and the disk controller assigned to the other system. separated, the program characterized by executing the steps, the. Wherein a plurality of disc storage portions, respectively, said one or more disks, which constitutes one of the RAID groups, the program of claim 7. Wherein a plurality of disc storage portions, respectively, said one or more disks, which constitutes one of the logical unit, the program of claim 7.

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