JP2006139731A - Information processing apparatus, connection storage apparatus, storage control apparatus, and method and program for connection switch control - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erroneous operations for a disk array apparatus and improve its reliability. <P>SOLUTION: A main controller of a first SES function part 23<SB>1</SB>(a second SES function part 24<SB>1</SB>) compares an ID transmitted from a disk controller 2 and one based on the setting by an ID setting part 29<SB>1</SB>, and then determines propriety of the ID. If they are matched, the main controller determines that the set ID is approved and allows an HDD to be connected. On the other hand, if they are not matched and the set ID is not approved, the main controller allows the HDD to be bypassed and an error display part 31<SB>1</SB>to display an error. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information processing device, a linked storage device, a storage control device, a connection switching control method, and a connection switching control program, and an information processing device such as a disk array device in which storage devices such as disk devices are connected in a loop, The present invention relates to a linked storage device, a storage control device, a connection switching control method, and a connection switching control program.

Conventionally, a disk array device (a so-called RAID (Redundant Array of Inexpensive Disks) device) that uses a plurality of disk devices side by side to increase the speed of disk input / output, improve reliability, and reduce costs. It has been put into practical use.
The disk array device includes a disk controller and a JBOD storage unit having a plurality of JBOD (Just a Bunch Of Disks) devices including, for example, a plurality of magnetic disk devices (hereinafter referred to as HDD (Hard Dics Drive)). (For JBOD, see, for example, Patent Document 1).

Each JBOD device constituting the JBOD storage unit includes a plurality of HDDs and an enclosure service unit (hereinafter referred to as SES (Small (Small) Computer System Interface) (Enclosure Service) function unit) and an ID setting unit including a rotary switch for setting the ID of the JBOD device.
Here, since the cable connection configuration is simple and it is easy to cope with the expansion, each HDD is connected in a loop using, for example, a fiber channel FC-AL (Fibre Channel Arbitrated Loop). (For example, refer to Patent Document 2 and Patent Document 3.)
FC-AL conforms to ANSI (American National Standard Institute) FCS (Fibre Channel Fiber Standard), connects the ports of devices such as HDDs in a loop, and communicates only between a pair of ports. This is a connection form.

In addition, this disk array device stores and stores redundant data in a plurality of disk devices, so that even if a failure occurs in any disk device, it is stored in the failed disk device. The information is configured to be recoverable. A host computer is connected to the disk array device via a communication path.
When another JBOD device is newly added, an ID setting unit provided in the JBOD device is used to set an ID for mounting the JBOD, and then the JBOD device is connected to the JBOD storage unit in an online state.
When a new JBOD device is added, the disk controller performs loop initialization. Based on the setting by the ID setting unit, each disk HDD constituting the new JBOD device also has an ID (for example, loop address AL_PA (Arbitrated Loop). Physical Address)).

Special Table 2000-513476 JP 2003-150319 A JP-T-2001-523858

The problem to be solved is that, for example, when an inappropriate ID is set by the ID setting unit, the disk array device (disk controller, each HDD of the JBOD device, the SES function unit, etc.) operates improperly. It is a point that it causes.
For example, if the same ID is set for the JBOD device that is in operation for the additional JBOD device, the loop address of the HDD of the active JBOD device that has been acquired is prioritized and validated. If there is a slot in which an HDD is not mounted in an operating JBOD device, all of the JBOD devices to be added are mounted (JBOD to be added) If there are more HDDs mounted on the device), the disk controller incorrectly recognizes that the HDD is mounted even though no HDD is actually mounted in the slot with the same number. End up.

  In addition, if the HDD is degenerated due to a failure in the operating JBOD device and does not exist on the FC-AL, the HDD of the JBOD device to be added with an incorrect ID set will replace the degenerated HDD with the FC-AL. The upper loop address is acquired. Since the disk controller mistakenly assigns the HDD to which the loop address is assigned as a normal HDD, an error occurs in the HDD constituting the RAID, and the generated data also becomes an error. That is, if an HDD to which a loop address is assigned by mistake is accessed, data corruption occurs.

  In the worst case, a frame LIP (FF, AL_PS) or LIP (AL_PD, AL_PS) for resetting all devices for loop initialization (where LIP: Loop Initialization Primitive, FF: all ports, AL_PS: When Arbitrated Loop Physical Address Source (AL_PD: Arbitrated Loop Physical Address Destination) is issued from the disk controller, the loop address that was acquired by the HDD of the operating JBOD device will be returned to blank, so the RAID is configured. In some cases, the matching HDD cannot be matched with the corresponding loop address (ID). In this case, data corruption occurs.

Normally, the HDD employed in the disk array device is set to a mode in which it does not participate on the FC-AL when a loop address cannot be obtained by a hardware ID setting instruction.
As described above, JBOD devices having the same ID are not allowed to exist on the FC-AL, but conventionally, it has not been assumed that the ID of the added JBOD device is erroneously set. There was also no means for detecting an incorrect setting.

  The present invention has been made in view of the above circumstances. For example, even when an inappropriate ID is erroneously set by the ID setting unit, the disk array device is prevented from being illegally operated and the reliability is improved. It is an object of the present invention to provide an information processing device, a linked storage device, a storage control device, a connection switching control method, and a connection switching control program.

  In order to solve the above problems, the invention described in claim 1 is directed to at least one linked storage device having a plurality of storage devices connected in a loop, and a storage control device for controlling the linked storage device. A connection for performing setting / canceling for separating and bypassing the storage device by separating at least the identification symbol setting means for setting the identification symbol of the connection storage device. A switching means, a switching control means for controlling the connection switching means, and an identification symbol suitability determination means for judging the suitability of the identification symbol set by the identification symbol setting means, wherein the switching control means comprises the identification If the symbol suitability determining means determines that the identification symbol is appropriate, the connection switching means is controlled so that the bypass of each storage device is released and connected. When the identification symbol suitability determining unit determines that the identification symbol is inappropriate, the connection switching unit is controlled to perform bypass setting for each of the storage devices to be disconnected. .

  The invention according to claim 2 relates to the information processing apparatus according to claim 1, wherein the storage control device performs initialization processing when the linked storage device is connected, and the identification symbol setting means And an identification symbol assigning means for assigning an identification symbol based on the setting by the identification symbol assignment means, wherein the identification symbol suitability determining means assigns the identification symbol set by the identification symbol setting means by the identification symbol assignment means. By comparing with the identification symbol, the suitability of the identification symbol set by the identification symbol setting means is determined.

  According to a third aspect of the present invention, there is provided the information processing apparatus according to the first or second aspect, wherein each of the storage devices and the switching control means of the linked storage device are connected to the storage control device to form a closed circuit. The linked storage device has control connection switching means for setting / releasing to disconnect and bypass the switching control means, and the switching control means is powered on to the linked storage device. The control connection switching means is controlled so that the bypass of the switching control means is released and connected, and the connection switching means is controlled to set the bypass of each storage device and disconnected. Then, power is supplied to each of the storage devices.

  According to a fourth aspect of the present invention, there is provided the information processing apparatus according to the first, second, or third aspect, wherein the linked storage device has an identification symbol set by the identification symbol setting means by the identification symbol suitability determining means. Is characterized by having an error notification means for notifying that the identification symbol is inappropriate.

  According to a fifth aspect of the present invention, there is provided the information processing apparatus according to any one of the first to fourth aspects, wherein each of the storage devices and the switching control unit of the linked storage device and the storage control device are: It is characterized by being connected using a fiber channel arbitrated loop.

  A sixth aspect of the invention relates to the information processing apparatus according to any one of the first to fifth aspects, comprising a plurality of the linked storage devices, wherein the identification symbol setting means sets the identification symbol. The connected storage device is a connected storage device to be added.

  According to a seventh aspect of the invention, there is provided a linked storage device comprising a plurality of storage devices connected in a loop, controlled by the storage control device, and constituting an information processing device, and at least the linked storage device Identification symbol setting means for setting the identification symbol, connection switching means for setting / releasing to bypass the storage device and bypassing, switching control means for controlling the connection switching means, and identification symbol setting Identification symbol suitability determination means for determining the suitability of the identification symbol set by the means, and the switching control means, when the identification symbol suitability determination means determines that the identification symbol is appropriate, By controlling the connection switching means to release the bypass of each storage device and connecting the storage devices, the identification symbol suitability determining means determines that the identification symbol is inappropriate. If it is, by controlling the connection switching means, it is characterized by causing detached made to perform the setting of the bypass of the respective storage devices.

  The invention according to claim 8 relates to the concatenated storage device according to claim 7, wherein the storage control device performs initialization processing when the concatenated storage device is connected, and the identification symbol setting means. And an identification symbol assigning means for assigning an identification symbol based on the setting by the identification symbol assignment means, wherein the identification symbol suitability determining means assigns the identification symbol set by the identification symbol setting means by the identification symbol assignment means. By comparing with the identification symbol, the suitability of the identification symbol set by the identification symbol setting means is determined.

  A ninth aspect of the invention relates to the linked storage device according to the seventh or eighth aspect, wherein each of the storage devices, the switching control means, and the storage control device are connected to form a closed circuit. Control connection switching means for performing setting / cancellation for separating and bypassing the switching control means, and the switching control means controls the control connection switching means when the connected storage device is powered on. Then, the bypass of the switching control unit is released and connected, and the connection switching unit is controlled to set the bypass of each storage device and disconnect, and then the power is supplied to each storage device. It is characterized by being supplied.

  According to a tenth aspect of the present invention, in the linked storage device according to the seventh, eighth, or ninth aspect, the identification symbol set by the identification symbol setting unit is determined to be inappropriate by the identification symbol suitability determining unit. In this case, it has an error notification means for notifying that the identification symbol is inappropriate.

  An eleventh aspect of the present invention relates to the linked storage device according to any one of the seventh to tenth aspects, wherein each of the storage devices, the switching control means, and the storage control device is a fiber channel arbitrage. It is characterized by being connected using a ted loop.

  A twelfth aspect of the present invention relates to the linked storage device according to any one of the seventh to eleventh aspects, and is connected to the other linked storage device and sets the identification symbol by the identification symbol setting means. The connected storage device is a connected storage device to be added.

  According to a thirteenth aspect of the present invention, there is provided a storage control device that controls at least one linked storage device having a plurality of storage devices connected in a loop and constitutes an information processing device, wherein the linked storage is performed. The apparatus includes at least an identification symbol setting means for setting an identification symbol of the linked storage device, a connection switching means for performing setting / release for separating and bypassing the storage device, and a switching for controlling the connection switching means. Control means, and an identification symbol suitability judging means for judging the suitability of the identification symbol set by the identification symbol setting means. The switching control means is configured so that the identification symbol is proper by the identification symbol suitability judging means. If it is determined that there is, the connection switching means is controlled to release the bypass of each storage device and connected, and the identification symbol suitability determining means If it is determined that the identification symbol is inappropriate, the connection switching means is controlled to set the bypass of each storage device to be disconnected, and the storage control device is connected to the linked storage device. The identification symbol assigning means for performing the initialization process and assigning the identification symbol based on the setting by the identification symbol setting means, and the identification symbol suitability determining means is controlled by the identification symbol setting means. By comparing the set identification symbol with the identification symbol assigned by the identification symbol assigning means, the suitability of the identification symbol set by the identification symbol setting means is determined.

  The invention according to claim 14 relates to the storage control device according to claim 13, wherein the storage device and the switching control means of the linked storage device and the storage control device are connected to form a closed circuit. The linked storage device has control connection switching means for performing setting / release for separating and bypassing the switching control means, and the switching control means is configured such that when the power of the linked storage device is turned on, The control connection switching means is controlled to release the bypass of the switching control means to be connected, and the connection switching means is controlled to set the bypass of each storage device to be disconnected. Later, power is supplied to each of the storage devices.

  The invention according to claim 15 relates to the storage control device according to claim 13 or 14, wherein the connected storage device has an inappropriate identification symbol set by the identification symbol setting means by the identification symbol suitability determining means. If it is determined that the identification symbol is inappropriate, it has an error notification means for notifying that the identification symbol is inappropriate.

  According to a sixteenth aspect of the present invention, there is provided the storage control device according to the thirteenth, fourteenth, or fifteenth aspect, wherein each of the storage devices and the switching control means of the linked storage device and the storage control device include a fiber channel. It is characterized by being connected using an arbitrated loop.

  According to a seventeenth aspect of the present invention, there is provided the storage control device according to any one of the thirteenth to sixteenth aspects, wherein the plurality of linked storage devices are controlled and an identification symbol is set by the identification symbol setting means. The linked storage device is an added linked storage device.

The invention according to claim 18 relates to a connection switching control method for a plurality of storage devices that constitute an information processing device and are connected in a loop, and includes at least an identification symbol of a connected storage device comprising the plurality of storage devices. An identification symbol setting step set by the identification symbol setting means, a connection switching step for setting / releasing to disconnect and bypass the storage device by the connection switching means, and a switching control for controlling the connection switching means by the switching control means Steps,
An identification symbol suitability determination step for determining the suitability of the identification symbol set in the identification symbol setting step. In the switching control step, the identification symbol suitability determination step determines that the identification symbol is appropriate. In this case, the connection switching unit is controlled to release the bypass of each storage device and connected, and when it is determined in the identification symbol suitability determination step that the identification symbol is inappropriate, The connection switching means is controlled so that the bypass of each storage device is set and disconnected.

  A nineteenth aspect of the invention relates to a connection switching control method according to the eighteenth aspect, further comprising a storage control step of controlling the linked storage device by a storage control device, the storage control step comprising: An identification symbol assignment step for performing identification processing and assigning an identification symbol based on the setting in the identification symbol setting step when connected, and in the identification symbol suitability determination step, the identification symbol setting step By comparing the identification symbol set in the step with the identification symbol allocated in the identification symbol allocation step, the suitability of the identification symbol set in the identification symbol setting step is determined.

  The invention according to claim 20 relates to the connection switching control method according to claim 18 or 19, wherein the storage device and the switching control means are connected to the storage control device to form a closed circuit. A control connection switching step for performing setting / cancellation for separating and bypassing the switching control means by the control connection switching means, and when the connection storage device is turned on, the control connection switching step includes the control connection switching step. The switching means is controlled so that the bypass of the switching control means is released and connected, and in the switching control step, the connection switching means is controlled to set the bypass of each storage device. After the separation, power is supplied to each of the storage devices.

  The invention according to claim 21 relates to the connection switching control method according to claim 18, 19 or 20, wherein the identification symbol set in the identification symbol setting step is inappropriate in the identification symbol suitability determination step. An error notification step of notifying by an error notification means that the identification symbol is inappropriate when determined is included.

  A twenty-second aspect of the present invention relates to the connection switching control method according to any one of the eighteenth to twenty-first aspects, wherein each of the storage devices, the switching control means, and the storage control device is a Fiber Channel arbitration. It is characterized by being connected using a traited loop.

  The invention according to claim 23 relates to the connection switching control method according to any one of claims 18 to 22, wherein the linked storage device is connected to another linked storage device, and the identification symbol setting step includes: The connected storage device for setting the identification symbol is a connected storage device to be added.

  A connection switching control program according to a twenty-fourth aspect of the invention causes a computer to execute the connection switching control method according to any one of the eighteenth to twenty-third aspects.

  According to the configuration of the present invention, the switching control means controls the connection switching means to connect each storage device when the identification symbol suitability determining means determines that the identification symbol is appropriate, and to connect each storage device. When it is determined by the suitability determining means that the identification symbol is inappropriate, the connection switching means is controlled to disconnect each storage device. For example, when an inappropriate identification symbol is set by the identification symbol setting means In this case, since the storage device is not connected to the loop, it is possible to prevent the occurrence of problems such as garbled data, to prevent unauthorized operation of the disk array device, and to improve the reliability.

  The switching control means controls the connection switching means to connect each storage device when the identification symbol suitability determining means determines that the identification symbol is appropriate. If it is determined as inappropriate, the connection switching means is controlled to disconnect each storage device. For example, when an inappropriate identification symbol is set by the identification symbol setting means, the storage device is looped. This prevents the occurrence of problems such as data corruption, prevents unauthorized operation of the disk array device, and improves the reliability.

  1 is a diagram schematically showing the configuration of a disk array device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the disk array device, and FIG. 3 is a JBOD storage of the disk array device. FIG. 4 is a diagram illustrating the configuration of the first PBC and the second PBC for relaying the JBOD storage unit, and FIG. 5 is a diagram illustrating the configuration of the first SES function unit, the second SES function unit, the first PBC, and the second PBC. Processing procedure diagrams for explaining the operation of the disk array device, and FIGS. 6 to 8 are explanatory diagrams for explaining the operation of the disk array device.

  The disk array device 1 of this example uses a fiber channel FC-AL (Fibre Channel Arbitrated Loop), and as shown in FIGS. 1 and 2, a disk controller 2 and a plurality of magnetic disk devices (hereinafter referred to as HDD (hereinafter referred to as HDD)). And a JBOD storage unit 3 having a plurality of JBOD (Just a Bunch Of Disks) devices, which are called “Hard Dics Drive”), and is configured to allow the addition of JBOD devices in an online state (operating state). . A host computer 4 is connected to the disk array device 1 via a communication path. The JBOD storage unit 3 constitutes a RAID.

In this example, the ports of devices such as HDDs are connected in a loop, and an arbitrated loop in which communication is performed only between a pair of ports is employed, and reliability is ensured. For this reason, each HDD is duplicated by being connected to two independent loops.
For example, there are two fiber channel cables, and a pair of main control units and disk side input / output control units constituting the disk controller 2 and SES function units constituting each JBOD device are provided.

The disk controller 2 includes a first main control unit 6 and a second main control unit 7 having a CPU (central processing unit) and the like, and processes executed by the first main control unit 6 and the second main control unit 7 respectively. A first storage unit 8 and a second storage unit 9 for storing programs and various data, a first disk side input / output control unit 11 and a second disk side input / output control unit 12, and a first host side input / output A control unit 13 and a second host side input / output control unit 14 are provided.
The first main control unit 6 (second main control unit 7) executes various processing programs stored in the first storage unit 8 (second storage unit 9), and the first storage unit 8 (second storage unit 9). The various components and flags secured in (1) are used to control each component and execute disk control processing and the like.

The first storage unit 8 (second storage unit 9) includes a semiconductor memory such as a ROM and a RAM, and various processes such as a disk control processing program executed by the first main control unit 6 (second main control unit 7). It has a program storage area for storing programs and the like, and an information storage area for storing various information such as setting information.
The disk control processing program stored in the program storage area of the first storage unit 8 (second storage unit 9), for example, assigns IDs to HDDs and SES function units constituting each JBOD device when the JBOD device is added. Contains initialization program to perform.

The first disk side input / output control unit 11 (second disk side input / output control unit 12) is controlled by the first main control unit 6 (second main control unit 7), and is controlled by a protocol control unit or S / P (Serial / Parallel) has a conversion unit and an optical module unit.
Similarly, the first host-side input / output control unit 13 (second host-side input / output control unit 14) is controlled by the first main control unit 6 (second main control unit 7), and the protocol control unit and S / S It has a P conversion unit and an optical module unit.

As shown in FIG. 2, the JBOD storage unit 3 is schematically configured by connecting a plurality of JBOD devices 21 ₀ , 21 ₁ ,..., 21 _m (m: natural number).
Here, the disk controller 2, JBOD unit _{21 0,} 21 1, ..., and 21 _m, for example, a cable ₁₆ 0, ₁₆ 1, an optical fiber cable, through a ... 16 _m, are connected in a loop In addition, the cables 17 ₀ , 17 ₁ ,... 17 _m are connected in a loop shape, and the two loops are independent of each other.

As shown in FIG. 1, each JBOD device 21 _i (0 ≦ i ≦ m, i: 0 or a natural number) has a plurality of HDDs (HDD ₀₀ 22 _i0 , HDD ₀₁ 22 _i1 ,..., HDD _0n 22 _in (n : A natural number)) and environmental management and resource management (for example, management of power supply, cooling fan, etc.) in the enclosure, as well as the first enclosure service section (hereinafter referred to as the first SES ( SCSI (Small Computer System Interface) Enclosure Service (function unit) 23 _i and second enclosure service unit (hereinafter referred to as second SES function unit) 24 _i, and a first loop connection switching unit (hereinafter referred to as “second loop connection switching unit”) the 1PBC (Port Bypass Cercuit) _{referred) 25 i0, 25 i1, ...} , 25 in and, second loop connection switching part (hereinafter, referred to as the _{2PBC) 26} i0, _{26 i} , _{26 in} a, the first 1PBC25 _{in + 1,} which is disposed in the 1SES functional unit 23 _i, and the 2PBC26 _{in + 1,} which is disposed in the 2SES functional unit 24i, and the 1PBC27 _i and the 2PBC28 _i for relay, JBOD unit 21 _i ID setting unit 29 _i composed of a rotary switch for setting the ID, and an error display unit 31 _i composed of an LED indicator for displaying an ID setting error, for example.

Each HDD has two input / output units, and one port and the first SES function unit 23 _i are connected to form one loop, and the other port and the second SES function unit 24. _i is connected to form the other loop.
Here, the HDD is connected to one loop via the first PBCs 25 _i0 , 25 _i1 ,..., 25 _in , and one of the connection state and the bypass state is selected by the control of the first SES function unit 23 _i. .

The HDD is connected to the other loop via the second PBCs 26 _i0 , 26 _i1 , and 26 _in , and one of the connection state and the bypass state is selected by the second SES function unit 24 _i .
Further, JBOD unit 21 _i via the first 1PBC27 _i, is connected to the next stage JBOD device _{21 i + 1,} as well as constituting one of the loop, through a second 2PBC28 _i, to the next JBOD device _{21 i + 1} Connected to form the other loop. The first PBC 27 _i (second PBC 28 _i ) performs a switching operation so as to be connected to the next-stage JBOD device 21 _{i + 1} when input is received from the next-stage JBOD device 21 _{i + 1} .

As shown in FIG. 3, the first SES function unit 23 _i (second SES function unit 24 _i ) is also connected to one loop via the _first PBC 25 _{in + 1} (second PBC 26 _{in + 1} ). Select one of them.
For example, when adding a JBOD unit _{21 i + 1,} when a new connection to another JBOD unit _{21 i + 1} to JBOD unit 21 _i of the last stage, the 1PBC27 _i is connected to JBOD unit _{21 i + 1} side to be added The second PBC 28 _i is switched so as to be connected to the side of the JBOD device 21 _{i + 1} to be added, and a loop is formed including the JBOD device 21 _{i + 1} in the next stage.

The first SES function unit 23 _i (second SES function unit 24 _i ) includes a main control unit 33 (36), a storage unit 34 (37), and an input / output control unit 35 (38).
The main control unit 33 (36) executes various processing programs stored in the storage unit 34, and controls each component using various registers and flags secured in the storage unit 34 (37).
The main control unit 33 (36) has a function of obtaining loop address MAP information of the loop on the FC-AL via the input / output control unit 35 (38) and determining whether or not the acquired loop address is normal. is doing.
The storage unit 34 (37) includes a semiconductor memory such as a ROM and a RAM. In addition to an environment management program and a resource management program executed by the main control unit 33 (36), various processing programs such as a disk connection control processing program, etc. Is stored, and an information storage area in which various information such as setting information is stored.

The program storage area disk connection control process program stored in the memory unit 34 (37), for example, the ID to be set by the ID setting unit 29 _i, the ID setting unit 29 _i when JBOD device 21 _i Expansion An ID suitability determination processing program for judging the suitability of the set ID by comparing the ID assigned based on the made setting and acquired according to the protocol of the FC-AL specification, and the set ID is judged to be inappropriate If the error display program for causing the error display unit 31 _i to display an error and the set ID are determined to be inappropriate, the first PBC 25 _i0 , 25 _i1 ,..., 25 _in (second PBC 26 _i0 , 26 _i1 , 26 _in ) to control the HDD to be in a bypass state, and the set ID is determined to be appropriate. In this case, a connection control program for controlling the first PBC 25 _i0 , 25 _i1 ,..., 25 _in (second PBC 26 _i0 , 26 _i1 , 26 _in ) to bring the HDD into a connection state is included.
The input / output control unit 35 (38) includes a protocol control unit, an S / P conversion unit, and an optical module unit, and has a function of controlling a loop initialization sequence.

Next, the operation of the disk array device 1 of this example will be described with reference to FIGS.
Here, as shown in FIG. 6, the next stage of the JBOD device 21 _0, describes the case of adding a JBOD device 21 _1.
First, the operator uses the ID setting unit 29 ₁ to set the ID of the JBOD device 21 _{1 to be} added.
JBOD unit ₂₁₁ may be disposed within the housing, when the power is turned on (step SA11 (Fig. 5)), the main control unit 33 (36), for example, the JBOD device set by the ID setting unit 29 ₁ 21 ₁ device ID is recognized, and the device ID, the ID corresponding to each HDD, and the ID corresponding to the first SES function unit 23 ₁ (second SES function unit 24 ₁ ) are stored in the storage unit 34 (37). Let In this state, power is not supplied to each HDD.

The main control unit 33 (36) simultaneously controls the first PBCs 25 ₁₀ , 25 ₁₁ ,..., 25 _1n (second PBCs 26 ₁₀ , 26 ₁₁ ,..., 26 _1n ) to put the HDD in a bypass state, and sets the first PBC 25 _{1n + 1} ((first) 2PBC26 _{1n + 1} ) to control itself (step SA12), and only the first SES function unit 23 ₁ (second SES function unit 24 ₁ ) participates in the fiber channel loop.
Then, to supply power to the respective HDD (step SA13), Boost by connecting a JBOD unit ₂₁₁ (step SA14).
Incidentally, by the connection of the JBOD device 21 _1, the 1PBC27 _i (the 2PBC28 _i) from the state shown in FIG. 8 (a), the loop including the next stage JBOD device 21 ₁ shown in (b) is formed Switch to the state to be performed.

The first main control section 6 of the disk controller 2 (second main controller 7), by JBOD device 21 ₁ is added, Performs initialization, this time, the 1SES function unit 23 ₁ (first 2SES function The unit 24 ₁ ) is a target of initialization processing (step SA15). That is, the first SES function unit 23 ₁ (second SES function unit 24 ₁ ) participates in FC-AL loop initialization (loop initilization).
When the first main control unit 6 (second main control unit 7) performs initialization processing and assigns IDs, the first SES function unit 23 ₁ ( _first) is set based on the setting by the ID setting unit 291. ID corresponding to the 2SES function unit 24 ₁ ) is assigned.

Here, when the corresponding loop address (ID) is acquired by another device, it is assigned other than hardware SEL_ID (Selection ID), and a soft address that cannot be originally assigned is assigned.
The main control unit 33 (36), for example, with respect to its own ID corresponding to the _first SES function unit 23 ₁ (second SES function unit 24 ₁ ), and the ID setting unit 29 ₁ is compared with the ID that should be assigned based on the setting by ₁ , and the suitability of the ID is determined (step SA16).

In step SA17, if both IDs match, the main control unit 33 (36) determines that the set ID is appropriate, and receives a predetermined command from the disk controller 2 (step SA18), the first PBC 25 ₁₀ , 25 ₁₁ ,..., 25 _1n (second PBC 26 ₁₀ , 26 ₁₁ , 26 _1n ) are controlled to bring the HDD into a connected state as shown in FIG. 7B (step SA19).

Thus, each HDD participates in the loop (step SA20). As a result, the first main controller 6 (second main controller 7) of the disk controller 2 recognizes each HDD (step SA21).
On the other hand, when the two IDs do not match (for example, when a soft address is issued), the main control unit 33 (36) determines that the set ID is inappropriate, the first PBC 25 ₁₀ , 25 ₁₁ ,..., 25 _1n (second PBC 26 ₁₀ , 26 ₁₁ , 26 _1n ) are controlled to place the HDD in a bypass state as shown in FIG. 7A (step SA 22). The main control unit 33 (36), at the same time, to perform error display on the error display section 31 ₁ (step SA 23).

Thus, according to the embodiment, for example, if improper ID by the ID setting unit 29 ₁ is set, at the time of connecting the JBOD device can detect the erroneous setting of the ID .
In addition, when an incorrect ID setting is detected, the HDD is not connected to the loop, so that it is possible to prevent problems such as data corruption. In other words, it does not adversely affect the disk array device in operation and cause unauthorized operation. Therefore, reliability can be improved.
In addition, since it is not necessary to add special hardware for detection of erroneous ID settings or determination of whether or not IDs are allowed, functions can be enhanced while suppressing costs.

In addition, when an erroneous setting of ID is detected, an error display is displayed on the error display unit, so that the operator can recognize the erroneous setting and accurately reset it.
In this way, when adding a JBOD device in an online state, it is possible to eliminate the adverse effects of erroneous settings by the operator, so that the amount of data to be processed is increased in a computer system that is operated for 24 hours. It is suitable to be applied when the storage capacity is increased correspondingly.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention.
For example, in the above-described embodiments, the case where a magnetic disk is used as the storage medium constituting the JBOD storage unit has been described. However, a CD-ROM, DVD-ROM, MO, CD-R, or the like may be used.
Further, the disk controller may be configured with a display unit and an operation unit.
In addition, for example, the first storage unit and the second storage unit may include an FD (flexible disk), an HD (hard disk), an FDD to which a CD-ROM is mounted, an HDD, a CD-ROM driver, and the like. good.

Further, the disk array device does not necessarily have to be duplicated. Also, a triple system of three or more layers may be used.
Further, the present invention can be applied not only when adding JBOD devices but also when replacing. The present invention can also be applied to the case where the ID is simply reset by the ID setting unit. Each JBOD device may have a different number of HDDs.
Further, the connection between the disk array device of this example and the host computer does not necessarily depend on the fiber channel, and SCSI may be used.
Further, the error notification is not limited to the indicator lamp, and a message may be displayed, or may be notified by voice, for example.
The first PBC for relay (second PBC) may be switched by being controlled by the first SES function unit (second SES function unit).

Of the RAID technologies used in the disk array device, the RAID level employed is not particularly limited. For example, in a configuration called RAID1, two sets of all data are prepared and stored in different disk devices. In RAID 2, striping is performed bit by bit between disk devices, and a hamming code is used to improve reliability and a redundant disk for hamming code is provided.
In RAID3, a disk device for parity is provided, and data is cyclically arranged on a plurality of disk devices in units of bits or bytes. In RAID4, a data arrangement unit is a larger block arrangement unit.
In RAID 5, redundant data is not stored in a dedicated parity disk device, but is cyclically arranged in each disk device, and the write destination of redundant data is distributed.
Further, in RAID 6, the error correction function is enhanced by using two types of parity that are independent from each other as redundant data and using, for example, an RS (Reed-Solomon) code.
For example, part or all of the RAID control process may be performed using dedicated hardware, and a part of the RAID control process may be executed by executing a corresponding program.

  The present invention can be applied when a semiconductor memory or a memory card is used as a storage device in addition to a disk device.

1 is a diagram schematically showing a configuration of a disk array device according to an embodiment of the present invention. FIG. It is a block diagram which shows the structure of the disk array apparatus. It is a figure which shows the structure of the 1st SES function part, 2nd SES function part, 1st PBC, and 2nd PBC of the JBOD memory | storage part of the same disk array apparatus. It is a figure which shows the structure of 1st PBC and 2nd PBC for relay of the same JBOD storage part. FIG. 6 is a processing procedure diagram for explaining the operation of the same disk array device. FIG. 10 is an explanatory diagram for explaining the operation of the same disk array device. FIG. 10 is an explanatory diagram for explaining the operation of the same disk array device. FIG. 10 is an explanatory diagram for explaining the operation of the same disk array device.

Explanation of symbols

1 Disk array device (information processing device)
2 Disk controller (storage controller)
3 JBOD storage unit 4 Host computer 6 First main control unit (identification symbol assigning means)
7 Second main control unit (identification symbol assigning means)
8 First storage unit 9 Second storage unit 21 ₀ , 21 ₁ ,... JBOD device (concatenated storage device)
22 _i0 , 22 _i1 ,... HDD (storage device)
23 ₀ , 23 ₁ ,... First SES function unit (switching control means, identification symbol suitability judging means)
24 ₀ , 24 ₁ ,... Second SES function unit (switching control means, identification symbol suitability judging means)
25 ₀₀ , 25 ₀₁ ,... First PBC (connection switching means, control connection switching means)
26 ₀₀ , 26 ₀₁ ,... 2nd PBC (connection switching means, control connection switching means)
29 ₀ , 29 ₁ ,... ID setting section (identification symbol setting means)
31 ₀ , 31 ₁ ,... Error display section (error notification means)

Claims (24)

An information processing apparatus comprising: at least one linked storage device having a plurality of storage devices connected in a loop; and a storage control device that controls the linked storage device,
The concatenated storage device includes at least an identification symbol setting means for setting an identification symbol of the concatenated storage device, a connection switching means for performing setting / release for separating and bypassing the storage device, and the connection switching means. Switching control means for controlling, and identification symbol suitability determination means for judging the suitability of the identification symbol set by the identification symbol setting means,
The switching control unit controls the connection switching unit when the identification symbol suitability determining unit determines that the identification symbol is appropriate, and connects the storage devices by releasing the bypass. When the identification symbol suitability determining unit determines that the identification symbol is inappropriate, the connection switching unit is controlled to perform bypass setting of each storage device and disconnect the storage device. Information processing apparatus. The storage control device includes an identification symbol assigning unit that performs an initialization process and assigns an identification symbol based on a setting by the identification symbol setting unit when the linked storage device is connected,
The identification symbol suitability determination unit compares the identification symbol set by the identification symbol setting unit with the identification symbol assigned by the identification symbol assignment unit, thereby determining the identification symbol set by the identification symbol setting unit. The information processing apparatus according to claim 1, wherein suitability is determined. The storage devices and the switching control means of the coupled storage device and the storage control device are connected to form a closed circuit,
The linked storage device has control connection switching means for performing setting / release for separating and bypassing the switching control means;
The switching control means controls the control connection switching means when the connection storage device is powered on, and causes the connection of the switching control means to be released and connected, and controls the connection switching means. The information processing apparatus according to claim 1, wherein power is supplied to each of the storage devices after the bypass setting of each of the storage devices is performed and disconnected.   The linked storage device provides an error notification for notifying that the identification symbol is inappropriate when the identification symbol suitability determination unit determines that the identification symbol set by the identification symbol setting unit is inappropriate. The information processing apparatus according to claim 1, 2 or 3, further comprising means.   5. The storage device according to claim 1, wherein the storage devices and the switching control unit of the linked storage device are connected to the storage control device using a fiber channel arbitrated loop. The information processing apparatus described in 1.   6. The connection storage device according to claim 1, wherein the connection storage device includes a plurality of the connection storage devices and sets the identification symbol by the identification symbol setting unit. The information processing apparatus described. A linked storage device comprising a plurality of storage devices connected in a loop, controlled by a storage control device, and constituting an information processing device,
An identification symbol setting means for setting at least an identification symbol of the linked storage device, a connection switching means for performing setting / release for separating and bypassing the storage device, and a switching control means for controlling the connection switching means And an identification symbol suitability determination means for judging the suitability of the identification symbol set by the identification symbol setting means,
The switching control unit controls the connection switching unit when the identification symbol suitability determining unit determines that the identification symbol is appropriate, and connects the storage devices by releasing the bypass. When the identification symbol suitability determining unit determines that the identification symbol is inappropriate, the connection switching unit is controlled to perform bypass setting of each storage device and disconnect the storage device. A connected storage device. The storage control device includes an identification symbol assigning unit that performs an initialization process and assigns an identification symbol based on a setting by the identification symbol setting unit when the linked storage device is connected,
The identification symbol suitability determination unit compares the identification symbol set by the identification symbol setting unit with the identification symbol assigned by the identification symbol assignment unit, thereby determining the identification symbol set by the identification symbol setting unit. The connected storage device according to claim 7, wherein suitability is determined. Each storage device and the switching control means and the storage control device are connected to form a closed circuit,
Control connection switching means for performing setting / cancellation for separating and bypassing the switching control means;
The switching control means controls the control connection switching means when the connected storage device is powered on, and causes the switching control means to release the bypass so as to be connected, and also controls the connection switching means. The connected storage device according to claim 7, wherein power is supplied to each storage device after the bypass setting of each storage device is performed and disconnected.   When the identification symbol suitability determination unit determines that the identification symbol set by the identification symbol setting unit is inappropriate, the error notification unit notifies the fact that the identification symbol is inappropriate. The connected storage device according to claim 7, 8 or 9.   The connected storage according to any one of claims 7 to 10, wherein each of the storage devices, the switching control means, and the storage control device are connected using a fiber channel arbitrated loop. apparatus.   12. The connected storage device connected to the other connected storage device and setting an identification symbol by the identification symbol setting means is a connected storage device to be added. The linked storage device according to the description. A storage control device that controls at least one linked storage device having a plurality of storage devices connected in a loop and constitutes an information processing device,
The concatenated storage device includes at least an identification symbol setting means for setting an identification symbol of the concatenated storage device, a connection switching means for performing setting / release for separating and bypassing the storage device, and the connection switching means. Switching control means for controlling, and identification symbol suitability determination means for judging the suitability of the identification symbol set by the identification symbol setting means,
The switching control unit controls the connection switching unit when the identification symbol suitability determining unit determines that the identification symbol is appropriate, and connects the storage devices by releasing the bypass. If the identification symbol suitability determining unit determines that the identification symbol is inappropriate, the connection switching unit is controlled to cause the storage device to perform bypass setting,
The storage control device includes an identification symbol assigning unit that performs an initialization process and assigns an identification symbol based on a setting by the identification symbol setting unit when the linked storage device is connected,
The identification symbol suitability determination unit compares the identification symbol set by the identification symbol setting unit with the identification symbol assigned by the identification symbol assignment unit, thereby determining the identification symbol set by the identification symbol setting unit. A storage control device for determining suitability. Each storage device and the switching control means of the coupled storage device and the storage control device are connected to form a closed circuit,
The linked storage device has control connection switching means for performing setting / release for separating and bypassing the switching control means;
The switching control means controls the control connection switching means when the connection storage device is powered on, and causes the connection of the switching control means to be released and connected, and controls the connection switching means. The storage control device according to claim 13, wherein power is supplied to each of the storage devices after the bypass setting of each of the storage devices is performed and disconnected.   The linked storage device provides an error notification for notifying that the identification symbol is inappropriate when the identification symbol suitability determination unit determines that the identification symbol set by the identification symbol setting unit is inappropriate. 15. The storage control device according to claim 13, further comprising means.   16. The storage device and the switching control unit of the linked storage device and the storage control device are connected using a fiber channel arbitrated loop. Storage controller.   The connected storage device that controls a plurality of the connected storage devices and sets the identification symbol by the identification symbol setting means is an additional connected storage device. The storage control device according to 1. A method for controlling connection switching of a plurality of storage devices constituting an information processing device and connected in a loop,
An identification symbol setting step of setting an identification symbol of the linked storage device comprising at least the plurality of storage devices by an identification symbol setting means;
A connection switching step in which connection switching means performs setting / cancellation for separating and bypassing the storage device;
A switching control step for controlling the connection switching means by a switching control means;
An identification symbol suitability determination step for judging the suitability of the identification symbol set in the identification symbol setting step,
In the switching control step, when it is determined in the identification symbol suitability determination step that the identification symbol is appropriate, the connection switching unit is controlled to release the bypass of each storage device. When the identification symbol suitability determination step determines that the identification symbol is unsuitable, the connection switching means is controlled to perform bypass setting for each storage device and disconnect the storage device. A connection switching control method. A storage control step of controlling the linked storage device by a storage control device, wherein the storage control step performs initialization processing when the linked storage device is connected, and sets the identification symbol in the setting step An identification symbol assignment step for performing identification symbol assignment based on
In the identification symbol suitability determination step, the identification symbol set in the identification symbol setting step is compared with the identification symbol set in the identification symbol assignment step, by comparing the identification symbol set in the identification symbol setting step. The connection switching control method according to claim 18, wherein the suitability is determined. Each storage device and the switching control means and the storage control device are connected to form a closed circuit,
A control connection switching step for performing setting / cancellation for separating and bypassing the switching control means by the control connection switching means,
When the connected storage device is powered on, in the control connection switching step, the control connection switching means is controlled so that the bypass of the switching control means is released and connected, and in the switching control step, 20. The connection switching according to claim 18 or 19, wherein the connection switching means is controlled so that power is supplied to each storage device after the bypass setting of each storage device is performed and disconnected. Control method.   An error notification step of notifying the error notification means that the identification symbol is inappropriate when it is determined in the identification symbol suitability determination step that the identification symbol set in the identification symbol setting step is inappropriate. The connection switching control method according to claim 18, 19 or 20.   The connection switching according to any one of claims 18 to 21, wherein each of the storage devices, the switching control means, and the storage control device are connected using a fiber channel arbitrated loop. Control method.   23. The connected storage device is connected to another connected storage device, and the connected storage device that sets an identification symbol in the identification symbol setting step is an additional connected storage device. The connection switching control method according to any one of the above. A connection switching control program for causing a computer to execute the connection switching control method according to any one of claims 18 to 23.

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