hitachi thunder 9200 dual active id succession (5800/9200) user’s guide

Hitachi Freedom StorageThunder 9200

Dual Active ID SuccessionTM(5800/9200)Users Guide

Hitachi Thunder 9200 Dual Active ID Succession Users Guide iii

2001 Hitachi Data Systems Corporation, ALL RIGHTS RESERVED

Notice: No part of this publication may be reproduced or transmitted in any form or by anymeans, electronic or mechanical, including photocopying and recording, or stored in adatabase or retrieval system for any purpose without the express written permission of HitachiData Systems Corporation.

Hitachi Data Systems reserves the right to make changes to this document at any time withoutnotice and assumes no responsibility for its use. Hitachi Data Systems products and servicescan only be ordered under the terms and conditions of Hitachi Data Systems applicableagreements. All of the features described in this document may not be currently available.Refer to the most recent product announcement or contact your local Hitachi Data Systemssales office for information on feature and product availability.

This document contains the most current information available at the time of publication.When new and/or revised information becomes available, this entire document will be updatedand distributed to all registered users.

Trademarks

Hitachi Data Systems is a registered trademark and service mark of Hitachi, Ltd., and theHitachi Data Systems design mark is a trademark and service mark of Hitachi, Ltd.

IBM is a registered trademark of International Business Machines Corporation.

RS/6000 is a registered trademark of International Business Machines Corporation.

AIX is a registered trademark of International Business Machines Corporation.

NCR is a registered trademark of NCR Corporation.

VxVM (VERITAS Volume Manager) is a registered trademark of VERITAS SoftwareCorporation.

All other brand or product names are or may be trademarks or service marks of and are used toidentify products or services of their respective owners.

and trademark designations are not used in this manual.

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Export of technical data contained in this document may require an export license from theUnited States government and/or the government of Japan. Please contact the Hitachi DataSystems Legal Department for any export compliance questions.

iv

Document Revision Level

Revision Date Description

MK-90DF525-P April 2001 Preliminary Release.

MK-90DF525-0 May 2001 Initial Release. Supersedes and replaces MK-90DF525-P.

Source Document Revision Level

The following source document was used to produce this 5800/9200 user guide:

DF-F500-WD ID Take-over control function Users Guide, Second Edition.

Changes in this Revision

! Removed Preliminary from the headers.

! Changed the title page to: Hitachi Freedom Storage Thunder 9200 Dual Active IDSuccession (5800/9200) Users Guide.

Hitachi Thunder 9200 Dual Active ID Succession Users Guide v

Preface

Dual Active ID Succession is installed on your Thunder 9200 disk array unit. Before usingDual Active ID Succession, read the operating procedures and notices included in this guide.Carefully follow the safety precautions and instructions.

The Hitachi Freedom Storage Thunder 9200 Dual Active ID Succession Users Guideassumes that:

! The user has a background in data processing and understands direct-access storage devicesubsystems and their basic functions.

! The user is familiar with the Hitachi Freedom Storage Thunder 9200 array subsystem.

For further information on Hitachi Data Systems products and services, please contact yourHitachi Data Systems account team, or visit the Hitachi Data Systems worldwide web site athttp://www.hds.com. For specific information on the supported host systems and platforms forthe 9200, please refer to the user documentation for the product, or contact the vendorscustomer support service.

Note: The term 9200 refers to the Hitachi Thunder 9200 subsystem, unless otherwisenoted. Please refer to the Hitachi Thunder 9200 User and Reference Guide (MK-90DF504)for further information on the 9200 disk array subsystem.

Note: The use of Dual Active ID Succession and all other Hitachi Data Systems products isgoverned by the terms of your license agreement(s) with Hitachi Data Systems.

Safety Precautions

Note the following when using Dual Active ID Succession:

! Only administrators, system engineers, and field engineers who are familiar with HitachiData Systems disk array units are allowed to run the Dual Active ID Succession function.

! Make certain you read and fully understand this guide before you operate the Dual ActiveID Succession function.

! Carefully follow instructions included with the CAUTION label.

Failure to follow these instructions can result in serious system damage and/or the loss ofsystem data.

CAUTION

vi Preface

Hitachi Thunder 9200 Dual Active ID Succession Users Guide vii

Contents

Chapter 1 Introducing Dual Active ID Succession ..................................................... 1

1.1 Specifications................................................................................................................. 41.2 Restrictions .................................................................................................................... 6

1.2.1 Restrictions on configuration............................................................................. 61.2.2 Restrictions on configuration setting................................................................. 61.2.3 Restrictions on the host...................................................................................... 71.2.4 Restrictions on operation ................................................................................... 7

Chapter 2 Installing and Uninstalling Dual Active ID Succession .................................. 9

2.1 Installation...................................................................................................................... 92.2 Uninstallation............................................................................................................... 142.3 Setting to Enable or Disable ........................................................................................ 18

Chapter 3 Setting and Canceling the Dual Active ID Succession Function ......................21

List of FiguresFigure 1.1 Dual Active ID Succession and Transition of System Operation Failure or

Recovery (Fibre Channel)...................................................................................... 2Figure 1.2 Dual Active ID Succession and Transition of System Operation Failure or

Recovery (Parallel SCSI)....................................................................................... 3Figure 1.1 Combined System Configuration of Host Cluster Configuration and

Dual Active ID Succession (two HUB)................................................................. 5Figure 1.2 Combined System Configuration of Host Cluster Configuration and

Dual Active ID Succession (one HUB) ................................................................. 5Figure 1.3 Dual Active ID Succession Prohibited System with Fibre (two 9200

connected per loop) ............................................................................................... 5Figure 1.4 Dual Active ID Succession (Parallel SCSI model)................................................ 5

List of TablesTable 1.1 Support for the Dual Active ID Succession Function ........................................... 4

viii Contents

Hitachi Thunder 9200 Dual Active ID Succession Users Guide 1

Chapter 1

Introducing Dual Active ID Succession

The Dual Active ID Succession feature provides the following functions:

! When one controller in a dual controller configuration is blocked due to a failure, theother controller takes over the Port-ID of the blocked controller. It automatically switchesthe path to continue processing.

! When an array unit is operated in hot-standby mode and a controller blockade occurs inone controller due to a failure, the other controller can continue processing with the samelevel of performance as that prior to the failure.

! When an array unit is operated in dual-active mode (with two ports per controllerattached) and a controller blockade occurs in one controller due to a failure, the othercontroller continues processing the same as it does in hot-standby mode.When a controller blockade occurs in dual-active mode, only one of two controllersperforms the processing; therefore performance is similar to that of an array unit with asingle controller configuration. However, if an array unit is operated in dual-active modeand the array unit is restored to the original path condition by recovering a failedcontroller while the array unit is in operation, performance of the array unit at run-timecan be restored to the same performance level as that prior to the failure.

Note: The Dual Active ID Succession function is effective only when a controller failureoccurs. It is not effective in the event of host-side HBA (Host Bus Adapter) and cable failures(including HUB failures).

This section includes diagrams of Dual Active ID Succession functioning in both FibreChannel and Parallel SCSI modes.

2 Chapter 1 Introducing Dual Active ID Succession

Fibre Channel model

The corresponding ports of both controllers are connected via a HUB. In case of a controllerfailure, the failed controller is disconnected and the active controller continues the I/Oprocessing.

CTL0failure

CTL1A B

CTL0A B

HUB HUB

Host0 1

" CTL0failure

CTL1replacing while online

HUB

Host

CTL0BA

CTL1BA

1

HUB

# Normal

0

CTL0BA

CTL1BA

HUBHUB

Host10

$ CTL1failure

CTL1failure

Host

CTL0BA

CTL1BA

1

HUBHUB

0%

Normal


Figure 1.1 Dual Active ID Succession and Transition of System Operation Failure or Recovery (FibreChannel)

Note: If an array unit is operated in hot-standby mode, LUs are accessed from only one of thetwo controllers at normal operation time. Additionally, though a blocked controller is replacedwhile the array unit is in operation, processing is continued with the same path as beforereplacement.


Parallel SCSI model

The corresponding ports of both controllers are daisy chained. When a controller failureoccurs, the failed controller does not respond to the selection from the host; the activecontroller continues the I/O processing.

CTL0failure

CTL1A

CTL0A

Host0

" CTL0failure


Host

CTL0A

CTL1A

# Normal

0

CTL0A

CTL1A

Host0

$ CTL1failure

CTL1failure

Host

CTL0A

CTL1A

0%

Normal


Figure 1.2 Dual Active ID Succession and Transition of System Operation Failure or Recovery(Parallel SCSI)


1.1

Specifications

The specifications of the Dual Active ID Succession function are as follows:

1.

A dual controller configuration is required.

2.

If an array unit is operated in dual-active mode, two ports are required for each controller.For the Parallel SCSI model, hot-standby mode is necessary because this model has onlyone port for each controller.

3.

The supported Dual Active ID Succession port models are listed in the following table.

Table 1.1 Support for the Dual Active ID Succession Function

Device name Port SpecificationsSCSI Fibre

9200 Supported Supported

4.

Cable connections and Port-ID/Target ID settings are as follows:For the Fibre Channel model, connect the same ports of both controllers to the same loop(HUB) and assign the same Port-ID.Figure 1.3 and Figure 1.4, show configurations of cable connections for the Fibre Channelmodel.Figure 1.5 shows a configuration of the Dual Active ID Succession function prohibitedsystem for the Fibre Channel model.Figure 1.6 shows a configuration of cable connections for the Parallel SCSI model.

5.

The Dual Active ID Succession function is a licensed option (DF-F500-WD). To installthis function, an option FD provided with the optional feature or the key code is required.


CTL0 B A

CTL1 B A

HUB HUB

Host 0

Host 0

CTL0 B A

CTL1 B A

HUB

Host 0

Host 0

Figure 1.3 Combined System Configuration of HostCluster Configuration and Dual Active IDSuccession (two HUB)

Figure 1.4 Combined System Configuration of HostCluster Configuration and Dual Active IDSuccession (one HUB)

CTL0 B A

CTL1 B A

HUB HUB

Host 1 0

CTL0 B A

CTL1 B A

Host

CTL0A

CTL1A

0

Figure 1.5 Dual Active ID Succession ProhibitedSystem with Fibre (two 9200 connectedper loop)

Figure 1.6 Dual Active ID Succession (Parallel SCSImodel)


1.2

Restrictions

This section includes restrictions for the Dual Active ID Succession function.

1.2.1

Restrictions on configuration

! A two-ports-per-controller configuration is prerequisite for dual-active mode.(This function can be used only with the hot-standby mode in case of the Parallel SCSImodel or RKL model.)

! In case of Fibre Channel model, connection through a Fabric Switch is not available.Connection between a DF500 unit and the host is available only through a HUB to use theDF500.

1.2.2

Restrictions on configuration setting

! In case of Fibre Channel model, set the topology of all ports to LOOP.

! The Port-IDs/Target IDs of ports with the same port number between the two controllersare set to the same ID (an Port-ID/Target ID of controller 0 is copied to that of controller1).

! The same Port-ID/Target ID should be corresponding to the same LUN.In addition, map an LU to a port of a controller using the LU mapping so that the mappedLU cannot be recognized by other ports of the same controller.

! The ownership of LUN should be on the active-port control side of the ports on which theLUN is mapped.

! The take-over mode cannot co-exist together with the following types of the hostconnection mode specified by the system parameter and each mode specified by thesystem start attribution.

Host connection mode System start attribution

TRESPASS DATA SHARE MODE=ON

WOLFPACK

VxVM DMP

IBM 7135 I/O Path Switch

NCR I/O Path Switch


1.2.3

Restrictions on the host

! To change the controller accepting a command when recovering a controller, a commandissued to the other controller is internally reset. Also, a failure may be recorded on a hostlog because a LIP (in case of Fibre Channel model) may be issued at the controllerreplacement.

! When switching on the host (server), switch on DF500 first and then switch on the host(server) after confirming that DF500 becomes READY. If this order is reversed, DF500may not be recognized by the host.

! After switching the path, a Unit Attention factor of PS/ON reset is reported to a commandfrom the host.

1.2.4

Restrictions on operation

! When installing (unlocking) and uninstalling (locking) the Dual Active ID Successionfunction, and making and changing the setting of enable and disable, be sure to restart adisk array unit (by selecting restart with the Disk Array Management Program, or turningoff (orderly shutdown) and then on a disk array unit) before using.


Chapter 2

Installing and Uninstalling Dual ActiveID Succession

This chapter is divided into the following sections:

! Installation

! Uninstallation

! Setting to Enable or Disable

2.1

Installation

The ID take-over control function which is a kind of option is usually unselectable (closed).To make the ID take-over control function available, you must install the option of the IDTake-over control function (DF-F500-WD) and make its functions selectable (open). To installthis function, an option FD provided with the optional feature or the key code is required.

Follow the instructions below to install the ID Take-over control function (DF-F500-WD).The ID take-over control function is installed and uninstalled using the Disk ArrayManagement Program. For operating procedures of the Disk Array Management Program,refer to the Disk Array Management Program (for GUI) Users Guide.Note: Before installing and uninstalling, make sure that an array unit which to operate isnormal. If a failure such as a controller blockade has occurred, installing and uninstallingoperations cannot be performed.

The following describes installation procedures performed by using the Disk ArrayManagement Program via GUI.

1.

Starts the Disk Array Management Program and switches the mode of operating toManagement Mode. Registers an array unit in which to install the ID take-over controlfunction and connects to the registered array unit. A unit window for the connected arrayunit will be displayed.

2.

Click the Parameters button, then the Option tab.

10 Chapter 2 Installing and Uninstalling Dual Active ID Succession

3.

Unlocks the optional feature using the key FD or the key code.

! Unlocking with the key FDa)

Inserts the key FD into the FDD of a machine in which the Disk Array ManagementProgram has been installed.

b)

Click the Directory radio button to set in the text box a path to the FD.c)

Click the Open button.d)

A screen for confirming that you want to unlock the ID take-over control function willbe displayed, so click the OK button.

e)

A message indicating that the priced optional feature has been unlocked will bedisplayed. A message confirming your request for restarting will be displayed, so clickthe OK button when restarting.


Note: To set effective the unlocking of the optional feature that you have operated, restart thearray unit. The feature is not yet unlocked until restarting. When restarting is initiated, thearray unit is not ready to accept an access from the host for duration from initiation until therestarting terminates. Therefore, after making sure that the host has stopped accessing, initiaterestarting.

! Unlocking with the key code

a)

Click the Key Code radio button to set in the text box a key code.

b)

Click the Open button.

c)

A screen for confirming that you want to unlock the ID take-over control function will bedisplayed, so click the OK button.


d)

A message indicating that the priced optional feature has been unlocked will bedisplayed. A message confirming your request for restarting will be displayed, so clickthe OK button when restarting.

Note: To set effective the unlocking of the optional feature that you have operated, restart thearray unit. The feature is not yet unlocked until restarting. When restarting is initiated, thearray unit is not ready to accept an access from the host for duration from initiation until therestarting terminates. Therefore, after making sure that the host has stopped accessing, initiaterestarting.

4.

When not restarting an array unit, a screen will be displayed with the set-up pricedoptional feature being updated.

When instructing to restart an array unit, the time the restarting has begun is displayed.The restarting takes about two to six minutes.


Note: It may take time for an array unit to respond, depending on the condition of the arrayunit. If it does not still respond after 10 minutes or more passes, check the condition of thearray unit.

A message indicating that the restarting has terminated is displayed, so click the OK button.When clicking the OK button, the unit window is closed. To perform other operations, selectagain on the main window an array unit which to operate, and open the unit window.


2.2

Uninstallation

Follow the instructions below to uninstall the ID take-over control function. When the ID take-over control function is uninstalled, the ID take-over control function is not available (locked)until it is opened by the Option floppy disk or the key code. To uninstall the IDtake-over control function, the key FD provided with the ID take-over control function featureor the key code described in the key FD is required.

Follow the instructions below to uninstall the ID Take-over control function (DF-F500-WD).1.

Starts the Disk Array Management Program and switches the mode of operating toManagement Mode. Registers an array unit in which to uninstall the ID take-over controlfunction and connects to the registered array unit. A unit window for the connected arrayunit will be displayed.

2.

Click the Parameters button, then the Option tab.

3.

Locks the optional feature using the key FD or the key code.

! Locking with the key FD

a)

Inserts the key FD into the FDD of a machine in which the Disk Array ManagementProgram has been installed.

b)

Click the Directory radio button to set in the text box a path to the FD.c)

Click the Close button.


d)

A screen for confirming that you want to lock the ID take-over control function willbe displayed, so click the OK button.

e)

A message indicating that the priced optional feature has been locked will bedisplayed. A message confirming your request for restarting will be displayed, so clickthe OK button when restarting.

Note: To set effective the locking of the optional feature that you have operated, restart thearray unit. The feature is not yet locked until restarting. When restarting is initiated, thearray unit is not ready to accept an access from the host for duration from initiation untilthe restarting terminates. Therefore, after making sure that the host has stopped accessing,initiate restarting.

! Locking with the key code

a)

Click the Key Code radio button to set in the text box a key code.b)

Click the Close button.


c)

A screen for confirming that you want to lock the ID take-over control function willbe displayed, so click the OK button.

d)

A message indicating that the priced optional feature has been locked will bedisplayed. A message confirming your request for restarting will be displayed, so clickthe OK button when restarting.

Note: To set effective the locking of the optional feature that you have operated, restartthe array unit. The feature is not yet locked until restarting. When restarting is initiated,the array unit is not ready to accept an access from the host for duration from initiationuntil the restarting terminates. Therefore, after making sure that the host has stoppedaccessing, initiate restarting.


4.



Note: It may take time for an array unit to respond, depending on the condition of thearray unit. If it does not still respond after 10 minutes or more passes, check the conditionof the array unit.A message indicating that the restarting has terminated is displayed, so click the OKbutton. When clicking the OK button, the unit window is closed. To perform otheroperations, select again on the main window an array unit which to operate, and open theunit window.


2.3

Setting to Enable or Disable

For the ID take-over control function feature, the ID take-over control function can be set toDisable or Enable under the condition in which the feature has been installed.

The following describes a procedure for setting the function to Disable or Enable while the IDtake-over control function feature stays in an unlocked state.

The following describes setting procedures performed by using the Disk Array ManagementProgram via GUI.

1.

Starts the Disk Array Management Program and switches the mode of operating toManagement Mode. Registers an array unit in which to set the ID take-over controlfunction and connects to the registered array unit. A unit window for the connected arrayunit will be displayed.

2.

Click the Parameters button, then click the Option tab.

3.

Click on ID-TAKING-OVER in the Option Name text box, and then click Statusbutton.

4.

The Option Status screen will be displayed, so selects Enable or Disable with a radiobutton, and click the OK button.


5.

A message indicating that the priced optional feature has been set will be displayed. Amessage confirming your request for restarting will be displayed, so click the OK buttonwhen restarting.

Note: To set effective the setting of the optional feature that you have operated, restart thearray unit. The feature is not yet set until restarting. When restarting is initiated, the arrayunit is not ready to accept an access from the host for duration from initiation until therestarting terminates. Therefore, after making sure that the host has stopped accessing,initiate restarting.

6.




Note: It may take time for an array unit to respond, depending on the condition of thearray unit. If it does not still respond after 10 minutes or more passes, check the conditionof the array unit.A message indicating that the restarting has terminated is displayed, so click the OKbutton. When clicking the OK button, the unit window is closed. To perform otheroperations, select again on the main window an array unit which to operate, and open theunit window.


Chapter 3

Setting and Canceling the Dual ActiveID Succession Function

The ID take-over control function is set up using the Disk Array Management Program. Thefollowing describes set up procedures performed by using the Disk Array ManagementProgram.

The system parameter the disk array unit is set in the wizard format.

Note: Before setting the system parameter of ID take-over control function, you must installthe option of the ID Take-over control function (DF F500-WD) and make its functionsselectable (open). (See Installing and Uninstalling)

If one of the controllers is blocked when connecting to the dual system, you cannot set thesystem parameter. Check that the disk array unit is in the warning state before setting.When you set the dual system though RS232C, be sure to do so from the controller 0 side.

1.

Starts the Disk Array Management Program and switches the mode of operating toManagement Mode. Registers an array unit in which to uninstall the ID take-over controlfunction and connects to the registered array unit. A unit window for the connected arrayunit will be displayed.Click on the Param Wizard button in the main window of Disk Array ManagementProgram.

The Param Wizard button can be operated regardless of the unit window currentlydisplayed.

22 Chapter 3 Setting and Cancelling the Dual Active ID Succession Function

2.

Click the Standard Setup radio button as shown in the following figure and then click onthe NEXT > button.

The following system parameter setting window is displayed.


3.

Click the Dual Active Mode or Hot Standby Mode radio button in the System StartupAttribute settings of the system parameter setting window. In SCSI ID/Port ID Take-over Mode, click the Used radio button.

4.

If an array unit is operated in dual active mode, select a controller which to set active inindividual ports for the Default Controller setting item on the system parameter settingscreen, by clicking the CTL0 or CLT1 radio button.

5.

The following operation differs depending on the host system connected. Therefore,follow the appropriate operation according to the host system connected.

When connecting to the RS/6000 (AIX) host system, click the Port xx (xx is portnumber of connecting to the RS/6000) button in the system parameter setting windowand then go to procedure 6.

When connecting to the host system other than RS/6000 (AIX), click the OK buttonin the system parameter setting window and then go to procedure 7.

6.

On the next screen, click the check box of the UA(06/2A00) suppress mode enableoption for the Host Connection Mode2 setting item, and next click the OK button.

Set up all ports with which an RS/6000 is connected in the same way as described above.


7.

Click the Yes radio button in the FD Backup settings in the following window and thenmakes sure that a backup FD has been inserted in the FDD of the array unit and then clickthe OK button.

FD Backup: The system parameter information is saved in the backup FD for the diskarray unit. When the setting is changed, reserving is required. Therefore, be sure to selectYes.

8.

When the setting ends, the following message is displayed. Click the OK button. Whenclicking the OK button, the array unit will be restarted, and the set system parameter willbe validated.

Note: To make a changed system parameter valid, restart the array unit. A part of hostcommand or Disk Array Management Program function cannot be executed until the unitis restarted.



Note: It may take time for an array unit to respond, depending on the condition of thearray unit. If it does not still respond after 10 minutes or more passes, check the conditionof the array unit.A message indicating that the restarting has terminated is displayed, so click the OKbutton. When clicking the OK button, the unit window is closed. To perform otheroperations, select again on the main window an array unit which to operate and open theunit window.

This is the end of the setting of the ID take-over control function. When setting change isrequired, conduct the setting operation again.


Hitachi Freedom Storage Thunder 9200 Dual Active ID Succession TM (5800/9200) Users Guide 2001 Hitachi Data Systems Corporation, ALL RIGHTS RESERVEDTrademarksNotice of Export ControlsDocument Revision LevelSource Document Revision LevelChanges in this RevisionPrefaceSafety PrecautionsContentsList of FiguresList of TablesChapter 1 Introducing Dual Active ID SuccessionFigure 1.1 Dual Active ID Succession and Transition of System Operation Failure or Recovery (Fibre Channel)Figure 1.2 Dual Active ID Succession and Transition of System Operation Failure or Recovery (Parallel SCSI)1.1 SpecificationsTable 1.1 Support for the Dual Active ID Succession FunctionFigure 1.3 Combined System Configuration of Host Cluster Configuration and Dual Active ID Succession (two HUB) Figure 1.4 Combined System Configuration of Host Cluster Configuration and Dual Active ID Succession (one HUB)Figure 1.5 Dual Active ID Succession Prohibited System with Fibre (two 9200 connected per loop)Figure 1.6 Dual Active ID Succession (Parallel SCSI model)

1.2 Restrictions1.2.1 Restrictions on configuration1.2.2 Restrictions on configuration setting1.2.3 Restrictions on the host1.2.4 Restrictions on operation

Chapter 2 Installing and Uninstalling Dual Active ID Succession2.1 Installation2.2 Uninstallation2.3 Setting to Enable or Disable

Chapter 3 Setting and Canceling the Dual Active ID Succession Function

hitachi thunder 9200 dual active id succession (5800/9200) user’s guide

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