NEC Storage Manager IS015-9E User Manual
  1. Manuals
  2. Brands
  3. NEC Manuals
  4. Software
  5. Storage Manager IS015-9E
  6. User manual
NEC Storage Manager IS015-9E User Manual

NEC Storage Manager IS015-9E User Manual

Data replication
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
NEC Storage Manager
Data Replication User's Manual

(Function Guide)

IS015-9E

Advertisement

Table of Contents
loading

Related Manuals for NEC Storage Manager IS015-9E

Summary of Contents for NEC Storage Manager IS015-9E

  • Page 1: Function Guide

    NEC Storage Manager Data Replication User’s Manual (Function Guide) IS015-9E...
  • Page 2 © NEC Corporation 2001-2004 No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation. The contents of this book may be modified without notice in the future.
  • Page 3 • NEC Storage BaseProduct Ver3.3 • NEC Storage ReplicationControl Ver3.3 3. The NEC Storage Manager is referred to as iSM or Storage Manager in the text of this manual. Also, the NEC Storage series disk array subsystem is referred to as a disk array.
  • Page 4 Description Corresponding Product Data Replication User’s Manual (Disaster NEC Storage Manager Data Replication User’s Manual Recovery System Installation and (Disaster Recovery System Installation and Operation Operation Guide) Guide) (IS027) Snapshot User’s Manual (Function NEC Storage Manager Snapshot User’s Manual (Function...

  • Page 5: Table Of Contents

    Contents Chapter 1 Data Replication Overview ..........................1 Data Replication ................................1 Examples of Applying Data Replication........................2 1.2.1 Backup .................................2 1.2.2 Test Environment Setting ............................4 1.2.3 Parallel Processing of Search Operation ......................5 System Configuration..............................6 Chapter 2 Data Replication ..............................8 Volume Classification ..............................8 Replication Operations ..............................10 2.2.1 Replicate ................................10...
  • Page 6 3.3.1 Pair Setting/Unpair ............................43 3.3.2 Replicate ................................50 3.3.3 Separate ................................54 3.3.4 Restore ................................58 3.3.5 Suspend/Resume Copy ............................63 3.3.6 Change to Background Copy..........................68 3.3.7 RV Mode Change ..............................71 3.3.8 Forced Separate ..............................74 3.3.9 Forced Unpair ..............................78 3.3.10 Freeze/Defreeze ..............................82 3.3.11 Background Copy Level Change........................83 3.3.12 Connection Screen.............................85 3.3.13...
  • Page 7 4.7.1 Logical Disk Information Display Command ....................172 4.7.2 Pair/Unpair Command.............................175 Disk Array Operations.............................178 4.8.1 Command for Displaying Information on the Replication Function...............178 Disk Operations...............................181 4.9.1 File System Flush Command...........................181 4.9.2 Volume Mount Command ..........................183 4.9.3 Volume Unmount Command...........................185 4.9.4 Disk Signature Operation Command.......................187 4.9.5 Devices Scan Command..........................189 Index...
  • Page 8 This page is intentionally left blank.

  • Page 9: Chapter 1 Data Replication Overview

    Chapter 1 Data Replication Overview Chapter 1 Data Replication Overview To manage an enormous amount of information accumulated in business in a unified way and promote effective and efficient utilization of the information, a high-throughput, large-capacity, and high-reliability storage system is required.

  • Page 10: Examples Of Applying Data Replication

    Chapter 1 Data Replication Overview When you introduce Data Replication and use replication volumes which can be separated, you can get the following benefits. • The system down time during data backup is largely reduced. Lowered access performance to the business database during data backup in system operation can be prevented.
  • Page 11 Chapter 1 Data Replication Overview The procedure for backup from a replication volume is described below. During operation, the master volume (MV) and replication volume (RV) are connected. Suspend the production task and separate the replication volume (RV). Resume the task after separation is complete.

  • Page 12: Test Environment Setting

    Chapter 1 Data Replication Overview You can set the same environment as the production task environment easily by creating replication volumes using the Data Replication function. You can evaluate an application program by using data used in the production task, which makes evaluation of application programs more efficient. Furthermore, in building an evaluation environment, operations are suspended only for the time which takes to separate replication volumes from the master volume.

  • Page 13: Parallel Processing Of Search Operation

    Chapter 1 Data Replication Overview By creating replication volumes of the master database, you can separate the database and carry out update tasks and search tasks using different volumes. This allows you to carry out database update tasks without affecting database search tasks. Daytime Nighttime Search Task...

  • Page 14: System Configuration

    Chapter 1 Data Replication Overview Business Server Backup Server Backup Software ReplicationControl Tape Drive ReplicationControl Management Server Replication • AccessControl • DynamicDataReplication Storage Manager • RemoteDataReplication Disk Array Figure 1-6 System Configuration To install and use the Data Replication function, the following hardware devices are required. •...
  • Page 15 Chapter 1 Data Replication Overview • Storage Manager Provides the disk array configuration and state display functions. Installing DynamicDataReplication and/or RemoteDataReplication allows the replication management function (hereinafter, referred to as the Replication Management) incorporated in iSM. The Replication Management provides setting and operating functions such as state display, pair setting, and replication operation for DynamicDataReplication or RemoteDataReplication.

  • Page 16: Chapter 2 Data Replication

    Chapter 2 Data Replication Chapter 2 Data Replication This chapter describes the types and state transitions of volumes that are necessary to perform operation using the Data Replication function. To create replication volumes using the Data Replication function, you must set the relation between the original volume and the target volume (replication volume) first.
  • Page 17 Chapter 2 Data Replication Disk Array A Disk Array B RV/MV (PV) (rRV) (dRV) Pair Setting Volume A1/A2/B1 : IV Volume A3 : MV (PV) of the pair A3/A4 Volume A4 : RV (dRV) of the pair A3/A4, and MV of the pair A4/B2 Volume B2 : RV (rRV) of the pair A4/B2 Figure 2-1 Example of Volume Classification...

  • Page 18: Replication Operations

    Chapter 2 Data Replication The replication operations include Replicate that replicates data from MV to RV, Separate that separates between MV and RV, and Restore that replicates data from RV to MV. This operation copies data from MV to RV. It is performed to replicate the latest data to the replication volume used in a test environment or search tasks.

  • Page 19: Restore

    Chapter 2 Data Replication This operation copies data from RV to MV. It is performed to restore data from the backup volume (RV) when a failure occurs in MV. When Restore is executed, the RV contents at the point of starting Restore are reflected copied into the MV.

  • Page 20: Replication Operations And State Transitions

    Chapter 2 Data Replication This section describes the replication operations and state transitions. The pair setting is specified Difference between MV and The pair setting is specified but MV and RV are separated. RV is being reflected. and synchronization has been established.

  • Page 21: Replicate And State Transitions

    Chapter 2 Data Replication When Replicate is performed, data copy from MV to RV starts to reflect the content of MV to RV. Any update to MV after Replicate is also reflected to RV. After Replicate is started, the difference between MV and RV gradually decreases, and eventually the content of MV at the beginning of Replicate is completely reflected to RV (The difference is zero).

  • Page 22: Separate And State Transitions

    Chapter 2 Data Replication When Separate is performed, the difference between MV and RV at the time of executing the Separate start instruction is reflected to RV and RV is separated. No update to MV after Separate is reflected to After Separate is performed, data copy to RV is performed if the contents of MV and RV at the beginning of Separate do not match, and all updates to MV before the Separate start instruction are reflected to RV.

  • Page 23: Restore And State Transitions

    Chapter 2 Data Replication When Restore is performed, data copy from RV to MV starts to reflect the content of RV at the beginning of Restore to MV. When Restore(update) is executed, any update to MV after Restore is also reflected to RV. After Restore is started, the difference between MV and RV gradually decreases, and eventually the content of RV at the beginning of Restore is completely reflected to MV (The difference is zero).

  • Page 24: Activity State And Synchronous State

    Chapter 2 Data Replication In data replication, Replicate, Restore, and Separate states are called “activity states”, or simply “activities”. The execution states indicating state transitions and the state in which the state transition is complete are called “synchronous states”. Table 2-1 shows the activity states and synchronous states which transit as a result of each replication operation.

  • Page 25: Copy Control State

    Chapter 2 Data Replication If the activity between volumes with the pair setting is the Replicate or Restore state, you can change the copy method of data between MV and RV according to the load status of the disk array. The state to which a transition is made by the instruction to change the copy method is called the “copy control state“.
  • Page 26 Chapter 2 Data Replication Copy control states can be specified when Replicate or Restore is performed. You can also change the copy control state you specified at Replicate or Restore as required. When Restore with RV protection specified is executed, only copy for reflecting the difference is executed, thus the updated data of the MV is not reflected into the RV.

  • Page 27: Relationship Between Copy Performance And Copy Control State

    Chapter 2 Data Replication If the copy control state is set to the Synchronized Copy state, the difference between MV and RV is not accumulated because updates to MV are immediately reflected to RV. However, the write time to MV is longer because it waits for reflection of the updates to RV. If the Copy Control state is set to the Suspend state, the difference between MV and RV is accumulated because updates to MV are not reflected to RV, but the write time to MV is the same as normal I/O.

  • Page 28: Rv Access Restriction

    Chapter 2 Data Replication In the Replicate state and Restore state, MV is synchronized with RV to always match the volume data between MV and RV. Since the difference between MV and RV is reflected in the disk array independently of the operating system or file system, however, the volume of RV may become inconsistent.

  • Page 29: Copy Faults And State Transitions

    Chapter 2 Data Replication Note 3: If “Read Only (RO)” is set for RV for which Separate was completed, keep the following operational notes in mind. <On the Windows system> 1. If NTFS is used as a file system, reference to the RV is disabled. 2.

  • Page 30: Freeze Of Disk Arrays

    Chapter 2 Data Replication If the power to the disk array is turned off for maintenance, access to the disk array is disabled, disallowing to continue copy operation for the paired volumes in the disk array. In this situation, the data replication function for the disk array stops replication operations of the whole disk array.

  • Page 31: Chapter 3 Replication Management

    Chapter 3 Replication Management Chapter 3 Replication Management This chapter describes various operations of Data Replication by the Graphical User Interface (GUI). This chapter describes an overview of various operations and the management method regarding data replication that uses the replication management function. Use the following functions to perform operations related to Data Replication through the iSM Client: •...

  • Page 32: Event Detection And Operation Message Output

    Chapter 3 Replication Management Table 3-1 lists the operations and state displays. Table 3-1 List of Displays/Operations of Data Replication Replication Management State Configuration Operation Item Operation Authorization Monitoring Setting Display Set Disk Array Name √ √ √ Set Logical Disk Name √...
  • Page 33 Chapter 3 Replication Management Table 3-2 List of Replication-Related Events Replication Management Operation Target Operation Other Operations Operation Disk array Freeze ∆ ∆ Defreeze Change Background Copy level ∆ Volume ∆ Pair Setting/Unpair Replicate ∆ ∆ ∆ Synchronous State (rpl/sync) Separate ∆...

  • Page 34: Notes On Operation

    Chapter 3 Replication Management Note the following points when operating replication management: [System Parameter Setting (on UNIX)] For more information, refer to the “User’s Manual (UNIX)”. [Messages at Start] Immediately after iSM is started, replication-related device information is created internally. Replication-related device information is recreated according to an information recreate instruction from ReplicationControl.

  • Page 35: Explanation Of Replication Screen

    Chapter 3 Replication Management To perform an operation, select the volumes you want to perform the operation to in the Volume List Displayed on the Replication Information tab in the Replication Screen, and then click the [menu] on the menu bar. You can also right-click the volume to display the menu. The Replication Screen consists of the configuration display area (i) on the left part of the screen displaying the configuration and state of the disk array and the information list display area (ii) on the right part of the screen displaying the Volume List and disk array link configuration.

  • Page 36: Configuration Display Area

    Chapter 3 Replication Management The configuration display area is under the monitoring by the iSM and displays the list and the state of the Disk Arrays that can use the Replication function, as well as the status of link among them. Figure 3-2 Example of Configuration Display Area...
  • Page 37 Chapter 3 Replication Management Disk Array icon Icon Description Indicates that the disk array is normally operating. , etc. (in colors) Indicates that the license capacity of the DynamicDataReplication, RemoteDataReplication, or RemoteDataReplication/DisasterRecovery is insufficient. * If license capacity is insufficient, you cannot execute pair setting/unpair. Indicates that the fault occurs in any link path between disk arrays.

  • Page 38: Replication Information Screen

    Chapter 3 Replication Management license • Unmanaged disk arrays When click the [Replication Information] tab in the information list display area, the volume information of the volumes in the selected disk array is displayed (refer to Figure 3-3 “Example of Replication Information Screen”).
  • Page 39 Chapter 3 Replication Management Classification The volume types (volume attributes) are displayed. Displayed Icon Description MV. Indicates Master Volume which is the volume of replication origin. (Green) RV. Indicates Replication Volume which is the volume of replication target. (Light Blue) IV.
  • Page 40 Chapter 3 Replication Management (iv) Logical Disk Name The identification name or identifier (see Note ) given for the logical disk is displayed. It is the same as the logical disk name displayed in the main screen (State Monitoring screen) and can be changed from the main screen (State Monitoring screen).
  • Page 41 Chapter 3 Replication Management (viii) Disk Array The identification name given to the Disk Array including the volume indicated by “Pair Number” is displayed. It is the same as the Disk Array Name displayed in the main screen (State Monitoring screen), and can be changed from the main screen (State Monitoring screen).
  • Page 42 Chapter 3 Replication Management Copy Control State The control status in copying is displayed. For more information, refer to 2.4 “Copy Control State”. Display Description Foreground Copy Indicates the copy state in the synchronous or semi-synchronous mode. Background Copy Indicates the asynchronous copy state by difference management. Freeze Indicates that the data replication function is frozen.
  • Page 43 Chapter 3 Replication Management (xiv) Number of Pairs Indicates the number of related pairs. This value is equal to “the number of volumes which make up the pair link” minus 1. An example of pair relations and Number of Pairs is shown below. Number of Pairs Pair Relation Some replication operations cannot be carried out while in the Replicate state, Restore state, or...

  • Page 44: Disk Array Link Information Screen

    Chapter 3 Replication Management When you click the [Disk Array LINK Information] tab in the information list display area, the link information currently set between the disk arrays is displayed (refer to Figure 3-4 “Example of Disk Array LINK Information Screen”). To perform sort, click the item name by which you want to sort.
  • Page 45 Chapter 3 Replication Management (ii) LINK Disk Array Name Indicates the identification name assigned to the linked disk array. (iii) Path Number Indicates the connection path number in the link. If the link is connected via four paths, the path numbers are 0, 1, 2, and 3, respectively (refer to Figure 3-5 “Replication Link Information”).
  • Page 46 Chapter 3 Replication Management Figure 3-5 shows an example of two disk arrays connected to Disk Array 1 for using RDR. The following shows an example of 3000/4000 series. Director Number Port Number Path Number LINK Number #00h Path #00h Path #01h #05h Path #02h...

  • Page 47: Menu Item List

    Chapter 3 Replication Management The list of menu bar items of Replication Management is shown below. For details, refer to description on each menu item. 3.3.13 “CSV Output of Information List Display” 3.3.14 “Save Pair Setting Information” Closes the Replication screen. Shows or hides the status bar.
  • Page 48 Chapter 3 Replication Management 3.3.8 “Forced Separate” 3.3.9 “Forced Unpair” 3.3.10 “Freeze/Defreeze” 3.3.11 “Background Copy Level Change” For details on operations related to the AT-group, refer to the “Data Replication User’s Manual (Disaster Recovery System Installation and Operation Guide)”. Displays Help on the Replication screen. Displays Help on the dialog list regarding Replication screen.

  • Page 49: Information Displayed On Execution Dialog

    Chapter 3 Replication Management The Execution dialog displayed for replication operations can be switched to [Summary] or [Details] display mode for the volume-related information displayed. In the description given below, the unpair execution dialog is used as an example. You can read “operation”...
  • Page 50 Chapter 3 Replication Management (iv) Logical Disk Name Displays the logical disk name of MV. Copy Control State Displays the control state during copy. (vi) Sync State Displays the transition status in the activity state. (vii) Copy Mode Displays the Synchronous/Semi-synchronous mode during copy operation. (viii) Number Displays the logical disk number of MV.

  • Page 51: Various Operations Of Replication Management

    Chapter 3 Replication Management To perform replication operations, you must set pairs beforehand. To set a pair, set the original volume as MV and the target volume as RV. You can also use the volume you have set as RV in another pair by setting it as MV. You can set pairs freely within the following bounds.
  • Page 52 Chapter 3 Replication Management [Operation Procedure] Pair Setting Do one of the following to display the Pair Setting screen. Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, and then select [Pair Setting]. Right-click in the Replication Information screen, and then select [Pair Setting].
  • Page 53 Chapter 3 Replication Management Figure 3-9 shows an example of the Pair Setting Screen. (ii) (iii) (iv) Figure 3-9 Example of Pair Setting Screen After the Pair Setting, the copy operation such as Replicate, Restore etc. is available. (i) Data Replication Mode Select the method of setting pairs.
  • Page 54 Chapter 3 Replication Management : All volumes become selectable objects. LD Set Name : Volumes registered in the selected LD Set become selectable objects. Undefined : Volumes not registered in the LD Set become selectable objects. (v) Logical Disk Select the Logical Disk which you want to set. When you click the [Execute] button, the following message is displayed.
  • Page 55 Chapter 3 Replication Management From the list, select a pair you want to unpair, and then click the [Execute] button. You can select multiple executable pairs and execute them in a batch. Unexecutable pairs cannot be selected. Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen.
  • Page 56 Chapter 3 Replication Management [Execution Conditions] To Pair setting or Unpair, the following conditions must be satisfied. Conditions for Pair setting Volumes in which the pair setting is performed must satisfy the following conditions. The volume capacities of MV and RV match. (ii) The specified RV is not set as RV for another pair.
  • Page 57 Chapter 3 Replication Management RV unmounted by the ReplicationControl function from a business server or backup server of Windows may be set in the Not Ready state. In this case, even if the synchronous state of the pair is “separated”, the RV mode is kept in the Not Ready state. Make sure to change the RV set in the Not Ready state to the R/W Permit state by “RV mode change”...

  • Page 58: Replicate

    Chapter 3 Replication Management When you perform Replicate for volumes with the pair setting, copy from MV to RV starts. [Operation Procedure] Do one of the following to display the Replicate screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Replicate].
  • Page 59 Chapter 3 Replication Management For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Replicated Execute it for a volume in the Separate state. Restored Execute it for a volume in the Separate state.
  • Page 60 Chapter 3 Replication Management (iv) Copy Mode You can specify the copy control state in Replicate Execution and the Synchronous state at the same time as Replicate. The following copy modes can be specified. Radio Button Description Synchronous Changes the copy control state to the foreground copy (Synchronous) mode.
  • Page 61 Chapter 3 Replication Management (vi) The activity state of the pair of the specified MV and the paired upper MV is not in the Restore state. (vii) The activity state of the pair of the specified RV and the paired lower RV is not in the Restore state.

  • Page 62: Separate

    Chapter 3 Replication Management If Separate is performed for paired volumes, MV is separated from RV and RV is made available. RV cannot be reused until Separate is completed. However, it can be used for Separate(immediate). [Operation Procedure] Do one of the following to display the Separate screen. •...
  • Page 63 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 64 Chapter 3 Replication Management (iii) RV Use Start Time Determine when to make the RV available. Radio Button Description Separate End After Separate execution, the RV becomes available when the difference between the MV and RV contents has been reflected into the RV (Separate(completion)).
  • Page 65 Chapter 3 Replication Management Figure 3-18 illustrates the execution conditions of Separate. (Each of (i) to (viii) in the figure corresponds to the respective number above.) Replication Target Disk (ii) Pair Setting (iii) Not in Restore execution (iv) Not in the Freeze state Disk array monitored (vi) MV is unmounted from the host.

  • Page 66: Restore

    Chapter 3 Replication Management When you perform Restore for volumes with the pair setting, copy from RV to MV starts. [Operation Procedure] Do one of the following to display the Restore screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Restore].
  • Page 67 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 68 Chapter 3 Replication Management (iii) Active Mode Specify a Restore operation mode. Radio Button Description RV Protection Performs restoration without reflecting the updated data of the MV into the When the restoration is completed, Separate is automatically executed. * To use this function for paired volumes located in the same disk array, the DynamicDataReplication Ver2 is necessary, and to use this function for paired volumes located in different disk arrays, the RemoteDataReplication Ver2 is necessary.
  • Page 69 Chapter 3 Replication Management (vi) RV Status Specifies the access restrictions from the host until Restore is complete. Radio Button Description Not Ready Operations for the volume cannot be performed from the host. Read Only For the volume, only read can be performed from the host. * Care should be taken to specify Read Only.
  • Page 70 Chapter 3 Replication Management Figure 3-21 illustrates the execution conditions of Restore. (Each of (i) to (xiii) in the figure corresponds to the respective number above.) Replication Target Disk (vi) Separated (ii) Pair Setting (xii) Separate is not (iii) Separated being performed (iv) Semi-synchronous not...

  • Page 71: Suspend/Resume Copy

    Chapter 3 Replication Management You can suspend and resume copy operation in the Replicate or Restore state. [Operation Procedure] Suspend Copy The Foreground Copy or Background Copy state is changed to the Suspend Copy state. Do one of the following to display the Suspend Copy screen. •...
  • Page 72 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 73 Chapter 3 Replication Management Figure 3-23 shows an example of the Resume Copy screen. selected Cannot be selected Selected (ii) (iii) Figure 3-23 Example of Resume Copy Screen From the list, select a pair for which you want to perform the operation, and then click the [Execute] button.
  • Page 74 Chapter 3 Replication Management Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Foreground Copy State Execute it for a volume in the Suspend state. Separate State Execute it for a volume in the Suspend state. Freeze Defreeze the Data Replication function and execute it again.
  • Page 75 Chapter 3 Replication Management [Execution Conditions] To perform operations of suspending/resuming copy, the following conditions must be satisfied. (i) The target MV is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired. (iii) The activity state of the target pair is Replicate or Restore.

  • Page 76: Change To Background Copy

    Chapter 3 Replication Management The copy control state is changed from the Replicate or Restore state to the Background Copy state. [Operation Procedure] Do one of the following to display the Change to Background Copy screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Change to Background Copy].
  • Page 77 Chapter 3 Replication Management Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Separate State Execute it for a volume in the Replicate state or Restore state. Already Background Copy Execute it for a volume in Foreground Copy. State Freeze Defreeze the Data Replication function and execute it again.
  • Page 78 Chapter 3 Replication Management Figure 3-28 illustrates the execution conditions of changes to Background Copy. (Each of (i) to (vi) in the figure corresponds to the respective number above.) Replication Target Disk (ii) Pair Setting (iii) Replicate or Restore (iv) Not in the Freeze state Target Pair (v) Disk array monitored (vi) The specified MV is not...

  • Page 79: Rv Mode Change

    Chapter 3 Replication Management You can change the RV access restriction. [Operation Procedure] Do one of the following to display the RV Mode Change screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [RV Mode Change].
  • Page 80 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 81 Chapter 3 Replication Management When you click the [Execute] button, the following message is displayed. Figure 3-30 Confirmation Screen When it is performed for a volume in Replicate, Restore, or Separate execution, the following warning message is displayed and the change of the RV mode of the volume is cancelled. Figure 3-31 Warning Screen [Execution Conditions] To change the RV mode, the following conditions must be satisfied.

  • Page 82: Forced Separate

    Chapter 3 Replication Management When a failure occurs in the connection between disk arrays and the normal Separate cannot be performed on MV and RV, you can use Forced Separate to instruct Separate to MV and RV individually. Forced Separate forcibly separates MV and RV and makes RV available. [Operation Procedure] Do one of the following to display the Forced Separate screen.
  • Page 83 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 84 Chapter 3 Replication Management Figure 3-34 is displayed when MV is not under the iSM. Figure 3-35 is displayed when RV is not under the iSM. After execution, perform Forced Separate for MV or RV not separated. Figure 3-34 Warning Screen for MV without under iSM Figure 3-35 Warning Screen for RV without under iSM When you click the [Yes] button, the following message is displayed.
  • Page 85 Chapter 3 Replication Management [Execution Conditions] To perform Forced Separate, the following conditions must be satisfied. The target volume is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly separated. (iii) The disk array where the specified MV and RV are stored is not in the Freeze state.

  • Page 86: Forced Unpair

    Chapter 3 Replication Management When a failure occurs in the disk array of MV or RV, monitoring is suspended and the normal Cancel Pair may not be performed. In such a case, you can use Forced Unpair to unpair the pairs for MV and RV separately.
  • Page 87 Chapter 3 Replication Management Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired...
  • Page 88 Chapter 3 Replication Management If Forced Unpair is performed for either MV or RV, the replication operations will not function properly because inconsistency occurs in the recognized states of MV and RV. In this case, perform Forced Unpair for MV or RV for which Unpair is not performed. Figure 3-39 is displayed when MV is not under the iSM.
  • Page 89 Chapter 3 Replication Management [Execution Conditions] To perform Forced Unpair, the following conditions must be satisfied. The target volume is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly unpaired. (iii) The target pair is in the Separated or Forced Separate state.

  • Page 90: Freeze/Defreeze

    Chapter 3 Replication Management You can freeze or defreeze the Data Replication function of the disk array. [Operation Procedure] Do one of the following to display the Freeze/Defreeze screen. • Select the disk array in the configuration display area, click [Operation] on the menu bar of the Replication screen, point to [System Operation], and then select [Freeze/Defreeze].

  • Page 91: Background Copy Level Change

    Chapter 3 Replication Management [Execution Conditions] To perform Freeze/Defreeze, the following conditions must be satisfied. The target disk array is recognized by Replication Management. (ii) The specified disk array is monitored. When you perform Freeze, no replication operations can be performed in the disk array. Refer to 2.8 “Freeze of Disk Arrays”.
  • Page 92 Chapter 3 Replication Management Background Copy Level Specifies the priority of copy operation when Background Copy is selected in Replicate and Restore. A higher priority results in faster copying for reflecting difference. (For more information, refer to 2.4 “Copy Control State”.) •...

  • Page 93: Connection Screen

    Chapter 3 Replication Management The connection state of the volume is displayed. [Operation Procedure] Do one of the following to display the Volume Connection screen. Select a volume in the Replication Information screen, point to [View] on the menu bar of the Replication screen, and then select [Connection Screen].
  • Page 94 Chapter 3 Replication Management Disk Array Name Displays the name of the disk array where the volume exists. The disk array name of the selected volume is highlighted. (ii) Logical Disk Number, Format, Logical Disk Name Displays them in the form of “(logical disk number) format:logical disk name (or VAA)”. The logical disk number, format, and logical disk name of the selected volume is highlighted.
  • Page 95 Chapter 3 Replication Management [Connection Display of Paired Volumes] Connections of volumes are displayed as pipes as shown below. During copy operation, the color of the original disk moves through the pipe. For DynamicDataReplication Replicate is executed : Replicate is complete : Restore is executed : Restore is complete : Separate is executed :...
  • Page 96 Chapter 3 Replication Management [Differential Quantity of Volume/Transfer Rate] Displays the amount of difference and transfer rate during copy operation. The unit of the amount of difference is variable (e.g. KB, MB, GB), and the unit of transfer rate is fixed (MB/S).
  • Page 97 Chapter 3 Replication Management In the pair connected by RemoteDataReplication, the remote disk array is not managed by iSM or, in a monitoring stop, may be displayed like the above. In the pair connected by RemoteDataReplication, when Remote Volume cannot be recognized from the host computer which Local Volume has connected by having performed Forced Unpair to Remote Volume etc., it may display like the above.
  • Page 98 Chapter 3 Replication Management Example of Display 2: Separate during Replicate Replicate Execution Separate is executed. Separate Execution Turns to the layer color because Separate is complete. Separate is complete. [Others] You can perform the replication operations by right-clicking the volume in the Connection screen. For how to operate, refer to the items in 3.3.

  • Page 99: Csv Output Of Information List Display

    Chapter 3 Replication Management The replication information, the disk array LINK Information, and the AT-group information for the specified disk array can be output to a file in CSV format. This CSV file can be used as a data for spreadsheet software. On the menu bar, do the following: •...
  • Page 100 Chapter 3 Replication Management [CSV File Containing Information Display List] This section shows an example of the CSV file that is created by executing the CSV output of information display list. In this file, the information displayed on the screen is written in the format in which each item is separated by commas.

  • Page 101: Save Pair Setting Information

    Chapter 3 Replication Management This function saves the pair setting information for the selected disk array to a file. On the menu bar, do the following: • Click [File], and then click [Save the Pair Setting Information]. Figure 3-49 shows an example of the Save Pair Setting Information screen. Figure 3-49 Example of Save Pair Setting Information Screen A file that stores pair setting information can be used for “Replication Setting”...
  • Page 102 Chapter 3 Replication Management Table 3-3 Pair List Format Rules Item Syntax Description Number Pair Name List Identifier of this file. A space between characters is a half size. MV DiskArrayName Name of the disk array where the Master Volume (MV) belongs. The maximum number of characters is 32.

  • Page 103: Environment Setting

    Chapter 3 Replication Management The interval to obtain disk array information is specified. It is the interval to obtain copy progress information in the screen display. On the menu bar, do the following: • Click [View], and then click [Environment Setting]. Figure 3-50 shows an example of the Environment Setting screen.

  • Page 104: Record Screen Information

    Chapter 3 Replication Management When you perform [Refresh], the following message is displayed. Figure 3-51 Warning Screen for Refresh The screen information of Replication Screen is recorded. The recorded information is reflected the next time the Replication Management screen is activated. On the menu bar, do the following: •...

  • Page 105: Display Disk Array Properties

    Chapter 3 Replication Management The setting states of the device are displayed. Do the following: • Select a disk array in the configuration display area, click [View] on the menu bar, and then select [Properties]. • Select a disk array in the configuration display area, right-click it, and then select [Properties]. Figure 3-52 shows an example of the Disk Array Properties screen.

  • Page 106: Display Link Properties

    Chapter 3 Replication Management (iii) Replication Status Indicates whether the Data Replication function of the disk array is available. Display Description READY Indicates that it is operable. FREEZE Indicates that the Data Replication function is frozen due to a power down process of the disk array or acceptance of a Freeze instruction.
  • Page 107 Chapter 3 Replication Management Figure 3-53 Example of Link Properties Screen The items indicate the following information (Refer to Figure 3-5 “Replication Link Information”). Link Disk Array Name Indicates the identification name assigned to the linked disk array. (ii) Path Number Indicates the link path number of the selected link information.
  • Page 108 Chapter 3 Replication Management (vii) Path State Display Description Normal Indicates the normal status. Offline Indicates that the link setting is unconfirmed during startup of the disk array. Freeze Indicates that the Data Replication function in the target disk array is frozen.

  • Page 109: Display Copy Fault List

    Chapter 3 Replication Management The copy fault list displays the pairs where a copy fault occurred. When a copy fault occurs, do the following to recover from the fault. * The pair registered in AT-group cannot be recovered from the copy fault list screen. * Unless you have acquired the volume information of the disk array that has a copy fault, no faults are displayed on the copy fault list screen.
  • Page 110 Chapter 3 Replication Management Status Status Description Fault Forcefully separated in the disk array due to a copy fault. Abnormal Suspend Forcefully suspended in the disk array due to a copy fault. (ii) Replicate Performs Replicate for the selected pair. This operation can be performed for a volume in the Fault state.

  • Page 111: Chapter 4 Functions Of Replicationcontrol

    Chapter 4 Functions of ReplicationControl Chapter 4 Functions of ReplicationControl This chapter describes how to operate functions of the ReplicationControl that runs on the business server. The ReplicationControl functions include the creation and display of the volume list, replication operations, pair operations, and disk operations that are necessary for operating MV’s and RV’s in the system.

  • Page 112: Command List

    Chapter 4 Functions of ReplicationControl Table 4-1 shows the commands of the ReplicationControl. For details of each command, refer to the “Data Replication Command Reference”. Table 4-1 The List of ReplicationControl Commands Target System Command Name Operation Description Windows UNIX Volume List Associates logical disk (disk array side) Creation/Display...

  • Page 113: Operation Types

    Chapter 4 Functions of ReplicationControl To use ReplicationControl, the following operations can be selected. Direct operation for a disk array This operation performs via FC directly a volume (MV or RV) connected to the server and recognized by OS. This operation type is the most basic type when replication operation is performed by a business server.

  • Page 114: Direct Operation For A Disk Array

    Chapter 4 Functions of ReplicationControl Table 4-2 Operation Form Direct Operation of Operation Linked with Command Name Operation Disk Array Volume List Creation/Display − iSMvollist iSMrc_replicate Replicate iSMrc_separate Separate iSMrc_restore Restore iSMrc_change Change Copy Control State iSMrc_wait Wait for state iSMrc_query Paired Volume State Display iSMrc_sense...
  • Page 115 Chapter 4 Functions of ReplicationControl Business Server Backup Server ReplicationControl ReplicationControl Volume List Volume List FC Connection FC Connection AccessControl Figure 4-1 Direct Operation to MV or RV Volumes A volume (control volume) is prepared to issue an I/O to a disk array, and operation is performed through the control volume.
  • Page 116 Chapter 4 Functions of ReplicationControl Business Server Backup Server ReplicationControl ReplicationControl Volume List Volume List Control Volume FC Connection FC Connection AccessControl Figure 4-2 Operation Using a Control Volume In the ReplicationControl environment setting, you need to set DIRECT (issue an I/O to a disk array directly) for I/O issuing path to a disk array.

  • Page 117: Operations Linked With Ism

    Chapter 4 Functions of ReplicationControl Operating ReplicationControl together with the replication management function of the iSM enables you to operate and maintain the data replication function, and to construct the environment, such as pairing and unpairing by commands, which have been conventionally conducted by the client of the iSM through GUI.
  • Page 118 Chapter 4 Functions of ReplicationControl [Notes on Operation] For operations linked with the iSM, pay attention to the following. In the operations linked with the iSM, replication is operated in the asynchronous state with operations. To perform replication operation linked with operations, be sure to install ReplicationControl on each server and perform operation linked with operations of each server because operation of a file system needs to be performed on the business server and the backup server and data consistency needs to be secured.

  • Page 119: Volume Types

    Chapter 4 Functions of ReplicationControl Types of volumes that are specified as operation targets for data replication commands are as follows: Table 4-3 shows the list of volume types. Table 4-3 List of Volume Types Target System Type Description Identifier Windows UNIX Specifies a logical disk name set on the disk...

  • Page 120: Replication Operation File

    Chapter 4 Functions of ReplicationControl To perform the batch setting of multiple pairs by executing replication and pair operation commands, or to execute multiple commands for a specific pair, use the replication operation file. Using the replication operation file allows operation target pairs to be described in the file, managed and shared, thereby improving system operations and maintenance performance of the data replication.

  • Page 121: Volume List Creation/Display

    Chapter 4 Functions of ReplicationControl The function to create and display the volume list associates logical disk information (disk array side) with system dependent information (server side) and displays the associated information. Since it handles system dependent information, the function on the Windows system is different from the function on the UNIX system.
  • Page 122 Chapter 4 Functions of ReplicationControl The iSMvollist command corresponds to the system information on the logical disk of the disk array that can be recognized from a business server and saves necessary volume information in the volume list. Only the volumes that have already been registered in the volume list can be specified when data replication or snapshot operation is performed.
  • Page 123 Chapter 4 Functions of ReplicationControl -ad option: Displays information only associated with a specified drive name or a path name of the NTFS folder. -ap option: Displays information only associated with specified logical disk numbers. -av option: Displays information only associated with specified mount point volume names. -ah option: Displays information only associated with specified HBT.
  • Page 124 Chapter 4 Functions of ReplicationControl (iii) When the -a option is specified: Correspondence information about logical disks as shown below is listed. LD Name OS Type Disk No. Disk Array Volume Name Path ldn ld_name type disk_num disk_array_name volume_name path Description ldn: Logical disk number...
  • Page 125 Chapter 4 Functions of ReplicationControl When the -p option is specified: Property information of the volume list as shown below is listed. --- Property of Volume List File --- Version version Created YYYY/MM/DD hh:mm:ss Owner Host Name host_name Disk Array disk_array_number Volume Information volume_number...
  • Page 126 Chapter 4 Functions of ReplicationControl Disk Array disk_array_number Volume Information volume_number Description X.X.XXX: Version information on the executed iSMvollist command YYYY/MM/DD HH:MM:SS: Execution date of the iSMvollist command disk_array_name: Disk array name number: Number of logical disk information (volume information) items for each disk array registered in the volume list ldn: Logical disk number...

  • Page 127: Command Operations (Unix)

    Chapter 4 Functions of ReplicationControl On the UNIX system, by using the volume list creation and display function by means of the iSMvollist command, it is possible to obtain and display special file name, logical disk name, and associated OS type (hereafter, volume list) of the logical disks in the disk arrays.
  • Page 128 Chapter 4 Functions of ReplicationControl special file. -vl option: Displays information only associated with specified disk arrays sorted by using logical disk number as the key. If a specific logical disk number is specified, the system displays information only associated with the specified logical disk number.
  • Page 129 Chapter 4 Functions of ReplicationControl Description ldn: Logical disk number ld_name: Logical disk name vaa: VAA (Volume Absolute Address) type: OS type special_file_name: Special file name disk_array_name: Disk array name path: Whether to use a special file Usually this field is blank and nothing appears in this field, however, when data replication or snapshot is performed, if an error is detected in access to the special file, “B”...
  • Page 130 Chapter 4 Functions of ReplicationControl When the -p option is specified: Property information of the volume list as shown below is displayed. --- Property of Volume List File --- Version version Created YYYY/MM/DD hh:mm:ss Owner Host Name host_name Disk Array disk_array_number Volume Information volume_number...
  • Page 131 Chapter 4 Functions of ReplicationControl Description X.X.XXX: Version information of the executed iSMvollist command YYYY/MM/DD HH:MM:SS: Execution date of the iSMvollist command disk_array_name: Disk array name number: Number of logical disk information items (special file) for each disk array registered in the volume list ldn: Logical disk number ld_name:...

  • Page 132: Gui Operations (Windows)

    Chapter 4 Functions of ReplicationControl On the Windows system, the volume list creation and display function can be used via the GUI. The GUI functions include volume list display, selective display of disk arrays, and creation and update of the volume list. The function to define control volumes used for the business server to operate the data replication or snapshot function is also provided.
  • Page 133 Chapter 4 Functions of ReplicationControl (iii) Toolbar buttons Toolbar Button Description Clicking this button has the same effect as selecting [Create/Update Volume List] from the menu. [Create/Update Volume List] Clicking this button has the same effect as selecting [Define Control Volume] from the menu.
  • Page 134 Chapter 4 Functions of ReplicationControl (xiv) Disk Array Displays disk array names in the Volume List file. (xv) Classification Displays the type (volume attribute) of volumes regarding data replication and snapshot by obtaining from a disk array. The information items (vi) to (xiv) above are displayed by obtaining from the volume list, however, the information items (iv) and (xv) are displayed by obtaining from a disk array.
  • Page 135 Chapter 4 Functions of ReplicationControl This section describes the procedures for starting and terminating the Volume List Display function. [Operation Procedure] Starting Volume List Display screen Select [Start] of Windows → [Programs] ([All Programs] for Windows Server 2003) → [Storage Manager Volume List] →...
  • Page 136 Chapter 4 Functions of ReplicationControl Click the pull-down button of disk array Selection Combo box on the screen of Volume List Display, and select the target disk array. The information of only the selected disk array is displayed. [Operation Procedure] Select the target disk array from the disk array Selection Combo box on the screen of Volume List Display.
  • Page 137 Chapter 4 Functions of ReplicationControl To update the Volume List, select [File] and then select [Create/Update Volume List] on the Volume List Display screen. [Operation Procedure] Select [File] and then select [Create/Update Volume List] on the Volume List Display screen. The following inquiry message is displayed: Figure 4-8 Execution Confirmation Screen for Create/Update Volume List Clicking the [OK] button executes Create/Update Volume List.
  • Page 138 Chapter 4 Functions of ReplicationControl The information displayed on the Volume List Display screen is output as a CSV file and then saved. [Operation Procedure] Select [File] and then select [CSV Output of Information List] on the Volume List Display screen. The CSV Output of Information List screen appears.
  • Page 139 Chapter 4 Functions of ReplicationControl [File Example] The following example shows the CSV file that is output as the result of the CSV output of the information display list. Drive Letter/Path Name,Volume Name,Disk No.,Volume Definition,LUN,LDN,LD Name, Disk Array,Classification,Paired/Linked Logical Disk Information List -,\\?\Volume{cce89866-4d87-11d8-92a3-806d6172696f}\,disk1,Control,000h,000ah,BACK UP_CV,Tokyo_Customer_DataBase, IV,- E:,\\?\Volume{cce89867-4d87-11d8-92a3-806d6172696f}\,disk2,-,001h,0005h,DB_DATA_...
  • Page 140 Chapter 4 Functions of ReplicationControl To check property information of the volume list, select [File] → [Properties] on the Volume List Display screen. [Operation Procedure] To display property information, select [File] → [Properties] on the Volume List Display screen. To return to the Volume List Display screen, click the [Close] button. Figure 4-13 Property Information of Volume List Version Displays the version information of the Storage Manager Volume List used to create the volume...
  • Page 141 Chapter 4 Functions of ReplicationControl To select whether to view or hide the toolbar, specify [View] → [Toolbar] on the Volume List Display screen. View Figure 4-14 Viewing Toolbar Hide Figure 4-15 Hiding Toolbar To select whether to view or hide the status bar, specify [View] → [Status Bar] on the Volume List Display screen.
  • Page 142 Chapter 4 Functions of ReplicationControl To update the information of the Volume List file, select [View] and then select [Update Display Information] on the Volume List Display screen. The Volume List file contents are obtained and the Volume List Display screen is automatically updated.
  • Page 143 Chapter 4 Functions of ReplicationControl Display items on the Define Control Volume screen are described below. Selected Volume List Lists already-registered control volumes. Displays a logical disk selected as a control volume. (ii) Candidate Volume List Lists candidates of logical disks that can be registered as a control volume. Displays logical disks that can be registered as a control volume.
  • Page 144 Chapter 4 Functions of ReplicationControl Figure 4-19 Register Control Volume Figure 4-20 Change Control Volume...
  • Page 145 Chapter 4 Functions of ReplicationControl When you try to change a control volume that has already been registered in [Candidate Volume List], the following confirmation screen appears. To change the control volume to the logical disk selected from [Selected Volume List], click the [Yes] button.
  • Page 146 Chapter 4 Functions of ReplicationControl When you click the [OK] button on the Define Control Volume screen, the message for confirming whether to save the definition information appears. Figure 4-23 Save Confirmation Screen of Define Control Volume Screen When you click the [Yes] button for the confirmation, the definition information is saved and the completion message appears.
  • Page 147 Chapter 4 Functions of ReplicationControl Figure 4-25 Cancel Confirmation Screen of Define Control Volume Screen Update the volume list to reflect the updated definition information to the volume list. Select [File] → [Create/Update Volume List] from the Volume List Display screen to create and update the volume list, and reflect the saved definition information of the control volume to the volume list for registration.

  • Page 148: Replication Operations

    Chapter 4 Functions of ReplicationControl Replication operation commands provide a function to operate volumes by using disk array’s Data Replication function as well as a function to obtain and display a variety of information. For Replicate, the iSMrc_replicate command is used. By executing the iSMrc_replicate command, copy from MV to the paired RV starts.
  • Page 149 Chapter 4 Functions of ReplicationControl Specifying the Copy Control state (-cpmode) You can specify the Copy Control state during Replicate execution or in the Synchronous state. The following can be specified. Synchronous Copy (-cpmode sync) Changes the Copy Control state to the Synchronous Copy mode. Semi-synchronous Copy (-cpmode semi) Changes the Copy Control state to the Semi-synchronous Copy mode.
  • Page 150 Chapter 4 Functions of ReplicationControl [Displayed Information] The iSMrc_replicate command displays messages when Replicate starts, during execution, and when Replicate ends. On the Windows system [Start message] Replicate Start YYYY/MM/DD hh:mm:ss MV:disk_number ld_name type volume_name path RV:disk_number ld_name type volume_name path [Execution message] Replicating..
  • Page 151 Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Replicate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Replicating..[End message] Replicate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description The execution message and the end message appear only when -wait has been specified to wait for the Copy completion state.
  • Page 152 Chapter 4 Functions of ReplicationControl (ix) The Activity State of the pair of the specified MV and the paired upper MV is not in the Restore state. The Activity State of the pair of the specified RV and the paired lower RV is not in the Restore state.
  • Page 153 Chapter 4 Functions of ReplicationControl Pair setting (ii) MV or RV has been (ix) Not in the Restore State registered in the volume Target Pair list. (iii) The volume list is not being created or updated (iv) RV has been unmounted. (v) Disk array is not in the Freeze state.

  • Page 154: Separate Command

    Chapter 4 Functions of ReplicationControl For Separate, the iSMrc_separate command is used. The iSMrc_separate command separates RV from MV and makes RV available from the system. MV and RV must be set as a pair. [Main Options] For iSMrc_separate command, you can specify the following options regarding the Separate operation. Specifying paired volumes Specify MV and RV volumes.
  • Page 155 Chapter 4 Functions of ReplicationControl No Wait (-nowait) Performs only a Separate start instruction and terminates the command. You can check the termination of the command by the iSMrc_query or iSMrc_wait command. Forced Separate (-force) If a fault occurs in the connection between disk arrays and the normal Separate cannot be performed for MV and RV, you can specify the -force option to instruct Separate to MV and RV separately.
  • Page 156 Chapter 4 Functions of ReplicationControl [Displayed Information] The iSMrc_separate command displays messages when Separate starts, during execution, and when Separate ends. On the Windows system [Start message] Separate Start YYYY/MM/DD hh:mm:ss MV:disk_number ld_name type volume_name path RV:disk_number ld_name type volume_name path [Execution message] Separating...
  • Page 157 Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Separate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Separating... [End message] Separate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description The execution message and the end message appear only when -wait has been specified to wait for the Separated state.
  • Page 158 Chapter 4 Functions of ReplicationControl (ix) When an LVM volume group or a VxVM disk group is specified, the target volume group or disk group must be active (UNIX only). When specifying the combination of an LVM volume group or a VxVM disk group with a special file name (logical disk name), you must specify the same number of logical volumes that make up the volume group or disk group as MV (RV) on the special file name (logical disk name) side.

  • Page 159: Restore Command

    Chapter 4 Functions of ReplicationControl For Restore, the iSMrc_restore command is used. By executing the iSMrc_restore command, copy from RV to the paired MV starts. Before Restore is performed, MV and RV to be specified must be paired beforehand. In addition, MV and RV to be specified must be registered in the volume list (created by iSMvollist) beforehand.
  • Page 160 Chapter 4 Functions of ReplicationControl Specifying the Copy Control state (-cpmode) You can specify the Copy Control state in Restore Execution and the Synchronous state. Synchronous Copy (-cpmode sync) Changes the Copy Control state to the Synchronous Copy mode. Semi-synchronous Copy (-cpmode semi) Changes the Copy Control state to the Semi-synchronous Copy mode.
  • Page 161 Chapter 4 Functions of ReplicationControl RV protection specified (-mode protect) Performs Restore without reflecting the updated data of the MV into the RV. When Restore is completed and the Synchronous State is placed, Separate is automatically executed and then the state changes to Separated State.
  • Page 162 Chapter 4 Functions of ReplicationControl Description The execution message and the end message appear only when -wait has been specified to wait for the Synchronous State (rst/sync). If you do not want the execution message to appear, change the RPL_WAITMSG setting in the replication operation option setting file.
  • Page 163 Chapter 4 Functions of ReplicationControl [Execution Conditions] To perform Restore, the following conditions must be satisfied. The target MV and RV are paired. (ii) The target MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated. (iv) Both MV and RV are unmounted from the system.
  • Page 164 Chapter 4 Functions of ReplicationControl Figure 4-28 illustrates the execution conditions of Restore. Pair setting (ii) MV or RV has been registered in the volume (ix) Separated Target Pair list. (iii) The volume list is not being created or updated. (iv) Both MV and RV have been unmounted.

  • Page 165: Copy Control State Change Command

    Chapter 4 Functions of ReplicationControl For changing the Copy Control state, the iSMrc_change command is used. You can use option specification of the iSMrc_change command to perform the Copy Control state change in the Replicate or Restore state. Before the Copy Control state is changed, MV and RV to be specified must be paired beforehand. In addition, MV and RV to be specified must be registered in the volume list (created by iSMvollist).
  • Page 166 Chapter 4 Functions of ReplicationControl Table 4-5 Relations of Copy Control State Change Option sync semi suspend resume (synchro- (semi- (background) (suspend) (resume) nization) synchronization) State before Change × × ∆ sync (synchronization) × × ∆ semi (semi-synchronization) ∆ bg (background) ∆...
  • Page 167 Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Change Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [End message] Change Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) special_file_name: Special file name ld_name:...
  • Page 168 Chapter 4 Functions of ReplicationControl Figure 4-29 illustrates the execution conditions of operations regarding the Copy Control state. Pair setting (ii) MV or RV has been registered in the volume list. Target Pair (iii) The volume list is not being created or updated (iv) Disk array is not in the Freeze state.

  • Page 169: Wait Command

    Chapter 4 Functions of ReplicationControl Use the iSMrc_wait command to wait for Synchronous State (rpl/sync), Synchronous State (rst/sync), or Separated State. A pair of MV and RV must be specified as the target volumes beforehand. The MV and RV to be specified must be registered in the Volume List (created by the iSMvollist).
  • Page 170 Chapter 4 Functions of ReplicationControl replication operation option setting file. On the UNIX system, the default value can be specified by using the RPL_WATCHDEV environment variable. For details of each setting, refer to the “Data Replication Command Reference”. Paired-volume state monitoring time limit (-limit) You can specify a time limit for stopping the monitoring of the paired-volume state.
  • Page 171 Chapter 4 Functions of ReplicationControl activity_state: Activity State of the paired volumes for which the wait command is completed Replicate: Synchronous State (rpl/sync) Restore: Synchronous State (rst/sync) Separate: Separated (including the Separated state accompanied by completion of Restore(protect)) YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number: Physical disk number ld_name:...
  • Page 172 Chapter 4 Functions of ReplicationControl [Execution Conditions] To execute the wait command, the following conditions must be satisfied: The target MV and RV are paired. (ii) The target MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated. (iv) The disk array where the specified MV and RV are stored is not in the Freeze state.

  • Page 173: Replication State Display Command

    Chapter 4 Functions of ReplicationControl To display the replication state, the iSMrc_query command is used. As the target volume, MV and RV to be specified must be paired beforehand. In addition, MV and RV to be specified must be registered in the volume list (created by iSMvollist). [Main Options] The iSMrc_query command enables the specification of the following options: Specifying paired volumes...
  • Page 174 Chapter 4 Functions of ReplicationControl Synchronous State sync Copy Control State copy <state> Start Time YYYY/MM/DD hh:mm:ss <state> End Time YYYY/MM/DD hh:mm:ss Separate Diff separate_diffsize Copy Diff copy_diffsize RV Access rvacc Previous Active prev_state Description disk_number: Physical disk number ld_name: Logical disk name type: OS type...
  • Page 175 Chapter 4 Functions of ReplicationControl Previous Active prev_state Description special_file_name: Special file name ld_name: Logical disk name type: OS type activity: Activity State sync: Paired operation state copy: Copy Control State <state> Start Time: Operation start time (<state> varies) <state> End Time: Operation end time (<state>...
  • Page 176 Chapter 4 Functions of ReplicationControl Pair setting Target Pair (ii) MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated (iv) The disk is not a dynamic disk or GPT-formatted partition disk.

  • Page 177: Specific Volume Name Display Command

    Chapter 4 Functions of ReplicationControl To carry out a specific volume name display, the iSMrc_sense command is used. The volume to be specified must be registered in the volume list (created by iSMvollist). [Main Options] The iSMrc_sense command enables the specification of the following options: Specifying volumes Specify the target volume.
  • Page 178 Chapter 4 Functions of ReplicationControl attribute: Logical disk attribute for the data replication and snapshot functions Displays only when the -attr option is specified. link_status: Link state of the link-volume Displays only when the -attr option is specified. When the target volume is not a link-volume, “-”...
  • Page 179 Chapter 4 Functions of ReplicationControl Figure 4-32 shows execution conditions for displaying a specific volume name. Target The target volume or the volume paired with the target volume has been registered in the volume list. (ii) The volume list is not being created or updated (iii) The disk is not a dynamic disk or GPT-formatted partition disk.

  • Page 180: Pair Setting And Unpair Operations

    Chapter 4 Functions of ReplicationControl Pair operation commands make functions available for listing logical disks, pair setting and unpairing. Pair operation enables data replication that changes or switches RVs dynamically. To perform logical disk information display, the iSMrc_ldlist command is used. The iSMrc_ldlist command targets disk arrays that are recognized by the system and obtains and displays logical disks and associated information.
  • Page 181 Chapter 4 Functions of ReplicationControl [Displayed Information] When the -a option or the -de option is specified: Logical disk information as shown below is listed. Receiving... --------------------------------------------------------------------------------------------------------------- [Disk Array Name](Management) OS Type LD Name Attribute Capacity --------------------------------------------------------------------------------------------------------------- [disk_array_name](management) type ld_name attribute capacity Description...
  • Page 182 Chapter 4 Functions of ReplicationControl Description Receiving... Message indicating that data is being received. During a joint operation with replication management, this message is displayed until data has been received. While data is being received, the “.” character is updated. disk_array_name Disk array name management...

  • Page 183: Pair/Unpair Command

    Chapter 4 Functions of ReplicationControl To execute pair setting or unpair, the iSMrc_pair command is used. The iSMrc_pair command sets and unpairs specified paired MV and RV. If a failure occurred on the MV side or RV side disk array and the regular unpairing becomes impossible, Forced Unpair can be performed.
  • Page 184 Chapter 4 Functions of ReplicationControl Forced Unpair (-force) If the regular unpairing becomes impossible due to a failure occurred in the connections between disk arrays and the like, it is possible to perform Forced unpair for MV and RV individually by specifying the -force option.
  • Page 185 Chapter 4 Functions of ReplicationControl (xi) The volume list is not being created or updated. (xii) Specifying a volume of a dynamic disk or a GPT-format partition disk is not allowed (Windows only). (xiii) The iSM dedicated special file is not being created (HP-UX version UNIX only). The above execution conditions (ii), (xi), (xii), and (xiii) are not applicable when conducting a joint operation with the iSM (replication management).

  • Page 186: Disk Array Operations

    Chapter 4 Functions of ReplicationControl The disk array operation command provides the function of displaying information on the replication function of a disk array. To display information on the replication function of a disk array, use the iSMrc_arrayinfo command. The iSMrc_arrayinfo command obtains and displays information related to the replication function of the disk array recognized by the system.
  • Page 187 Chapter 4 Functions of ReplicationControl [Displayed Information] When the -dinfo option is specified Information on the replication function of a disk array is displayed as shown below. Disk Array Name disk_array_name Differential Map diff_map Replication Status replication_status Back Ground Copy Level bgcopy_level Max Number of RV Setting rv_setting...
  • Page 188 Chapter 4 Functions of ReplicationControl Description disk_array_name: Name of the disk array to link to link_number: Link number Number of a disk array to link to (link number), beginning with 0 path_number: Path number Connection number for each of disk arrays to link to, beginning with 0 path_state: Path status Indicates the connection status for each path indicated by the path...

  • Page 189: Disk Operations

    Chapter 4 Functions of ReplicationControl The disk operation function, which functions only on the Windows system, enables disks to be controlled and operated so as to operate the data replication and snapshot functions on the Windows system. Disk operation commands provide functions necessary for Windows disk operation linking with the replication operation commands or snapshot operation commands rather than a function that replaces Windows “Disk Management”.
  • Page 190 Chapter 4 Functions of ReplicationControl Description YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number: Physical disk number ld_name: Logical disk name type: OS type volume_name: Mount point volume name path: Drive letter or path name mounted on the NTFS volume folder accessed by users [Execution Conditions] To perform Flush, the following conditions must be satisfied.

  • Page 191: Volume Mount Command

    Chapter 4 Functions of ReplicationControl To carry out a volume mount, the iSMrc_mount command is used. The iSMrc_mount command associates volumes (partitions) and file systems. Mounting allows volumes to be used as file systems (local disks such as C: and D:) on the Windows system. When the iSMrc_umount command unmounts a volume that is set in the Not Ready state, release the Not Ready state and mount the volume.
  • Page 192 Chapter 4 Functions of ReplicationControl volume_name: Mount point volume name path Drive letter or path name mounted on the NTFS volume folder accessed by users iSM13220: Setting drive letter (drive:) (volume_name) has succeeded. Message output when a drive letter or an NTFS folder name is set [Execution Conditions] To perform Mount, the following conditions must be satisfied.

  • Page 193: Volume Unmount Command

    Chapter 4 Functions of ReplicationControl To unmount a volume, the iSMrc_umount command is used. The iSMrc_umount command cancels the association of volumes (partitions) with file systems. Unmounting a volume flushes the file system buffer of the specified volume thoroughly. When access is made to the file system of the unmounted volume, the Windows system mounts the volume automatically.
  • Page 194 Chapter 4 Functions of ReplicationControl [End message] Umount Normal End YYYY/MM/DD hh:mm:ss disk_number ld_name type volume_name path Description iSM13221: Resetting drive letter (drive:) (volume_name) has succeeded. Message output when a drive letter or an NTFS folder name is deleted automatically YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number:...

  • Page 195: Disk Signature Operation Command

    Chapter 4 Functions of ReplicationControl For the disk signature operations, the iSMrc_signature command is used. A disk signature is system information used for identifying the disk on the Windows system. On the Windows system, two disks with the same signature cannot be used in the same system. For example, Data replication automatically avoids the same disk signature when MV and RV are synchronized.
  • Page 196 Chapter 4 Functions of ReplicationControl [Displayed Information] The following information is displayed in the signature information list of the iSMrc_signature command. [Displayed information] Disk Disk Saved LV Link Disk Array Name No. LDN Signature Signature Signature Attribute Status -- - - -- - - -- - -- - - -- - -- - - - - -- - - - -- - -- -...

  • Page 197: Devices Scan Command

    Chapter 4 Functions of ReplicationControl To scan devices, the iSMrc_scan command is used. Executing the iSMrc_scan command scans devices and lets the system recognize available devices. When the system is starting up with the devices not connected to the system or in “Not Ready” state, the system cannot recognize those devices.

  • Page 198: Index

    Index disk array ..............33 disk array icon ............. 29 disk array information display ......104, 106 disk array link information screen ....... 36 disk array operation command........178 abnormal suspend ............21 disk array operations..........178 activity state ............16, 32 disk array properties ............
  • Page 199 I/O issuing path ............108 operation authorization ..........24 interval to obtain disk array information ..... 95 operation message ............24 iSMrc_arrayinfo ............106 operation types ............105 iSMrc_change..........104, 106, 157 operations linked with iSM........109 iSMrc_flush ..........104, 106, 181 iSMrc_ldlist ..........
  • Page 200 Restore State..............15 sync state ........... 13, 15, 16, 33 resume copy............63, 64 synchronous copy mode ..........17 RO ................20 rRV................8 RV ................. 1 RV access restriction ..........20, 71 RV mode ..............34 target ID ..............113 RV mode change ............

This manual is also suitable for:

Storage manager ver3.3

Table of Contents