Creating temporary storage on the secondary site using the DR wizard (array-based replication)
To enable you to install applications, the DR wizard can create a temporary disk group, DR_APP_INSTALL_DG, which contains the volumes and mount points for use in application installation. The temporary configuration uses 500 MB volumes or the volume size at the primary site, depending on which is smaller. The wizard deletes the temporary configuration after application installation.
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The DR wizard cannot be used if you are setting up DR in a non-shared storage environment. |
If you have already installed the application on all nodes, you can skip this storage cloning step by unchecking the Perform storage cloning check box on the Storage Cloning panel.
If you are starting the wizard for the first time, refer to the following topic before continuing with the storage cloning procedure:
See About configuring disaster recovery with the DR wizard.
To create temporary storage for application installation (array-based replication)
- If you have not yet done so, start the Disaster Recovery Configuration Wizard and specify the information for the primary site system, the service group, and the secondary site system.
- In the Replication Options panel, select the array-based replication method you plan to use and click :
- If you selected Hitachi TrueCopy replication, the Hitachi TrueCopy File Paths panel is displayed. The wizard populates the fields if it locates the files in the default location. Otherwise, fill in the file path information for both the primary and secondary sites as follows:
- In the Storage Cloning panel, you can choose whether or not to perform storage cloning, which creates a temporary storage disk group and volumes for application installation. The wizard will delete the temporary storage once you confirm application installation is complete.
Choose one of the following:
If you have not yet installed the application on all nodes, leave checked and click . Continue with the next step in this procedure.
If you have already installed the application on all nodes, uncheck and click . Continue with the procedure for service group cloning.
- The Storage Validation Results panel shows the temporary storage configuration that the wizard will configure at the secondary site. You can click to toggle to a summary view and toggle back to a detailed view by clicking .
The detailed view shows the following:
The summary view shows the following:
If the panel displays a message indicating that the available disks on the secondary are inadequate, you can free some disks on the secondary or add more storage. Then, click so that the wizard can update its information about the secondary storage configuration. Click .
- In the Disk Selection for Storage Cloning panel, a default disk selection is shown for the temporary storage at the secondary site. You can change the selection by moving disks to and from the Available Disks and Selected Disks pane. Under the Available Disks label, a drop-down list allows you to filter available disks by disk enclosure name. The default is All, which displays all free disks available on all enclosures. Click .
- The Volume Layout for Secondary Site Storage panel shows a default volume layout for the temporary storage based on the primary site volume layout. Optionally, you can change the default disk assignment and layout for any volume:
Click .
- In the Storage Configuration Cloning Summary panel, review the displayed information. If you want to change any selection, click . Otherwise, click to allow the wizard to implement the temporary storage configuration at the secondary site.
- In the Implementation panel, wait until the status for all the completed tasks is marked with a check symbol, indicating successful completion. Wait until the wizard completes cloning the storage. The progress bar indicates the status of the tasks. If some task could not be completed successfully, then the task is marked with an () symbol. The Information column displays details about the reasons for task failure.
Click .
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If SCSI-3 support is enabled for using Persistent Group Reservations (PGR), and if one of the selected disks is not SCSI-3 compliant, the following error is displayed: "Unable to reserve a majority of dynamic disk group members. Failed to start SCSI reservation thread."
Recommended action: Click to exit the wizard. Either replace the non-compliant disk with a SCSI-3 compliant disk, or enable SCSI-2 support, and then run the wizard again.
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- In the Storage Configuration Cloning Result screen, view the results and click .
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In the Application Installation panel, review the information and do one of the following:
For applications that require installing components on shared storage, before you begin installation, ensure that your disk groups are imported and volumes are mounted. If volumes were mounted as drive paths (folder mount) on the primary site, the wizard does not mount the volumes on the secondary site. You must manually format the volumes and assign the drive path to the volumes using Veritas Enterprise Administrator. Use the same letters and folder names that were assigned on the primary site.
If you keep the wizard running during installation, once application installation is complete, click to proceed with service group cloning. Otherwise, restart the DR wizard and continue through the wizard from the Welcome panel.
Once the application is installed, the temporary cloned storage is no longer needed. Before beginning service group cloning, the wizard displays the Temporary Storage Deletion panel to confirm the deletion of the temporary storage.