Dell Storage Manager 2020 R1 Administrator's Guide

Activate Disaster Recovery for Multiple Restore Points

If a pair of Storage Centers host multiple replications and/or Live Volumes, disaster recovery can be activated for all of the corresponding restore points simultaneously.

1. Click the Replications & Live Volumes view.
2. Click the Restore Points tab, then click Activate Disaster Recovery. The Activate Disaster Recovery wizard appears.
3. Select the source/destination Storage Center pair for which you want to activate DR, then click Next. The wizard advances to the next page.
4. Choose whether you want to allow planned DR activation.
   1. (Optional, replication only) To allow DR to be activated while the replication is functioning normally, select the Allow Planned Activate Disaster Recoveries check box.
   2. Click Next. The wizard advances to the next page.
5. In the Available Restore Points pane, select the restore points that you want to activate, then click Next. The wizard advances to the next page.
6. Configure DR settings for each restore point.
   1. Select the restore point that you want to modify, then click Edit Settings. The Activate Disaster Recovery dialog box appears.

      If the restore point corresponds to a synchronous replication, the dialog box displays additional information about the state of the replication:

      • The Sync Data Status field displays the synchronization status for the replication at the time the restore point was validated.
      • A recommendation about whether the destination volume is currently synchronized with the source volume is displayed below the Sync Data Status field in green or yellow text.

      NOTE:For high consistency mode synchronous replications that are current, the Use Active Snapshot check box is automatically selected.

      

   2. (Live Volume, Storage Center 6.5 and later only) Select the Preserve Live Volume check box to direct IO requests to the secondary volume without deleting the Live Volume. If the Live Volume manages a replication, Preserve Live Volume must be selected to preserve the managed replication later in the restore process.
      • If Preserve Live Volume is selected, Storage Center directs IO requests to the secondary volume by promoting it to primary. The Live Volume is not deleted and may be repaired when the original primary Storage Center comes back online. Volume identity is preserved so that administrator intervention is not required on the servers mapped to the volume. If a replication is managed by the Live Volume, it moves to follow the newly promoted primary volume. Fewer volume settings are available because the existing Live Volume settings are used.
      • If Preserve Live Volume is not selected, Dell Storage Manager deletes the Live Volume, creates a view volume, and maps it to a server. During the restore process, the Live Volume is recreated. If a replication is managed by the Live Volume, the managed replication is removed later during the restore process.
   3. Select a server to map the recovery volume to by clicking Change next to the Server label.
      • A server is required for each restore point.
      • Click Advanced Mapping to configure LUN settings, restrict mapping paths, or present the volume as read-only.
      • This option is not available if the Preserve Live Volume check box is selected.
   4. Choose which snapshot will be used for the activated volume.
      • If Preserve Live Volume is not available or not selected, use the current state of the volume by selecting Use Active Snapshot, or select a frozen snapshot by clicking Change next to Snapshot. By default, the last frozen snapshot is used.
      • If Preserve Live Volume is selected, the last frozen snapshot is used unless Use Active Snapshot is selected.
   5. (Optional) If Preserve Live Volume is not available or not selected, click Change next to Snapshot Profile List to specify which snapshot profiles will be associated with the activated volume.
   6. Click OK.
7. Click Finish.
   • Dell Storage Manager activates the recovery volumes.
   • Use the Recovery Progress tab to monitor DR activation