Introducing Arcserve Backup Agents and Options › Using Options › Disaster Recovery Option › Recovering NEC Clusters › Disaster Recovery on NEC CLUSTERPRO/ExpressCluster SE › Arcserve Backup Installed on the NEC CLUSTERPRO/ExpressCluster SE Cluster › Shared Disk Failure on NEC CLUSTERPRO/ExpressCluster SE › Recover Data with Arcserve Backup Not Installed on NEC CLUSTERPRO/ExpressCluster SE Shared Disks

Recover Data with Arcserve Backup Not Installed on NEC CLUSTERPRO/ExpressCluster SE Shared Disks

If the shared disk fails, but the cluster nodes are undamaged, perform the following steps to recover data residing on the shared disks:

To recover data residing on the shared disks

1. On each cluster node, select Control Panel, Services, and change the Startup Type of the following services to Manual:
   • NEC ExpressCluster Server
   • NEC ExpressCluster Log Collector
2. Shut down the cluster and turn off all servers.
3. Turn off the shared disk and replace the shared disk, if necessary.
4. Turn on the shared disk and set the shared disk parameters.

   If you must reconstruct a RAID configuration or change a LUN configuration, use the setting tool belonging to the shared disk. See the shared disk product documentation for more information.

   To perform any setting or configuration from a cluster node, turn on only one server at a time.

5. On the primary cluster node, perform the following procedure:
   1. Write a signature (identical to the original) to the disk with the operating system’s disk administrator, if one does not already exist.
   2. Recreate the original partitions on the disk. If X-Call settings have been performed to HBA, you must connect the partition using the NEC ExpressCluster Disk Administrator before formatting.
   3. Using the operating system’s disk administrator, specify the original drive letter to the shared disk.
   4. Use Arcserve Backup to restore the backed up data to the shared disk.
   5. If you have performed X-Call settings for a disk, start the NEC ExpressCluster Disk Administrator and specify the recovered shared disk as X-CALLDISK in the X-CALL DISK configuration.

      If you have performed X-Call settings for HBA, these settings are not changed. No action is necessary.

   6. Confirm that the disk access path has been dualized, if applicable. For example, if the NEC dual port utility 2000 Ver.2.0 (UL1214-102) is used, see the product manual for information.
   7. Reboot the server.
   8. Confirm that the drive letter is identical to the one you set in the previous step using the operating system’s disk administrator.
   9. From the NEC ExpressCluster Disk Administrator, ensure that the cluster letter appears on the CLUSTER disk partition. If the cluster letter does not appear, set it to the original letter.
   10. Shut down the cluster node.
6. Perform the following steps on all cluster nodes:
   1. Boot up the cluster node.
   2. Using the operating system disk administrator, specify the original drive letter to the shared disk, if necessary.
   3. Reset the Startup type from Manual to Automatic for the following services:
      • NEC ExpressCluster Server
      • NEC ExpressCluster Log Collector
   4. Shut down the server and shut down the cluster node.

   Start all cluster nodes and perform the Return to Cluster(R) operation from the NEC ExpressCluster Manager to recover all servers to Normal.