Recovering from a failure

During a catastrophic failure, an HCP system can lose all configuration information. In this case, if the system participates in a replication link, you need to restore the link configuration after the system is rebuilt. If the failure did not cause the system to lose the link configuration, you don’t need to restore the link.

Once the link configuration exists on both systems involved in the link:

For an active/active link, you need to perform the failback procedure.

For an active/passive link:

oIf the primary system failed, you need to recover namespace content and other applicable information from the replica.

Note: After you fail over an active/passive link, the only way to return to normal replication is by going through the data recovery procedure. You need to perform this procedure even if you don’t need to restore the link and even if no changes have been made to the configuration or content of the replicated items. Even when nothing has change, the data recovery process can take more than five minutes.

oIf the replica failed, replication automatically restarts, beginning again with the objects with the oldest metadata changes either across all namespaces or within each namespace, depending on the link configuration.

Trademark and LegalDisclaimer

© 2016 Hitachi Data Systems Corporation. All rights reserved.