Implementation Guide › Installing a Disaster Recovery Deployment › The Disaster Recovery Process › When to Restore a DH

When to Restore a DH

When you restore a DH, dmsmgr copies data from the DMS backup files to the DH Reader directory. The following scenarios describe when to restore a DH:

• When a catastrophic production system failure has occurred.
• When the DH database is corrupt.
• When the DH is out of sync with its DMS.
• When you need to set up a new DH on a different host.

Note: You do not need to restore the DH Writer because it has a transient database. Check that the DH Writer is present in the existing DH file structure before you restore a DH.