Many tools, architectures, and technologies are available for you to use to implement a disaster recovery strategy. For example, you can use disaster recovery manager (DRM) to vault of offsite volumes, generate a disaster recovery plan, and automate the recovery of the Tivoli® Storage Manager server. To maintain the same level of files on two networked servers, you can use Tivoli Storage Manager node replication.
Each tier corresponds to different recovery times and potentials for data loss. For example, in a tier 1 production site data is typically saved only selectively, and volumes that are stored at an offsite facility can be difficult to track. In addition, recovery time is unpredictable. After a disaster, hardware and software must be restored, and storage volumes must be sent back to the production site.
A tier 6 strategy consists of synchronous remote-copy technologies between peer production sites. Sites with tier 6 protection offer fast recovery times with no loss of data. Data is considered lost only if a transaction started, for example if the user presses Enter, but the transaction request was not completed at both sites.