All necessary repair actions due to a hardware failure are performed concurrently with customer operation.
With the RVA, data availability is also maintained during upgrades. Upgrading disk arrays or cache size can be done concurrently with subsystem operation, without impact or performance degradation.
2.4.2 SnapShot
With SnapShot you can make a copy of your online data to use for different tests while the original data is available to the production system. In the same way, you can use a SnapShot copy to back up volumes to tape or other media while online applications continue to have access to the original data.
2.4.3 PPRC
PPRC provides a synchronous copying capability for protection against loss of access to data in the event of an outage at the primary site. Whenever a disaster occurs at the primary site and the data there is no longer available, you can switch to the secondary site. The switch is nearly without impact to or outage of your operating system, and all data is again available with minimal effort.
Chapter 2. RVA Benefits for VSE/ESA 11
