Recovering with and without the fast reverse restore feature

The fast reverse restore feature, when used with Global Mirror functions, allows a FlashCopy relationship to be reversed without waiting for the background copy of the original FlashCopy to complete.

You can reverse a FlashCopy relationship in which change recording is enabled and restore the tracks from the target to the source volume. However, the background copy process of the original FlashCopy must complete before you can reverse the order of the FlashCopy relationship to its original source and target relationship.

With the fast reverse restore feature, you can reverse a FlashCopy relationship in which change recording is enabled without waiting for the background copy of the original FlashCopy to complete. The fast reverse restore feature is not required during disaster recovery operations; however, a longer recovery time can result without it.