HyperSwap® volumes contain a copy on each site, and copying data from one site to the other introduces significant unnecessary data movement. For a FlashCopy consistency group that has one or more maps that copy data from a HyperSwap® volume, the HyperSwap® volume must have an up-to-date copy on the same site as the target volume of the FlashCopy mapping.
Allow the HyperSwap® volume to synchronize fully before you start the FlashCopy mapping. Alternatively, create and use a FlashCopy mapping on the same site as the up-to-date copy of the HyperSwap® volume.