GLYPH<SM590000> FlashCopy licensing is based on the virtual capacity of the source volumes. GLYPH<SM590000> Incremental FlashCopy copies all of the data when you first start FlashCopy, and then only  the changes when you stop and start FlashCopy mapping again. Incremental FlashCopy  can substantially reduce the time that is required to re-create an independent image. GLYPH<SM590000> Reverse FlashCopy enables FlashCopy targets to become restore points for the source  without breaking the FlashCopy relationship, and without having to wait for the original  copy operation to complete. GLYPH<SM590000> The size of the source and target volumes cannot be altered (increased or decreased)  while a FlashCopy mapping is defined.  IBM FlashCopy limitations for IBM Spectrum Virtualize V8.2 are listed in Table 11-8. Property Maximum number FlashCopy mappings per system 5000 FlashCopy targets per source 256 FlashCopy mappings per consistency group 512 FlashCopy consistency groups per system 255 Total FlashCopy volume capacity per I/O group 4096 TiB Table 11-8 FlashCopy limitations in V8.2 11.2 Managing FlashCopy by using the GUI 11.2.1 FlashCopy presets It is often easier to work with the FlashCopy function from the GUI if you have a reasonable  number of host mappings. However, in enterprise data centers with many host mappings, use  the CLI to run your FlashCopy commands. The IBM Spectrum Virtualize GUI interface provides three FlashCopy presets (Snapshot,  Clone, and Backup) to simplify the more common FlashCopy operations. Although these presets meet most FlashCopy requirements, they do not support all possible  FlashCopy options. If more specialized options are required that are not supported by the  presets, the options must be performed by using CLI commands.  This section describes the preset options and their use cases. This preset creates a copy-on-write point-in-time copy. The snapshot is not intended to be an  independent copy. Instead, the copy is used to maintain a view of the production data at the  time that the snapshot is created. Therefore, the snapshot holds only the data from regions of  the production volume that changed since the snapshot was created. Because the snapshot  preset uses thin provisioning, only the capacity that is required for the changes is used. Snapshot uses the following preset parameters: Snapshot GLYPH<SM590000> Incremental:  No GLYPH<SM590000> Background copy:  None GLYPH<SM590000> Delete after completion:  No 466  Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1