These topics include reference information for Copy Services.
Valid combinations of FlashCopy and Metro Mirror or Global Mirror functions You can have both the FlashCopy function and either Metro Mirror or Global Mirror operating concurrently on the same volume. However, you must observe the following constraints as to how these functions can be used together.
Thin-provisioned FlashCopy
You can have a mix of thin-provisioned and fully allocated volumes in FlashCopy mappings. One common combination is a fully allocated source with a thin-provisioned target, which enables the target to consume a smaller amount of real storage than the source.
Grains and the FlashCopy bitmap
When data is copied between volumes, it is copied in units of address space that are known as grains.
FlashCopy mapping events
FlashCopy mapping events detail the events that modify the state of a FlashCopy mapping.