FlashCopy enables the creation of a point in time copy of a volume, or a set of data (a subset of a volume) in a DS8000. With FlashCopy, both copies are immediately available for read and write operations. FlashCopy is also known as a point-in-time copy, fast replication, or time-zero copy (t0 copy).
This chapter explains the basic characteristics of FlashCopy when used in either z Systems or Open Systems environments with the DS8000. It includes the following topics: