For several years already the DS8000 series has featured two types of space efficient volumes:
Track space efficient (TSE) volumes
Extent space efficient (ESE) volumes
Track space efficient (TSE) volumes are used as target volumes of a FlashCopy Space Efficient operation and require the definition of a repository from which tracks are gradually allocated.
Extent space efficient (ESE) volumes are the actual thin provisioned volumes that can be used by host applications.The dynamic... [More]