Clones can also create copy on writes, if created and activated without pre-copy.  Clones can also force a copy on read from the target device.  Snap will not copy on read from the target device.  Precopy is copy after creation, but before activation.  Background copy happens after activation
Hi All,  What technology does timefinder use?  1. Timefider/Snap  ---> copy on first write 2. Timefinder/Clone ---> copy on access  Is above right?  what's different between background copy and precopy?  Thanks for clarification.  Best Regards, Dennis Dai 
Timfinder question?