The current 72 has the async copy on write, we don't have to wait for the read on the first write, unless the system is above 60% WP levels.   Unless you are running 72 code from 2007 or so, you have the feature.
We have a DMX3-24 running MCode version 5772,I know that timefinder snap uses copy-on-write technology,I would like to know if the copy-on-write is synchronous or asynchronous?  I am concerned about performance of our production system ( SAP R/3 using SQL 2005 DB on W2k3 X64 Ent Ed) if I implement timefinder snap on our dev and qa systems.
Does timefinder snap use synchronous copy on write?