Is there a way to get a history of dedupe on a volume?
check the sis logs... any specific information you are looking for, in the dedup history ???
Not 100% sure what you are after, but you can check df -s outputs from different weeks via My AutoSupport portal (providing the filer in question is set to send ASUPs)
Thanks, i will give that a try. I also came across OnCommand Report and after reading this it looks like it can parse thru DFM's performance metrixcs have you used or seen this before?
I haven't used OnCommand Report, so don't really know what it can & cannot do.