What TMac was saying is that it was in 9.4, but only for SSDs.
Later releases allow you to use HDD for inactive data reporting (IDR).
There is an offbox option for inactive data using XCP (free at http://xcp.netapp.com/).
With XCP 1.6.1 you can either enable File System Analytics (which will scan the data and report on cold data) or you can run the following command:
xcp scan -match "((now-x.atime) / 3600) > 31*day" "
The downside is that it's file-based rather than block based, so it won't be exactly the same as IDR, but close.