This would seem to only be available for machines running i Cluster Mode.
I have wondered for years why there is such a disconnect between new functionality in ONTap and corresponding monitoring capabilities. I assume that most new functionality gets its internal counters exposed either via XML or SNMP interfaces, but DFM (..., ...) has no way to monitor:
1. vscan performance ...
2. deduplication performance (when it runs, how long it runs, how many GB are scanned)
3. reallocation performance (when it scans and when it actually reallocates)
4. vol autosize ... when it runs and when it is close to maxsize... perhaps even better ways of setting thresholds...
Some of these monitoring activities could lead to more automatization of certain more mundane tasks...