cdm 6.50 has been deployed and when using Admin Console to configure it disk latency is not showing up.
Release : UIM 9.2.0, 20.1, and cdm 6.50
Component : UIM - CDM WITH IOSTAT
Disk latency is available when selecting 'disks'
The adapter that is used for this is in the /nimsoft/probes/service/ppm/adapterlib directory.
If for some reason you see this on one hub and not another there may be an issue transferring the file over to the problem hub's ppm directory. The file can be copied from a working hub to a problem hub as a workaround.