Have came across many zenoss users asking about changing the default thresholds for filesystem, disk utilisation. In many cases, the issue is about the fact that the default template calculates percentage utilisation and and a threshold like (95%) may not be appropriate for large (hundreds of terabytes) filesystems.
There are a couple of things that can be done.
1. Modify the default template
2. Use a transform in /Events/Perf/Filesystem that calculate actual figures, then decide the fate of events based on these figures (you can obtain such a transform here)
If the first approach above sounds good, I may be able to upload a zenpack which adds a second graph on the template, and also contains a modified copy of FileSystem.py
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