Thanks for the link to the video, that is awesome! I have created an email template essentially matching what you (I believe it was you) set up in the video, assigned it to some uninformative alerts I've been receiving, and now will wait to see if I get that info. Unfortunately I haven't received any more disk alerts (or is that fortunate?) - I never took any action to correct them and never identified what agent nodes correlated to those alerts and so now I'll have to wait for it to happen again. But, I applied this new template to other alerts I've been getting that were using the original Default template and also didn't tell me from where they originated and so hopefully this will address those as well.
Thanks again for taking the time to reply and also for creating/sharing that video. Very informative!!