No you shouldn't have to create an email template, I was just suggesting that you can use the template's "test" function to figure out if you are seeing the correct metrics. Just so I understand though, what health rule/policy/event are you setting it to trigger on? I see you're telling the email digest to trigger in the event that a Health Rule violation starts, upgrades, etc. but what health rule is it pointed to? Maybe that's why it's not reading the event message correctly, it's not sure what event it's supposed to report on. Usually, you build a health rule, then create a policy which triggers that health rule, and then an action you want that policy to do (in this case send you an email). If you're trying to get routine reports however, you might be better served building yourself a dashboard with all the server disk space/volume metrics in it and then setting up a report to email you at whatever frequency you want. Let me know if I'm not understanding the issue, and I'll try to be a bit clearer.
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