Minor panic over and I'm able to breathe again.
I have a few continual scans set up in Spiceworks monitoring switches / servers / VM / Printers etc. This is a recent addition as I wanted to get the full network discovery above 95% otherwise didn't see the point in querying half a job :)
The issue is Spiceworks is now emailing me notifications about devices being offline longer than 10 minutes( as I've asked it) but it giving me false readings, namely for my Hyper-V 2012 Core hosts. They are on as my entire environment, 20 VM's, sits on these 2 Hosts over a SAN and iSCSI switch.
Is there a better way to get an up/down reading on Hyper-V core hosts?
cheers.