That is the problem with the way server farms are now. We also had an issue that the SAN crashed, and we did not get a single page. I feel your pain - but we got kinda lucky - My solution was to build a new server - in my case, I had a Cisco C210 (2x Xeon, 4core cpu, 48 gig ram, 1TB hdd) server that was just decommisioned. Its running vmware 5.5, so i have 1 vm for OrionNPM, and another for my SQL database. This standalone - no SAN connectivity. If the SAN or VM Farm dies, i will get get notified. I use Notepager to actually hit an analog pager/beeper (yes, a bit old school, but its reliable) since Email would depend on the SAN/VM environment. Also works if my internet dies.
As for a software only solution - perhaps you can run the ip monitor tool or something from the toolkit on a desktop that has Notepager or something else to "page" you, but have it monitor the Orion SQL database or somthing? cheaper than my options, but we already had the server inhouse.
Good luck to you.