Either #Debian has forgotten how to write a boot record, or #Nutanix is eating them.
Either way, this machine was installed from a minimal .iso, booted from disk1, logged into, software installed (vim, curl), and on reboot apparently now has no boot records on any of it's disks.
A rising tide raises all boats - if you're going to punish #redhat, make sure you punish all #Linux companies if you can't easily build their entire code tree yourself