VSAN Part 30 – Difference between Absent & Degraded components

As part of a quick reference proof-of-concept/evaluation guide that I have been working on, it has become very clear that one of the areas that causes the most confusion is what happens when a storage device is either manually removed from a host participating in the Virtual SAN cluster or the device suffers a failure. These are not the same thing from a Virtual SAN perspective. To explain the different behaviour, it is important to understand that Virtual SAN has 2 types of failure states for components: ABSENT and DEGRADED.