A common question which gets asked allot is; Should I upgrade my ESXi hosts or do a fresh install ?
Most people when asked that question would be inclined to say “Fresh Install” when challenged some of the excuses I hear are ” It will carry over a load of crap from the previous release”. This seems to be a mindset we have gotten ourselves in from managing other vendor OS’s (not pointing the finger).
In fact if we were to look at the process in a bit more detail, an upgraded ESXi host is almost identical to a freshly installed ESXi host as..
- Boot disk is not repartitioned
- Overwrites boot bank contents
- Configuration and VMFS volume preserved
Upgrade Process Walkthrough
Step 1: Save the config (state.tgz)
Step 2: Replace VIBs (overwrite)
Step 3: Reboot
Step 4: Config re-applied on reboot
Note. The partition layout is the same now for 6 as it was for 5.x
Don’t be afraid to upgrade!