I kinda screwed the pooch yesterday and haphazardly upgraded my lab machine (that has 48GB RAM) from ESXi 4.1 to ESXi 5.1.
The upgrade went fine, but I hadn't picked up on the 32GB RAM limitation in 5.1, and now I can't apply a license and am in 60 day countdown mode.
Is it possible to downgrade the hypervisor back to 4.1 (yes, I realize I will probably have to do clean install) and then run a couple of nested 5.1 hypervisors under 4.1 so that I can still use all my 48GB of RAM?
I've never tried nesting before so need to read up on it first, but thought I would first see if it's worth the hassle.