So I think what I'm understanding is that I can't move these while they're on (despite one working for an unknown reason)? One of the two is our file server, which is very critical and also large, so it will take a fair amount of downtime to move it cold. This is what I was hoping to avoid, but it sounds like there isn't an alternative.
I'm trying to get rid of the old host, so I'm not worried about anything being able to work on it again - I just need them off of there. And was very much hoping to not have to shut them down to do it.
Or - just re-reading...are you saying I'd have to shut down VM-B because I'd need to shut down *anything* running on the newer instruction set to do the EVC settings? Also not an easy option, since there are a number of other VMs running on that host (and the third host in the cluster, which has not been involved in any of this moving stuff).
To confirm then, it looks like the options are either 1. shut down the two I need to move and move them cold, or 2. shut down every other machine in the entire cluster to change the EVC settings. Is that correct?