The requirement for a 1GB boot device is here:
"Installing ESXi 5.1 requires a boot device that is a minimum of 1GB in size."
I wasn't aware that this was also a requirement for 5.0 which is why I was trying to validate my current build (which had progressed from 4.0 to 4.1 to 5.0 and hopefully now 5.1).
So its probably OK ...
I tried logging in via PuTTY and ran "du -sh /boot" and various combinations including /bootbank and so on, but didn't seem to give me what I wanted.
Maybe booting the server using a 'gparted' live CD or similar tool might be the only way to get this info?
