I upgraded an ESXi host from 5.1 to 5.5u2 using the command line and downloading the image from vmware's deployment site. It completes the update fine, but when I reboot, it gets to the point where the screen reads: vfat loaded and then hangs until I hard reset. It reverts to the previous image and boots back to 5.1.
I have checked the logs in /var/log and there is nothing that I can find to explain this.
Any suggestions on where else to look for some clues as to why it failed to boot so I can troubleshoot?