I am unable to upgrade an ESXi 4.1 installation to 5.1. I boot from the 5.1 setup CD, and the setup program sees my existing installation and datastores. I select the option to upgrade and preserve datastores. Immediately after the upgrade begins, I get the error (snipped):
"Operation failed. vmkfstools failed with the message: create fs deviceName....Creating vfat file system on.....Permission denied. (Have you set the partition type to 0xfb?)."
Full error message in attached screenshot. I really thought 4.1 to 5.1 was going to be a smooth upgrade. Thanks for any help.