I am trying to do an upgrade from 8.0 to 8.1 (specifically 22.214.171.124-PL5). This is a four node VM cluster running in VMWare Workstation 12.5.8. I am able to mount the ISO image and load the software no problem, but then when I go to perform the upgrade it ejects the CDROM image and then errors out saying that it cannot access the cdrom media. Never seen this occur during an upgrade. Has anyone else experienced this?