Are you saying the controller port is set as tagged?
Yes, both the voice and data VLAN's are tagged on the controller and switch port, there is no "native" untagged VLAN.
I'm sure I have upgraded an MXe from MCD 6.0 direct to MCD 8.0.
Are you sure the help files are not referring to Release 7 not MCD 7.0?
I'm sure you can upgrade from MCD 4.0(GDM Mode) to MCD 8.0 no problem, anything before needs to be upgrade to MCD 4.0 first and converted to GDM mode.
I'm wondering if it failed for another reason.
That copy and pastte was direct from the hold of the Software Installer. I have upgraded lots of servers from 4.X to 7 and 8 without issue, but in the Installer tool there are two options, either Online/Offline Upgrade or Full Install, both of which do an upgrade in the end.
My concern is the VLAN's are messing things up, yet when I tried to upgrade before and it failed, it software installer recovered it from failure (although it took like 2 hours). I am just wondering if my issue is the VLANs or the install method.