Error while perform migrate & upgrade via ISO

Hi,

We are migrate and upgrade from 10.6.6 to 11.3, using ISO to boot, while entering the setup prompt have this error;

"mount : special device /dev/VolGroup00/root does not exist

cp: cannot stat '/tmp/mnt/etc/fstab': No such file or directory

unmount: /tmp/mnt: not mounted"

If choose to Reinstall, new error;

"Upgrade has been halted due to unrecognized hardware or service configuration"

/etc/fstab file look fine, no typo error.  Any thought on this?