Red Hat Enterprise Linux Advanced Server 3.0 64-Bit Guest Produces Error on Intel VT Host (2263)
This happens because Red Hat Enterprise Linux Advanced Server 3.0 x86-64 and Red Hat Enterprise Linux Advanced Server 3.0 x86-64 Update 1 do not support Intel 64-bit CPUs. See the release notes for Update 2 on the Red Hat Web site at www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/release-notes/as-amd64/RELEASE-NOTES-U2-x86_64-en.html.
Support for Intel EM64T has been added to the Red Hat Enterprise Linux 3 Update 2 x86-64 distribution. Intel processors with this technology are now supported, in addition to the previously supported AMD64 processors.
To avoid this problem, install Red Hat Enterprise Linux Update 2 or later.