On Nov 19, 2013, at 2:07 PM, Glenn Eychaner <geychaner at mac.com> wrote: > Possibly a hardware incompatibility? (I haven't been able to test a LiveCD in > the optical drive yet, but will do so now.) The system boots a liveCD from the DVD drive just fine. It boots CentOS 6.4 from the hard disk. It boots everything BUT CentOS 6.4 LiveCD from the USB key. -G. -- Glenn Eychaner (geychaner at lco.cl) Telescope Systems Programmer, Las Campanas Observatory