On Sat, Sep 17, 2011 at 11:57 PM, Always Learning <centos at u61.u22.net> wrote: > > On Sat, 2011-09-17 at 16:50 +0100, Keith Roberts wrote: > >> Faulty burn media? > > I use a lot to record television news, among my many other activities, > and estimate about 4% to 5% of DVDs are bad. Bad media is one high possibility. If you have any other 64bit OS, i.e. Windows (yuk), Ubuntu, etc. Try them. If they boot, then your Centos media is faulty.