The other day I burnt a copy of a CentOS 6.4 64 bit netinstall disc, verified the disc which passed & about a third of the way through the install it informed me that there was no CD in the drive & refused to carry on.
So I burnt another & the same thing happened. So using the same disk burner & the same batch of disks, I burnt a copy of a Debian 7.1
netinstall & it installed perfectly.
Any thoughts gladly welcome (the CentOS disc was downloaded from the CentOS repos).