Hmm, ok made a mistake while looking at how to set up rpm for SciLab. Set up a mirror site which sets up the Scilab in Yast to load the rpm, but during this I deleted the cd:///;devices=/dev/hdc source. Or somehow did it while working on my system. Now when I try to use Yast to reset up the CD I get the error message:

unable to create source from URL
'cd:///
Details:
Error (media mount failed)

I assume I need to remount the media but I need to know the location that I need to put it.