The only discs that a DVD drive is guaranteed to read are DVD discs. Support for CD-ROM, CD-R, and CD-RW may be included, but is by no means guaranteed. SPECTRA-45 was designed to be read by an infrared 780nm laser. DVD uses a visible red 635nm or 650nm laser, which aren’t reflected sufficiently by the organic dye polymers used in SPECTRA-45. Some DVD players come with two lasers so that they can read SPECTRA-45.