And the writer supports single/dual layer discs, either 12cm or 8cm. As for writing, the unit can handle DVDs up to 8x and CDs up to 24x. Most unique about the Samsung SE-S084B, however, is its Buffer Under Run technology, which prevents Buffer Under Run errors from occurring during high-speed writing. Right behind this technology is OPC technology; it optimizes the laser power on each area of the disc, ensuring even content writing.