There are several differences between CD-R and CD-RW discs. CD-Rs are recordable discs that use a cyanine dye to create a permanent record on the disc. CD-RWs are rewritable discs that use a different dye that can be erased and rewritten multiple times.

Another difference is that CD-Rs use pits to store data, while CD-RW discs use lands and pits. The pits are small indentations on the surface of the disc that represent binary data, while the lands are the raised portions between the pits. This difference is what allows CD-Rs to be read only once, since the pits are …