Hes joking
RW means you can burn onto a CD and a DVD, and if the blank discs are also CD-RW or DVD-RW discs, you can erase the disc and write on the disc again
if it says"compact disc rewritable" it can only burn cd's.

it it says dvd-rw, it can burn both dvd's and cd's
Quote by DanielQ
I thought rw meant read/write.

You can tell if you try to burn it and it works.

Umm...read that again. RW means read/write.... as in it can read, AND write discs.