sl
you are thinking of dvd-ram
CD-r and CD-rw are both effectively just soft pieces of plastic ... the burner just heats the surface of the reflective "data layer" burning pits into the plastic.
the reader then bounces a beam onto the reflective layer ... and uses the refracted wobbles as 1s and 0s.
any notional "format" is done on the fly.
the difference between -r and -rw is that -rw can be reset .... so re-heating allows the surface to flatten out.
a cheapo drive conforms to lots and lots of different standards Supports DVD+/-R, DVD+/-RW, DVD+/- RL, DVD+/-RW DL, DVD RAM and CD-R, CD-RW to name a few -
just to add another to mad steves list
unless proved wrong ... I'd suspect a duff batch of discs
it could be the software ... see if you can update to the latest version ... uninstall/reinstall.