How can I use CD drive in my system?

Hi Friends
I have three types of server, every server has CD drive but I do not know is it Readable or Rewritable?
How can I know if that drive is Readable or Rewritable?
If the answer is Rewritable, How can I Write on CD because I want to make dump for my Servers.

I write down here server specifications:
adspje[spsy]> version
Machine hardware: sun4u
OS version: 5.6
Processor type: sparc
Hardware: SUNW,Ultra-1

app2je[spsy]> version
Machine hardware: sun4u
OS version: 5.6
Processor type: sparc
Hardware: SUNW,Ultra-2

rtc2je[spsy]> version
Machine hardware: sun4u
OS version: 5.6
Processor type: sparc
Hardware: SUNW,Ultra-Enterprise