What does "Mediacode" stand for?

[TheImmortal]

Hello everyone

My 1st post. Uhm.

In my attempt to backup a Sh*tForce protected game, i saw that i need to burn the backup on a specified mediacode (be it Philips 52X or TDK 52X). What does 'mediacode' mean? Is it simply the brand that makes the CDRs?

Also, the image that has to be backed up is somewhere around 800Mb. How would that fit on my CD?

Please excuse the newbie questions; however, i did not know where to look at after the answers.

Regards.