Copy CD to disk + copy disk to CD + reuse

[Hugo Vanwoerkom <hvw59601@care2.com>]

Hi,

I have only 10 CD-RW disks that I use for mondoarchive.

But I wanted to try Grml-0.7 on one of them. So I needed to save the 
contents of one of them and use that.

So I found this site:
http://www.yolinux.com/TUTORIALS/LinuxTutorialCDBurn.html

So I did:
   1.  mount /cdrom
   2. mkisofs -r -o 11.iso /cdrom

Then I copied the Grml-0.7 iso to that CD-RW, tried Grml, and copied the 
mondo iso back on to it:

cdrecord -v blank=fast speed=4 dev=ATA:1,1,0 11.iso


Guess what? That CD-RW does not boot.

What's wrong with the scheme?

Thanks!

H