Trouble with loading Knoppix into RAM.

As the title says, I'm having trouble with loading Knoppix into ram via the knoppix toram command. The copy to the ram goes fine until about 50% at which point the transfer goes from 5MBps+ to less than 50kbps. It speeds up again around 60%, and when it gets to 100%, I get an error of eight files and it starts over. When it reaches 100% the second time, I get an error that says that it could not be copied, ramdisk possibly has not enough space left. I have 1GB of ram, so I don't think its a problem with not enough memory. Despite these errors, Knoppix manages to load.

When I try to take out the Knoppix CD inside the OS, it gives me an error that says, verbatim;

Quote:

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Unfortunately, the device system:/media/hda (/dev/hda) named 'KNOPPIX' and currently mounted at /cdrom could not be unmounted. The following error was returned by unmount command:

unmount: /cdrom is not in the fstab (and you are not root)

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Since I only have this single DVD burner, I would like to load the OS into the memory so I can burn DVDs for file backups.