The ultimate way should be to have layer 1 to read from disc 1, layer 2 from disc2, layer 3 also from another disc etc.etc

The when you hit layer 5 you access disc number 1, layer 6 from disc 2, etc
The you will have max 2 files going on one disc.

The discs are getting bigger and bigger, but (as always, Richard is right)
they are to slow to handle multiply files on a disc , and thats often the setup with a Catalyst system.In this case I get good results (as I don´t want to use DV codec) with multiply FW800 discs and a extra FW card....

But it is tricky to place all the files to be handled correct since everyone wants to "create on the fly", but that´s how I use to handle a system that I know need to NOT play any files under 25fps whatever.....