well....as long as the used datfile holds all in one set defintion (so you got a trillion isos in just 1 set), you won't succeed in testing.
You need to either:
- buy a bigger hd
- or split up the datfile...which is pretty easy. Load the datfile in a texteditor and decide where you want to split it. Generate a second set instance which holds the files from your 2nd hd), save this datfile and load it in the profiler.
This solution of course has a downside....since you need to know which parts are on the first and which are on the second disk...
...or you change the dat completely to 1 iso per set...then you don't need to care which file is on which disk, but you have to follow the storing methology which is always:
rompath\setname\file 1...file n for decompressed sets
rompath\setname.zip (.rar/.7z) for compressed sets where the archive holds file 1 ... file n
always keep in mind, usually a set contains more files, like a pacman arcade dump which is a collection of various IC rom dumps (sound, grafics, code,...
So in the last case you'd need to store isos separately in subfolders....