I ordered a caddy that replaces my cdrom-drive and allows me to add a second hard disk to my laptop a few weeks ago. Then I bought a 500gb hdd and put everything in my laptop. The cool thing is that I now have a raid. The caddy looks like this:
I am getting about 120mb/s reading speed with my brand new raid. Some applications start notably faster now, however, I don’t really feel the software is faster when already running. After all it is just about huge guts.