Secondary HD install

Hello all. VERY new to Linux and I'm finding the learning cover to be pretty massive. hope you can help me out with what should be a very simple task I'm sure. I built a cpu to use as a "Ghetto" server as it were for media files and back-ups etc. it's linked into my home network which is primarily windows based and has been working very well for about a year now. I ran out of hd space the other day and decided to pick-up a 1tb internal drive to add to the system. I have installed the drive physically and the system acknowledges it's presence but that's about it. When i run a system monitor it still shows my HD at 98% capacity. I did some reading and followed a tutorial on how to mount the drive through terminal etc and now the machine wont boot properly. I'm required to hit control s to avoid that drive in the boot up sequence i guess. any way, as i say, what should have been a dead easy two minute upgrade has turned into a serious pain in the......! . is there a step by step sticky on this for a complete "newbie" such as myself? The one I followed previously was from Ubuntu / Linux support i believe. thanx!

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