hard drive info

I have this old p 120 that has a limit of 8 gig harddrive. I dropped a 20gig drive into the box an the bios set it up as 8 gig. then installed linux on it with no problem. linux sees it as a 20 gig drive an it installs an boots from it fine. But im just wondering if I might run into any problems since the bios only sees it as a 8 gig drive. thanks for the info. I know that linux can overcome some bios limites an this proves it. jack