I should be getting a Seagate Barracuda 160GB SATA harddrive tomorrow, and I just have a few questions. Firstly, should I get rid of my older harddrive, or keep them both in the computer? I imagine it would be useful to have two harddrives (paging file, games, etc come to mind). Another question is, what exactly is RAID? And will I need to use it as a gamer? Also, if you have any other bits of info or tips on SATA harddrives that would be great.

Thanks.