Thanks all for your help and info. I think I'm going to raid stripe my two 160GB 5400 RPM drives to build a 320GB "drive" and buy a 300GB 5400 RPM Maxtor Maxline II drive (reputedly very reliable) as a backup. I think it will be easier overall to organize my mp3s if I have just two icons to work with (I had previously used one of my two 160GBs as my iTunes music folder and the other as backup). Plus it will be a new experience for me to raid some drives together. Thanks again, Rick