Recently, the hard drive on my Dell Inspiron 1100 went out. The hard drive in itself was a 30 GB 4200 rbm, interface: ide, ATA. but what i am really looking into is running windows Xp off of my usb external hard drive. i have already tried, and the computer tells me that it cannot be done. I've read that i need to format it into FAT format, so i'll try that, and some other things. but if anyone knows how to do it, please let me know, it'd be really helpful.