I have a T21 thinkpad model number 2647-4bu that I want to run Linux on. If I purchase a second hard drive for the ultra-bay will I be able to boot Linux from this second hard drive. I don't have any experience running or installing multiple OS's on one machine. I don't want to partition the main hard drive as it has a lot of valuable info and probable not enough free space to install Linux. I figure it would be safer to install on the second hard drive and boot from that. I need a definitive answer as this is the only reason I would purchase the second hd. Also which version of linux would be best for my T21?