I recently bought a 2TB Seagate Barracuda 7200rpm Hard drive and also received a 1TB WD 7200rpm hard drive as a gift.
In my current build I have a 128GB SSD that I run my OS off of, a 300GB WD 7200 rpm that I'm removing and giving to a family member, and a 500GB 6200rpm 2.5" hard drive that I throw on backups, pictures, and movies.
I was thinking of Raiding either the 2TB and the 1TB together or the 1TB and the 500GB hard drives. I was wondering if you can even raid 2 different speed hard drives together or if it just increases the failure chance. I was also wondering if it was even worth raiding? I use it mainly for Gaming and Virtual Machines.
It really depends on the type of raid you want. Do not raid0 2 drives of different sizes, you waste the difference. Same applies with Raid1. You can go JBOD, meaning "Just a Bunch Of Disks", to make your two big drives look like one giant one. Do some research before you do anything....