If you're using slower drives I would probably go RAID1 (OS) + RAID10 (DB) in your situation - but you would also want a hot spare (at least a cold spare) so you're talking 7 drives there. If you are ...
Years ago, partitioning your hard drive was a smart way to organize files and simplify OS reinstalls. However, with the advancements in storage technology and the prevalence of cloud services, drive ...