  Right. RAID and non-RAID are not inter-compatible.   Yes, software RAID, managed by Windows Disk Management. Absolutely possible, and absolutely safe. Main reasons to use hardware RAID are moving load from server hardware to RAID hardware and increased performance. The S-series controllers do neither. In fact, performance will be much better on OS-managed RAID.
Hey Guys, I've taken over the job from another admin and noticed that the two Hyper-V machines which work in a failover cluster do only have one hard drive each.Therefore I want to create at least a RAID-1 for each machine.Question: Is it possible to add another disk for each server and create a RAID-1 without reinstalling the OS (Server 2012 R2) ?Thanks,Dan
R420 / PERC H310 Mini Upgrade from Non-Raid to Raid-1