It makes sense to open performance counters to monitor and watch the disk load.
And then think - what drives you need, what characteristics are critical.
About the RAID - before doing any RAID needs to be clear about why you need all this literature. What you want to achieve by making the RAID?
does it make sense to create a raid 10 on ssd drives under ms sql server?
Flip a coin, if heads has, if tails no.
With this baseline information it is the right answer.