Why are you adding a second drive in R0 in the first place?
Is it because you need the added speed for your daily work (doesn't help in benchmarks outside of PCMark, BTW...). If you don't need the throughput, do you like the added risk of losing your data/array for no reason?
If its just because that is OK, but... if I was you, I wouldn't R.0 anything as you don't need it and it introduces more risk to your system.