Use Raid 0 for OS (with cavets)

You should seperate the data you use vs the programs and OS that you use.

Additionally assuming you can plan ahead build the OS and programs on Raid 0 which will double your read write speeds that allows the system to self distruct if something goes wrong but can easily recover if you have an ongoing backup solution..

instead of the 1200MBit/sec you can have 2400Mbit/sec (remember that this is shared so it drops down by half or more with multiple operations)