Hello lavaleta and welcome to Linus Tech Tips forum
As @Senzelian mentioned, it involves a bigger risk of data loss since you would lose everything on the array even if one of the drives fail. Moreover, you will actually have a slower initial booting time compared to a single boot time.
Having said that, you will have to go to BIOS and configure the two drives into RAID0 and they WILL be formatted, so if you have any important data - do back it up. After that, you would have to restore your backed up data or do a fresh install (which is the recommended step).
Hope this helps!
Captain_WD.