@scottalanmiller said:
This is RAID 1. RAID 1 with a quintuple mirror. This would border on the crazy. Even with spinning rust, a standard RAID 1 (two way mirror) has a failure rate lower than 1/160,000 years. Each additional drive in the mirror takes that up orders of magnitude.
With the first option I was just mentioning an arbitrary, contrived example of another span configuration the controller would let me do in its Raid 10 config wizard in hopes that if there was a flaw in my 2-drives-per-span thinking someone would point it out to me. Everything you've said makes sense, thank you.