@trurl Oof, I'm assuming you're referring to how it's full of ATA bus errors along with the link dropping to 1.5gpbs? I also see "md:recover thread:multipledisk errors, sector=296933472" and then it seems to increment by 8 sectors on the next message of the same error.
What would I do in a situation such as this? Disk12 dropped out, didn't think much of it since it's USB and like you said isn't the reliable. Then during the rebuild Drive1 apparently died (Those errors seem plentiful and serious). Considering I was 5.8% into the rebuild of Disk12, what should my next step be? I picked up 2x used WD 8TB RED NAS drives from 2017 for $85/each so I have drives to swap if that's recommended. Going to try to preclear them in another system so they're ready to go + checked for SMART errors.
Thank for the tip on disabling spindown, I have the delay set to 8 hours up from 4 but will disable it entirely.