@Pluvichorsplit your post here since this isn't really about unclean shutdowns.
There are errors on disks 1 and 2 immediately after array start, probably not coincidental that both disks are of the same model, first thing to try is to update the LSI firmware to latest, the one you're using has known issues, if that doesn't help try connecting those two disks to a different controller, you can swap with another two.