BPI-R4 supports JMicron’s JMB585 (PCIe to 5x SATA chip)
lspci
cat /proc/partitions
Sorry, but what is the purpose of this post? Do you need help with something?
I guess,it’s just a report whats possible. He have done some similar posts with some more explanations.
Maybe than this link could be usefull for @TrueX.