You Sr deserve a Medal!
I'm not a Unraid user (too expensive for BR after conversion, unfortunately), but you just saved my 4 drives.
my problem was HBA didn't spin up the drive at boot, and then failed to detect those drives
solution was conect direct to motherboard ports, follow your tutorial and then HBA recognized the disks
I have used
for i in {0..4}; do ./SeaChest_PowerControl -d /dev/sg$i --powerBalanceFeature disable; ./SeaChest_PowerControl -d /dev/sg$i --EPCfeature disable; ./SeaChest_PowerControl -d /dev/sg$i --setAPMLevel 254; ./SeaChest_PowerControl -d /dev/sg$i --puisFeature disable; done