Using 4 HDDs in my Helios 4 with Openmediavault 5.5. After a update & restart all the HDD's are gone (not shown at all in lsblk anymore). After poking around in the the systemmessages i found this in dmsg, but don't know what to do with it.
[ 1.746837] ahci-mvebu f10a8000.sata: supply ahci not found, using dummy regulator
[ 1.746909] ahci-mvebu f10a8000.sata: supply phy not found, using dummy regulator
[ 1.747062] platform f10a8000.sata:sata-po