in old system (8100,z370m), all harddisks connect to motherboard sata port and harddisk(all are sata disk) spindown work well   in new system(10900 z490m), some harddisks connect to a HBA card(ASR-78165, work in HBA/direct mode), others connect to motherboard which disks connect to motherboard spindown works well as in old system but which(1 disk without read/write) connect to HBA spindown, then spinup by read SMART operation quickly those disks' [Spin down delay]