Thx for quick reply. I tried to disable all the sata controlleres got this mobo : Asrock Z77 pro 4-M. It got 8 sata and im using 4. When im disabling the sata and no disk connected to sata, all 8 disk are availible in Xpenology. I wil try to set disk in IDE mode and not AHCI. When 4 disk are connected to mobo sata, they are hown as external sata?