うちはこんな感じで問題無し

ada1 at ahcich4 bus 0 scbus3 target 0 lun 0
ada1: <ADATA SP900NS38 5.6.0> ACS-2 ATA SATA 3.x device
ada1: Serial Number 2E2820001543
ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 512bytes)
ada1: Command Queueing enabled
ada1: 122104MB (250069680 512 byte sectors)