we not test this function;
below is allwinner document about sata.
• One SATA Host controller
• Supports SATA 1.5Gb/s and SATA 3.0Gb/s
• Compliant with SATA spec 2.6 and AHCI Revision 1.3 specifications
• Supports external SATA(eSATA)
• Supports power management features including automatic Partial to Slumber transition