Info about active DMA transfer modes can be ignored.
SATA devices emulate the behavior of PATA transfer mode supported/enabled bits in ATA IDENTIFY data.
Legacy IDE drivers could still be used to access SATA devices if controller is set to IDE Mode. A "Set Transfer Mode" ATA command issued by a legacy driver modifies IDENTIFY bits as expected but has no effect on the actual transfer rate. But changing to any PIO mode would have a significant effect as the legacy driver would use slow programmed I/O then.