Z4 can' recognize HDD Sata

HI,

I have a new Z4 with a PCIe SSD 256 + two Sata HHD. I have another two SAS  from Z840 not using then I replace two Sata by Two SAS. But Windows & BIOS can't see SAS. I check all and found Z4 have no support for SAS HDD then I bring back two original SATA HDD. Then now BIOS seeing to SATA but only in Checking HDD feature. The Windows 10 64 bit totally see nothing on SATA drivers.

Any one know and advise ?

Thanks

Long