it was installed in IDE mode, my old mobo didn't have AHCI support
that's close to what I tried to say at first --- look it don't matter overall but like me I use old window drives set to ide [ all sata ] but if I did not need to read from the old drives achi is just fine once you set a drive to one or the other I found it best to keep it all that way-- and over all I don't see any performance gains over the 2 settings with a platter drive -- that's all achi just a newer driver and some improved features over ide but may not be optimized on a few drives .
as you said a drive set to ide and windows is on it, it wount boot to a computer set to ahci but over all either setting is just fine for platter