Thank you! Yes this worked - disk is now connecting with negotiated SATA 2 (3 GB/s) to controller!
P.S: this also improved speed by 30% on benchmarks, but I just ran into more troubles in SATA 2 mode, having had in SATA 1 / 1.5 GB/s sometimes UDMA_CRC_Errors when NCQ was enabled (disabling NCQ resolved it), it now has hard freezes for seconds etc. So I reverted back to 1.5 GBs :((
Seems the WDC WD2000FYYZ is kind of a diva at least with my older Nvidia SATA chipset; the previously used Samsung HDD did work fine in SATA 2 mode. Also tried different cables and ports before. I seen a buyers review on Amazon stating issues when it is not used on a SATA 3 controller. Well, I will try to analyse and collect more data and open another thread later.
