yes, you are right , i never knew this is is good at least i figure out what is happening ... the exact sata ports that m.2 is disabling.
I change the old hdds to different ports and they show up.
Now question is: if i buy a m.2 adaptor to PCIE similar like this :
http://www.amazon.com/gp/product/B00MYCQP38/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00MYCQP38&linkCode=as2&tag=tinkertry-20&linkId=UAU4IQVJG2GAADQP
, will the 2 sata slots still be disabled?
I am asking this bcs i have 6 sata slots, 1 is dvd rom, 2 are disable by m.2, and in future i may need more sata slots. I would like to have like 4 hdd: 2 for backup , 2 for normal storage, 1 dvd , 1 m.2 for sistem use.