ok it work now The solution was the sata cable was plug to sas in motherboard i changed to sata it work now !thank you for you help
hi I bought PowerEdge R420 without raid controllerand i have only one ssd...When installing Windows the sdd it does not appear to meand when i put it in front the yellow light turn on only for one sec than go off And I am sure i install it correctly in front  Does the server work without raid controller i mean the storage  [IMAGE]   [IMAGE]   [IMAGE]   [IMAGE]   [IMAGE]  
PowerEdge R420 without raid controller not working