i had 2 pata alredy in my pc bothe were working fine but whne i tried the third hdd pata and inserted in to pc and strted then it gave error "unbale to load OS" soon i removed the third hdd and sterted but it showed the same msg unbale to load os THen i removed the 2nd one and strted now i am left with one HDD 2nd hdd has lots of DATA for studies and now the 2nd hRD DISK is not detecting by BIOS what to do how to make 3 HDD works