SD
Think I have seen this prob before but on a compaq laptop tried to install a 20G HDD system would not see it Problem was with an out dated BIOS once upgraded bingo system worked a treat
CC
Looked on the web for the MB you showed cant find Mercury version only a ZIDE version maybe you could look at the web sites on that.
2 types of drive in use 2day ATA or SATA one uses parallel the other serial data transfer