You didn't say whether your drive is SATA or PATA. If it's PATA, be sure the jumper is set correctly as Master, Slave or Cable Select.
Three issues to consider in PATA setups:
1. When using Cable Select, the system will recognize the drive at the far end of the cable as the Master, and the one on the middle connector as the slave. If you have two drives on the one IDE channel, setting either drive as anything other than CS could screw up the way the board recognizes one or both drives.
2. If the physical layout of your setup doesn't allow easy routing of the cables to accomodate the above connection order, you should set the jumpers on each drive as Master or Slave. This forces the priority order, regardless of which connector is attached to which drive.
3. I've seen some boards, even newer ones, that don't handle Cable Select well. Sometimes, it's only with particular brands of drives. I can't recall which boards and which drives, but I know I've seen the problem on a few Asus boards and with a few WD drives.
This may not be the problem, but if setting the jumpers to force the Master/Slave assignment works on your system and Cable Select doesn't, you'll have your answer.
Good luck.
