I'm running Dell486DX. I have a hardisk that I want to add to my Dell. When I connect it, I connect 1) the wires from power supply 2) the flat cable from mother board on boot, I get error that "Hard disk controller failuare". I took another look at the hard disk, there are three places were you can connect wires. One for power supply, one from mother board, and one other one ( I believe it is also from power supply, it has three pins). What can I do, I don't have last wire to connect to the three pins? I have a similar hard disk 120MB working fine, "Conner" is written on the hard disk, but this one does not have the third place to connect wires.

User, The Conner IDE drives use the same 4-connector power cable and the 40 pin ribbon cable with the #1 (red edge) adjacent to the power connector (at the #1 pin). On the opposite end as the power/IDE connectors, you should see two groups of pins, on the right a group of 4 and immediately to their left a group of three. I believe the "left-most" of the group of three is the "C/D" pin--this one is jumpered for master and no-jumper for slave. If you didn't set the jumper for slave and its in its default [master] setting, the controller will report an error. That may be your problem. Ignore the 4-pin group and the other connector on the underneath side of the drive. Seagate's website has additional info related to Conner drives if you still need more info. You didn't mention bios, but make sure you auto-detect both drives and save both drives' settings. Kevin in Florida

Thanks A LOT. The "Seagate's" link you mentioned is excellent. I can from visiting the site, probabily find the problem. thanks, again cp30204

Did you Update Bios Settings and jumpers?