since you did not say that you system did not see a drive i am asuming that you have your jumpers set right
But my computer did not
detect any harddrives if both of my hard drives are connected. If my seagate drive is the only
hard drive connected, then my computer does detect that one.
And my jumper cables are
right, the Seagate is the master and the IBM is the slave.
I went to BIOS and set the boot device to all the same spot like this:
First Boot device : HDD-0
Second Boot device : HDD-0
Third Boot device : HDD-0
And the problem is still there, it won't boot from the seagate drive for some odd reason when the IBM drive is present.