I'm installing three devices via IDE. One is a IDE Harddrive but this drive will be for backup purposes and not the primary drive. I will be using a SATA harddrive as the boot disk. The other two IDE devices will be two CD/DVD drives. I'm installing them into an Asus motherboard and am not sure which IDE slot the three devices would go into. The manual says one is for a Slave device, and one is for a Primary device, and one is for a master slave device. If anyone could tell me which one I would want to plug each one of these into I would appreciate it. Thanks.