When installing a hard drive and a CD-ROM drive in the saperate IDE channel?

For performance reasons, a Hard Drive and CD-ROM drive should be on separate IDE channels. This is because both drives on one channel will share bandwidth, making them run at only half the speed if both drives are active at once (i.e. installing a program from CD-ROM). Both drives should be configured as "Master" drives (according to the jumper cables), since they will both be the master for their respective channel.