From a couple of previously closed post, I am under the impression to try and use an Ultra IDE 80 pin connector whenever possible with respect to connecting a hard drive to an IDE controller on the motheboard and to use "cable select". Now, this brings me to a question. Is cable select a recommended or required jumper configuration for a hard disk drive using an Ultra IDE 80 pin connection? As I understand it, when a HDD is set to cable select, the IDE controller on the motherboard decides what IDE channel the drive will use instead of the user. Master and Slave settings are more "manual" settings and Cable Select is more of an auto-configuration or autodetect IDE channel configuration. Additionally, it makes sense the BIOS will display the IDE channel assigned to the HDD from the cable select jumper configuration as well. For example, the bootable HDD will either be identified as a Primary Master or a Secondary Master at the POST screen. I don't think Primary Slave or Secondary Slave configurations can be used for bootable drives, but, I might be mistaken on that part.
In closing, any shared insights given to this question will be appreciated. I will look forward to reviewing everyone's feedback to this post.