This is from dictation.
it would help if you would provide some details about the make and model of your computer and also the code for the be BIOS. The BIOS should have a version number or a code number that identifies when it was last updated or revised.
The behavior you describe with the use of SATA solid-state drive is the normal behavior for most desktop and laptop computers. Even though there is space inside to put two drives, and there are two separate channels to connect the drives, only one of the drives will be eligible for boot. Below is a typical boot loader found in many desktop computers.
1. Check to see if there is say disk in the DVD drive, if so try to boot from it.
2. Check to see if the first hard drive is bookable.
3. Boot from some other device.
Before you started this experiment, did you have some source or reference that indicated to you it would be easy to boot from either one of two SATA drives? from my own personal experience the only way I can get my system to boot from another hard drive is to use some type of boot manager either inside of Windows 10 or else inside of a Linux distribution. Are you using Windows 10 and have you attempted to set up a secondary hard drive and say boot partition using the utility program such as Easy BCD?
Here is the link to our you can get a copy of the
EasyBCD.http://neosmart.net/EasyBCD/It is free for non-commercial use. For use in a business they ask you to buy it.
I hope this information helps you out.