Yes, the non-boot SSD is recognized and the LED does work. At the present time the unit is temporarily plugged into an internal USB until I get this figured out.
The idea I had was turning off the computer and swap between Windows and Linux, booting from which one is in the MB741SP-B unit at that time. I'm using SSDs and the computer is a Dell Optiplex 980. The MB741SP-B unit is installed below my optical drive using the Flex-Fit Trio. In the 3.5 drive bay is the MB521SP-B unit but that is connected to an internal USB and I use it for my finished publishing files that can be read from either Windows or Linux and those files are kept in a safe when not in use
I can boot from the optical drive and from the SSD C-drive and use an SSD D-drive for editing and I'm a bit unsure how to get the MB741SP-B to boot. Once I get that figured out I will move the SSD C-drive to the MB741SP-B unit and use the two open bays in the Flex-Fit Trio for editing and other software in respect to which operating system I'm using at that time.
It sounds a bit elaborate but, I try to keep everything off the primary in case of an OS crash. I've lost way too many of my writing works in drive crashes not to take precautions. The goal is to boot from the MB741SP-B unit in the Flex-Fit Trio, use two SSDs in the trio for software, and the MB521SP-B unit for my works saved on an SSD and can be ejected and stored in my safe when not in use and a copy of it on a cloud server.
I'm positive I'm missing something that is more than likely really simple and I'm not seeing it.
Well, that about sums it up. I suppose everyone has their quirks and their computer setup just as quirky.
Thanks a bunch for your help.