Well, it does not seem to be a port or cable issue. The SSD was lost again tonight. I was trying to repartition it, and it kept changing how much I could shrink the volume. I decided to run a disk check on it, rebooted for the check, and the drive disappeared. I'm now trying to power cycle the drive per Crucial's instructions for this issue. We'll see if that has any better results. If not, I may make it a secondary drive and install an M.2 SSD.
