So I installed Raspbian Stretch Lite on a USB Flash key and can successfully boot from it. Now I wanted to attach and auto mount another USB HDD Seagate of 1TB to it. Manually I can mount this 1TB disk and it works okay. But when I reboot the Pi it does not boot. There appears nothing when it tries to reboot - just a blank screen.
I thought I may be making some mistake with fstab entry so I removed the added entry. Plug the HDD but it still goes to blank screen when rebooting.
HDD is connected to powered hub with 2.5A supply. Do I need to make some special changes if I want to attach another USB HDD when it is already booted off a USB flash key? Thank you!