Similar to an earlier thread [portable (really) Fedora on stick], I am
trying to create a portable Fedora 27 install on an external USB hard
drive. I have done this in the past as recently as Fedora 14, but
things have changed since then, and I seem to be hitting some
unexpected issues....
The install proceeds as expected, no apparent errors, etc. But then
when I go to boot the external drive, it immediately displays
"Operation System not found" - Note that is is "Operation", *not*
"Operating".
Googling, I found suggestions regarding setting boot flags which I
have tried to no avail.
In the thread mentioned above, there was a step to use dracut to
rebuild the initramfs files, which I have done, again to no avail.
(This step was done by using the install USB stick, the "troubleshoot"
option, and then chroot'ing into /mnt/sysimage).
Any suggestions as to what I should try next?
Some additional info....
Internal drive has been wiped, and is not bootable.
External USB drive is 4TB, and has a GPT partition table using the
default layout provided by the installer.