I’m not sure that I understand what you’re suggesting. ada0 is the primary harddrive, da0 is an external drive lite an optical device or an USB device.
My primary desktop computer has two harddrives (and I know for sure it’s EFI) :
A primary 120 GB SSD that carries the system, called ada0.
A secondary 1 TB HDD that I use for storage only, called ada1, also formatted with ZFS.
I never tried to install any BSD system on an external harddrive via USB.
What you read in the post with 111 messages was about when I tried to install TrueOS onto my former Asus X102BA, that in fact was EFI although it wasn’t very graphical as my desktop is. But it was built for Windows 8 with secure boot and all the other garbage. However, it didn’t work, no matter what I did. I’ve also read that (you must have seen that too?) TrueOS has an issue with Asus computers and possible also with AMD CPU’s. That is what makes me unsure whether I should try to overwrite my fully functional 10.3 PC-BSD system (although it’s old and has started to limp a little - but it has no major problem) on my desktop computer with TrueOS since it’s in fact is an Asus with AMD CPU, although it has a GeForce 210 NVIDIA graphics card.
I’m starting to think about to try it with another harddrive (I have a 250 GB 3,5" HDD laying around) and simply temporary replace the primary ada0 with that one so I can test if the hardware accepts TrueOS without risking to destroy the PC-BSD installation. In this case it would be nice if it would be possible to do this test external via USB so I wouldn’t have to physically change harddrives. But I don’t think it is.
About the Asus vs Acer laptop.
I was able to get a refund on it from the shop where I bought it. Instead I bought an used Acer Aspire 1810TZ (you must have read it) that runs TrueOS with no problems. Before I bought it I ran my Asus-installed disk (that didn’t work on the Asus) external on the Acer and it worked although the drivers must have been all wrong. But that’s the only time I tried to run TrueOS from an external drive.
So you don’t need to tell me how to partition, format and install an OS. I know all that. My issues both back then and now was simply that the computers didn’t accept TrueOS. And this time it was extra strange since it was an Acer Aspire with Intel CPU and Windows 7 as OEM. Same as my laptop (although it’s another model) that has accepted TrueOS with no problem, while my friends machine after reboot asked for a login that wasn’t there instead of going into the section to ad username and password etc. So instead of keep on struggling with it, I gave up on it and installed its OEM Windows 7 again.
Just about your second post.
When I install I run the graphical installation all the way and only check so I’m on the correct disk
You’re right, I’ve never heard about this. But I don’t understand what good it would do? If the hardware don’t accepts the OS, then I can keep on doing command line checks until I turn blue