LinuxCNC install from USB

Could it be the file size limit on the USB

FAT16 / FAT32 / 2gb / 4gb limit (I use old usb sticks and have not had a problem, the one I tend to use the most is probably a 4gb stick and I've reinstalled LinuxCNC from iso a number of times whilst I dabble and try to figure out how to break it).

I have to assume it is something with Debian 10 as it worked fine when installing on the same system with the Debian 9 - LCNC2.7 ISO.

I found that the utility I used to make the USB drive made a difference. I first used the Rufus running Windows 10. Using the recommended ISO Image mode I had the detect problem, but ejecting the usb and reinstalling allowed it to work. In Rufus, if I selected DD image mode, it worked fine with no problems. Also, if I used a linux system and used the "dd" method it also worked fine.

Swag wrote: I have to assume it is something with Debian 10 as it worked fine when installing on the same system with the Debian 9 - LCNC2.7 ISO.

Yes, this is a problem with the Debian 10 installer.

The workaround is to unplug and re-plug the USB stick at the point that it complains about not finding the CDROM...

I had the same problem. Installing from a microSD in a card reader. No combination of unplugging/re-inserting helped.

So, I put the ISO on a regular USB memory thingy – a Lexar 4GB. It worked fine.

When I was dd-ing the ISO on, I noticed that it was close to 2GB, maybe slightly over? My microSD was 2GB
It booted live image OK, but maybe the install uses different parts of the ISO?

If the image is bigger than the card/usb, DD will just report it at the end when it has no more space to write to, only if verbose mode is used. The resulting card/usb will not be usable in almost all cases.