DragonflyBSD on QEMU booted right but can not install!

[Sergey Zigachev]

> For sure, it should not run in this way. What is the problem that DragonflyBSD could not boot regularly in QEMU?
I can boot DragonFly in a QEMU VM without any issues.
It is possible that you installed the system using different qemu parameters, so installer picked up drive's serial number "QM00001" and used it. Then you're trying to run the vm with another parameters that don't supply the serial number and now both bootloader and /etc/fstab botched.
You fixed bootloader by providing the correct disk name (vbd0s1d) and now you have to fix fstab: replace "/dev/serno/QM00001." (note the dot) with "/dev/vbd0", so you have (i guess) /dev/vbd0s1a, /dev/vbd0s1b and /dev/vbd0s1d devices.
Or do a clean install, but don't change drive properties. I did it recently and everything just worked.

> To be honest, I don't need DragonflyBSD to install on disk. I just need to run Fortran (even in Live mode with QEMU) when typing root (instead of installer). Is it possible to add GFortran (From GCC) in DragonflyBSD live mode?
I don't know much about that, maybe someone more knowledgeable will chime in.