Failed to mount

[Epoche]

I tried to install both the new desktop edition and the gnome edition. None worked.
I used an usb as an installing medium with the multysistem program (also tried with unetbootin).
The usb starts to boot but at one point I get a black screen and an error saying:
dracut: FATAL: Failed to mount block device of live image.
...(some other stuff)
"/dev/mapper.live-rw" does not exist.

The error persists on two laptops, an acer aspire 5610 and an acer aspire one 722.
What can I do?

[akdengi]

ROSA Fresh not worked with unetbootin

You need write ISO on USB like discribed this: http://wiki.rosalab.ru/en/index.php/ROSA_Installation