Have you tried to put the disk in the other slot? Maybe the box can only boot from 1 slot.
I've read that the OS reside on the disk (a little bit strange for me but that's only my opinion)
Why would that be strange? Every PC in the world has it's OS on disk.
but there are no original images available for downloading
I have images here
, but installing them is not easy. Somewhere in this subforum you can find a long thread about installing it. When I remember well most people didn't succeed. If you only want 'a' OS, and not necessarily Lacie OS, I recommend you to have a look at fvdw-sl
, which has better support.