I dunno perhaps I'm not explaining my problem well. Anyway I know how to make a bootable Unraid USB stick and I also pretty much what it should look like when its running.
My Unraid server suddenly took a disliking to it's USB drive.
As kindly instructed by garycase in order to upgrade I used unRAIDServer-5.0.5-i386 and would have done a clean install but when I tried I got this
But when I try the same USB drive in my main PC, it works fine.
Does that make sense?
To make things even stranger when I used my Lexar 16GB USB drive instead with unRAIDServer-5.0.5-i386, It works on both PCs, unfortunately that's not the one I registered years ago
Also at one point last night my back-up of 4.7 also wasn't working & at that point I almost threw the whole thing out the window but for some reason it is magically OK now, so calm has returned.