I have ten identical machines, and want to deploy the same Ubuntu 12.04 image on all of them. I've done a complete install on one of the machines, and cloned the disk using
dd. The issue is that if I use
dd to write this image to the disk of another machine, it will no longer boot. That is, the machine reports "no bootable devices found" on all machines except the one where I created the iamge.
I suspect that this may be due to something device- or machine-specific about the way the UEFI boot is set up, but I can't say for sure. I don't do anything out of the ordinary as far as I'm aware.
For what it's worth, running Boot-Repair on one of the clones does fix the problem and let the machine boot, but I'd rather not have to run that manually on every new machine I want to clone the image to. Also, this seems to tie the drive to that machine, so inserting a "fixed" drive into a machine other than the one Boot-Repair was run on will yield the "no bootable devices found" message again.
Clearly it must be possible to construct an image in such a way that the UEFI boot entries will work on any machines, as this is what the Ubuntu install image does, but I have no idea how it achieves that?
If it's of any help, here is the boot info file generated by Boot-Repair when it fixed the disk on a new machine.