Hot answers tagged boot
You could use /etc/rc.local, it is present on all of the systems you mention. It is executed after all of the other initialisation scripts, see the comments in the file for more information.
ESXi will run from a USB stick, that is probably the easiest way. It won't be straightforward to dual boot just like an OS from the harddrive because it uses multiple partitions set up in a certain way, rather than a single booting partition.
I had the same problem and finally solved The problem seems to be in update-initramfs that doesn't generate the initrd properly. "evms_activate not found" means that the /sbin/evms_activate file is not created inside the initrd file by update-initramfs So, my workaround consists in unpacking the not working initrd, and copy the evms_activate executable ...
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