Having difficulty booting from USB thumb drive
Thank you Hennesie for the comprehensive and detailed instructions.
I am having trouble booting from the thumb drive made following your instructions. When I select the thumb drive as the startup disk in system preferences and restart, the Mac Pro doesn't see the thumb drive as valid then just boots from my Lion install.
This was exacerbated by my using a non-flashed non-Apple 5770, so I can't normally see anything until the login screen. I dug out the original card and plugged it in to see the boot screen, and the startup manager doesn't show the thumb drive as an option, just the Lion install and recovery partition.
I checked the format of the thumb drive, it is GUID partitioned and HFS+(not journaled, I believe when the BaseSystem.dmg is restored to a drive it formats it non-journaled).
I have also had troubles in the past getting the Mac pro to recognize a Win 7 install, and have had to swap HDDs in and out to get the system to pick the boot drive I desire, and some issues may remain from my experimenting with the bless command to try and get that to work back in March.
I have zapped the PRAM (while saying the archaic prayers to happy Mac that we remember from Classic days, of course), tried reformatting the thumb drive and rewriting it, and not had success.
I was stuck with similar problems with the Tiamo method and Mavericks back in March, and eventually gave up terribly frustrated.
Other things that may be be relevant: this was a Mac Pro 1,1 that a previous owner swapped dual 2.66 5320s(could be mistaken as to part number but they are each a 2.66 quad core). I do not know if / how well the previous owner updated the firmware or SMC, but the system does self-identify as a Mac Pro 2,1 in the system profiler.
Any thoughts or experiments to attempt are appreciated.