When you do try a larger drive on your 4100, you might see a warning listed in "info log -T" about 48bit LBA's not being supported. If so, then the counter is always 0 and your stuck.
After going through the Flash code in the .sup files and every IC and connector on the board, my only WAG at this point is that by switching the model number to fake out the OS will there be a chance that 48bit LBA would be supported.
The 4100's can boot with no drives attached and get into the debug screen.
You can go to the regular admin page if you don't require language packs.
The earlier models do have the OS on the drive and switching model numbers makes the boot look for it there.
You can still get in to the debug screen, just the error "psuedo flash not found" will be in the log and it won't see any drives.
Why I hope to get the first 64Meg (32 is probably all you need) of another model that has the OS on the drive to prove it.
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