I own two Compact Flash 4 GB. One of the cards is common Dane-Elec Compact Flash and another is a Dane-Elec 300XS UDMA.
Any of them that I insert in RB1000, it does not start.
I make the following:
Turn off the RB1000, insert the card and turn on. No beep is issued and the system does not load.
RB1000 with ROS 4.1 and bootloader 3.20.