I'll provide my posting in english language as well
I have a S300ah server board. Since i need to decrypt the filesystem with an usbpendrive, i would like to disable booting from usb in the bios completely. I do always want to boot from harddisk. If i plug usbpendrive in, start server, enter bios, i can switch the order. Next time i boot without usbpendrive pluged in, restart and boot with usbpendrive pluged in, the server tries to boot from usb again!
I appreciate your suggestions,
What happens if you disable the Legacy USB support?
Have you checked if there is anything that you can disable in Boot Configuration?
Let us know how it goes.