i'm using USB-ROM on my N7 3G 32GB. My setup consists of a passiv USB-HUB, Sabre USB DAC and a 128GB USB 3.0 Flash Drive.
I checked the FI-Mode and all media-related options in the ROMs settings. By turning the ignition on and waking the tablet, the flash drive is shown as connecty under "slave devices", but it's not mounted and Poweramp could not resume the playback. After every wakeup i had to reboot the tablet, than it is working until i turn the ignition off.
Does someone have advise for me?