RSTS/E <-> RL02s

I have gotten RSTS/E V9.1 re-sysgenned on my 11/44 to include support for RL02s, RK05s, RX02s, and a few other things. I have spent some time getting the hardware configured properly. As a result of the new sysgen, I can now init, erase, and mount the RL02s. 'show dev' indicates the RL02 mounted, yet when I try to write to the drive, get a directory, or allocate the drives, I get a 'Device not available' message from RSTS. I have tried mounting them /PUBLIC, tried re-initing them, nothing seems to change. If I try to do anything with them dismounted, I get 'Device not mounted' as you would expect. I have the RSTS Orange Wall coming in a few weeks, until then I am limited to the 'help' facility. The RL02s are working fine, I have the docs and specs and have verified that they are 'OK'. The scratch pack I am using was new and never used before. During the Init process, I specified three-pattern initialization, which completed normally in about 15 minutes, finding and marking three bad blocks along the way. So... anyone have any ideas? What am I doing stupid? What am I *not* doing? Calling all RSTS Gurus.... Cheers John