using the Kennedy tape drive under RT11

Hi all, I have connected the Kennedy 9100 open-reel tape drive to my 11/84. The interface board is the TC131. It sits in a UNIBUS slot, and the 3 cables are wired to the tape drive. The NPR switch is set for that slot. I can mount a tape and after pressing "LOAD", the tape is moved to load point, after which I can by pushing a button set the drive on-line. So far, so good. When I boot RT11, I see (with .show dev) that MT at 172520 is installed however, MS at 172522 is installed too! Using RSX11 (show aco) it lists: MTA - CSR 172522. That seems like a conflict to me: MTA (172522) and MT (172520), where at 172522 would be MS ...? As this is my first actual use of tapes, this is my first puzzle. Next: suppose I mount any tape (contents unknown and irrelevant), which commands could I execute? I tried the following (excuse my stupidities) under RT-11: .dir ms1: --> returns: ?MON-F-Dir I/O err - 011020 .init ms1: --> returns: ?MON-F-Dir I/O err - 014740 is this meaningfull to somebody? Should these commands execute correctly? thanks! - Henk. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.