Tim wrote... It's an Emulex. The card has silkscreened Assy TU0210401 REV C. One one of the chips, it says Top Assy TC0210201-FSH, Sub Assy C6716 C. Two 50 pin ribbon cables look pretty Pertec-ish to me. There's a 4 switch dip and LED between the ribbon cables. There's also a 20 pin header (2 rows of 10) on each side of the ribbon cable connectors. In the center of the board are two 10 position dip switches. There's 3 sets of wire wrap jumper pins as follows: at the top A,B,C,D in the middle E,F,G, and at the bottom H,J,K,L. On my board, the 4 switch dip SW1 has all switched towards the PCA (closed). On the center two 10 position dips, SW2 is all down or off except #8; SW3 all are down or off except #1,3,7,8. On wirewraps, A-B, C-D,E-F. There appears to be a few ECO wires added to the board too. In my version of RT11 (5.04), /init isn't a valid option on the backup command. But, when I do a backup/dev du1: ms0: it does ask if I want to initialize, that seems to complete, then the backup goes on and finally an output error. Once I get the tape controller reinstalled, I'll tell you for sure. Yup, pertec. It would appear to support 800 and 1600, because the density switch toggles between PE and NRZI one at a time (plus a remote setting for each). Really! I didn't know that. When I got the tape drive, it had been in storage and was immaculately clean. Other than usual wear on the door, it looked in fantastic condition. What's involved in aligning the heads? I take it I would need an alignment tape? 1600bpi seems to work great though, both reading and writing. Any help is most appreciated! Jay West