< >a third-party dual width card with light blue ejector handles with < >"UDC11" stamped in white letters on one. Don't know where the ribbon < >cable goes that's connected to it. I'll take the BA11 chassis out and < >peek inside tonight and report what I find on these questions. My guess the tape is not tu58 but a DC100/300/600 series tape. There wasn't a tu58 that mounted to a 5.25hole unless it was a hack. Also TU58 is easy to recognize as the drives are bare (no electornics) and the use a board that is roughly 5x10" with serial interface to the host. Also TU58 was a dual drive system though it could be configured with only one. Allison