A data recorder comprises a tape deck having a recording medium in the form of a tape which is drivable by first drive means, in a recording mode, at one speed and drivable by second drive means, in a replay mode, at a different speed, the first and second drive means being operable to drive the tape through common drive elements and the arrangement being such that when the second drive means is in a driving position relative to the tape deck, the first drive means automatically is disconnected from the common drive elements, and when the second drive means is removed from its driving position, the first drive means automatically is reconnected to the common drive elements.
