Abstract: A data storage cartridge that uses a tape buckling mechanism to connect a reel of tape to a tape drive is enhanced with a buckle reinforcement feature on the cartridge door. The reinforcement feature fits between two buckle clips of the buckling mechanism, and provides reinforcing support to the buckle clips. The reinforcement feature supports the clips and thereby prevents bending and misalignment of the clips. If the clips do become bent or misaligned, the reinforcement feature prevents the door from closing completely. A user will clearly see that damage has occurred, and the user will be less likely to damage the drive by attempting to use the cartridge. Furthermore, the reinforcement feature can be wedge-shaped, so that the user may straighten the bent clips by applying additional force to the door.