Abstract: A data storage tape cartridge having a misinsertion notch. The data storage tape cartridge includes a housing, a tape reel and a storage tape. The housing includes a base and a cover, each defining a front, a back, a first side and a second side. The misinsertion notch is defined in the base, extending from the front of the base and along the first side of the base. The misinsertion notch has a length less than approximately one-half a length of the first side of the base for facilitating proper insertion into a receiving frame.