LTO-8 is 12TB of raw storage on 960 meters of tape. Wikipedia says that a C90 cassette tape was 135 meters. Now ignoring all the other differences (width, ser

LTO-8 is 12TB of raw storage on 960 meters of tape. Wikipedia says that a C90 cassette tape was 135 meters. Now ignoring all the other differences (width, serpentine winding, chemistry, etc. etc.), that gives us roughly ~1.6 TB of data if a C90 (90-minute) cassette tape had the rough bits-per-inch of a modern LTO-8 tape.