<page_title> 9 track tape </page_title> <section_title> IBM generations </section_title> <table> <cell> Density (bits/in/track) <col_header> IBM Model </col_header> </cell> <cell> 800, 1600, 6250 <col_header> 3400 Series </col_header> </cell> </table>
Nine-track tapes had densities of 800, 1600, and 6250.