A gross information capacity of 100 million 8-bit bytes is achieved in this 12-disk pack by the use of 19 data disk surfaces. Data is recorded on 404 tracks per data surface.
The track spacing gives approximately 8 tracks per mm, each containing a maximum of 13030, 8-bit bytes of information. The recording density varies between outer and inner track and reaches a maximum of 159 bpmm on the innermost track.