Herne Data Systems Ltd. - Disk Format Details

MAXI Form, MAXI Disk, and FreeForm can create special DOS compatible disks
that offer more space than their standard DOS cousins.  MAXI style extended capacity disks are transparent to DOS 3.2 and later.  The major
characteristics are outlined below.  Total disk capacity can be adjusted by increasing or
decreasing the number of cylinders.

Type           Size   Capacity Sectors per track Tracks per side
DOS 360k       5.25"   360k           9            40
MAXI 420k      5.25"   420k          10            42
DOS 720k       3.5"    720k           9            80
MAXI 800k      3.5"    800k          10            80
DOS 1.2 meg    5.25"  1200k          15            80
MAXI 1.4 meg   5.25"  1400k          17            82
DOS 1.44 meg   3.5"   1440k          18            80
MAXI 1.6 meg   3.5"   1600k          20            82
DMF 1.7 meg*   3.5"   1700k          21            82
DOS 2.88 meg   3.5"   2880k          36            80
MAXI 3.2 meg*  3.5"   3200k          39            82

*Note: DMF & 3.2 meg disks can be created by MAXI Disk for Windows and FreeForm.

Note, some systems require the driver program SMAX to read and write MAXI style
extended capacity disks properly.
SMAX is included with all current releases of MAXI Form, MAXI Disk, and FreeForm.
You can download it here separately if someone gave you MAXI formatted
disks and you cannot read them on your system.

(This page last updated 96-Dec-11.)

Comments and questions can be directed to us via e-mail at 
herne@herne.com.