NOTE:
If a second disk is installed you get a primary partition on the second
disk and, optionally, an extended partition. You cannot boot DOS from
the second extended partition.
If you want a physical DOS partition on an SCO system, you
can create it before, during, or after you install your
SCO system, as long as you follow the restrictions listed below.
NOTE:
If you create a physical DOS partition before installing the
product, you must select the Preserve installation option to
preserve the existing DOS partition during hard disk initialization.