[Coco] Coco drives single and double side question.

[Ghislain Harvey]

Hi great community.
I have a Coco3 128k with 2 drives that are double sides. DIR0 and DIR2 is
for the same drive but can access different data.
I would like to know if there is a way to make the system work as its only
Single Sided? IS is a command related or I must absolutely used single sided
Drives?
Thanks
Ghislain Harvey