What is determined when the drive is functional and holds a primary partition, and the setup program checks hardware and alerts that "no mass storage devices were found"?

What is determined when the drive is functional and holds a primary partition, and the setup program checks hardware and alerts that "no mass storage devices were found"?

The DOS partition is taking entire space of drive. Customer needs to delete existing PRI DOS partition and create a new PRI DOS partition for less than the capacity of the drive. After PRI DOS partition is created, the user should create an Extended DOS partition for the WIN NT installation.