Mounting a disk on qnx2

I want to mount a second harddrive on qnx2.
How do I do that?

It depends on whether the first and 2nd disks are of the same type, and on the same controller.
If for example, you want to mount a 2nd IDE drive, the following may help

mount disk 4 d=3 p=2 +v

The first number 4 means mount this as disk 4
The 2nd number 3 means, mount using the existing driver that was mounted with disk 3
The 3rd number 2 means, mount physical drive 2, the slave drive