You probably got a false negative. M. luteus should be oxidase +. To determine M. luteus do a MSA plate which should not produce acid and barley grow.
The volume name, or label, is a name you can assign to each drive on your system. The conversion (and some other utilities) will ask you for it as a way to confirm that you're really asking them to operate on the drive you think you are. We'll look at how to see, and set, the volume name on your drives.
The volume is given by the integral. This is sometimes called the disc method for computing volumes. If a curve given by a function x = f(y) is revolved about the y-axis for , replace x by y in the expression above to find the volume of the solid of revolution.