The new disk is called C<test1.img> for the first I<-N>, C<test2.img>
for the second and so on. Existing files in the current directory are
-not overwritten, so you may need to do C<rm -f test1.img>.
+I<overwritten>.
The type briefly describes how the disk should be sized, partitioned,
how filesystem(s) should be created, and how content should be added.