While the basic commands should suffice to partition your disk,
disklabel supports a variety of advanced commands. We’ll look at a few of them now.
Remember all that stuff at the top of the disklabel that shows the drive’s basic physical characteristics? You can change all that, but it’s almost never necessary. In fact, if you think doing this is a good way to solve a problem, you’re probably on the wrong track.
If you enter
disklabel walks you through each entry on the upper part of the disklabel. The existing values are presented as defaults, allowing you to quickly walk through the variables until you reach the one you want to change:
> e Changing device parameters for /dev/rsd2c: ...