This is probably the point where it's worth pointing out that the @#@!#! i386
port won't let you use all the sectors on the disk; the approximate geometry
that the disk reports usually multiplies out to less sectors than the total
number, and if you make a partition that extends past the "last cylinder" you
lose.  This can be a PITA when, for example, one's trying to mount disks
labelled on other ports, or has airlifted the Ultrix disklabel reading code into
disksubr.c in order to read Ultrix disks.

So just be careful that you label the disk based upon the *geometry* you get
back from the ioctl; the fake in-core partition table extends past the end
of the disk, and if you use it to, for example, make a filesystem, you won't
be able to write a real label that will let you use the whole FS you made!

Thor