Okay, that's an objection.

> a) stop pretending we have any idea what the geometry of a SCSI disk
> is, and just make it one large track, or

Questionable.  We still need the BIOS geometry for, say, fdisk, and
fdisk will retrieve the geometry recorded in the label.

> b) make the warning from disklabel(8) non-fatal.

Maybe the disklabel should display a sectors per unit in the label,
rather than always computing it based on the geometry?  That ought to
be an easy change; I'll do that instead and get back to you.