HP-UX 11i Release Notes (December 2000)

Superdome Systems
Superdome Machine Identifier (new)
Chapter 236
Superdome Machine Identifier (new)
The uname -i command on your Superdome systems may not return a
unique value for each system. To guarantee compatibility on current and
future platforms, use the new interfaces to getconf (1) and confstr (3C) to
retrieve unique machine identifiers.
These interfaces are documented in the manpages and in Chapter 13,
Programming, of this document.