On Tue, Aug 03, 1999 at 04:50:19PM -0500, Wenchi Liao wrote:
> 
>        "machdep.diskinfo: unknown structure returned"

It's not a serious error; it's just a warning that there is
a sysctl variable that the sysctl userland program doesn't know
about. sysctl(8) needs some help with interpreting structures because
it can't know what is in them. A few structures are special-cased
in sysctl.c, but not this one. It's machine-dependent and would
take some space to print out as well.

- Frank