> Dec  6 15:22:37 cc184371-b savecore: /netbsd: kvm_dump_mkheader: Pread: Invalid argument

That shouldn't happen if you're booting from /netbsd and /netbsd is
synchronized (from the same sources) as the kvm library that savecore
was built from.  I'm guessing that you're not booting /netbsd...

-allen

-- 
   Allen Briggs                                     briggs@wasabisystems.com
   http://www.wasabisystems.com/      Quality NetBSD Sales, Support, Service