On Mon, 4 Jun 2018, Fredrik Pettai wrote:
Sure, which NetBSD image would you recommend that I try to boot from? (the box has a cdrom-drive)
just grab a recent HEAD build from http://releng.netbsd.org/cgi-bin/builds.cgi
http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/201806040210Z/ seems ok for sparc64 today.
alternatively try to boot from a ldom, though not as easy as booting from a cd image