It is NetBSD 7.0 amd64 The swap size is 8 GB, and the memory of the PC is 4GB.
This the /etc/sysctl.conf file: pc2$ grep -v '^#' /etc/sysctl.conf ddb.onpanic?=0 kern.ipc.shmmax=160000000 vfs.generic.usermount=1 machdep.sparse_dump=1 kern.dump_on_panic=1 I have tried with: reboot 0x100 reboot 0x104 halt|reboot -dq etc without sucess. I have tried to add savecore=yes to /etc/rc.conf. Doing a halt -dv o reboot -dqx, I can't see any message that it tries to dump. I have tried also to do a: sysctl -w kern.dump_on_panic=0, and it didn't work. pc2# swapctl -l Device 1K-blocks Used Avail Capacity Priority /dev/wd0b 8389568 0 8389568 0% 0 By the way I have seen a strange thing: Doing a rcorder , swap1 and swap2 are execute before of savecore. I thought that savecore that should be executed before of adding swap. pc2# rcorder * wdogctl fsck_root modules resize_root root ccd rndctl cgd lvm raidframe DISKS swap1 fsck mountcritlocal random_seed bootconf.sh ttys pf_boot ipsec ipfilter sysctl network wpa_supplicant dhclient dhcpcd ldpd npf pf route6d routed rtsold staticroute NETWORKING mountcritremote sysdb newsyslog wscons syslogd ppp named rtclocaltime ntpdate rpcbind ypserv ypbind yppasswdd mountall perusertmp cleartmp xfs accounting amd dmesg fccache veriexec ldconfig quota mountd nfsd nfslocking pwcheck gpio ipnat securelevel swap2 virecover altqd blacklistd ifwatchd isdnd downinterfaces ipfs ipmon kdc pflogd racoon savecore SERVERS DAEMON apmd bluetooth bootparams devpubd dhcpd dhcrelay ftp_proxy irdaattach local lpd makemandb mopd motd mrouted ntpd powerd rarpd rbootd rtadvd rwho screenblank timed tpctl LOGIN xdm wsmoused sshd raidframeparity postfix ndbootd moused mixerctl mdnsd isibootd iscsi_target inetd identd httpd hostapd ftpd envsys dbus cron pc2#
