strange reboot on FreeBSD 6.1

[Tamouh H.]

Hello,

I have a machine that I've been monitoring for strange reboots. The machine is hardly ever used, in fact it sits idle 99.9% of the time. When a hardware failure occurs, does FreeBSD still records 'reboot' in the last command ?

All the sudden at no specific intervals, the machine reboots. No user logins, no access, nothing triggers it. Just a reboot. This is what /var/log/all.log says:

Jul 20 17:35:00 freebsd /usr/sbin/cron[27682]: (root) CMD (/usr/libexec/atrun)
Jul 20 17:35:00 freebsd /usr/sbin/cron[27683]: (root) CMD (/usr/local/cpanel/bin/dcpumon >/dev/null 2>&1)
Jul 20 17:35:02 freebsd kernel: arplookup 66.249.129.65 failed: host is not on local network
Jul 20 17:35:02 freebsd last message repeated 4 times
Jul 20 17:40:00 freebsd /usr/sbin/cron[27697]: (root) CMD (/usr/libexec/atrun)
Jul 20 17:40:00 freebsd /usr/sbin/cron[27698]: (root) CMD (/usr/local/cpanel/bin/dcpumon >/dev/null 2>&1)
Jul 20 17:45:19 freebsd syslogd: restart
Jul 20 17:45:19 freebsd syslogd: kernel boot file is /boot/kernel/kernel

[root at freebsd /usr/local/apache/logs]# last -n 42
mcuser        ttyp0    ip.ip.ip.ip    Thu Jul 20 19:07   still logged in
reboot           ~                         Thu Jul 20 17:45
mcuser        ttyp0    ip.ip.ip.ip     Sat Jul 15 18:27 - 19:22  (00:55)

Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Opteron(tm) Processor 146 (1992.34-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf58  Stepping = 8
  Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
  AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
real memory  = 1073676288 (1023 MB)
avail memory = 1041735680 (993 MB)
MADT: Forcing active-low polarity and level trigger for SCI
ioapic0 <Version 1.1> irqs 0-23 on motherboard
ioapic1 <Version 1.1> irqs 24-27 on motherboard
ioapic2 <Version 1.1> irqs 28-31 on motherboard
kbd1 at kbdmux0
acpi0: <A M I OEMRSDT> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x5008-0x500b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 6.0 on pci0
pci3: <ACPI PCI bus> on pcib1
ohci0: <OHCI (generic) USB controller> mem 0xfeafc000-0xfeafcfff irq 19 at device 0.0 on pci3
ohci0: [GIANT-LOCKED]
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered

Thx,

Tamouh Hakmi