Once or twice per day I find a server I have powered off with no apparent reason.
Info and what I've done until now:
- Nothing is being reported under
/var/log/. Just normal server activity and then the startup logs when I manually power on the machine.
sensorsalways give me normal temperature values which remain normal throughout all days in which the problem occurs: http://pastebin.com/gk8JuPCK
- By physically inspecting the PSU (Thermaltake) and other parts of the tower I find nothing worrying. The inside is pretty clean (dust free) and all fans are working problem free.
- In the BIOS settings there is an alert configured for when the CPU reaches 60c but that is very high. Also note that the setting is at "alert" and there isn't a "turn off" setting as I remember from other BIOSes.
- I've memtested the whole memory many times without a single problem. Also I don't think it's a memory problem since I've never found the server in a halted or crashed state, but always powered off.
- The server is connected on a UPS which supplies other similar servers as well. The other servers had never had this problem. I've even exchanged the power cables and UPS outputs between 2 servers and the very same server had this problem again. So it is not a matter of UPS.
Where should I look next?
AMD 64 Processor 3500+ 2 x 512MB mainly runs SVN and DNS. No X sessions take place and no users are logged in.
Linux version 2.6.26-1-686 (Debian 2.6.26-13) (firstname.lastname@example.org) (gcc version 4.1.3 20080704 (prerelease) (Debian 4.1.2-24)) #1 SMP Sat Jan 10 18:29:31 UTC 2009