2008 Sever Randomly reboots

Solution 1:

There's a small issue with a specific run of the HP ProLiant DL380 G6 servers tied to the power management unit.

Please see: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?locale=en_US&objectID=c01955503

A limited number of ProLiant DL380 G6-based servers and StorageWorks products (listed in the Scope section below) configured with a system board that has a revision number earlier than "0S" may reboot unexpectedly. During the reboot, the following message will be recorded in the Integrated Lights-Out 2 (iLO 2) Event Log:

Server Reset, Server Power Removed, Server Power Restored

When this occurs, no hardware errors will be logged, no events will be captured in the Integrated Management Log (IML), and the system will not execute an Automatic Server Recovery (ASR); however, the operating system log will indicate that an unexpected reboot occurred.

SCOPE A limited number of ProLiant DL380 G6 and ProLiant DL380 G6 Carrier Grade servers that are configured with a system board with a revision level earlier than 0S, that were shipped prior to 16 November 2009, and that have a serial number earlier than XXX 947 XXXX.

This impacted a lot of the first DL380 G6 systems I installed. It will require the firmware update at the link above and a power off, remove power cables, then power on to activate. Check your serial number range against the notice.

Solution 2:

It's a HP G6, there's a good chance it's still under warranty, it sounds like a CPU/chipset/memory/motherboard issue, get HP out to look at it. It's almost certainly not a software issue.

If you have another identical server swap out there disks, see if the problem stays with the server or the disks.