Recently, we’v been building new DL380G6 and some of them would just reboot for no other reasons. This was finally traced to the BIOS issue for a certain batch of proliant servers. So if your server has a revision earlier than Rev 0S shipped prior to 16 Nov 2009 and server serial number prior to XXX947XXXX, where the 4th characther i the year code and 5th and 6th is the week code of manufacturer, you’ve got the problem.
The good part is that is solvable, the bad part is that the BIOS update needs to be manually done including unplugging the power physically.
Advisory: (Revision) HP ProLiant DL380 G6 Server – Limited Number of Servers Shipped Prior to November 16, 2009 (11/16/2009) and Configured with a System Board with Revision Level Earlier Than Rev 0S May Unexpectedly Reboot
A quick workaround is to change the BIOS profile to “Max Performance” from “Balanced Power and Performance” profile… but didn’t seem to help some of the servers.