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hp proliant ml150 g6 Sudden Random Reboots

We recently purchased a ML G6 HP ProLiant Server and it has been successfully working for several weeks.  When I entered the office today I was greeted by a message saying the server hadn't shut down properly, after investigation I found out that the system had been rebooting several times an hours for the last 18 hours.

The system is a HP Proliant ML 150 G6 installed with Microsoft SBS 2008, with all updates.  Includes 3 x RAID disks and 10 GB Memory.

I have checked the following:
-Removed UPS system, just in case that was causing a power problem.
-Checked for minidump files (configured correctly but none produced)
-Unplugged from network and disconnected all external devices (except monitor, keyboard)
-Checked for recently upgraded antivirus or OS updates: none
-Swapped the redundant Power supplies.
-No new software installed recently

But cannot find out what is causing the continuous reboots.  The reboots don't happen all the time, the system will boot into SBS and work for sometimes 30-40 minutes but then it will reboot.

The server handles emails, so I need it to be online ASAP but cannot figure out what is causing the problem.  The only thing I can think of is a hardware problem.

Any suggestions? Or ways of testing?
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stefan1977
Asked:
stefan1977
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1 Solution
 
Rob WilliamsCommented:
There isn't another SBS server on your network is there? With SBS 2003, if there second SBS on the same network one will reboot automatically after 7 days, or 21 days if the extension patch was added. Not sure if 2008 does the same.
Was this a migration to SBS 2008?

Most often though it is due to faulty hardware or bad drivers.
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DavidCommented:
You need to figure out if it is hardware or software, (or interoperability).   The easiest thing to test is hardware.
 - Run full memory diagnostics
 - Look at windows event log, you would think it is logging something it doesn't like if it is rebooting.
 - tell hardware not to automatically reboot on failure, and look at crash dump.
 - Look at BIOS / event log there (could be simple like fan on motherboard failed so CPU getting too hot)

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vAdminCommented:
Does it displays any message stating that it is going to reboot or it just suddenly restarts?
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stefan1977Author Commented:
Thanks for your replies and in answer to your questions.

-This is a complete new install of SBS 2008 and is the only server OS on the network.
- I have looked through the system log and cannot see anything which suggest it is causing the reboot.  Within the system properties, I have deselected automatically reboot but it is still doing so.
- Unless I am looking in the wrong place, I cannot find any crash dump files (i.e. c:\windows\minidump)
- I will check out the bios
- re Reboot - the system just restarts without warning.

It's really puzzling me (and annoying me since everyone is back to work tomorrow).  For it to start happening whilst nothing had been changed (no user had accessed the server on the day it started happening), to me it suggests hardware.  I will run a full memory test and check the bios log.
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Rob WilliamsCommented:
I had a similar issue a year ago with an 8 week old HP. I ended up calling HP and they were very helpful diagnosing the problem and sent out a replacement motherboard and processor within 24 hours. In my case they couldn't determin if it was the processor or buss connecting the processor so they sent both. Perhaps worth a call to them to see if they can help isolate. You should be under warranty and at least have 5x8 support.
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vAdminCommented:
No message at all, like your system is shutting down?
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stefan1977Author Commented:
No message or BSOD, just like the reset button had been pressed on the server.
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vAdminCommented:
It could be the CPU fan, see if you can run any diagnostic cd
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Rob WilliamsCommented:
If it is an HP server you should have the option at boot to run the HP Insight Diagnostics, though this may have been removed if you manually installed SBS2008. If that is the case there should also be a bootable  HP Insight Diagnostics CD provided with the server. This will run many diagnostics such as raid, RAM, processor, fan, and other tests.
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DavidCommented:
An easy thing to do is unplug the SATA connector to the disk drive (so it still draws power, but no I/O goes to it), then boot the computer to any old CDROM you have, type something on the machine before you go to bed, and see if it is still there.

If the system reboots, you'll know, and you'll also know it is NOT the O/S, so you can start looking at memory, PCI cards, etc.
If system stays online, then it is unlikely it is memory, but swap the memory boards to mix things up a bit and try same the next evening.  This technique lets the hardware somewhat diagnose itself while you sleep.
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stefan1977Author Commented:
Looking at the bios log allowed me to see which part was failing.  This then allowed me to fix the problem that was causing the reboots.
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Indy_AdminCommented:
I am having similar problems.  What was your final verdict?
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dandnetCommented:
stefan1997, I am having the same issue.  If you are still a member, could you please advise us as to what you did to correct it?

Thanks!
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