Hi we have exchange 2007 std on win 2003 std 64bit HP server with 16GB RAM and ARCserver backup agent for backups We have a issue, our server hungs or freezes and we need to reboot from ILO or hard reboot There is no ping or RDP but when connect to ILO it shows server is ON we was thinking it a hardware issue so we called HP guys and they change mainboard on it, but still issue exists There is nothing in logs is there anyway we can set any special pogs or auditing to narrow down what the issue is? thanks for your help and answers.

1. At this stage it's difficult to know what the issue is. Also, as the server hangs or freezes it's more likey to be an issue outside of exch as you cant even ping the server. Could also be network issues. 2. I would start off by maybe posting in the Windows forum to ask about logging on the OS level. - http://social.technet.microsoft.com/Forums/en-US/category/windowsserver 3. You can run the exch BPA to make sure nothing major is wrong with exch but I'd go to the windows forum first.Sukh

Before replacing the hardware, I would remove all third-party software from the box, especially ArcServe and any antivirus products and see if it stops locking up.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Thanks Sukh and Crowley, its just ARC server and McAfee is installed on it. I will give a try toexch BPA as it is might not be possible to remove softwares on it

You may never find the cause then.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Ed is right, if you don't give a try then you won't find a cause. You should try it on Weekend. Gulab | MCITP: Exchange 2010-2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.Blogspot.com

I could give a try to remove the software's, but the problem is intermittent, so even if I remove the software on weekend and it might happen there is no problem on that weekend. As the server hungs or reboots not at any specific time or day, its just random

So I guess you have decided not to remove the third party! How long its been happening? Do you see anything in the event log when server reboots? Gulab | MCITP: Exchange 2010-2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.Blogspot.com

Usually, a server can appear to hang in the situations of insufficient system resources, high CPU usage, high disk usage, deadlock in kernel mode or key system processes, or hardware problem. First we may enable Performance Monitor to check. It is more related to Windows server performance issue than an Exchange server issue. And you may try the following methods to troubleshoot this issue: 1. Try a cleanboot instead of unstall the anti-virus application to isolate the fault from software; How to configure Windows XP to start in a "clean boot" state http://support.microsoft.com/kb/310353 How to perform advanced clean-boot troubleshooting in Windows XP http://support.microsoft.com/kb/316434 2. Enable the performance monitor to collect log. For more information, you may want to submit a new thread in Server forums since this is an Exchange forum. http://social.technet.microsoft.com/Forums/en/category/windowsserver/ hope it is useful. Best regards, Fiona Liao Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Thanks for your responses guys we have 2 cpu with 4 cores each and 16GB RAM, and only 300 mailboxes, so I guess good enough hardware resourses and given 25GB virtual memory on seperate disk, but still its always shows about 13 GB PF usage in task manager we are using 1 hdd on same exchange server to store users archives as well, 1 strange thing I found is almost everyday C drive is getting full, don't know which folder or file is getting written, is it some temporary files or something else? C drive is about 2-3 GB free only, I tried to clean up stuff and freed upto 6 GB but today again its 1.6GB free Is it when we run ARCserve backup it writes some temporary files?