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Server 2012 R2 Standard: Becomes Unresponisve Every Two Weeks

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  • Server 2012 R2 Standard: Becomes Unresponisve Every Two Weeks

    I hope someone has encountered the same or similar issues.
    Server: DELL T620 1 Year Old, Hyper-V Host, hosts two Guest Server 2012 R2 servers. Guest 1: Active Directory, File Server, DNS Server, DHCP Server | Guest 2: Exchange Server 2013, 130 mailboxes.
    Last updates installed 4 weeks ago. This issue has been happening long before the last patches where installed.
    Host Server Config
    Processor: 2 x Intel Xeon E5-2620 ... Memory: 63.9 GB
    Last reboot: Nov 06, 2015
    OS: Windows Server 2012 R2
    OS Drives: Mirrored
    Data Drive 8 X 460Gb SAS drives @ 150000 Raid 5

    Users will complain they cannot save their files. File access is terminated. RDP Access is impossible. Hyper-V Manager can't connect to server. Server is completely unresponsive except it responds to ping. Display through Hyper V Manager seems frozen. Only way to get this Active Directory Guest out of this state is to forcibly use Hyper V and Power Off the server. Upon boot up, it prompts why the server was shut down unexpectedly. On investigating the server Event Viewer, logging stopped at exactly the time the server became unresponsive and started logging again after the server reboot. I have nothing else to work with except these symptoms. Only other thing worthy of noting is it happens like very two weeks give or take and further the last relevant information in the logs are a ntds.dit online defrag was completed a few hours prior to the problem.

    Anyone with similar experiences.

    Thanks for your feedback.

  • #2
    Is it only the single guest? Does it have integration services deployed? can you break your disk infrastructure down further, ie what raid controller, are all the guests on a single R5 volume?
    When you refer to the mirrored drives, do you mean for the host?
    What else is installed the on the DC, any antivirus, backup software, other programs? have you trawled through logs other than application/system?

    How much time have you spent on it, have you considered just rebuilding the guest?

    time frames, is it always consistent, is it random? do you have backups ending, either in the guest or the host? is it consistent on a given day, or a given time?
    Last edited by tehcamel; 3rd December 2015, 09:58.
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    • #3
      Also, have you used the Dell Server Administrator (or iDRAC), to view the state of the system. Check the state of the RAID card and the drives. Is the RAID card firmware up to date?
      A recent poll suggests that 6 out of 7 dwarfs are not happy