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DPM 2012 Backing up my Hyper-V servers RRS feed

  • Question

  • I would have posted this to the Hyper-V forum but because the backups are also failing for the databases on the Hyper-V host I figured I would take a stab at posting this here.

    I have created backup routines for the Hyper-V servers and it's databases which when run never finish. No data seems to be backed up and the clock just runs for hours and days. No real errors are popping up on the host for VSS errors either. I end up having to cancel the job but even if I try to recreate the recover point, the job will run indefinitely and never backup anything. My host server is a Windows 2008 SP2 server and searching on the internet is seemingly fruitless for this issue.

    The only error I can get is from DPM which states that no valid recovery points exist and that I need to create them. But again, when I do, the job just runs for hours and days with no completion. Any help would be appreciated.

    Thanks,

    Wednesday, January 9, 2013 8:00 PM

All replies

  • Hi,

    Try disabling TCP Chimney on the Hyper-V hosts.

      Netsh int tcp set global chimney=disabled

    Also see if snapshots are getting created by running:  vssadmin list shadows


    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. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Wednesday, January 9, 2013 9:48 PM
    Moderator
  • Thanks for the reply. I disabled the TCP chimney and checked the snapshots of which there were none. After disabling the tcp chimney, do I need to restart any services or reboot the server to have the changes take effect?
    Thursday, January 10, 2013 1:48 PM
  • Hi,

    Before DPM can transfer any data, a VSS snapshot has to be created and mounted.  So when you kick off a recovery point or CC job, within 2 minutes there should be a shadow copy listed when you run the vssadmin list shadows command.

    The DPMRACURR.ERRLOG on the protected server will detail the shadow copy creation and the provider used, the mount showing the shadopycopy## and the begin of the datamove.

    <snip<
    2020 0D28 01/10 05:00:19.982 31 vsssnapshotrequestor.cpp(585) [00000000049626A0]  NORMAL CVssSnapshotRequestor:: ProviderId:[{B5946137-7B9F-4925-AF80-51ABD60B20D5}], h/w provider:[0], volume:[\\?\Volume{0db1ace3-236a-11e0-a109-806e6f6e6963}\]
    2020 0D28 01/10 05:00:19.982 31 vssbaserequestor.cpp(1103) [00000000049626A0]  NORMAL CVssBaseRequestor::CheckWriterStatus [00000000049626A0]
    2020 2384 01/10 05:00:20.949 18 dsmsendersubtaskbase.cpp(47) [0000000000B8C670] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CDsmSenderSubTaskBase: constructor [0000000000B8C670] openovl[0000000000B8C7D8] msgovl[0000000000B8C8C8] closeovl[0000000000B8C820]
    2020 2384 01/10 05:00:20.949 31 backupsubtask.cpp(53) [00000000012DEEC0] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CBackupSubTask: constructor [00000000012DEEC0]
    2020 2384 01/10 05:00:20.949 31 basewriterhelperplugin.cpp(174) [00000000049672C0] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL SetSystemFlags(0)
    2020 2384 01/10 05:00:20.949 18 readeriterator.cpp(257) [000000000496AB20] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CFileReaderIterator::SetFileSystemFlags (0x1) called
    2020 2384 01/10 05:00:20.949 18 iteratorutils.cpp(637)  AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CaseSensitivity NOT enabled on the machine
    2020 2384 01/10 05:00:20.965 31 vsssnapshotrequestor.cpp(1071)  AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL ssLocalVolumeGuid = [\\?\Volume{0db1ace3-236a-11e0-a109-806e6f6e6963}\], ssClusterVolGuid=[\\?\Volume{0db1ace3-236a-11e0-a109-806e6f6e6963}\]
    2020 2384 01/10 05:00:20.996 31 filewriterhelperplugin.cpp(455) [00000000049672C0] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CFileWriterBackupHelper::GetIterator Adding read path \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy129\Temp [00000000049672C0]
    2020 2384 01/10 05:00:20.996 18 readeriterator.cpp(108) [000000000496AB20] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CFileReaderIterator:AddIncludeFiles(filepath:\\?\Volume{0db1ace3-236a-11e0-a109-806e6f6e6963}\Temp, filespec:*, snapshotpath:\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy129\Temp) called
    2020 2384 01/10 05:00:20.996 18 dsmsendersubtaskbase.cpp(625) [0000000000B8C670] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL Page size to be used: 4096
    2020 2384 01/10 05:00:20.996 18 dsmsendersubtaskbase.cpp(644) [0000000000B8C670] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL Failed to read MaxBufferSize from registry. Using default size: 262144
    2020 2384 01/10 05:00:20.996 31 backupsubtask.cpp(131) [00000000012DEEC0] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CBackupSubTask::TriggerDone [00000000012DEEC0]
    2020 2384 01/10 05:00:21.449 31 backupsubtask.cpp(518) [00000000012DEEC0] AA60DA7B-028E-422A-8CAC-2D25E4B96169 NORMAL CBackupSubTask::BeginDataMove [00000000012DEEC0]
    >snip<


    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. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Thursday, January 10, 2013 5:03 PM
    Moderator