Michael Vargo | Senior Support Escalation Engineer
Some customers are experiencing failures on Windows Server 2012 Hyper-V hosts that utilize Cluster Shared Volumes (CSVs) when backing up virtual machines (VM’s) using System Center 2012 Data Protection Manager (DPM 2012) with Service Pack 1 (SP1) or later.
When this occurs the following error is logged on the Hyper-V hosts.
Log Name: System
Event ID: 5120
Details: Cluster Shared Volume 'Volume2' ('ClusterStorage Volume 2') is no longer available on this node because of 'STATUS_CLUSTER_CSV_AUTO_PAUSE_ERROR(c0130021)'. All I/O will temporarily be queued until a path to the volume is reestablished.
You may also see the VM’s pause temporarily, go in to a paused state, shut down, see memory spikes or CSV go into a failed state on the Hyper-V hosts. Configuring serialized backups doesn't help the problem.
It has been determined that any backup product using shadow copies results in the same errors, thus this isn't necessarily a DPM 2012 issue.
The Windows and DPM teams have released a series of fixes to address some general Cluster, CSV backup and DPM issues and are now available for download.
KB2886362 – Hotfix for System Center 2012 SP1 Data Protection Manager (http://www.microsoft.com/en-us/download/details.aspx?id=40318)
NOTE The above fix requires a prerequisite fix: 2836751 – Description of Update Rollup 3 for System Center 2012 Service Pack 1 (http://support.microsoft.com/kb/2836751/EN-US)
KB2878635 – Update is available that improves the resiliency of the cloud service provider in Windows Server 2012: December 2013 (http://support.microsoft.com/kb/2878635/EN-US)
Also see KB2784261 – Recommended hotfixes and updates for Windows Server 2012-based Failover Clusters (http://support.microsoft.com/kb/2784261/EN-US)
Michael Vargo | Senior Support Escalation Engineer | Microsoft GBS Management and Security Division
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