Windows hangs when accessing a Cluster Shared Volume

Windows Server 2008 R2 SP1 has a key feature in Clustering and Hyper-V called CSV (Cluster Shared Volume).

One day, we notice that we are experiencing hang issues when accessing the a CSV Volume.

The following events are logged into the cluster event log and the system log.

#1 – Cluster Shared Volume ‘Volume1’ (‘Cluster Disk 2’) is no longer available on this node because of ‘STATUS_CONNECTION_DISCONNECTED(c000020c)’. All I/O will temporarily be queued until a path to the volume is reestablished.

#2 – Cluster Shared Volume ‘Volume1’ (‘Cluster Disk 2’) is no longer available on this node because of ‘STATUS_WAIT_0(0)’. All I/O will temporarily be queued until a path to the volume is reestablished.

#3 – Cluster Shared Volume ‘Volume1’ (‘Cluster Disk 2’) is no longer accessible from this cluster node because of error ‘ERROR_TIMEOUT(1460)’. Please troubleshoot this node’s connectivity to the storage device and network connectivity.

When these events happen, all the virtual machines on that volume hang and restart.

After a day of troubleshooting (forums, blogs, event logs) I have the following result : The problem occurs when accessing a CSV Volume from a non-coordinator node.

We suspected many culprits : DPM, VSS, CSV Networks…

Finally, the solution was in a hot-fix that we installed and the problem was gone.

Unfortunately, the time the issue was solved, i installed 4 hot-fixes:

KB2494016

KB2639032

KB2685891

KB2674551

I don’t know which update fixes the problem, but i suspect it’s the KB2639032

Wish that helps!