Hello,

Hyper-V

Server 2008 R2

8 Node Cluster

ISCSI Storage

We needed to perform some maintenance on several of our Hyper-V hosts, each requiring a reboot. Before rebooting we made sure all the VMs had been moved off, as well as changing the CSV owner to another node.

For some reason, when these hosts were rebooted, several of the other hosts in the cluster lost connection to some of their CSV volumes causing a number of VMs on these hosts to crash.

As a result of this we have been left with a number of CSVs being stuck in redirected mode.

Is there a way to establish which hosts are redirecting their traffic over this network?

As far as I can see, all the hosts ISCSI connections are established and there doesnt appear to be any storage connection issues, so Im not sure why they're still in redirected mode.  Also, no backups are being done.

Has anyone experienced this issue before?  When this initial problem occurred we saw the following cluster events being logged

Cluster Shared Volume 'Volume6' ('Cluster Disk 6') 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

It seems the problems were are having are very similar to this post

http://social.technet.microsoft.com/Forums/windowsserver/en-US/a3a1643e-c61d-40c9-8653-292fecfd008b/hyperv-cluster-statusconnectiondisconnectedc000020c?forum=winserverhyperv

• Edited by PM-12 21 minutes ago