All I/O will temporarily be queued until a path to the volume is reestablished.

Question

Hi, An error appeared on one of our servers, screenshot in attachment, tell me what the problem might be? How to open a case with Microsoft support ?5120.jpg

Answer 1

This is a common error message that indicates a problem with the Cluster Shared Volume (CSV) on a Windows Server Failover Cluster. It means that the CSV is not accessible from one or more cluster nodes due to an I/O device error. Some possible causes of this error are:

• A faulty or loose cable connection between the cluster node and the storage device¹
• A misconfigured or outdated VSS hardware provider from the storage vendor²
• A network or communication failure between the cluster nodes and the storage device³
• A disk or NTFS failure on the coordinating node of the CSV³

To troubleshoot this error, you can try the following steps:

• Check the physical connection and the status of the storage device and make sure it is online and healthy¹
• Update the VSS hardware provider from the storage vendor and restart the cluster service on the affected node²
• Verify the network configuration and the iSCSI MPIO settings on the cluster nodes and make sure they are consistent and functional³
• Run a disk check and a file system check on the coordinating node of the CSV and fix any errors³

If the error persists, you may need to contact your storage vendor or Microsoft support for further assistance.

Answer 2

Dear Admin,

Hope you're doing well.

Based on your description, please refer to the follow:

What is CSV Auto pause?

When CSVFS switches itself to the Draining state because it has observed a failure from Disk or SMB, we refer to that as CSVFS “Autopauses”. This indicates that the volume has automatically put itself in a recovery state. For instance, when a user invokes an action to move a physical disk resource from one cluster node to another, then CSV volume also will be put in Draining state. But in this case it does it because of an explicit administrative action and the volume is not considered to be in an Autopause in this case.

CSV auto pauses when it receives any failure from Direct IO or Block Redirected IO with a few exceptions like STATUS_INVALID_USER_BUFFER, STATUS_CANCELLED, STATUS_DEVICE_DATA_ERROR or STATUS_VOLMGR_PACK_CONFIG_OFFLINE, which indicate either user error or that storage is misconfigured. In both cases there is no value in trying to abstract the failure in CSV because as soon as the IO is retried it will get the same error.

How to open a ticket with Microsoft Support?

If you want to seek for the root cause, you can go to the Microsoft Customer Service Center to open a Premier-level case so that with their permission level and resource, Microsoft could provide you with better help on your request.

Best Regards,

Ian Xue

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Answer 3

Hey,

As mentioned, the error you are facing is related to lost connection to your storage. You should check that your storage is available and connected properly to cluster node. Might help:
https://www.dell.com/support/kbdoc/en-us/000138971/cluster-storage-loses-access-to-cluster-shared-volumes

https://systemcenter.wiki/?GetElement=Microsoft.Windows.10.0.Cluster.Shared.Volume.IO.is.paused&Type=Rule&ManagementPack=Microsoft.Windows.2016.Cluster.Management.Monitoring&Version=10.1.0.0

In addition, you can add redundancy on the storage layer. StarWind VSAN can be used to create replicated storage pool for Failover Cluster, which will allow you to increase uptime of the cluster. https://www.starwindsoftware.com/vsan

Cheers,

Alex Bykovskyi

StarWind Software

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