Skip to main content
NetApp Knowledge Base

Windows cluster disks online but can not read

Last Updated:

Applies to

  • Microsoft Hyper-V
  • Windows Server Failover Clustering (WSFC)
  • Cluster Shared Volume (CSV)


Periodically virtual machines (VM) go offline and the Hyper-V host cluster services can not access the CSV where the VM resides. The LUN/Disk is online in windows disk management.
Windows error log example:
  • Event ID 1135
  • Cluster validation reports
Node abc holds the SCSI PR on Disk 3 and brought the disk x online, but failed in its attempt to read and validate file data on partition table entry 1. The group or resource is not in the correct state to perform the requested operation.
Node abc file Cluster_Validation_TempFile_Diskx_{xyz}.txt, failure: The group or resource is not in the correct state to perform the requested operation

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.