Failover Cluster Error "Two disks have been found on node that cannot be distinguished from one another"

manjesh kaushik 1 Reputation point
2021-04-11T10:06:00.003+00:00

WE have windows server 2012r2... 2 physical node sql server cluster. sudden both node restarted but now one node is up and second is down which is showing error as given below (when validate the report)

Two disks have been found on node ....... that cannot be distinguished from one another. The disks involved have disk signature ......, SCSI page 83h VPD descriptor ........, SCSI page 80h VPD Serial Number 80Bqc+Jxw5Fb. Please verify the storage configuration. You must either mask (unpresent, detach) one of these LUNs at this node,

Netapp Lun are connected to physical node via SAN Switch

Windows Server 2012
Windows Server 2012
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
1,526 questions
Windows Server Clustering
Windows Server Clustering
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
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  1. Yuhan Deng 3,761 Reputation points Microsoft Vendor
    2021-04-12T07:40:58.907+00:00

    Hi,

    You can try running a validation report and see what exactly the problem is:

    In failover cluster manager:
    86831-image.png

    When it’s done, view report:
    86720-image.png

    If there’s any validation problem, it should be shown.

    Please also check the disk signature and see if there’s any conflict:
    86841-image.png

    If there is, you might need to contact the disk supplier.

    Thanks for your time,

    Best regards,

    Danny

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