I was trying to create a failover cluster in Windows Server 2012 R2 (Creating a Windows Server 2012 R2 Failover Cluster using StarWind iSCSI SAN v8) and I ran the “Validate Configuration…”. Once validation was complete, the validation report gave me the Error:
Two disks have been found on node node1 that cannot be distinguished from one another. The disks involved have disk signature <Signature>, SCSI page 83h VPD descriptor <GUID>, SCSI page 80h VPD Serial Number <Serial Number>. Please verify the storage configuration. You must either mask (unpresent, detach) one of these LUNs at this node, or, run validation and specify a disk list that includes only one of these disks, for example by using the Test-Cluster cmdlet in Windows PowerShell
After searching all over, I finally found an article that pointed me in the right direction:
Windows Server 2012 / 2008R2 with iSCSI error 80 or 83 VPD[http://culmor.blogspot.com/2013/03/windows-server-2012-2008r2-with-iscsi.html]
This article didn’t have my fix, but it did state that “The error probably relates to your MPIO configuration”. That’s when I found two listings in my iSCSI Initiator’s Favorite Targets screen. I removed one of the listings and bam!…Error gone.
The issue for me turned out to be that I had multiple virtual adapters (vNICs) that pointed to the SAN provider. By removing one of them, it removed the duplicate SAN devices.
PowerView vs. PowerPivot vs. Power BI…not to mention PowerPivot Models, Power BI Sites, Power Query, Power Map, Pivot Tables, Pivot Charts, Data Analysis Expressions (DAX) Language, Natural Language Search…
OK, I am lost!
Then I find out that some of these are in Excel 2010/2013, some are Add-Ins to Excel 2010/2013, some are in SQL Server Reporting Services 2012, some are in SharePoint 2010/2013, some will only work in SharePoint 2013, some are only in Office 365…ahh
What the hell Microsoft!!!
Finally an article that explains this in understandable terms…