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Server 2008 Cluster Fail-over Errors

HI Team

Can you please provide some guidance around the following:

the weekend I had to patch some server 2008 clustered servers, on one of the nodes we got the below error:


Ownership of cluster disk 'Cluster Disk 8' has been unexpectedly lost by this node. Run the Validate a Configuration wizard to check your storage configuration.
Cluster resource 'Cluster Disk 8' in clustered service or application 'IGMSCLU3006B' failed.

Due to the above, one of the SQL instances was not available for about 1 hour between 8h15-9h15am,

The business owner wants to understand what the cause of these issues/errors was and prevent them from happening again, can you please assist me with coming up with something plausible to explain to them?

I've attached the cluster events for time period the issue started,
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craigleenz
Asked:
craigleenz
2 Solutions
 
Vitor MontalvãoMSSQL Senior EngineerCommented:
The business owner wants to understand what the cause of these issues/errors was and prevent them from happening again
This might be a network issue or something related to your storage solution. How many disks the cluster has? Only one got the issue?
Do you have a network and a storage team? If so, contact them and request more info on this issue.
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Vitor MontalvãoMSSQL Senior EngineerCommented:
Just added more topics to call Experts in other areas to help.
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Eugene ZCommented:
you may need to check clustered server health - maintenance -- > run cluster validation; maybe need to install new drivers
see
Event ID 1038 is logged when a failover occurs on a back-end disk controller in a Windows Server 2008 failover cluster
https://support.microsoft.com/en-us/kb/972797

you may need to open support Case with Microsoft as well
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Vladislav KaraievSolutions ArchitectCommented:
The error you received means that Failover Cluster was not able to access the underlying storage of the "Cluster Disk 8".

This can be caused by your storage subsystem failure or a network disconnection. If the "Cluster Disk 8" is located on the same physical storage as other cluster disks, this means that the network is fine and something gone bad on the physical side of your SAN (service hang, disk failure, RAID rebuild, firmware failure).

What storage solution do you use?
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craigleenzAuthor Commented:
thanks guys, raised with M$, hopefully I get something plausible back
also engaged our storage team who manages this disk to comment on any potential issues
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