SQL SERVER- Unable to Failover AlwaysOn Availability Group to Disaster Recovery Site

One of my clients took my assistance to deploy Always On availability group. After few months, they added a Disaster Recovery node to windows cluster and availability group also. Later, they contacted me that they are not able to move availability group to DR node. They were getting an error like below in event viewer.

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SQL SERVER – Don’t Ignore Warning: Cluster Resource DLL Update Restart Check

This was one of the hard lessons learned, so I am sharing with blog readers. This is about an error in cluster resource DLL. 

While applying the patch to SQL instance, I cluster, sometimes we get warning “Cluster Resource DLL Update Restart Check.” If we check Detail.txt file in setup logs, we will find below.

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SQL SERVER – Unable to Connect to SQL Server in Azure Virtual Machine from SSMS on On-Premise Machine

From past few months, I am seeing a few of my client moving their development workload to Cloud. When I asked the reason, it was mostly cost reduction in terms of hardware lifetime, licensing and connectivity advantage and their developer can work from anywhere. In this blog post, we will learn about how to fix error related to Azure Virtual Machine. 

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SQL SERVER – Script Level Upgrade for Database ‘master’ Failed Because Upgrade Step ‘sqlagent100_msdb_upgrade.sql’ – Error: 5041: MODIFY FILE Failed

I have helped many clients in upgrade failures via my On-Demand consulting and I am amazed to see various ways which can break SQL Server upgrade. In this blog we would learn about fixing error Script level upgrade for database ‘master’ failed because upgrade step ‘sqlagent100_msdb_upgrade.sql’

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