Hello dear gurus,
We have a critical cluster with Windows Server 2008 R2 SP1 on board and a SQL clustered instance installed there with SQL Server 2008 R2 SP1. Since a maintenance window is very short we are going to upgrade this instance till SQL Server 2008 R2 SP3. Besides that change should be implemented very soon by a customer's demand. The only problem is that the operating system (OS) has never been patched. Could you please advise if there are really critical OS patches without which a SQL Server instance will not work after the upgrade? And if there are some what OS patches should be installed first?
Thank you for replies in advance.
