title

Upgrade a SQL Server Failover Cluster | Microsoft Docs

ms.custom

ms.date

06/13/2017

ms.prod

sql-server-2014

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ms.technology

high-availability

ms.topic

conceptual

helpviewer_keywords

upgrading failover clusters

clusters [SQL Server], upgrading

failover clustering [SQL Server], upgrading

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daac41fe-7d0b-4f14-84c2-62952ad8cbfa

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MashaMSFT

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mathoma

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craigg

Upgrade a SQL Server Failover Cluster

[!INCLUDEssNoVersion] supports upgrade of the [!INCLUDEssDE] and [!INCLUDEssASnoversion] from [!INCLUDEssVersion2005], [!INCLUDEssKatmai], [!INCLUDEssKilimanjaro], and [!INCLUDEssSQL11] failover clusters separately on all failover cluster nodes.

Support details are as follows:

Upgrade is supported both through the user interface and from the command prompt. For more information, see Upgrade a SQL Server Failover Cluster Instance (Setup) and Install SQL Server 2014 from the Command Prompt.
Upgrading from [!INCLUDEssKilimanjaro] - You can run upgrade from the command prompt on each failover cluster node, or by using the Setup UI to upgrade each cluster node. If Full-text search and Replication features do not exist on the instance being upgraded, they will be installed automatically with no option to omit them.
Service pack installation - you must apply [!INCLUDEssNoVersion] service packs and patches to [!INCLUDEssSQL11] failover clusters separately on all nodes.
The following scenarios are not supported:
- You cannot migrate from a stand-alone instance of [!INCLUDEssNoVersion] to a failover cluster.
- Add features to a failover cluster. For example, you cannot add the [!INCLUDEssDE] to an existing [!INCLUDEssASnoversion]-only failover cluster.
- You cannot downgrade a failover cluster node to a stand-alone instance.
For more information, see AlwaysOn Failover Cluster Instances (SQL Server).

Upgrading a [!INCLUDEssNoVersion] Multi-Subnet Failover Cluster

You cannot directly upgrade a non-multi-subnet [!INCLUDEssNoVersion] failover cluster to a [!INCLUDEssNoVersion] multi-subnet failover cluster. For more information, see Upgrade a SQL Server Failover Cluster Instance (Setup).