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# Upgrade a SQL Server Failover Cluster Instance
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[!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] supports upgrading a [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] failover cluster to a new version of [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)], to a new [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] service pack or cumulative update, or when installing to a new Windows service pack or cumulative update separately on all failover cluster nodes, with downtime limited to a single manual failover (or two manual failovers if failing back to the original primary).
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Upgrading the Windows operating system of a failover cluster is not supported for operating systems before [!INCLUDE[winblue-server-2-md](../../../includes/winblue-server-2-md.md)]. To upgrade a cluster node running on [!INCLUDE[winblue-server-2-md](../../../includes/winblue-server-2-md.md)], see [Perform a rolling upgrade or update](#perform-a-rolling-upgrade-or-update).
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Upgrading the Windows operating system of a failover cluster is not supported for operating systems before [!INCLUDE[winblue-server-2-md](../../../includes/winblue-server-2-md.md)]. To upgrade a cluster node running on [!INCLUDE[winblue-server-2-md](../../../includes/winblue-server-2-md.md)] or above, see [Perform a rolling upgrade or update](#perform-a-rolling-upgrade-or-update).
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Support details are as follows:
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-[!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] upgrade is supported both through the user interface and from the command prompt. You can run upgrade from the command prompt on each failover cluster node, or by using the [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] setup UI to upgrade each cluster node. For more information, see [Upgrade a SQL Server Failover Cluster Instance (Setup)](../../../sql-server/failover-clusters/windows/upgrade-a-sql-server-failover-cluster-instance-setup.md) and [Install SQL Server 2016 from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md).
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-[!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] upgrade is supported both through the user interface and from the command prompt. You can run upgrade from the command prompt on each failover cluster node, or by using the [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] setup UI to upgrade each cluster node. For more information, see [Upgrade a SQL Server Failover Cluster Instance (Setup)](../../../sql-server/failover-clusters/windows/upgrade-a-sql-server-failover-cluster-instance-setup.md) and [Install SQL Server from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md).
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- The following scenarios are not supported as part of a [!INCLUDE[ssNoVersion](../../../includes/ssnoversion-md.md)] upgrade:
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This process results in downtime limited to one failover time and database upgrade script execution time during the whole failover cluster upgrade.
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To control the failover behavior of cluster nodes during the upgrade process, run the upgrade operation at the command prompt and use the /FAILOVERCLUSTERROLLOWNERSHIP parameter. For more information, see [Install SQL Server 2016 from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md).
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To control the failover behavior of cluster nodes during the upgrade process, run the upgrade operation at the command prompt and use the /FAILOVERCLUSTERROLLOWNERSHIP parameter. For more information, see [Install SQL Server from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md).
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## Next steps
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[Upgrade SQL Server Using the Installation Wizard (Setup)](../../../database-engine/install-windows/upgrade-sql-server-using-the-installation-wizard-setup.md)
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[Install SQL Server 2016 from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md)
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[Install SQL Server from the Command Prompt](../../../database-engine/install-windows/install-sql-server-2016-from-the-command-prompt.md)
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[Upgrade a SQL Server Failover Cluster Instance (Setup)](../../../sql-server/failover-clusters/windows/upgrade-a-sql-server-failover-cluster-instance-setup.md)
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