Recommended hotfixes and updates for Windows Server 2008 R2-based server clusters

This article describes the hotfixes and updates that we recommend that you install on each node of a Windows Server 2008 R2-based failover cluster. When you update your Windows Server 2008 R2-based failover cluster, you help reduce downtime. You also help decrease the number of errors, failed print jobs, and other support issues that you experience.

Note We recommend that you evaluate these hotfixes and updates to determine whether they might resolve problems in your environment. If you determine that cluster nodes that are in your environment may be affected by the problems that an update or hotfix addresses, install the hotfix or update on each cluster node that is in your environment.

Use the information in the "More information" section to help you determine whether a particular hotfix or update applies to the server cluster. Before you install a particular hotfix or update, we recommend that you review the original Microsoft Knowledge Base (KB) article that describes that hotfix or update.

We recommend that you install Service Pack 1 since it has many fixes that fix problems with Windows Clustering and the hotfixes referenced in 2545685 (http://support.microsoft.com/kb/2545685) . If for any reason you cannot immediately apply Service Pack 1,  we recommend you install the following Windows Server 2008 R2 hotfixes, depending on your environment:

General hotfixes

We recommend that you install the following hotfixes if you plan to install the failover clustering feature on Windows Server 2008 R2 Core:

• 978309 (http://support.microsoft.com/kb/978309/) IPv6 transition technologies, such as ISATAP, 6to4 and Teredo do not work on a computer that is running Windows Server 2008 R2 Server Core

To avoid problems affecting cluster operation when the network is unreliable, we recommend that you install the following fix:

2552040 (http://support.microsoft.com/kb/2552040) A Windows Server 2008 R2 failover cluster loses quorum when an asymmetric communication failure occursResource-specific hotfixes

To avoid show performance of the cluster and possible system crashes, we recommend you install the following fix:

2520235 (http://support.microsoft.com/kb/2520235) "0x0000009E" Stop error when you add an extra storage disk to a failover cluster in Windows Server 2008 R2

Resource-specific hotfixes

We recommend that you install the following hotfixes, depending on the resources that are running on the server cluster. You do not have to install these hotfixes if you are not running these resources on the server cluster.

• 976571  (http://support.microsoft.com/kb/976571/ ) Stability update for Windows Server 2008 R2 Failover Print Clusters