Hotfixes that were rolled-up to 976932 — Windows 7 and Windows Server 2008 R2 Service Pack 1 (SP1)

• 974930 — An application or service that queries information about a failover cluster by using the WMI provider may experience low performance or a time-out exception
• 976571 — Stability update for Windows Server 2008 R2 Failover Print Clusters
• 978001 — Cluster resources do not automatically fail over to another node when you disconnect the private and public network interfaces in a Windows Server 2008 failover cluster or in a Windows Server 2008 R2 failover cluster
• 978562 — The "Validate Multiple Arbitration" test on a Windows Server 2008 R2-based failover cluster may incorrectly fail
• 979782 — An update rollup package for the Validate a Configuration Wizard of the Failover Clustering feature is available for Windows Server 2008 R2
• 2277439 — The Cluster service stops responding if you run backup applications in parallel in Windows Server 2008 R2
• 2294255 — MS10-086: Vulnerability in Windows shared cluster disks could allow tampering
• 2353832 — Authentication requests between nodes in the same failover cluster may be unable to use the Kerberos protocol if the Negotiate SSP is specified in Windows Server 2008 R2
• 2353808 — The WINS replication operation fails on a failover cluster node that is running Windows Server 2008 R2

Hotfixes that were released after Windows 7 and Windows Server 2008 R2 Service Pack 1 (applicable to both SP0 and SP1 systems)

• 2446607 — You cannot enable BitLocker on a disk volume in Windows Server 2008 R2 if the computer is a failover cluster node
• 2462576 — The NFS share cannot be brought online in Windows Server 2008 R2 when you try to create the NFS share as a cluster resource on a third-party storage disk
• 2485543 — You cannot access or mount a Windows Server 2008 R2-based NFS share after a failover if the NFS share uses Krb5 or Krb5i authentication
• 2494016 — Stop error 0x0000007a occurs on a virtual machine that is running on a Windows Server 2008 R2-based failover cluster with a cluster shared volume, and the state of the CSV is switched to redirected access
• 2494036 — A hotfix is available to let you configure a cluster node that does not have quorum votes in Windows Server 2008 and in Windows Server 2008 R2
• 2494162 — The Cluster service stops unexpectedly on a Windows Server 2008 R2 failover cluster node when you perform multiple backup operations in parallel on a cluster shared volume
• 2496034 — Cluster service stops when an error occurs in the registry replication process of a failover cluster in Windows Server 2008 R2 or in Windows Server 2008
• 2512715 — Validate Operating System Installation Option test may identify Windows Server 2008 R2 Server Core installation type incorrectly in Windows 7 or in Windows Server 2008 R2
• 2520235 — "0x0000009E" Stop error when you add an extra storage disk to a failover cluster in Windows Server 2008 R2
• 2531907 — Validate SCSI Device Vital Product Data (VPD) test fails after you install Windows Server 2008 R2 SP1    
• 2549448 — Cluster service still uses the default time-out value after you configure the regroup time-out setting in Windows Server 2008 R2
• 2549472 — Cluster node cannot rejoin the cluster after the node is restarted or removed from the cluster in Windows Server 2008 R2
• 2550886 — A transient communication failure causes a Windows Server 2008 R2 failover cluster to stop working
• 2550894 — Cluster service leaks memory when the service handles state change notifications in Windows Server 2008 R2 or Windows Server 2008
• 2552040 — A Windows Server 2008 R2 failover cluster loses quorum when an asymmetric communication failure occurs
• 2575625 — Cluster service initiates a failover after a delay of about 80 seconds when you shutdown the active node in Windows Server 2008 R2
• 2578113 — The Cluster service takes about 30 seconds to fail over IPv6 IP addresses in Windows Server 2008 R2
• 2579052 — New registration entries are added to the Persistent Reservation table when the physical disk resource that is associated with the CSV is taken offline on a Windows Server 2008 R2-based Failover Cluster
• 2580360 — A heap memory leak occurs when an application or service queries the MSCluster_Resource WMI class in Windows Server 2008 R2
• 2606025 — "0x000000D5" Stop error on a failover cluster node that has special pool enabled and that is running Windows Server 2008 R2
• 2648385 — You cannot use WMI to manage CSV resources in Windows Server 2008 R2
• 2637197 — CSV LUNs fail if you use a VSS hardware provider to back up virtual machines on a Windows Server 2008 R2-based cluster
• 2616514 — Cluster service sends unnecessary registry key change notifications among cluster nodes in Windows Server 2008 or in Windows Server 2008 R2
• 2652013 — Some anti-affined groups fail over unexpectedly when you rejoin a node in a Windows Server 2008 R2 failover cluster
• 2673129 — Slow shutdown time for a cluster node in a Windows Server 2008 R2-based cluster
• 2674551 — Redirected mode is enabled unexpectedly in a Cluster Shared Volume when you are running a third-party application in a Windows Server 2008 R2-based cluster
• 2687646 — A LUN that is registered to a cluster shared volume is invisible and inaccessible in a Windows Server 2008 R2
• 2685891 — CAP does not come online in a Windows Server 2008 R2-based failover cluster
• 2687741 — A hotfix that improves the performance of the "AlwaysOn Availability Group" feature in SQL Server 2012 is available for Windows Server 2008 R2

See Also

• List of Failover Cluster Packages Updated After the Release of Windows Server 2008 R2 Service Pack 1 (SP1)