Aidan Finn, IT Pro

Microsoft issued another clustering update for Windows Server 2008 R2.  This one is where:

The Cluster service still uses the default regroup time-out value of 6 seconds after you configure the regroup time-out setting on a computer that is running Windows Server 2008 R2. This time-out value may not be long enough for some cluster nodes to rejoin a large scale cluster after you restart the Cluster service.
Note To obtain the time-out value (ClusSvcRegroupOpeningTimeout), type the following command at a command prompt, and then press Enter:

cluster /prop

Microsoft says you can fix this by Installing the available hotfix.

After you install the following hotfix package, the following regroup settings become effective:

• ClusSvcRegroupOpeningTimeout
• ClusSvcRegroupPruningTimeout
• ClusSvcRegroupStageTimeout
• ClusSvcRegroupTickInMilliseconds

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This blog post is the property of Aidan Finn (@joe_elway / http://www.aidanfinn.com) and may not be reused in any manner without prior consent of Aidan Finn. You may quote one paragraph from this blog post if you link to the original blog post.

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2. KB2575625 – W2008 R2 Cluster Starts Failover After 80 Seconds When You Shutdown Active Node
3. KB2727972–W2008 R2 Cluster Node Crashes When You Restart A Node
4. Videos on WS2012 Failover Clustering and Storage Improvements