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Saturday, 2 June 2012

Quorum log too small

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine the size of the quorum log configured for the cluster:


If the Exchange Server Analyzer finds the value for MaxQuorumLogSize less than 4194304 decimal (0x400000 hexadecimal), a warning is displayed.

The MaxQuorumLogSize registry value represents the currently configured value for the Reset quorum log at cluster quorum parameter. This warning is generated if the MaxQuorumLogSize is less than 4096 kilobytes (KB).

The cluster records all changes to the cluster database in the quorum log file. When the quorum log attains the specified size, the cluster saves the database and resets the log file. On Microsoft Windows® 2000 Server-based clusters, the default quorum size limit is 64 KB. On Windows Server™ 2003-based clusters, the default quorum size limit is 4096 KB. For Exchange Server clusters, it is recommended that the Reset quorum log at property be configured to 4096 KB. This ensures that there will be sufficient space to hold the cluster configuration information, such as which servers are part of the cluster, what resources are installed in the cluster, and what state those resources are in (for example, online or offline).
To correct this warning

1. Open Cluster Administrator.
2. In the left pane, right-click the object that represents the cluster, and then click Properties.
3. On the Quorum tab, configure Reset quorum log at with a value of 4096.
4. Click OK to save the changes.

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