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Quorum Drive Configuration Information
Article ID: 280345 - View products that this article applies to.
This article was previously published under Q280345
This article provides information about configuring the quorum drive.
When you install Microsoft Cluster service, you must configure storage at the hardware level so that the operating system and Cluster service have two separate physical devices for cluster usage. For example, in Disk Administrator or Disk Management, the following disks should be displayed:
NTFS architecture is structured to enable file attribute indexing on a disk volume. This functionality enables the file system to efficiently locate files that match certain criteria so that sorting and searching processes function faster. However, you should not place any input/output (I/O) intensive programs on your quorum drive. Heavy input/output traffic from another source could interfere with the cluster's ability to write to the disk, which may cause the quorum resource to fail. If the quorum resource fails, the entire cluster may fail as well.
It is recommended that you configure the quorum disk size to be 500 MB; this size is the minimum required for an efficient NTFS partition. Larger disk sizes are allowable but are not currently needed. It is also recommended that you configure some form of fault tolerance at the hardware level to be used for the quorum drive, such as hardware mirroring or hardware RAID. If the quorum drive is lost, the cluster may not be available.
The quorum resource plays a crucial role in the operation of the cluster. In every cluster, a single resource is designated as the quorum resource. A quorum resource can be any resource with the following functionality:
For additional information about MNS, click the following article number to view the article in the Microsoft Knowledge Base:
838612NOTE: Changes in future releases of Cluster service may require a larger quorum disk size. Therefore, the recommended quorum disk size may be modified in future releases of the product.
(http://support.microsoft.com/kb/838612/ )TechNet Support Webcast: Majority Node Set support in Microsoft Windows Server 2003 Cluster
For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/251284/ )Cluster Server cannot start if the Quorum disk space is full
(http://support.microsoft.com/kb/245762/ )Recovering from a lost or corrupted Quorum log
(http://support.microsoft.com/kb/168948/ )Information about the Cluster group
Article ID: 280345 - Last Review: March 1, 2007 - Revision: 3.3