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GeoCluster requirements

Make sure your cluster meets the Core Double-Take requirements, as well as the following requirements specific to GeoCluster protection.

Operating system—The operating systems are limited to the Windows Standard (2012 only), Enterprise, and Datacenter editions listed in the Core Double-Take requirements.
Hardware—Microsoft support for MSCS and MSCS-based Microsoft applications requires that the cluster configuration appear on the Microsoft Hardware Compatibility List under category Cluster.
Cluster Network Name—Double-Take does not handle dynamic changes to the cluster network names, the names assigned to the routes for network traffic. If a network name is changed for a network that is used by Double-Take, the GeoCluster Replicated Disk resource must be taken offline, the resource's network property must be changed, and then the resource must be brought back online.
Disk queuing—The Double-Take disk queue, configured during installation, should use a local volume for each node in the cluster.
Anti-virus software—You should configure your anti-virus software to delete or quarantine viruses because cleaning them can cause an access denied retrying operation error. Additionally, configuring virus software to scan outgoing traffic will lessen performance impacts.

Supported upgrade configurations—Before upgrading be sure and read the Installation notes and review the proper procedure for upgrading Double-Take on a cluster.

Upgrade Configuration	Supported	Not Supported
Upgrade 5.3 GeoCluster Replicated Disk Resource to 7.0 GeoCluster Replicated Disk Resource	X
Upgrade 6.0 GeoCluster Replicated Disk Resource to 7.0 GeoCluster Replicated Disk Resource	X