To avoid scanning all ESX servers in a cluster when unmounting snapshots, use a standalone ESX server to mount a snapshot.
To mount a hardware snapshot to a proxy ESX server that is part of a VMware cluster, configure the nClusterMount additional setting on the Virtual Server Agent proxy to ensure that snapshots are properly unmounted when the operation is completed. All ESX servers in the cluster are scanned when unmounting snapshots.
Note
The nClusterMount additional setting is valid for V11 but might not be found using the Lookup option. You can enter this additional setting manually with the following parameters: Name = nClusterMount; Category = VirtualServer; Type = Integer; Value = 1. If you see a warning that the setting is not valid for the current release, click Yes to continue, then make sure that the Value is set to 1 before saving the results.