In Veritas Operations Manager, to discover the array information on the enclosures using the Storage Insight Add-on, you need to designate a managed host as the discovery host. The discovery host must have vendor-specific array management tools installed on it.
Ideally, you must configure two managed hosts as the discovery hosts. You can designate the first managed host as your primary discovery host, and the second managed host as secondary discovery host. The secondary discovery host acts as a backup if the primary discovery host faults. The primary and the secondary discovery hosts must have the same operating system type. For example, you cannot mix Windows hosts and the non-Windows hosts. Secondly, the primary and the secondary discovery hosts must have storage management CLI installed in the same directory tree.