No error message is observed in event viewer.
Dtrace for the StorageServer during its startup contains:
(StorageServer) <7204> EV:H The Enterprise Vault .NET Server Manager component isn't registered.|(HKEY_CLASSES_ROOT\KVS.EnterpriseVault.SystemServerManager)
The HKEY_CLASSES_ROOT\KVS.EnterpriseVault.SystemServerManager registry is missing from the EV server.

The .NET component can be registered by following these steps:
1. Stop the Enterprise Vault Services on the affected server.
2. Open a CMD with administrator privileges.
3. Run the following command - "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" /tlb /codebase /verbose "C:\Program Files (x86)\Enterprise Vault\KVS.EnterpriseVault.ServerManager.dll"
4. Start the Enterprise Vault Services