The default host type is used by the storage array when hosts are initially connected. It defines how the controllers in the storage array work with the host's operating system when volumes are accessed. You can change the host type if there is a need to change how the storage array operates, relative to the hosts that are connected to it.
Generally, you will change the default host type before you connect hosts to the storage array or when you connect additional hosts.
Keep these guidelines in mind:
For example, if you are connecting eight different hosts to the storage array, and six of those hosts are running a Windows operating system, you must select Windows as the default host operating system type.
For example, if you are connecting eight different hosts to the storage array, and two of those hosts are running a Windows operating system, three are running a VMware operating system, and another three are running a Linux operating system, you must select Factory Default as the default host operating system type.