You can map a to a when you create a volume or a volume group. You can also map the host at a different time.
Attention:
Possible loss of data access – In some cases, the host operating system does not support mapping a base volume and the associated snapshot volume to the
same host, host group, or node in a cluster. Map a snapshot volume to a single separate host instead.
Map now – The most convenient way to map a volume to a host is to do so when you create a volume. If the host is not available, you
must map the host at a different time.
Map at a different time – You must map at a different time if the host that you want to map to is not available, not listed, or connected to the
storage array after you have created the volume.