When adding an iSCSI identifier to an initiator group, which identifier should be used?

The correct choice for adding an iSCSI identifier to an initiator group is the Software Initiator iSCSI Qualified Name (IQN). The IQN is a globally unique identifier for iSCSI initiators, ensuring that the iSCSI devices can be correctly recognized and authenticated in a network environment.

Using the IQN allows for seamless connections between the iSCSI initiator and the storage target, enabling effective communication and data transfer. The structure of the IQN typically includes a prefix that designates it as an iSCSI name, followed by the organization's domain name (in reverse) and a unique identifier, which helps to avoid conflicts.

In contrast, the other identifier types are not suitable for this purpose. The Physical Device Identifier (PDI) is more relevant for hardware identification rather than network storage protocols. The Logical Volume Name (LVN) refers to logical volumes in storage management and doesn't pertain to initiator groups. The Connection Identifier (Conn ID) is used to manage specific connections and sessions but does not serve as an identifier for initiator groups in the context of iSCSI. Therefore, the Software Initiator IQN is essential for correctly configuring initiator groups in an iSCSI environment.