The --list --device action lists the attributes of devices, including device path, size, host name and ASM disk group name.
If only an ASM disk group name is specified, the action lists all the devices that have been added to the ASM disk group.
If only a host name is specified, the action lists all the devices created from the targets on the host.
If both an ASM disk group name and a host name are specified, the action lists a single device created from the target on the host and that has been added to the ASM disk group.
If neither an ASM disk group name nor a host name is specified, the action lists all quorum disk devices.