请问UTM LUNs是一个什么东西？

如题
Universal Access Luns (UTM LUNs) should not be assigned to
LUN ID 0, especially with RDAC's installed. Placing an
Universal Access Lun at LUN id 0, may lead to loss of LUN
recognition of next sequence LUN ids or partial list of
Virtual Luns reported with the RDAC driver. These UTM LUNs
should be assigned LUN ID 31.
不解，UTM LUNs是一个什么东西？

上面不是说了吗，全称叫Universal Acess Luns啊，这是一个特殊的Lun，用来做Inband management的，如果你不用inband management，可以不要mapping这个Lun到host