metadata about that LUN resides on the "original" SP, simply trespassing the LUN to another SP and changing the owner does not move that metadata.
I know EMC recommends that once a Lun is created, we must not manually change its ownership. If we want that Lun on other SP's ownership, then we must migrate it from old lun to a new lun which has desired ownership. Does any one know why does EMC not recommend changing its ownership manually?
Changing Lun's Default onwership