This read-only display string (up to 255 characters) gives the physical hardware location, on complex multi-SBB systems only, for a correctable memory error, returning NULL if the location cannot be determined or does not apply. On a blade or multi-node chassis this tells an admin exactly which physical server bay contains the flaky DIMM rather than just knowing something in the enclosure is affected. On a single-node tower server this field typically returns NULL since location tracking does not apply there.