storage matrixes associated with storage and retrieval systems and methods are provided to automate the process of handling a mixed inventory of palletized and containerized items . in one embodiment , the storage matrix comprises a storage matrix comprising a plurality of stationary cell modules and a plurality of carriers . the outer row cell modules comprise a plurality of motors configured to move the respective carrier bi - directionally within the storage matrix and is also configured to stabilize the respective carrier when the carrier is moving or at a stationary position . the inner row cell modules comprise at least one motor configured to move the respective carriers uni - directionally within the storage matrix and also comprises at least one ferrous metal plate configured to stabilize the respective carrier when the carrier is moving or at a stationary position .