According to one embodiment, a drive mounting system includes a drive chassis having a first wall and a second wall transverse to the first wall. A third wall is supported in the chassis and movable between a first position opposite the first wall and a second position opposite the second wall. A drive is mounted in the chassis in a first orientation supported by the first and third walls in response to the third wall being in the first position, and the drive is movable to a second orientation, transverse to the first orientation, supported by the second and third walls in response to the third wall being in the second position.