A data storage system assembly includes a rigid central plate with multiple data storage devices (DSDs) mounted on the central plate, where a first row of DSDs is coupled with a first side of the central plate, and a second row of DSDs is coupled with a second side of the central plate, both in a side-by-side arrangement. A plurality of flexible mounting grommets may be fastened to each DSD and coupled to the central plate, such as in an arrangement in which an even number of grommets are fastened to one side and an odd number of grommets are fastened to an opposing side of the DSD. Each respective DSD may be fastened to a corresponding adaptor plate, where each adaptor plate is coupled with the central plate. Flexible mounting grommets may be fastened to each adaptor plate and coupled to the central plate.