A disk drive enclosure may comprise a tray-less chassis comprising a backplane and defining an opening configured to receive a disk drive. A door may be coupled to the tray-less chassis and configured to enclose the disk drive within the opening when the door is closed. An elastomeric element may be configured to bias the disk drive against the backplane when the door is closed and may be further configured to provide damping so as to dissipate energy imparted to the tray-less chassis during the operation of the disk drive.