A migration plan is used to create a namespace for the destination file system based at least in part on a namespace of the source file system. Complete layers or thinner sub-layers of a-Si are formed by physical vapor deposition at low temperatures to prevent reaction with superconducting materials, then exposed to fluorine. Stroke detectors are used to control motor drivingly connected to the drive member after being activated to initiate raising or lowering of the seat. One method includes rotating a two-dimensional LIDAR device along an axis of rotation that is substantially normal to a ground plane beneath the vehicle, capturing data points of objects within the environment surrounding the LIDAR device, and generating a three-dimensional representation of the objects based on the data points.