The present invention relates to a process for converting a tertiary OH group of an organic compound into a tertiary Cl group of the organic compound by using a solvent selected from the group comprising toluene, o-xylene, m-xylene, p-xylene and mixtures thereof, and thionyl chloride as the chlorinating agent. A system includes a common memory module configured to store a plurality of entries, ones of the entries being defined by a string of bits. The process can also include cutting the object to obtain a portion having a face, wherein cutting is performed such that the portion includes parts of different pieces within the plurality of pieces. The adjusting signal is produced based upon a comparison between the primary signals the reference signals. The antenna system may also include two or more retractable antennas, a light source attached to the antenna, a control mechanism used to determine antenna functionality based on the positioning of the antenna, and the retractable antenna may be connected modular portion of the communication card. Methods for forming such hard disk drives and hard disk drive rack assemblies comprising the hard disk drives are also disclosed.