Abstract: A hard disk drive with a housing having a base plate and a cover plate. A spindle motor is installed on the base plate. A disk is installed on the spindle motor to store data. An actuator has a magnetic head to record and reproduce data on the disk, is installed on the base plate, and is pivoted by a voice coil motor. A printed circuit board is installed on a bottom surface of the base plate. A through hole, where servo track information is recorded on a recording surface of the disk, is positioned in the base plate, and a hole cover made of a metal plate exhibiting an electric conductivity and covering the through hole, is attached to the bottom surface of the base plate to block an electromagnetic wave generated by the printed circuit board from being transferred to the inside of the housing.

Abstract: A method, apparatus, and medium including computer readable code for controlling a hard disc drive. The method includes receiving a write instruction and sensing a temperature around the hard disc drive, enabling a write verify function when the sensed temperature is below a threshold temperature and recording data in a data sector of a disc, reading the recorded data and detecting a recording error, and recording data in a reserved sector of the disc when the recording error is detected. When the recording error is detected while recording data on a magnetic disc in a low temperature mode, then a cycle of recording, reproducing, and error detecting can be repeated several times. Since a sector is reassigned, if an error is detected, and the data is recorded on that reassigned sector, recording and reproducing data to/from a disc can be carried out more reliably at low temperatures.