Samsung Electronics Co., Ltd.

Yeong-kyun Lee

Jong-yun Yun

Cheol Kwon

In-bo Shim

Gyu-taek Kim

A secondary memory device includes a substrate configured to receive power from an external power source, at least one of non-volatile memory devices mounted on the substrate, a control device mounted on the substrate to control the non-volatile memory devices, and a secondary battery electrically connected to the substrate and configured to supply second power to the substrate when a power supply from the external power source is abnormally stopped.

Secondary memory device and electronic system employing the same

A method and apparatus for controlling movement of a transducer to limit its stopping time at a certain position of a disk regardless of whether the disk drive performs a read/write operation, an etching or clustering effect of a lube layer coated on the disk is prevented, thereby preventing performance degradation of the disk drive. The method including (a) determining whether the transducer is located in a data zone of a disk at a predetermined period of time; (b) if the transducer is located in the data zone of the disk based on the result of step (a), determining whether a command accompanied by a disk access is executed; and (c) if the command accompanied by a disk access is executed based on the result of operation (b), waiting until the execution of the command accompanied by the disk access is finished and moving the transducer to a new track determined according to a predetermined algorithm, and if the command accompanied by a disk access is not executed based on the result of operation (b), immediately moving the transducer to a new track determined according to the predetermined algorithm.

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Hwaseong-si, South Korea

Yeong-kyun Lee