1. Illustration of how hard disk drive work, 3D animated chart, project partially sponsored by Seagate, 2020. (Link), previous HDD with stepper motor (Link), illustration of HDD VCM magnet from manufacture (Link).
2. Illustration of previous HDD with stepping motor (Link), and current products with VCM over the past couple of decades (Link1, Link2).
3. VCM structure for HDD (Link), illustration image from Yue Ming, Yin Xiaowen, Liu Weiqiang, Lu Qingmei, “Progress in recycling of Nd–Fe–B sintered magnet wastes”, Chinese Physics Letter (Link).
4. PM image and example: HDD PM aspect ratio. Examples of PM size and shape utilized in current HDD products, images from current HDD VCM magnet supplier (Link).
5. M. Taktak-Mezioul, A. Chemori, J. Ghommam and N. Derbel, Mechatronics of hard disk drives: Rise feedback track following control of a R/W head, In: Mechatronics: Principles, Technologies and Applications (2015, Link).