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Memory Systems by David Wang, Spencer Ng, Bruce Jacob

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CHAPTER 25

Advanced Topics

The preceding chapters on disks cover the fundamentals of today’s disk drives. In this chapter, some more advanced topics will be discussed. These are new concepts and approaches that are significantly different from current methods of doing things. As such, they are above and beyond simply making evolutionary improvements over current technologies. While no attempt is made to create an exhaustive list of all such topics, the topics selected here are deemed to be important for the reader to be aware of. The topics run the gamut from fundamental magnetic recording physics (perpendicular recording), to recording media (patterned media), to heads (thermally assisted recording), to servo (dual stage actuator), to data ...

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