• TDK still pushing the boundaries of disk density

    Devin Coldewey

    Devin Coldewey is a Seattle-based writer and photographer. He has written for the TechCrunch network since 2007. Some posts he’d like you to read: The Dangers of Externalizing Knowledge | Generation i | Surveillant Society | Choose Two | Frame Wars | The User’s Manifesto | Our Great Sin His personal website is coldewey.cc. → Learn More

    Wednesday, October 1st, 2008


    I love that the technology TDK has used to increase maximum disk density to 803 gigabits per square inch is called “Tunneling Magneto-Resistance” and its replacement “Current-Perpendicular-to-Plane Giant Magneto-Resistance.” Man, those sound like stuff you buy for your ship in Escape Velocity.

    The precision and force necessary to reliably etch magnetic information into smaller and smaller scales, increasing HDD capacity, is approaching the “not worth it” level, while solid state memory is a younger technology, meaning improvements are comparatively easier (theoretically). TDK is still throwing money at the former, however, being one of the kings of storage tech. Besides the head of the research facility where the Gb/in² record was broken sees a terabit/in² happening with the old TMR tech, suggesting there’s still a fair amount of life left in the spinning disk industry. [awesome pictures of HDD stuff from Data Clinic]

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