News Samsung unveils sixth-generation V-NAND flash

Discussion in 'Article Discussion' started by bit-tech, 6 Aug 2019.

  1. bit-tech

    bit-tech Supreme Overlord Lover of bit-tech Administrator

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    bit-tech, 6 Aug 2019
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  2. Spraduke

    Spraduke Lurker

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    I've lost track somewhere down the line. Is this the same as MLC, TLC etc (and therefore capacity is traded off against speed/endurance) or is this simply stacking more MLC, TLC into layers?
     
    Spraduke, 6 Aug 2019
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  3. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    The latter, though there is also a speed/endurance issue once the stacks start getting high enough - which is why Samsung's crowing about having gone 136 layers high without breaking owt.
     
    Gareth Halfacree, 6 Aug 2019
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  4. ModSquid

    ModSquid Modder

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    I'm lost as well. Isn't three bits per cell still TLC? And why is their initial launch still only 250GB?

    It also winds me up that the double layer/bit/whatever cells are called Multi. Two isn't "many".
     
    ModSquid, 20 Aug 2019
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  5. edzieba

    edzieba Virtual Realist

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    Number of bits per cell, and number layers per die, are two completely unrelated factors. Car analogy! Number of seats per vehicle, and number of stories in the multi-story car-park.

    The use in a 250GB SSD is probably because you can just stick one package (8x stacked 258gb dies in one encapsulation) plus the controller on a tiny board and have a full 250GB SSD, maximising the number of discrete drives you can sell if you are constrained by NAND output volume.
     
    edzieba, 20 Aug 2019
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