Seagate launches HDD that perform asSATA SSD and capacity of up to 18TB

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, Nov 23, 2022.

  1. user1

    user1 Ancient Guru

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    it does have some advantages, mainly magnetic storage appears that it will continue to scale for a long time (beyond 100tb per drive), where as nandflash doesn't shrink well, hence the die stacking, and increasing the number of bits per cell, despite loss of performance ,data integrity and endurance.

    Its possible if not likely that nand will hit a development wall before spinning rust, may already be seeing this in effect since most modern ssds use an SLC cache + dram cache to compensate for the loss of performance and endurance of tlc and qlc memory, and without a serious breakthrough it will continue to get worse if they increase the number of bits per cell , since you can only add so many layers before cost starts to increase prohibitively.
     
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  2. Glottiz

    Glottiz Master Guru

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    Not fair to compare SSD capacity that is physically 1/5th size of HDD brick. Also, it was already proven beyond any doubt that SSD reliability is much better than HDD (look at Blackblaze reliability data).

    [​IMG]
     
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  3. user1

    user1 Ancient Guru

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    I didn't say anything about reliability, reliability of individual drives is different from what I said about data integrity and endurance of the technology itself as density increases.

    edit: thought i would add the reason why they can't be treated the same way, is because individual drives have over provisioning and wear leveling, error correction to compensate for low write endurance/data integrity. so in this way they can be both reliable at a drive level , and the technology itself can have low endurance/data integrity, as compared to older flash technology. With the direction given, if they add more bits per cell to increase density, it will decrease data integrity and write endurance further, if they increase the number of layers, there will a point where the cost per gb goes up, die shrinks will provide some extra density but it doesn't scale as well as logic, so the increases in density will be meager.
     
    Last edited: Nov 26, 2022
  4. cucaulay malkin

    cucaulay malkin Ancient Guru

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    depends on how full the drive is.
     

  5. Corrupt^

    Corrupt^ Ancient Guru

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    That's a use case I hadn't thought of yet. Basically if you have enough write/read speed to use the bandwidth you can use it. Though in my case, having only 1 NAS, I'm now limited by the read/write speed of the disks :(

    It's also an el-cheapo solution that I have, I used a USB 2.5 Gbit NIC on a DS918+:
    https://github.com/bb-qq/r8152

    Using the CLUB 3D CAC-1420.
     

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