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  1. #1
    Thailand Expat harrybarracuda's Avatar
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    A warning about purchasing large disks or NAS

    Cheeky robbing bastards.

    Storage vendors, including but reportedly not limited to Western Digital, have quietly begun shipping SMR (Shingled Magnetic Recording) disks in place of earlier CMR (Conventional Magnetic Recording) disks.

    SMR is a technology that allows vendors to eke out higher storage densities, netting more TB capacity on the same number of platters—or fewer platters, for the same amount of TB.

    Until recently, the technology has only been seen in very large disks, which were typically clearly marked as "archival". In addition to higher capacities, SMR is associated with much lower random I/O performance than CMR disks offer.

    https://arstechnica.com/gadgets/2020/04/caveat-emptor-smr-disks-are-being-submarined-into-unexpected-channels/

  2. #2
    Thailand Expat

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    From that link the CMR HDD is cheaper anyways !!

  3. #3
    disturbance in the Turnip baldrick's Avatar
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    NAS is not really about random io

    should be using SSDs for random io and your NAS for file storage with a decent FS that does not valve bits all over like flung pollige

  4. #4
    ความรู้ลึกลับ HuangLao's Avatar
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    The end is near....

  5. #5
    or TizYou?
    TizMe's Avatar
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    WD Red capacities 2TB-6TB currently employ device-managed shingled magnetic recording (DMSMR) to maximize areal density and capacity. WD Red 8-14TB drives use conventional magnetic recording (CMR).
    I'd read that earlier when I was buying NAS (about 6 months ago).

    At the time I purchased, the 8TB drives were the best value TB per $ anyway.
    Not sure if that has changed since then.

  6. #6
    Thailand Expat harrybarracuda's Avatar
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    Quote Originally Posted by TizMe View Post
    I'd read that earlier when I was buying NAS (about 6 months ago).

    At the time I purchased, the 8TB drives were the best value TB per $ anyway.
    Not sure if that has changed since then.
    Of course it depends what you are using storage for.

    From that link the CMR HDD is cheaper anyways !!
    Which means bigger margins.

    Which is probably why they didn't try to hard to point out the difference.

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