• 0 Posts
  • 20 Comments
Joined 1 year ago
cake
Cake day: June 25th, 2023

help-circle
  • Unfortunately what’s shipping today seems it would offer maybe half that.

    For the batteries that were announced this past week, a larger-than-refrigerator-sized cabinet held a capacity of around 15kWh.

    Around half the energy density by mass of Lithium batteries, and in the order of a sixth of the density by volume.

    Now if only we could come up with a system where your car could be charged while stopped at traffic lights, we might be onto a winner (:

    Considering however that the price of sodium is around 1-2% that of lithium, I expect we will see significant R&D and those numbers quickly start to improve.




  • To expand on @doeknius_gloek’s comment, those categories usually directly correlate to a range of DWPD (endurance) figures. I’m most familiar with buying servers from Dell, but other brands are pretty similar.

    Usually, the split is something like this:

    • Read-intensive (RI): 0.8 - 1.2 DWPD (commonly used for file servers and the likes, where data is relatively static)
    • Mixed-use (MU): 3 - 5 DWPD (normal for databases or cache servers, where data is changing relatively frequently)
    • Write-intensive (WI): ≥10 DPWD (for massive databases, heavily-used write cache devices like ZFS ZIL/SLOG devices, that sort of thing)

    (Consumer SSDs frequently have endurances only in the 0.1 - 0.3 DWPD range for comparison, and I’ve seen as low as 0.05)

    You’ll also find these tiers roughly line up with the SSDs that expose different capacities while having the same amount of flash inside; where a consumer drive would be 512GB, an enterprise RI would be 480GB, and a MU/WI only 400GB. Similarly 1TB/960GB/800GB, 2TB/1.92TB/1.6TB, etc.

    If you only get a TBW figure, just divide by the capacity and the length of the warranty. For instance a 1.92TB 1DWPD with 5y warranty might list 3.5PBW.



  • qupada@kbin.socialtoTechnology@lemmy.ml*Permanently Deleted*
    link
    fedilink
    arrow-up
    11
    arrow-down
    1
    ·
    8 months ago

    Except that they’ve ruined that too. You now need an account to view anything, so the reach of announcements is greatly diminished.

    At this point leaving shouldn’t really be too difficult, since a large portion of your audience already has; because they’ve been shut out, or have quit voluntarily.




  • As of USB-PD 3.1 there are now nine fixed voltages - 5, 9, 12, 15, 20, 28, 36, and 48V - and two variable-voltage modes; PPS with 3.3 - 21V in 0.02V increments, and AVS with 15 - 48V in 0.1V increments.

    Combined with a few different current limits, some of these features being optional, and then doubling down with what your cable does or doesn’t support, amazing anything gets charged at all.











  • I’ve always been lambasted for this opinion, but I feel the same way about the charging cable and charger.

    I do not want yet another 1 metre (if they’re even that, most likely 3 foot) USB-C cable that barely reaches from the charger on the floor to the bedside table - and largely precludes actually using the phone while in bed - nor particularly the included charger. So many things need to be plugged in these days that single-output chargers are also basically e-waste.

    Of course because some business genius had the idea that making the USB cable 0.9 instead of 1.8m saved them $0.06 per unit shipped, we all got lumped with those useless cables.

    Now of course there will always be people for whom it’s their first phone (or whatever situation), who do need those accessories. But all that requires is there to be a retail bundle with the now-accessory charger and cable. Preferably that bundle costs the same as the phone with them included does today and you get a token discount for the phone without them, although we all know it would never work that way :(