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Joined 1 year ago
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Cake day: June 15th, 2023

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  • I have an inch-high stack of platters now. Kind of interesting to see how their thickness has changed over the years, including a color change in there somewhere. Keep thinking I should bury them in epoxy on some table top.

    For extra fun, you ca melt the casings and cast interesting shapes. I only wish I were smart enough to repurpose the spindle motors.





  • Traditionally, RAID-0 “stripes” data across exactly 2 disks, writing half the data to each, trying to get twice the I/O speed out of disks that are much slower than the data bus. This also has the effect of looking like one disk twice the size of either physical disk, but if either disk fails, you lose the whole array. RAID-1 “mirrors” data across multiple identical disks, writing exactly the same data to all of them, again higher I/O performance, but providing redundancy instead of size. RAID-5 is like an extension of RAID-0 or a combination of -0 and -1, writing data across multiple disks, with an extra ‘parity’ disk for error correction. It requires (n) identical-sized disks but gives you storage capacity of (n-1), and allows you to rebuild the array in case any one disk fails. Any of these look to the filesystem like a single disk.

    As @ahto@feddit.de says, none of those matter for TrueNAS. Technically, trueNAS creates “JBOD” - just a bunch of disks - and uses the file system to combine all those separate disks into one logical structure. From the user perspective, these all look exactly the same, but ZFS allows for much more complicated distributions of data and more diverse sizes of physical disks.




  • The first kind of bankruptcy, Elon & his Saudi bros keep the company, and the banks lose like 50-90% of their loans.

    The second kind of bankruptcy, the banks get all the servers and office chairs and sell them to either a new data-mining company or a recycler. This isn’t very likely, because most of the value of Xitter is all the people who keep visiting, regardless of whether Elon knows how to monetize them.




  • You’re right. I got my current (smallish) car with the explanation that I could just rent a truck when I want to haul hobby materials, but the practical inconvenience of that rental has meant that I just don’t, and consequently haven’t done any big hobby projects in years. When I imagine renting an EV booster battery, I imagine it being easy, convenient, and reasonably priced, unlike literally everything else in the automotive market.

    And there is different emotional content in using your own vehicle vs any alternative.


  • I don’t want to buy the oversized battery, and I don’t really want to buy the on-board generator/charger of PHEV. I only want to own as much vehicle, and incur the manufacturing carbon debt, to meet 95-98% of my needs. Make it easy to rent, borrow, or share the extra capacity for the last 2%, and the world will be a lot less wasteful. I can see renting a trailer with enough generator to replace a series hybrid. I can see renting surplus battery. And those rental services can be a revenue stream to replace dealerships lost service centers.

    Clearly, though, I’m a minority of consumers, and no manufacturer actually wants to cater to me and my twelve friends.




  • Infrastructure for distributing the air once it gets to the settlement is one thing. At least for now, though, Earth is the only place to get oxygen in life-sustaining quantities, which is the single source they’re talking about.

    Maybe you can posit harvesting oxygen from mineral oxides, hydrolyzing water if you can find it, or capturing an ice asteroid. Whether you split every atom of oxygen you breathe out of rust or lift them out of earth’s gravity, let alone doing both for redundancy, it’s orders of magnitude more energy and complexity than growing potatoes in Antarctica.





  • Back in the day, you weren’t allowed to plug a private phone into AT&T’s network. You had to rent phones from Ma Bell, for something like $10/month, back when $10 would fill a gas tank.

    Between that and Columbia Music Club, so when Netflix was still sending DVDs in the mail, I decided I’d rather buy one movie a month than rent 4. Ripping them wasn’t so easy in those days, but there was already library organizers. Now, it’s like 20 years later and I’ve got something like 250 movies I can watch any time. Mostly good ones, now spread over four different streamers, if they’re even out there. Plenty to keep me entertained.

    It’s a corollary of Pratchett/Vimes “boots theory.” More expensive to buy stuff, and the first few years you go without a lot, but in the long run, you get enough for less.