When a drive does idle garbage collection, instead of reading, modifying, and writing a cell on the spot, it just marks the location of the old data as available to write in the future and writes the good data to an empty spot on another cell. Then, when the drive is not doing anything, it goes through its backlog of invalid data and cleans up those locations. Usually, drives prioritize cells with the most invalid data, and will move the valid data around until it's in a reasonably compressed state (idle garbage collection is similar in this way to defragmenting HDDs) and works until a certain percentage of the drive is free space. … [Read more...] about Ask Ars: Of solid state drives and garbage collection
Solid snake oil
Nikon’s first foray into the mid-range mirrorless market, the Z50 proves a strong debut. Despite the smaller APS-C sensor, Nikon hasn’t tried to shrink the Z50 too much, instead paying great attention to form and handling. The result is a mirrorless camera that, though still more compact than a DSLR, packs a generous grip which is lovely to hold. Its high-resolution viewfinder and tilting touchscreen are impressive, while 4K video and reliable autofocus (using the same hybrid system as the Nikon Z6) complete a great value package. The Z50 uses SD cards rather than the more expensive XQD format, though the single slot is only compatible with slower UHS-I cards, which limits its continuous shooting speeds. Perhaps the biggest challenge the Z50 faces is the limited native lens range, but this will surely grow – and the twin-lens kit is a versatile buy. For those looking to move from a Nikon DSLR to mirrorless, the Z50 is a great choice. … [Read more...] about Best mirrorless camera 2020: the 12 best models on the planet
Sony’s Alpha cameras have long been popular with vloggers, and the A6400 is no exception. 4K is a given, while support for S-log3 and S-log2 should please post-producers. There’s 4K HDR (HLG) for instant playback and Sony’s Imaging Edge Mobile app makes it possible to transfer video to your smartphone. Front-on framing is straightforward, too, thanks to a flip-up 16:9 touchscreen, while the A6400’s advanced autofocus system serves up superb subject tracking. Port options, though, will put some vloggers off: as with the 6300 before it, there’s a microphone input but no headphone socket on the A6400. Many won’t monitor audio as they record, but it’s worth noting if interviews are your thing. There’s no in-body image stabilization either, and many of Sony’s prime lenses don’t feature it – not a problem if you use a tripod or go for that handheld aesthetic. … [Read more...] about Best cameras for vlogging 2020: 11 great choices for video creators
Scientists have long seen carbon capture and sequester, or CCS, as a potentially significant way to combat climate change. The idea is that storing CO2 emissions underground would prevent the greenhouse gas from entering the atmosphere, but previous efforts have made little progress. Most experiments involve pumping CO2 into sandstone or deep aquifers, though there are concerns that the gas could eventually escape and reenter the atmosphere — whether through human error or seismic activity. … [Read more...] about Scientists turn carbon dioxide into stone to combat global warming
07-13-2020 05:50 AM Probably not really *needed* but boy will it be dead handy, the 10 minutes charging is from 0-100% which most people hardly ever do anyway, it will probably mean that most people will be able to charge once or twice a day for a few minutes, no overnight charging needed, it will probably make wireless charging a little redundant too, makes it convenient for the people who swear by keeping their... … [Read more...] about 125W charging is coming — what do you think about that?