qupada @ qupada @kbin.social

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2 yr. ago

Single-sided drives can be up to 4TB though, no?

Yes and no.

The original 2015 release (10240) has support from 2015 - 2025. The latest 2021 release (19044) 2021 - 2032.

The product as a whole has around 16.5 years of support from go to woah, but each individual release is supported for 10 - 11.

https://learn.microsoft.com/en-us/windows/iot/iot-enterprise/whats-new/release-history#windows-iot-enterprise-ltsc

Free for personal use, so yes-ish. That'll certainly be a deal-breaker for some.

Realistically, people who are using it for personal use would probably be upgrading to the next LTS shortly after it's released (or in Ubuntu fashion, once the xxxx.yy.1 release is out). People who don't qualify to be using it for free anyway are more likely to be the ones keeping the same version for 5 years.

To note: this appears to be a move from 5 years (standard, free) + 5 years (extended, paid) to 5+7. Users not paying Canonical aren't getting anything different as to with prior LTS releases.

Standard free support for 24.04 is still 2024-04 through 2029-06.

https://ubuntu.com/about/release-cycle

https://wiki.ubuntu.com/Releases

There definitely are vendors ignoring common sense and putting socket SP5 on desktop boards.

No argument about the price, I think list on these is something like $13k USD.

Their top-of-the-range Epyc 9684X has 1152MB :)

See, and raise KDE Neon.

Ubuntu LTS base, but with up-to-date upstream KDE releases rather than the (typically) relatively ancient releases that Kubuntu has.

Really is the best of both worlds.

It was linked a little up thread, but since you're (probably) referring to the "Space-cadet" keyboard, it was seven.

Technically, they drew a distinction between the "shift" keys (of which there were three), and the other modifiers (four).

In modern times (or for Linux at least), Meta has essentially coalesced with Alt, so the modifiers we've retained are Control, Alt, and Super (Windows), with only "Hyper" having been lost along the way.

The remaining two shifts (also lost to time) were "Top" (symbols) and "Front" (Greek), with the Greek supporting combining with shift (there's a table on that Wiki page).

I bought one of the really sturdy kind (weighs about 40kg / 88lb). Uprights are solid 100mm/4" rounds of pine, none of that hollow cardboard tube nonsense.

My XL-sized void loves to haul arse into the room and leap right from the ground to the top level (around 1.6m / 5'3" from the floor), which makes the thing rock side to side fairly precariously. He hasn't knocked it over yet, but some day I'm sure he'll come in too hot.

p is stored in the balls...

I was going to write a rebuttal. And then I decided that the "zero points" speech from Billy Madison will suffice.

https://www.youtube.com/watch?v=LQCU36pkH7c

Specs look good for the price, and those machine work great with Linux (I'm using Ubuntu 22.04 on the slightly earlier 9310 right now).

The only slight downside of the 9315 is that the SSD is soldered to the motherboard. Make sure you back up your data regularly, because there might be no way to get anything off the machine if it breaks.

There's also something of a lack of IO; just one USB-C on each side (which is nice, because you can plug the charger into either side). But I have no issues with Bluetooth headphones, and monitors with USB-C have always worked great for plugging larger numbers of peripherals in.

The phrase "cutting off your nose to spite your face" comes to mind.

Not in so much detail, but it's also really hard to define unless you've one specific metric you're trying to hit.

Aside from the included power/cooling costs, we're not (overly) constrained by space in our own datacentre so there's no strict requirement for minimising the physical space other than for our own gratification. With HDD capacities steadily rising, as older systems are retired the total possible storage space increases accordingly..

The performance of the disk system when adequately provisioned with RAM and SSD cache is honestly pretty good too, and assuming the cache tiers are adequate to hold the working set across the entire storage fleet (you could never have just one multi-petabyte system) the abysmal performance of HDDs really doesn't come into it (filesystems like ZFS coalesce random writes into periodic sequential writes, and sequential performance is... adequate).

Not mentioned too is the support costs - which typically start in the range of 10-15% of the hardware price per year - do eventually have an upward curve. For one brand we use, the per-terabyte cost bottoms out at 7 years of ownership then starts to increase again as yearly support costs for older hardware also rise. But you always have the option to pay the inflated price and keep it, if you're not ready to replace.

And again with the QLC, you're paying for density more than you are for performance. On every fair metric you can imagine aside from the TB/RU density - latency, throughput/capacity, capacity/watt, capacity/dollar - there are a few tens of percent in it at most.

Being in an HPC-adjacent field, can confirm.

Looking forward to LTO10, which ought to be not far away.

The majority of what we've got our eye on for FY '24 are SSD systems, and I expect in '25 it'll be everything.

There's some space occupied by the servo tracks (which align the heads to the tap) in LTO, but if we ignore that...

Current-generation LTO9 has 1035m of 12.65mm wide tape, for 18TB of storage. That's approximately 13.1m², or just under 1.4TB/m².

A 90 minute audio cassette has around 90m of 6.4mm wide tape, or 0.576m². At the same density it could potentially hold 825GB.

DDS (which was data tape in a similar form factor) achieved 160GB in 2009, although there's a lot more tape in one of those cartridges (153m).

Honestly, you'd be better off using the LTO. Because they're single-reel cartridges (the 2nd is inside the drive), they can pack a lot more tape into the same volume.

We've done this exercise recently for multi-petabyte enterprise storage systems.

Not going to name brands, but in both cases this is usable (after RAID and hot spares) capacity, in a high-availability (multi-controller / cluster) system, including vendor support and power/cooling costs, but (because we run our own datacenter) not counting a $/RU cost as a company in a colo would be paying:

• HDD: 60TiB/RU, 150W/RU, USD$ 30-35/TB/year
• Flash: 250TiB/RU, 500W/RU, USD$ 45-50/TB/year

Note that the total power consumption for 3.5PB of HDD vs 5PB of flash is within spitting distance, but the flash system occupies a third of the total rack space doing it.

As this is comparing to QLC flash, the overall system performance (measured in Gbps/TB) is also quite similar, although - despite the QLC - the flash does still have a latency advantage (moreso on reads than writes).

So yeah, no. At 1.5× the per-TB cost for a usable system - the cost of one HDD vs one SSD is quite immaterial here - and at 4× the TB-per-RU density, you'd have to have a really good reason to keep buying HDDs. If lowest-possible-price is that reason, then sure.

Reliability is probably higher too, with 300 HDDs to build that system you're going to expect a few failures.

They're not really particularly low power.

Quick search suggests around 8W power consumption with a 2 ohm heater, which at the approximately 4V of a charged Lithium-Ion battery (V=IR, P=VI) checks out to around a 2A draw.

Similar results suggest the batteries inside are in the neighbourhood of 0.75Ah (3.7V nominal) = 2.8Wh. I don't know how much of that capacity actually gets used during the "lifespan" of the vape, but I'd guess half would be a good estimate. In any case, probably safe to assume you need to pack around 2Wh in at minimum.

A Lithium AA battery (Li-FeS2 chemistry) gives you 3.4Ah @ 1.5V = 5.1Wh, but has a maximum discharge current of 2.5A (only 3.8W). The AAA is only 1.2Ah with 1.5A discharge, but two of them would give you 3.6Wh and 4.5W, closer to the target but still under.

You could probably arrange this in some sort of configuration whereby the batteries charge a capacitor and that runs the heater, at those kind of numbers it'd need to be at most a 2 seconds off for 1 second on deal, but that honestly seems like it should be fine for, y'know, vaping. Might just need to have an on/off switch to avoid draining the batteries when you're not using it.

But I guess we're at the point where manufacturing Li-Po cells happens in such vast quantities that the extra electronics to charge a capacitor from a 1.5V battery probably cost more.

Or failing that, take your pick of

• It's like Uber but for...
• It's crypto/blockchain, but applied to...

Back when they were all the rage, one of my colleagues received one of those rubber horse masks in the mail at the office.

Indeed, he had no memory of ordering it.