Post AvuQM9LhmEeW2vT3Ee by tomjennings@tldr.nettime.org
(DIR) More posts by tomjennings@tldr.nettime.org
(DIR) Post #AvuIrfqqBYI4C4YHbM by tomjennings@tldr.nettime.org
2025-07-08T00:47:42Z
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SD cards are a technology taken right out of early Gibson, real neuromancer shit. Incredible trash tech. Gigabytes of low quality abundance. Small enough to lose even when you're paying attention. Extraordinary but embarrassingly low grade. There's very nice classy ones from SanDisk but there's so many more from nameless foundries for sale on AliExpress and a tenth the price, that mostly work. (Chairman George Morrow would shit bluebirds: "never underestimate the bandwidth of a station wagon full of floppy disks", two obsolete things in one sentence.)I'm using the big ones in my cp/m machine. Doing serious endurance testing and marginal testing. The really cheap ones do _weird_ things sometimes but work ok, mostly. I now have some good test code, ask me in a week.... With two cards installed, on the same SPI buss, doing random disk random block random read/write I *suspect* there is some odd stuff going on, but it's hard to separate code from electronics from the cards' various effects. Pretty fucking interesting though.I want to make the cheap cards as usable as the good ones. I think tristate buffers will do that. Rooting for the underdogs.
(DIR) Post #AvuJWCPmXApIlsDeoi by tsturm@famichiki.jp
2025-07-08T00:55:00Z
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@tomjennings "SD cards are a technology taken right out of early Gibson, real neuromancer shit. Incredible trash tech. Gigabytes of low quality abundance."What a great paragraph.
(DIR) Post #AvuJkfw3ZecoNjDb9s by stacey_campbell@aus.social
2025-07-08T00:57:35Z
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@tomjennings The other day I saw a page where someone documented their test-to-failure for all manner of SD cards from Alixpress and Amazon. It tracks with what you've said here.
(DIR) Post #AvuJq2imHgrkUyZCC0 by troublewithwords@wandering.shop
2025-07-08T00:58:36Z
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@tomjennings I don't know if you've come across this, but a person has done a lot of work testing SD cards from all kinds of backgrounds.https://www.bahjeez.com/the-great-microsd-card-survey/
(DIR) Post #AvuKnDP8CyCqiWaoSG by smellsofbikes@mastodon.social
2025-07-08T01:09:18Z
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@tomjennings microSD as microRAID?
(DIR) Post #AvuQ4VBbqeXcYoKXc8 by tomjennings@tldr.nettime.org
2025-07-08T02:08:28Z
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@troublewithwords @stacey_campbell Thanks! I did, then lost it! lol. Typical.It's an exhausting amount of information there.
(DIR) Post #AvuQ9O79ZK0w4jZlEe by tomjennings@tldr.nettime.org
2025-07-08T02:09:22Z
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@smellsofbikes OOH! Now there's a scary but cheap idea! Gonna search for such a thing. Someone must have done this! It's a really great bad idea!
(DIR) Post #AvuQGITyuEaIdTY2Eq by tomjennings@tldr.nettime.org
2025-07-08T02:10:35Z
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@troublewithwords @stacey_campbell Also I'm using the full size SD cards, which are even dumber-er. The small ones are too small!
(DIR) Post #AvuQM9LhmEeW2vT3Ee by tomjennings@tldr.nettime.org
2025-07-08T02:11:40Z
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@smellsofbikes There's lots of them out there!
(DIR) Post #AvuSPRI1jKzySuRYBc by troublewithwords@wandering.shop
2025-07-08T02:34:38Z
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@tomjennings @stacey_campbell There truly is. I wondered if it would even be helpful to you, it’s a lot. Somewhere I figured out how many SD cards could fit in a standard panel van, but also lost it. It was a lot of zeros.
(DIR) Post #AvuSvTbsdgvSvb0RrE by tomjennings@tldr.nettime.org
2025-07-08T02:40:26Z
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@emi Nice find!!! I'm certain I read that, have no recollection. I must have simply absorbed it.
(DIR) Post #AvuTMRUacWZEBASEcq by tomjennings@tldr.nettime.org
2025-07-08T02:45:19Z
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Turns out my "genuine" SanDisks from the eBay guy are HORRIBLE! I broke two, with mere hundreds of writes! Seriously, I did an initial couple passes of sequential writes to install the fill pattern, read them back no problem. But the murder test, random drive random write or read random block, errors piled up quickly. Then they failed simple read tests! Powered everything off on again, failure persists. They're like SPECTACULARLY BAD! Tomorrow I'll test the ones I got from SanDisk. You'd think I would have tested these first.. but they're circulating here somewhere will have to locate them.
(DIR) Post #AvuTab1C04kDmFS9hY by rrmutt@mastodon.social
2025-07-08T02:47:52Z
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@tomjennings Indeed! https://www.tomshardware.com/news/low-performance-external-m2-nvme-ssd-found-to-have-microsd-cards-inside
(DIR) Post #AvuVTcCjOLlhKxeJQu by utf_7@mastodon.social
2025-07-08T03:09:00Z
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@tomjennings i should overthink my backup strategy? 3-2-1.3 backups2 different devices (1 backup on the sd card, 2 backups on the micro sd card)1 off site (so not plugged into the device)
(DIR) Post #AvuVgUQ7dydaxa3H60 by scruss@xoxo.zone
2025-07-08T03:11:18Z
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@tomjennings if you're buying a *lot*, the oddly-named Everything but Stromboli are a very legit bulk reseller
(DIR) Post #AvuWfa94yLlgNfD9RA by tomjennings@tldr.nettime.org
2025-07-08T03:22:22Z
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@emi I think you nailed it.
(DIR) Post #AvuX0CM2cbVAfx6Y4X by skua@mastodon.social
2025-07-08T02:58:05Z
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@rrmutt @tomjennings gigglingstill giggling, with a hint of mania
(DIR) Post #AvuX0Ddnq3IsfKQFOa by tomjennings@tldr.nettime.org
2025-07-08T03:26:07Z
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@skua@mastodon.sociMe too! Lol there is no bottom. But it was so cheap!! @rrmutt
(DIR) Post #Avuaoeg7t6HcrXFahE by wotsac@mastodon.social
2025-07-08T04:08:50Z
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@tomjennings @smellsofbikes there are a number of variations on SD/microSD RAID. My iPods have 4 microSD card spanned storage instead of hard drives.
(DIR) Post #AvuayIphxnGk0QKgee by wotsac@mastodon.social
2025-07-08T04:10:36Z
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@tomjennings @troublewithwords It's entirely possible those 'full size' SD cards are actually just microSD cards basically glued in to an adapter.
(DIR) Post #AvubMGQwXIPlVwAtMW by infosec_jcp@infosec.exchange
2025-07-08T04:14:53Z
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@tomjennings @smellsofbikes I found this same thing on wish .com, don't go there, advertised as ' usb3 ', it was actually usb2, but had a blue ' usb3 ' end to ' sell the fraud '.It was malware infested with windows malware. Cray cray cheap though. Ended up being four usb2, total generics in a config kinda like this microSD card setup.They didn't anticipate me ripping it apart, fixing the solder points, ditch their whole shell since the firmware had burned in malware also, for persistent reinfections, obviously from china. Cheapest crap I've ever bought to ' do a self study on chinese malware ' cost wise though.ProTip about Wish .Com:You can just surf & find the software sold there WITHOUT buying a SINGLE thing since most of it IS infected as Windows, MacOS, Android & IOS apps that go along with their splitter cell ' google engineer owned .com '.A fun distraction during the pandemic.#VirusTotal'd tales, 💯 ☣️🔍📝🧐#infosec_jcp #investigations into #WishCom (Don't buy hardware or software from there. It's #malware infested cr☣️p from a #GoogleEngineers side project.)☣️👇https://en.wikipedia.org/wiki/Wish_(company)
(DIR) Post #Avuc2s6kr060WP34hE by tomjennings@tldr.nettime.org
2025-07-08T04:22:39Z
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@wotsacGood point -- I will take some of these apart and look! @troublewithwords