DIY SSD made of SD Cards! August 30, 2018 – Posted in: Videos

Transcript

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Okay so today’s video yeah it’s a product that really
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makes no
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sense to me at least on the surface this right here is i’ve actually got the product page up behind me this is come on come on get in here
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check this out check this up this is the i don’t know highland star
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microelectronic
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anyway we ordered it from usb dot brando dot-com
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and this doodad right here adapts as
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as regular sata interface with some controller from sage that i’ve never heard of to 10 micro sd slots
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That’s quality right there so yes my friends today we’re gonna make our own ssd
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[LTT Theme] {click click}
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[Intro] Song: Lazlo Supernova
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Today’s videos brought to you by tunnel bear the simple VPN try Tunnel bear for free at tunnelbear.com/LTT
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we’re gonna have that linked below
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So step one is gonna be some RATFAM because
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while it does seem fairly straightforward in principle you take the 10
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micro sd cards that Kingston graciously sent you because you’re a famous youtuber and then you
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Install them in all the things i do want to make sure that we are doing it correctly
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so instructional note number the first you can use 1 2 4 8 or
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10 micro sd cards at one time it does not support 3 5 7 or 9
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Instructional step number ii insert the micro sd cards into the micro sd slots one by one as
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The order shown on adapter where’s the
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CHP0L I just see COM tf 1 tf 6 tf 2 i think that’s for trans flash
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why does this pcb say demo on it
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okay well
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We’re just gonna we’re just gonna go according, to the numbers so where’s here’s tf 1 let’s do this thing wait doing this write
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Down and then you slide it there we go
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So the idea here is that it runs all of your micro SD cards which
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aside from being a much lower grade typically than the nand flash that you would find in an ssd
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are
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fundamentally the same thing it runs them all in RAID 0
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To make up for the fact that a typical micro SD card will be capable of anywhere from you know 20 to
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maybe 80 to 90 megabytes a second reads and writes whereas a typical
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SSD especially a SATA 3 one can saturate a SATA 3 interface at around you know 500
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Mm 50 or so megabytes per second
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One problem that i do foresee though is that there’s more
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To life than sequential performance when it comes to
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SSD
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and the controller dictates what the random performance will be like and
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oh
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That too ignores the other problem which is that the flash on a typical microsd card is not only slower
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But also less resilient than the higher quality stuff on a normal SSD a problem that is
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compounded this is all about the problems with this thing hey
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Compounded by the fact that you’re running this whole thing in RAID 0 so one dead micro SD card means
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there goes your data it’s gone, so there it is for better or for worse this is now a
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1.2
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terabyte RAID 0
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micro SD
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SATA SSD I don’t know what it is let’s plug it in this is so dumb it’s like cool but it’s like
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why
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there it is
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no way
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1.16 terabytes of useable space let’s call this
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drive letter k
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has it special
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So i’m actually a bit of a loss
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now because i’m gonna let you guys behind the curtain for a second here while i was prepping this video i actually
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realized that this probably wasn’t going to work
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because i hadn’t gone through the instructions
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ahead of time and i just noticed that it says right here
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do not support uhs-1 and
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these are quite clearly
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uhs-1, cards
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so i
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Was expecting to like go on a field trip to best buy and come back?
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But it’s working so let’s let’s test it i guess ok, so if i told you we have the world’s stupidest ssd
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special k drive here how would you benchmark it it’s 10 micro sd cards on a pcb
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we could use crystaldiskmark, ATTO disk benchmark
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i’m coming into this with
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literally no expectations whatsoever
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actually at 512-byte that’s right even that bad is it
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this is that a queue depth of eight though so to be clear this is very unrealistic for a desktop workload
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okay
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So there’s a couple of takeaways here number one is that our drive is indeed sata to and number two is that
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The performance is actually
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better than i expected
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but this is just
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sequential this doesn’t really tell us anything about how it would perform in a real-world
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workload let’s head it with crystal disk mark just for lulz oh
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wow um
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we’re still gonna run the pass mark test i guess but this is not looking good for random performance this is performing
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about like you’d expect from a bad SSD four or five years ago because there’s a lot more
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To SSD performance than just
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taking a bunch of nand flash and
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writing to and reading from it in a
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Parallelized manner to get more speed out of it the controller intelligence has to be high in order to get
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better oh, wow these random numbers these are awful
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okay
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So for our last trick
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pass mark just thread test so
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The average latency here doesn’t really tell us the whole story because where you really feel
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the slowness of a drive is when it when it spikes
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That’s what most modern SSDs are really trying
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To overcome this those spikes and latency that’s when you like click on something and you feel like your computer’s like?
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So we are seeing spikes up to almost half a second on this drive
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with a lot of them actually sitting here around a fifth of a second so
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while you could
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run an os on this thing i
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really wouldn’t recommend it and to drive that point home
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i’ve actually spent the last half an hour
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waiting for windows to install off a usb drive and it’s still at
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81% of getting files ready for installation
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this thing is kind of painfully slow like to the point where i’m having a really hard time figuring out what
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its purpose could possibly be because you might go oh well you know maybe
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Disposable data that you need to be faster than a hard drive?
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But not as fast as an SSD like a steam game library but even then the cost is so high
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to fill this thing with 64 gig or
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128 gig microsd cards like we did would cost more than just buying a proper ssd like a crucial mx 500 or a wd blue
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so
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I’m not sure why it exists but it does
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And it’s cool
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So there it is
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After the starter set replacement cartridges are just a few bucks a month’s so head over to
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dollarshaveclub.com slash lightest we’re gonna have that link below and join the club
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so thanks for watching guys if you dislike this video you can hit that button but if you liked it hit like get subscribed maybe
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consider checking out where to buy the
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maybe not that this thing but maybe the SD cards and and that site actually where we got this has lots of other cool random
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gadgets as well so you can check that out at the link in the video description
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also linked down there is our merch store which has cool shirts like this one and our community forum which you should totally join