[HN Gopher] UASP makes Raspberry Pi 4 disk IO 50% faster
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UASP makes Raspberry Pi 4 disk IO 50% faster
Author : geerlingguy
Score : 103 points
Date : 2020-07-05 20:26 UTC (2 hours ago)
(HTM) web link (www.jeffgeerling.com)
(TXT) w3m dump (www.jeffgeerling.com)
| totalZero wrote:
| Friends, I have a question but I don't have a Pi 4 sitting around
| to test this:
|
| Is it possible to run a Pi 4 using UASP if I set it up to boot
| from a decent (Sandisk/Samsung/etc) USB 3.1 pen drive?
|
| Also, is this a reliable setup, or will the device be more stable
| if booted and run from a MicroSD?
| geerlingguy wrote:
| I'm going to be testing a few different thumb drives in my next
| post / video. I have a couple SanDisk models and an Arcanite
| USB 3.1 drive that I'll be testing... but I don't believe they
| use UASP (haven't had time to confirm that suspicion yet).
| AnotherGoodName wrote:
| >I found a USB 3.0 SSD was ten times faster than the fastest
| microSD card I tested
|
| I looked it up because i know enough about hardware that this
| shouldn't be the case (even with a cheap SD Card). Seems it's a
| limitation of the Pi's SD Card slot.
| https://www.jeffgeerling.com/blog/2018/raspberry-pi-microsd-...
| UnlockedSecrets wrote:
| Note this is only valid for raspberry pi's made before the 4,
| The 4 includes a much faster SD card slot.
| mlyle wrote:
| Note that the testing was done on a Pi 4...
| UnlockedSecrets wrote:
| > tested on a Raspberry Pi model 3 B+:
|
| No it wasn't.
| geerlingguy wrote:
| This one, however, was:
| https://www.jeffgeerling.com/blog/2019/raspberry-pi-
| microsd-...
|
| Even on my Mac (tested with 6 different readers,
| including one purporting A2 compatibility) the best
| microSD cards are abysmal for random access. But they do
| get closer to 90-120 MB/sec for reads, at least.
|
| To get advertised speeds on most of the cards, I am
| guessing you need to work for the SD association's
| marketing department :D
| https://www.jeffgeerling.com/blog/2019/raspberry-pi-
| microsd-...
| aspenmayer wrote:
| This is more up-to-date, and includes more models of Pi's and
| SD cards. It was linked in your post, but the post is now out-
| of-date relative to my link below.
|
| https://pidramble.com/wiki/benchmarks/microsd-cards
| geerlingguy wrote:
| If you want to bookmark a page, that's the one that I update
| every year or two (usually after a new Pi model is released).
| The blog posts fade a little in relevance over time since I
| don't keep them updated.
| floatboth wrote:
| > Without UASP, a drive is mounted as a Mass Storage Device using
| Bulk Only Transport (or BOT), a protocol that was designed for
| transferring files way back in the USB 'Full speed' days
|
| Wow, holy shit, TIL.. I was always assuming that USB drives were
| always SCSI -- they show up as 'da' (Direct Attach) on FreeBSD
| after all.
|
| Looking at umass driver source:
|
| * The driver handles 3 Wire Protocols
|
| * - Command/Bulk/Interrupt (CBI)
|
| * - Command/Bulk/Interrupt with Command Completion Interrupt (CBI
| with CCI)
|
| * - Mass Storage Bulk-Only (BBB) (BBB refers Bulk/Bulk/Bulk for
| Command/Data/Status phases)
|
| * Over these wire protocols it handles the following command
| protocols
|
| * - SCSI
|
| * - UFI (floppy command set)
|
| * - 8070i (ATAPI)
|
| * UFI and 8070i (ATAPI) are transformed versions of the SCSI
| command set.
|
| Huh, they _are_ pretty much always SCSI, and "bulk only" is
| (unsurprisingly) only a USB transport level thing that doesn't
| change the command set.
|
| I guess "UASP" is some sort of marketing term for
| Command/Bulk/Interrupt then..?
| megous wrote:
| Goals section:
|
| https://en.wikipedia.org/wiki/USB_Attached_SCSI
| Ijumfs wrote:
| The Pi 4 is a big revolution, fast enough to serve as a desktop
| computer for most office people, students, and so on. It's pretty
| impressive and more attention is being paid to it as a first-
| class computing platform as time goes on.
|
| Our desktop monoculture has led to serious security problems and
| massive stagnation at least until recently. Even if you don't use
| a Pi you should be thankful that they exist.
| mixmastamyk wrote:
| It should be and is decent, but when we tried we ran into
| numerous paper-cuts:
|
| - Needed to set up NTP to set the clock, it was always wrong.
|
| - It can't power down through software, so you have to shut
| down and then hit the power switch like its 1990.
|
| - Audio was a mess and had to spend hours researching how to
| write and edit a bunch of config files to make it predictable.
|
| - The weird set up program means you need to do a lot of
| googling on how to fix issues in a non-standard to linux way.
| It mostly works however.
|
| - Raspbian feels not quite "finished." Was much happier with
| Ubuntu Mate, as they fixed 99% of the paper cuts already, but
| it doesn't support the 4 yet.
|
| In short, it is a bit too cheap. I would have definitely spent
| another dollar to see these hardware issues fixed. Or dropped
| the CPU speed a hundred MHZ, whatever it takes.
|
| In the end, A friend gave us a ten-year-old used iMac for free.
| I installed Ubuntu Mate on it and it had none of the above
| problems.
| Narishma wrote:
| > The Pi 4 is a big revolution, fast enough to serve as a
| desktop computer for most office people, students, and so on.
|
| Even the Pi 3 was already good enough for most of those use
| cases. The main exception being browsing modern bloated
| websites.
| floatboth wrote:
| The Cortex-A53 is _really_ weak. I wouldn 't want to run an
| office suite on that either. Oh, and the Pi 3 was VERY
| limited by RAM.
|
| "most office people, students, and so on" pretty much always
| do browse lots of modern websites, at the same time as
| running an office suite, audio player, and more stuff.
|
| The A72 is really the "minimum viable CPU core" for desktop
| usage. Anything with less single-core performance is absolute
| hell and suffering.
| geerlingguy wrote:
| The CM 3+ (which is clocked at 1.2 GHz but is same in other
| ways to the Pi B 3+ which is 1.4 GHz) is less than half as
| fast as the Pi 4 in most CPU tasks:
| https://www.jeffgeerling.com/blog/2020/raspberry-pi-
| cluster-...
| geerlingguy wrote:
| The CPU is now (IMHO) the major sticking point for many of my
| own use cases. It would also be nice to have an easier / less
| cumbersome way to connect higher speed storage. (The mess of
| cabling you get with an add-on USB 3.0 drive is annoying.)
| tlrobinson wrote:
| > The mess of cabling you get with an add-on USB 3.0 drive is
| annoying
|
| I'm surprised there's no Raspberry Pi case with a slot for a
| 2.5" drive and integrated USB 3.0 SATA controller.
| geerlingguy wrote:
| There are a few, and they're not too bad, but it's still
| something that would be neatly solved with an option of a
| PCIe slot or even onboard eMMC like on the compute module
| (assuming the eMMC or built-in NVMe was much faster than
| the one on CM3+ and below).
| Zenst wrote:
| there are, can even make your own. One quick example
| https://www.amazon.co.uk/MakerHawk-Upgrated-
| Raspberry-2-5-In...
| pedrocr wrote:
| At that point you probably want a NUC style computer like the
| Lenovo M75q. Up to 4 core 8 thread, 32GB+ RAM (two slots),
| AMD graphics and an M.2 slot.
|
| https://psref.lenovo.com/syspool/Sys/PDF/ThinkCentre/ThinkCe.
| ..
| 867-5309 wrote:
| being 3-4x the size, weight, price and power consumption,
| it really doesn't compare. I'm sure pi4 SATA/NVMe
| enclosures/hats exist
| nerdbeere wrote:
| Also noteworthy is the upcoming ASUS PN 50 with the new
| Ryzen Renoir CPUs with up to 8 cores and 64GB RAM.
|
| When this will be available in Europe I'll get that to
| replace my MacBook for a developer machine.
|
| https://liliputing.com/2020/06/asus-pn50-is-a-mini-pc-
| with-u...
| thebruce87m wrote:
| The DeskMini series has two M.2 slots AND two 2.5" slots in
| a tiny enclosure. Here's mine:
|
| Noctua NH-L9A-AM4, 37mm Premium Low-profile CPU Cooler for
| AMD AM4 (Brown) PS36.17 incl. VAT
| https://www.amazon.co.uk/Noctua-NH-L9A-AM4-Premium-Low-
| profi...
|
| ASRock USB 2.0 Header to 2 x USB 2.0 Cable for DeskMini
| Series Chassis PS10.93 Incl. VAT
| https://www.amazon.co.uk/ASRock-Cable-Deskmini-Mini-Stx-
| Chas...
|
| AMD Ryzen 5 3400G Processor (4C/8T, 6MB cache, 4.2GHz Max
| Boost) with Radeon(tm) RX Vega 11 Graphics PS139.99 incl.
| VAT https://www.amazon.co.uk/dp/B07SXNDKNM/?tag=pcp0f-21
|
| Sabrent 1TB Rocket NVMe PCIe M.2 2280 Internal SSD High
| Performance Solid State Drive (SB-ROCKET-1TB) PS109.99
| incl. VAT
| https://www.amazon.co.uk/dp/B07LGF54XR/?tag=pcp0f-21&th=1
|
| ASRock DeskMini A300 Mini PC Barebone for Socket AM4
| PS146.94 incl. VAT
| https://www.amazon.co.uk/dp/B07P9GL1LN/?tag=pcp0f-21
|
| ASRock Wi-Fi Kit for DeskMini Series Chassis, includes 2 x
| Antennas PS29.42 incl. VAT https://www.amazon.co.uk/ASRock-
| Wi-Fi-DeskMini-Chassis-Anten...
|
| 2 x ADATA AD4S2666316G19-S 16GB DDR4 2666 MHz Memory Module
| - Memory Modules (16GB, 1x 16GB, DDR4, 2666MHz, 260-pin SO-
| DIMM) 2 x PS73.12 incl. VAT https://www.amazon.co.uk/ADATA-
| AD4S2666316G19-S-16GB-Memory-...
|
| Price a few months ago - PS619.68
|
| Note that you don't need the noctua fan but the provided
| fan that comes with the case is a bit whiny.
| opencl wrote:
| It's also possible to fit the fan included with the 3400G
| into the deskmini with slight modification (removing the
| plastic shroud from the top, it's just clipped on).
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(page generated 2020-07-05 23:00 UTC)