dstokesdubois
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3.0 USB Thumb drive?

Mon Feb 06, 2017 9:35 pm

MY new (Raspberry Pi 3 (RPi3) Model B Quad-Core 1.2 GHz 1 GB RAM) calls for a 2.0 USB flash drive. Can it use a 3.0 thumb drive?

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kusti8
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Re: 3.0 USB Thumb drive?

Mon Feb 06, 2017 10:09 pm

Yes, USB is backwards compatible.
There are 10 types of people: those who understand binary and those who don't.

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Paeryn
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Re: 3.0 USB Thumb drive?

Mon Feb 06, 2017 10:10 pm

dstokesdubois wrote:MY new (Raspberry Pi 3 (RPi3) Model B Quad-Core 1.2 GHz 1 GB RAM) calls for a 2.0 USB flash drive. Can it use a 3.0 thumb drive?
Generally a USB 3 memory stick should work in a USB 2 host like the RPi albeit in USB 2 mode. I think a USB host and device negotiate what they support so unless a USB 3 device specifically couldn't work under USB 2 (e.g. it requires the higher power or bandwidth) then there shouldn't be problems.
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dstokesdubois
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Re: 3.0 USB Thumb drive?

Mon Feb 06, 2017 10:59 pm

will it be faster than a 2.0 thumb drive?

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DougieLawson
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Re: 3.0 USB Thumb drive?

Mon Feb 06, 2017 11:01 pm

dstokesdubois wrote:will it be faster than a 2.0 thumb drive?
No, the Raspberry can't drive USB 3.0 equipment at USB 3.0 speeds. The USB bus is V2.0 ONLY.
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fruitoftheloom
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Re: 3.0 USB Thumb drive?

Mon Feb 06, 2017 11:18 pm

dstokesdubois wrote:will it be faster than a 2.0 thumb drive?
First paragraph:

http://www.integralmemory.com/faq/usb-3 ... sb-2-ports
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dstokesdubois
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 11:44 am

according to that article it sounds as if the drive is what is determining the whether the port is 2.0 or 3.0. Is that correct? And if so is it possible to find a dive that would allow my PI3 2.0 port to run at 3.0 speeds?

ghans
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 11:53 am

No existing Pi can act as USB3 host and will ever achieve USB3 speeds . They simply haven't got the neccessary controller
inside the SoC. This applies to all kinds of computers (Dell , Apple , Lenovo , Hardkernel ..) with USB2 host controllers - which seems obvious , how else
would you justify the sale of new hardware at all ... :P

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Paeryn
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 11:58 am

dstokesdubois wrote:according to that article it sounds as if the drive is what is determining the whether the port is 2.0 or 3.0. Is that correct? And if so is it possible to find a dive that would allow my PI3 2.0 port to run at 3.0 speeds?
No, a host port cannot run at a level higher than it is. A host port or device however can run at a lower level. Basically they run at the highest level that they both support.
She who travels light — forgot something.

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fruitoftheloom
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 12:03 pm

dstokesdubois wrote:according to that article it sounds as if the drive is what is determining the whether the port is 2.0 or 3.0. Is that correct? And if so is it possible to find a dive that would allow my PI3 2.0 port to run at 3.0 speeds?
You what, it clearly states in first paragraph:

The USB 3.0 Flash Drive or card reader will work at the speed of the port, for example if you use a USB 3.0 Flash Drive in your USB 2.0 laptop, it will work at USB 2.0 speed.

WHY DO I BOTHER !!
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dstokesdubois
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 1:54 pm

fruitoftheloom wrote:
dstokesdubois wrote:according to that article it sounds as if the drive is what is determining the whether the port is 2.0 or 3.0. Is that correct? And if so is it possible to find a dive that would allow my PI3 2.0 port to run at 3.0 speeds?
You what, it clearly states in first paragraph:

The USB 3.0 Flash Drive or card reader will work at the speed of the port, for example if you use a USB 3.0 Flash Drive in your USB 2.0 laptop, it will work at USB 2.0 speed.

WHY DO I BOTHER !!
Sorry "Fruitoftheloom" if my stupid question irritated you. That's what happens when you get a retired Firefighter tying to learn "Ex Computer Repair & Service Technician" stuff. But the quote from the article you referenced when you scolded me DID NOT clarify whether it was the software driver or the physical attributes of the port that were determining its speed.

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fruitoftheloom
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 2:48 pm

dstokesdubois wrote:But the quote from the article you referenced when you scolded me DID NOT clarify whether it was the software driver or the physical attributes of the port that were determining its speed.
:oops: :oops: :oops: :oops: :oops: :oops:

Apologies, it is the USB Controller Chipset which ultimately defines the USB Speed ie hardware ;)

The Raspberry Pi has a USB 2.0 BUS and on your RPi 3B the BUS is attached to a HUB Chip which is USB 2.0 compliant and bought out to 4 USB Ports and an Ethernet Port, therefore if you plug say a basic mouse in it will enumerate as USB 1.1, if you plug a USB 2 Flash Drive it will enumerate as USB 2.0, whereas if you plug your USB 3 Flash Drive in it will also enumerate as USB 2.0, as it does not understand USB 3 - backward compatibility.
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dstokesdubois
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Re: 3.0 USB Thumb drive?

Tue Feb 07, 2017 10:09 pm

Thanks, It makes sense now. I was really hoping it was something that could be upgraded. I'm using (9) PI3's, (1 master syncing with 8 remotes), this year to control Christmas lights and am trying to solve a timing lag. One of the suggestions was to get the fastest thumb drives and Micro sd cards that I could afford. I really do appreciate the patience and the help that you guys give to us newbies on the various forums.

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fruitoftheloom
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Re: 3.0 USB Thumb drive?

Wed Feb 08, 2017 12:51 am

dstokesdubois wrote:Thanks, It makes sense now. I was really hoping it was something that could be upgraded. I'm using (9) PI3's, (1 master syncing with 8 remotes), this year to control Christmas lights and am trying to solve a timing lag. One of the suggestions was to get the fastest thumb drives and Micro sd cards that I could afford. I really do appreciate the patience and the help that you guys give to us newbies on the various forums.
If you have connected your RPi's by Ethernet there is a way to get more I/O, see:

https://www.jeffgeerling.com/blogs/jeff ... networking


Regards SD Cards see:

http://www.pidramble.com/wiki/benchmarks/microsd-cards
My only "PC" is an Asus ChromeBit running ChromeOS, cloudcentric at its best !
Rockchip Quad-Core RK3288C SoC as used in ASUS Chromebook C201 & Chromebook Flip C100PA as well as the Tinker SBC.
3 Mobile Huawei E5330 Mobile Mi-Fi

levasc
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Re: 3.0 USB Thumb drive?

Wed Oct 25, 2017 8:31 am

Hi, I think that the answer to question, whether will the USB 3.0 flash drive be faster than USB 2.0 drive, is - yes, because of better flash controller: " flash controllers in a USB 3 flash drive are very fast, even if you never leave USB 2 speeds. Your average USB 2 flash drive will never max out USB 2 speeds, but even a moderate USB 3 drive will be more likely to hit the top end of USB 2 speeds, due to that faster flash controller."
Here: https://www.reddit.com/r/raspberry_pi/c ... pberry_pi/

People understand that USB 3.0 flash will work only at USB 2.0 speeds with raspberry pi, but average USB 3.0 flash drive most likely be faster than average USB 2.0 flash drive.

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