USB SSD enclosure issues

rajasekhar.mobile · May 27, 2018

Hi,
Right now I'm using m.2 SSD enclosure with note 8 using otg function.

The problem is even though it's recognized as usb3.0 device the speeds are limiting. I'm getting 110mb/s write speed.

But usb 3.0 on my PC gives me 400mb/s write speed for the same drive

I'm trying to achieve more speed on note 8.

I digged little deeper and I found that note 8 isn't capable of powering the drive to achieve the full speeds.

So I'm assuming that if I can power it externally I may be able to get full 400mb/s write speeds in note 8.

Is my assumption wrong? If it's right how can I do this?

Thank you in advance

drtweak · May 28, 2018

Dude. It is a PHONE not a full blow PC. The CPU's and USB Chipsets are NOT designed to shove out the same bandwidth as a PC. Honestly be luckly you are getting 110. I have never see a phone push that kind of speed out before.

rajasekhar.mobile · May 29, 2018

drtweak :

Thank you. Please dont take it in a wrong way.
I know its a phone

but a phone is still a PC. USB 3.0 is still USB 3.0

if its advertised as usb 3.0, then it should be usb 3.0. I still wanna achieve 400mb/s speeds, can you please tell me what is the limiting factor here

1)is it the chip set?
2)Power?
3)Usb 3.0 implementation?

Thank you

drtweak · May 29, 2018

lol trust me you won't get it. USB is not always USB. The phone itself just can not push that speed let alone the internal memory of it isn't even a SSD its Flash storage like a thumb drive so that 100 Megs is as far as you are going to get.

rajasekhar.mobile · May 29, 2018

Yes you are right. I think I missed some information in my original question.

I'm not trying to copy data from phone to SSD.

My note 8, is connected to a USB hub. My SSD is connected to one port of the USB and my small custom computer is connected on the second USB on the hub.

Note 8 recognizes both of them as USB 3.0

My application on note 8 reads data from one USB and writes the data to SSD in the hub simultaneously.

So my transfer speeds aren't limited by local storage of note 8.

So I'm supposed to see min 250mb/s transfer speeds, since the data is traveling in both the directions. Which should be close to 5gbps connection.But I'm not exceeding 70- 150mb/s. So I tried to benchmark just SSD performance , by writing data from the RAM to SSD. I only got speeds of 110-150mb/s.

I'm trying to figure out where is the bottleneck.

It could be that these ports are not usb3.0. so I contacted both Samsung and Google about the USB 3.0 implementation on pixel and note 8. They both said it's capable of delivering 5gbps, but if the phone defects the USB port is draining too much battery too soon , it reduces the power it's giving to usb to prevent damage to phone's battery. And the refused to share on how much current I can withdraw from the USB.

At this point, I'm taking their word that they are not giving my m.2 SSD full power to achieve full write speeds.

In summery I'm not a storage expert, but if anyone know how to power my m.2 SSD externally and also connect to my phone for data transfers without draining any power from phone, I'm guessing it should work .

If not, I can tell my boss to sue Google and Samsung for false advertisement

drtweak · May 30, 2018

You would need a powered USB hub. Even then I don't think you will see those full USB 3.0 speeds though

rajasekhar.mobile · May 30, 2018

Thank you. But I can't find any powered USB hub online.

So I tried type c hub with the power. And also tried Rav power pd with data transfers.

But I'm topped out at 150mb/s.

I'll try a powered USB hub to see if it makes any difference.

Thank you again

Imacflier · May 30, 2018

here is a 4-port hub from amazon: https://www.amazon.com/AmazonBasics-Port-2-5A-power-adapter/dp/B00DQFGH80/ref=sr_1_1_acs_sk_pb_2_sl_1?ie=UTF8&qid=1527710661&sr=8-1-acs&keywords=powered+usb3+hub

drtweak · May 31, 2018

Its only USB 3.0 not 3.1 Gen2 but still more than what you need

https://www.amazon.com/dp/B078S7CLVY/ref=psdc_281413_t1_B06XG59PJB

rajasekhar.mobile · Jun 29, 2018

I dont know under what conditions smartphone manufacturers certify that they are using usb3.1 gen 1 @5gbps , but no matter what phone i tried and how i tried it never exceeded 150mb/s bandwidth. CONSUMERS ARE NOT GONNA TEST is seems to be moto of everyone these days.

things i tried
1)Connected a powered USB hub, and connected two samsung t5 ssds to the hub. copied a large file from to another-- sustained speeds- 70mb/s. usb info show both the drives are connected as usb3.1 drives

2) Directly connected samsung t5 ssd to phone , did a benchmark using an app- write/read speeds are about 150mb/s

3)copied data from internal storage to SSD, again max speeds are about 150mb/s.

Thanks everyone who tried to help me out with the issue.

Search

USB SSD enclosure issues

rajasekhar.mobile

drtweak

drtweak

Illustrious

rajasekhar.mobile

drtweak

Illustrious

rajasekhar.mobile

drtweak

Illustrious

rajasekhar.mobile

Imacflier

Distinguished

drtweak

Illustrious

rajasekhar.mobile

TRENDING THREADS

Latest posts

Moderators online

Share this page