Database Users

Why is USB transfer rate so slow?

Hi experts I was hoping somebody here could throw some clues my way.
I have a 32A Rogers magic. (rogers HOFO )
I usb mounted the drive, and transferred a movie on there just for fun, and it was really SLOOOOOW , using the 2 gig sandisk microsd card it came with
So I tested the transfer rate, and write was about 3 meg/second. ouch
reads are about 5 meg/second (!)
SO I got an 8 gig type 6 card to solve this problem. I tested it first with a usb card reader, it reads at 16 - 17 meg/second (same usb port)
Put it in the Magic, and I'm back to 3 / 5 again, with the new card too.
The specs say "USB 2.0" - yet this is unbelievably crappy usb transfer rates :-(
I tried my buddy's Dream, it's exactly the same too. 3 / 5
Why? Any clues? Is there something to tweak?

are you using the usb cable that came with it or your own one?
either way, have you tried a different cable?

yes, tried that. And with a whole other phone, computer, and cable ;-)
I just tried it again though, it's the exact same, 3 MB/s write, 5.7 MB/s read on the HTC cable, and the normal one I use.
Why, is yours faster?
Could you use a stopwatch (like www.online-stopwatch.com),
and copy around a 100 or 150 meg .ZIP file to it, and tell me how many seconds it took?

i just transferred a 550mb video clip from my laptop to my phone and it took 1m 28s.
my laptop isn't particularly fast either, so will have had some affect.

Thanks
That's about 6MB/s (550/88), that's better for writes than mine, close to double...
How long does it take to get it back, reading?

59 seconds.
but don't forget my laptop sucks so that time will be a bit high.

9.3 MB/sec still kicks mine. Thanks for checking that out.
This one reads really fast on a card reader, over 16MB/s
I guess it doesn't like Android phones. :-( I don't get it.

What brand / class is your card? Mine's transcend 8GB type 6

mine is the same.
at least, i think it's transcend.
it's certainly 8gb class 6 anyway.

just a thought...
what rom are you using?
the default or a modified one?

The HOFO roms
I've got it up to 8 to 9 MB/s writes, and 6- 7 MB/s reads now
That's exact opposite to yours, lol.

Slow File Transfer With HD

I havent had my hd Long, so im not sure if this is normal or not, when i transfer files to my hd it takes ages compaired to my diamond, even in disk drive mode it took 4 minutes to copy a radio to my device, is this normal or am i doing sumat wrong? i have a 8gb transend micro sdhc card

mancsoulja said:
I havent had my hd Long, so im not sure if this is normal or not, when i transfer files to my hd it takes ages compaired to my diamond, even in disk drive mode it took 4 minutes to copy a radio to my device, is this normal or am i doing sumat wrong? i have a 8gb transend micro sdhc card
Click to expand...
Click to collapse
I can transfer a heavy rom (190mb) in approx 40secs no prob when on disk mode

is it your usb port? seems like your getting usb 1.0 performance which is what i get when using my hd with my old laptop

samad115 said:
is it your usb port? seems like your getting usb 1.0 performance which is what i get when using my hd with my old laptop
Click to expand...
Click to collapse
it was just the energyrom i was using, since i changed i can copy files using active sync faster than that rom was letting me do it in disk drive mode

micro sd transfer slow.

can anyone let me know if the rom used in the hd effect the speed of the transfer of files when the hd is connected to the pc as mass storage
since i got my replacement phone a few weeks back the sd transfer speed has been sketchy. im getting speeds of 32 kbs and im wondering what the cause is
windows 7 rc
the phone (hardware)
the phone (software)
the cable (my htc cable split so im using others)
the card (sandisk 16gb class 2)
so ive ruled out windows 7 rc as the slow transfer speed in consistant with xp pro home and a retail windows 7
at first i did think is was the cable but ive used a good few to try and see if this is the problem. the pattern of slow transfers run throughout the wires i have
i have tried another card in my phone and i got the same result
this leaves me with two possibilites
the phone hardware (oh and it hs newton rings) is screwed and i need a replacement
or
the phones rom is conflicting with the transfer somehow
can anyone tell me if theyve experienced drastic changes in the transfer speed depending on the rom used

Hi
Since i had a replacement from Orange a few weeks ago everything has been - well faster and without problems - and that is with the stock Rom. Loaded all my old apps and have no complaints. Will measure my transfer speed and let you know.
r
Andrew

-PiLoT- said:
can anyone let me know if the rom used in the hd effect the speed of the transfer of files when the hd is connected to the pc as mass storage
since i got my replacement phone a few weeks back the sd transfer speed has been sketchy. im getting speeds of 32 kbs and im wondering what the cause is
windows 7 rc
the phone (hardware)
the phone (software)
the cable (my htc cable split so im using others)
the card (sandisk 16gb class 2)
so ive ruled out windows 7 rc as the slow transfer speed in consistant with xp pro home and a retail windows 7
at first i did think is was the cable but ive used a good few to try and see if this is the problem. the pattern of slow transfers run throughout the wires i have
i have tried another card in my phone and i got the same result
this leaves me with two possibilites
the phone hardware (oh and it hs newton rings) is screwed and i need a replacement
or
the phones rom is conflicting with the transfer somehow
can anyone tell me if theyve experienced drastic changes in the transfer speed depending on the rom used
Click to expand...
Click to collapse
I've noticed transfer speed from SD to PC has become very slow, but this appears to coincide with some of the latest rom builds or possibly wm6.5.x. If you revert back to a stock rom the transfer speed is back to normal

Well SK Tools tells me the write / read to my Sandisk 16gig card is
Write 803.66 KB/sec
Read 6880.18 KB/sec
With data transfer via the cable to my laptop I used CrystalDiskMark to measure and the results were
-------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------
Sequential Read : 6.376 MB/s
Sequential Write : 4.339 MB/s
Random Read 512KB : 6.383 MB/s
Random Write 512KB : 1.786 MB/s
Random Read 4KB : 1.245 MB/s
Random Write 4KB : 0.021 MB/s
Test Size : 50 MB
Date : 2009/12/23 9:04:00
To confirm I copied a 150MB film from the HD to to PC and it took 24 seconds.
I don't know if any of this helps but as said before I am happy with the speed.
r
Andrew

Micro SD HC 16GB Slow trnasfer speed
This is as confusing as it can get...
i can transfer 10MB under 2-3 seconds... but as soon as i go to transfer a 400MB video file i recored on my Samsung Epic in 720HD mode.. it wants to transfer at like 200KB/Sec.. like what's that about.... so i shoot a quick video... with file size of about 5MB.. and it transfered faster than i could blink.... Are these cards like some how restricted to make our larger file transfers a miserable hell to back up to the computer???
Any help wold be appricaited...
My system specs..
Windows Vista ultimate 64bit
Quad core 3.4Ghz ( That can't be an issues lol)
A gigabit mother board with USB 2.0 and 3.0 ( same results from both)
6GB DDR3 Ram
etc.....
Thax...

its the cable you are using
i tried using other cables to connect my hd to the computer and it is slow
and when i tried with the orignail it was faster
so i think you might need to buy a touch hd usb cable

Transfer data from pc to TF101 too slow

Hi all,
I use usb cable to transfer game data to TF101 (around 1GB, 4500 files), but it's too slow (take almost 2 hours).
Have you got this problem? Copy 1 file is OK (1GB), but what problem with large amount of file?

I guess its because multiple files all have to go through one by one
Sent from my Transformer TF101 using XDA Premium HD app

Its normal. Flash chips arent very good at handle small files, and the TF is no exception. In fact, its quite bad.
Even my SSD Disc, which is capable of writing files at ~550MB/sec, struggles with a lot of small files, down to speeds as low as 10MB/sec.
Theres nothing you can do about it. Its just the way flash chips works today.

But it's strange that Samsung GS II do much faster than my TF101.
And also HTC HD2 (around 15-20 min).
I have tested, copy to internal memory and sdcard have the same problem (use usb cable).

Slow transfer speeds when connected via USB do sound familiar. But it seems this is not caused by a slow SD card. If I plug the MicroSD card into the card reader of my laptop, transfer speed is much higher than copying data to said card when connected via USB and plugged into my Transformer.
Seems the bottleneck is the MTP protokoll or the Transformer itself.
Sent from my Transformer TF101 using Tapatalk 2

chat2004 said:
But it's strange that Samsung GS II do much faster than my TF101.
And also HTC HD2 (around 15-20 min).
Click to expand...
Click to collapse
Its not strange. Those devices have faster flash memory than the TF.
Also, the cardreader in the TF is also very slow, compared to your average card reader for a PC/laptop.
Even the card reader in my N7B is slightly faster than the TF, despite being more than half the price of a TF.
Using ADB to transfer files, the N7B manages an average of 5.2MB/sec, while the TF only manages around 4.8MB/sec using the same card (class 4 iirc). It may not sound like a huge difference, but calculate that on a large file and the speed difference is a lot more noticable.
The TF is faster than the N7B on small files though, thanks to the faster CPU, but not by much, only around 0.2MB/sec difference.
TL;DR The TF's cardreader and flash memory sucks.

Goatshocker said:
TL;DR The TF's cardreader and flash memory sucks.
Click to expand...
Click to collapse
MTP sucks too. It was much faster to transfer files in HC using USB Mass Storage mode.

You might want to try TeraCopy if you have a PC. Set it as the default handler for file management/file explorer and transferring data should be much faster. Good luck.

raduque said:
MTP sucks too. It was much faster to transfer files in HC using USB Mass Storage mode.
Click to expand...
Click to collapse
I wouldnt know, I only use adb to transfer files and, to my knowledge, MTP doesnt affect that.
But yes, mass storage is always preferable to any other sad excuse for filetransfer (if not using adb, that is)

I have noticed this as well. Always chalked it up to the fact I was moving files to an external MicroSd card.

use wifi and ftp sharing mode (file expert)

I think I've read somewhere here in this forum before that the problem in the slow file transfer occur because of the honeycomb file system which i think it's the same as ics. you can search about this .
For me this is very annoying , usually I mount my sd card in laptop and copy my files because this is much faster than copying directly to the tablet via usb. With my galaxy note i do not need to do that , Note's MTP is very fast.

Heh funny thing.. I reformatted my PC yesterday, now I cant get speeds higher than 2MB/sec using adb, compared to at least 4MB/sec before
**** knows whats wrong, as Im using the same usb port and drivers as always

microsd card

hi i just got the sandisk extreme 64gb microsd card.
suppose to be 30mb/sec right?
but when im transfering video files from PC (win8/64bit) to phone via usb3 ports/cable to card, a 4gb content is showing to be completed in 50min..
this cant be correct.. right?
the actual time that its transferred across is more like 20min.. but still it should be faster right?
i had it on usb debugging as well.
is there something wrong with my setup?

aliguu said:
hi i just got the sandisk extreme 64gb microsd card.
suppose to be 30mb/sec right?
but when im transfering video files from PC (win8/64bit) to phone via usb3 ports/cable to card, a 4gb content is showing to be completed in 50min..
this cant be correct.. right?
the actual time that its transferred across is more like 20min.. but still it should be faster right?
i had it on usb debugging as well.
is there something wrong with my setup?
Click to expand...
Click to collapse
Did you put the phone in usb 3 mode

aliguu said:
hi i just got the sandisk extreme 64gb microsd card.
suppose to be 30mb/sec right?
but when im transfering video files from PC (win8/64bit) to phone via usb3 ports/cable to card, a 4gb content is showing to be completed in 50min..
this cant be correct.. right?
the actual time that its transferred across is more like 20min.. but still it should be faster right?
i had it on usb debugging as well.
is there something wrong with my setup?
Click to expand...
Click to collapse
might be the card.. i transfered 3 roms to my internal sdcard yesterday, about 3.9gb and it took like 7 or 8 mins

The speeds defined for cards are the best achieved by the manufacterer with an unspecified card reader, and only for contious r/w. The smaller the chunks the longer it will take, below 4 k at best around 2 MB.
In a HAMA USB 3.0 reader on a NEC/Renesas controller in an Elitebook 8560p I could achieve 20 MB read and 70 MB write, but as soon as the notebook was used for something else or smaller chunks the transfer rate drops.
The cable was only 20 cm long, with bad cables and other controller or Hubs in beetween it can get much slower, even if you use a HDD or SSD.
USB 3.0 is like USB 2.0 was in the first years slow and buggy, but if both controller and everything else matches it's fast then the 30 MB where USB 2.0 maxes out.
Test your µSDcard in an USB 3.0 reader using ATTO and you'll know how fast it really is.