i have aproblem, my phone became recently a bit slow while downloading(torrents), i couldnt watch a yt vid(because it wpuldnt buffer, its not my internet connection that is bad and torrent didnt even took half of my bandtwith) so i did a benchmark, with some disturbing results:
sequential writing speeds: 3.74 mb/s
random writing speeds: 0.16 mb/s 42.01 iops(4k),
these benchmarks were done by androbench, they gave a ttop 10 list where there is a device with the same soc with over 15k iops random write speeds.
can this problem be solved with software or is the memory chip broken? Will a custom rom help?
Related
Anyone else experiencing excruciatingly slow USB file copying on Froyo? I've got a Class 6 16GB SD card in my phone and it's copying big files from my Macbook Pro at about 0.5MB/s.
It's driving me up the f***** wall, with a 1.2GB file predicted to take 27 minutes to copy across. Have I done something stupid to either my Mac or the phone? There's never been a problem in the past, but this is the first time I've tried copying with Froyo.
* Tried restarting phone and Macbook
* Turned off USB debugging on phone
Cheers,
Dave.
I've got a class 6 8gb card and transferring files from windows 7 goes at about 500 kb/s to 1mb/s. Extremely annoying.. Running froyo FRF83
Got a class 6 and it's going about 2.2 MB/s, I'd like to see it go faster too.
Hi ,
I have exactly the same issue , everything was fine with 2.1 ...
Need to test with CM6.0 when out maybe ?
No issue here moved 600MB in a few minute
same problem....
No clue why...but it limits speeds o ridiculously slow rates.
Get a card reader. Much faster even when you include the time to take out battery and remove/insert card.
same problem.
TEST using NexusOne with Cyanogen 5.0.8 (eclair 2.1): (stock SD card)
file size : 194 MB
time : 2 minutes 15 seconds (= 135 seconds)
194/135 = 1,44 MB/s
TEST using Nokia N97: (same SD card used before)
file size : 194 MB
time : 1 minute 08 seconds (= 68 seconds)
194/68 = 2,85 MB/s
Any news about this ?
Nexus One transfer speed smells like USB 1.1....
double post, sorry.
xManMythLegend said:
No clue why...but it limits speeds o ridiculously slow rates.
Get a card reader. Much faster even when you include the time to take out battery and remove/insert card.
Click to expand...
Click to collapse
this is inacceptable!!! do i have to turn off the phone each time? is it a joke?
on my old and stupid nokia 5800 the transfer rate was triple or more....
The thing is, it used to be quick.
David Horn said:
The thing is, it used to be quick.
Click to expand...
Click to collapse
what?
can you explain better what you mean?
_PeTiT_ said:
what?
can you explain better what you mean?
Click to expand...
Click to collapse
Uh, before 2.2 it used to transfer files about twice the speed it does now. I thought that seemed pretty obvious from "it used to be quick".
Just done a test using the same MicroSD card.
Hero (1.5): 5MB/s
Nexus One (2.2): 1.5MB/s.
I was syncing music via media monkey and it took AAAAAAGES so I assumed it was just the program. it's possibly due to how ur computer identifies it
anyone with froyo final? was been fixed?
I have had problems with my Touch PRO with the stock rom running SPB Mobile Shell 3.5.3(and earlier versions). 16gb class 6 card. After reformatting the card I can transfer some files to it fairly quickly, but after a while when i try to transfer files to it they will drop to insainly slow speeds like 16kb/sec.
I'm having this problem with the final release (FRF91) on my N1. USB transfer speeds are super slow 1MB/s. I think on Android 2.1, it was at least 5 times faster. When I transfer files now from my computer, it seems to transfer in bunches and then pause for several seconds. I have a 16GB class 6 card. Did anyone figure out a cause/solution to this?
*Bump*
I have the exact same issue with Froyo (FRF91). Before, on 2.1, I got transfer-speeds (write to sd) of 5+ Mb/s on my sandisk 16 gb class2, now it seemes to somehow be "capped" to the class2-speed of ~2 Mb/s (write). Not many post about this "problem" though, are there only a certain amount of phones that has this problem, or maybe every one else is using faster sd-cards, hehe
/Dan
daffyno said:
this is inacceptable!!! do i have to turn off the phone each time? is it a joke?
on my old and stupid nokia 5800 the transfer rate was triple or more....
Click to expand...
Click to collapse
Yeah, it is pretty bad. Transfers over the USB cable are capped at something like 2MB/s or something similar to that I believe though don't quote me on it.
I believe it is the hardware and not a software issue.
when I copy big files, let's say, a file more than 10 mb in size, the average transfer rate is 1.5mb/s
otherwise depends on size of file, if the file is very small, few kb, then the transfer rate is unacceptably slow, 300kb or 400kb/s or even worse.
also I found, if I use SD card reader, the transfer speed can be doubled.
My SGS was bought back in September. A new one (feb '11) was in my hands a few days before and I saw constant write speed of around 9 MB/s on internal SD. Mine usually does 6-7 MB/s. Are new ones faster?
No cache involved: big files and overall speed
Same 6-7 MB/s.
I think is a very normal speed.
Can anybody with a new one (January or newer) test it?
Connect as a Card Reader and transfer big files (500 MB should be fine)
If using Windows, wait for the transfer to complete in order to see the real speed
not a valid comparison.. empty file systems have higher speeds you need to have the same amount of crap on there.. even that may not do it depending on fragmentation.. really need to start empty on both and do tests.
@MOD
Please move this thread to the General Forum
Sorry
I thought I knew which was the decisive thing about SD card compatibility/performance with WP7.
Random access time, as most would jump to say, but apparently this theory proves to be wrong in practice... or maybe I'm missing something
Card A
Transcend class 6 - 4GB
Random R/W: ~5.1 MB/s (read)/ ~0.025 MB/s (write)
Card B
Transcend class 6 - 8GB
Random R/W: ~4.6 MB/s (read)/ ~0.040 MB/s (write)
In short, despite having slightly better CrystalDisk Mark Random Write results, Card B performes MUCH WORSE on my HD2 running Mango than Card A!
I mean 3-5 minutes to download and install an app from Marketplace (eg. Accuweather, Appflow, etc.), while the other one does it in max. 30 seconds!!!
Until the progress bar reaches to 50% the speed is about the same but from then on, Card B stuggles to finish (I assume the bar shows the download progress in the 1st half and the install progress in the 2nd half)
A few notes:
- the underperforming card was checked for errors with Easeus Partition Manager and it has none, also no bad sectors;
- both cards were tested in the exact same conditions, both formatted the same way and on the same PC, both tested on the same phone, etc.;
- the testing sequence was as follows (every single time): phone off > format sd card > hard reset > connect to wifi > sign in > download apps;
- the experiment was repeated several times, always having the same outcome.
So what could possibly be the explanation for this?
Is it not the Random Accesss Time the key criteria we are looking when choosing a good SD card for our phones? If it is, where did I go wrong?
If not, what is it then?
There's a difference between random read/write speeds and access times/random access times. Saying 4.8mb/sec is the speed rating, but I've found cards with similar ratings there can still have very different random access times, which is rated as 8 milliseconds or 15 ms, etc. The random access time is how long it takes to initially read a random bit of data, instead of how much data it can access in a second once it gets started reading, which is the read speed. 2 very different ratings, and I've never found a app that gets both ratings so I always used a 2nd app when testing cards... I'll post it once I remember the app I always used.
Not sure which is more important, and not sure what other things are also important for a good card for wp7, but from what i can tell from my tests several months ago was that it seemed to me the access time seemed more important in telling a good wp7 card, but it seems that theres probably other factors we don't know yet are important, too.
Hello, Optimus Black community!
I've bought my OB a week ago, and updated it to open eu v30b. I've seen that many people has random sd unmount, but haven't found anyone who wrote about usb transfer speed. With GB, transfer speed is ok, minimum 2MB/s, but after update, slowed down to 100-150KB/s MAXIMUM! The phone got a class 4 8gb kingstone sdhc. So my question is: slow usb transfer speed between my pc and my phone is sd related, or it is a kernel/sw bug? Earlier I had a P500, and there the GB update had same bug with transfer speed, and after a kernel change, speed problem was solved.
i think this is software or kernel related.
with GB i had transferrates up to 12MB/s and normaly about 6-9 MB/s depending on Data transfered to device (some big files / many smal files).
with IZS i had only transferrates about 2-3 MB/s
on JB i had the same slow transferrates with configuration as massstorage device. Configured for MTP Transfer the speed is much better, but the transferspeeds are not shown in Windows.
P.S.: my sd-card is a Samsung 32GB Class10
Phones from other brands apparently have also suffered from slower speeds on ICS.
See for instance this thread, where the issue was solved by using a different kernel: http://forum.xda-developers.com/showthread.php?t=1443594
I have this problem... please help
Hi, I experience something that I consider a very strange problem.
I recently bought a Mi 9 and discovered that its USB-typeC is only USB 2.0. This is rather disappointing, but USB 2.0 should still give 480 mbit/s = 60 MB/s transfer speed.
However, the real USB file transfer speed from PC to the phone is only 27 MB/s.
I've tried everything - MTP/PTP, adb, running FTP server on the phone through "usb modem" network.
I even setup Linux hostapd on my laptop which has 802.11ac with an Atheros chip, connected the phone to that network and got 780 mbit/s theoretical speed.
Then I started an FTP server and retested: still 27 (maybe 28-29) MB/s to the phone. At the same time, it reached the speed of 65 MB/s (=520 mbit/s) when copying a file FROM the phone to the PC.
Then I even launched Terminal emulator and started a download from the PC to the phone with `curl`. And guess what, I still got 27-30 MB/s. Even when it's downloading the file to /dev/null instead of the phone's flash memory - it still gives 27-30 MB/s.
Then I launched THREE curl's at the same time. Three of them gave me 30+30+20 MB/s = 80 MB/s = 640 mbit/s which means that my 802.11ac worked correctly.
So my question is: what is that fixed limit of 30 MB/s per process?
And what file transfer speeds do you get with your Mi9's?
vitalif said:
Hi, I experience something that I consider a very strange problem.
I recently bought a Mi 9 and discovered that its USB-typeC is only USB 2.0. This is rather disappointing, but USB 2.0 should still give 480 mbit/s = 60 MB/s transfer speed.
However, the real USB file transfer speed from PC to the phone is only 27 MB/s.
I've tried everything - MTP/PTP, adb, running FTP server on the phone through "usb modem" network.
I even setup Linux hostapd on my laptop which has 802.11ac with an Atheros chip, connected the phone to that network and got 780 mbit/s theoretical speed.
Then I started an FTP server and retested: still 27 (maybe 28-29) MB/s to the phone. At the same time, it reached the speed of 65 MB/s (=520 mbit/s) when copying a file FROM the phone to the PC.
Then I even launched Terminal emulator and started a download from the PC to the phone with `curl`. And guess what, I still got 27-30 MB/s. Even when it's downloading the file to /dev/null instead of the phone's flash memory - it still gives 27-30 MB/s.
Then I launched THREE curl's at the same time. Three of them gave me 30+30+20 MB/s = 80 MB/s = 640 mbit/s which means that my 802.11ac worked correctly.
So my question is: what is that fixed limit of 30 MB/s per process?
And what file transfer speeds do you get with your Mi9's?
Click to expand...
Click to collapse
im not so technical with specs of write/read speeds but, at least i can say the same, mine to transfer around 6GB takes about 30 to 40 minuts so, i guess is around 25 to 30 mb/s, USB 2.0 on a phone this good is the only downside to have a phone without microSD slot to compensate the slow USB 2.0 speed, or worse than that.
sun_is_shinning said:
6GB takes about 30 to 40 minuts
Click to expand...
Click to collapse
It's worse. 6000MB/(30*60) = 3 MB/s...
With 27MB/s it should take ~4 minutes to copy a 6 GB file...
And it should be even more, most usb 2.0 sata enclosures max out at 50-60 MB/s...
vitalif said:
It's worse. 6000MB/(30*60) = 3 MB/s...
With 27MB/s it should take ~4 minutes to copy a 6 GB file...
And it should be even more, most usb 2.0 sata enclosures max out at 50-60 MB/s...
Click to expand...
Click to collapse
and i am talking about 6GB of more than 1300 pictures with ~3 to 5mb each so, probably will take more cause is not a single file.
i dont know wich method you use but i connect my phone and select MTP not PTP.
evenm its so damn slow, i regret the speed i can go with my G6 wich have usb 3.1 and thats was amazing quickly compared to Mi9.
i dont know why Xiaomi dont implement usb 3.1 on their high end models, they can make it, and even if we need to pay 10 to 20 bucks more is way way better than waste a lot of time copying files into it. - since they didnt provide microSD eighter.
My redmi note 9 also slow transfer speed but it solved now, on PC I compress all the files, transfer compressed file to the phone the extract it on the phone.
vitalif said:
This is rather disappointing, but USB 2.0 should still give 480 mbit/s = 60 MB/s transfer speed.
However, the real USB file transfer speed from PC to the phone is only 27 MB/s.
Click to expand...
Click to collapse
That is the THEORETICAL MAXIMUM that USB 2.0 can achieve. In practice, NO USB 2.0 drives, I repeat, NO USB 2.0 drives ever reach that speed. The fastest one reaches only 42MBps sequential write speed and is an externally powered hard drive, while the fastest flash drive only reaches 25MBps sequential write speed (data taken from usb.userbenchmark.com, so it's sourced from multiple real world users instead of a controlled lab environment). Your 27MBps then is already a good one.