Database Users

Micro SD Class 10 Speed Tests

I'm having issues with my micro SD card. Its a 16GB class 10.
I noticed lately that my benchmark tests the sd speeds are around - Writing 8.5 MB/s and Reading 14.6 MB/s.
This is far from normal values and other tests I have made.
I have formatted the card and preform several speed tests using my PC and the card is working perfect.
Minimum I got was writing 14.3MB/s and Reading 17.8MB/s.
All other values were superior.
So card is working well as always was, but apparently de benchmark results on mobile are showing very low values and far from a standard Class 10 values.
could there be a problem with my device?

Nope, as you noted in the MIUI thread, when you overclocked your device that copying increased in speed. The device just may not be able to keep up with the card to a certain extent.

But I always got higher values,e.g., writing above 12 and reading above 17 with this card in this device. Just now I started to have these low values.
My device just came from official repair due to a cashed screen and I'm getting suspicious they have done something. Is it possible?

Highly doubtful, maybe its just getting worn out?
Mines a A-data class 6 and it was writing at 8MB/s when I got it, now I'm lucky to get 4MB/s

The card is just 1 month old... Besides if I test it in my PC the results are just fine and normal

Is it possible to check another SD with same format? maybe from mates?

the tests I mad on my PC the results ar normal but I have tested my card in other phones, Samsung Galaxy S2 and Samsung Galaxy Ace and in both the results are horrible.
Samsung Galaxy Ace
Writing speed 6.4
reading speed 14.3
Samsung Galaxy S2
Writing speed 8.8
reading speed 15.4
What the **** is going on here that I can't find a common sense for this behavior?

Results are generally lower on phones when benching sd cards.
Did you try tinkering with sd-booster to increase your results?

but before I got normal results with phone benchamrks:
writing 12-15
reading always up 17
Using same phone and same card and the results got very poor.
If I test the sd on my PC the results are normal but in the device got very low

Firstly format your card with phones formatter then Download sd formatter on pc and format your card with it by putting it in sd card reader
Then test your sd card in phone again
Sent from my IDEOS X5 using xda premium

Speed on pc depends on settings. if write cache is enabled the speed is a lot improved. Mine in other hand with pc i got 4 times lower value than with my phone. It was les than 4MB/s of writing, but my laptop is 5 years old. but speed is kinda good anyway, but i'm using WinXP, and other ****ty newer windows versions i think uses write cache so the file physicly is not already written but windows shows it is...and if you pull card you'll get write delayed error... anyway..there is no 100% accurate method to test it..in home environment.

shantam said:
Firstly format your card with phones formatter then Download sd formatter on pc and format your card with it by putting it in sd card reader
Then test your sd card in phone again
Click to expand...
Click to collapse
thank you
Did this and actually inproved the writing speed of the card.
Several mobile Benchmark tests and values always around 11.1 and 11.9 but even then far from normal which is 14
One thing I also noticed and never mentioned. As higher the CPU OC lower the score of SD card writing. So 800mhz much better than 1.5Ghz and so on

transcend is the Best
Guys , i have been using a Transcend Class 6 card for past 2.5 years ..
No problems yet plus superb perfromance ...
Write speeds : 8-9 Mbps
Read :Around 14-15 Mbps...
I think its the winner in this category ...

So old thread...............
Sent from my U8800 using Tapatalk 2

Druida69 said:
This is far from normal values and other tests I have made.
Click to expand...
Click to collapse
...which are? When did the behaviour change (changing ROM or...)?
XphX

XphX said:
...which are? When did the behaviour change (changing ROM or...)?
XphX
Click to expand...
Click to collapse
You quote 7 months old post???
Sent from my U8800 using Tapatalk 2

Qqqxxxzzz said:
You quote 7 months old post???
Click to expand...
Click to collapse
It was ajithmemana bringing the post back from the dead - I did not have a look at the date.
XphX

Is there any problem answering to a 7 months old topic?
Should he start a new topic stating "I'd just like to reply to that a post on a old topic, so here it goes..."
LoL

VuDuCuRSe said:
Is there any problem answering to a 7 months old topic?
Should he start a new topic stating "I'd just like to reply to that a post on a old topic, so here it goes..."
LoL
Click to expand...
Click to collapse
No, but he asked question and quoted from "account currently disabled"-guy.
Sent from my U8800 using Tapatalk 2

MicroSD Duel: Sandisk Class 10 vs Samsung UHS-1

Hello,
I happen to have 2 fast microSD 64 gigabyte storage cards, and decided to run a benchmark test on each, using my International Galaxy Note II model GT-N7100. I thought there might be some interest on the forum in whether there's any significant performance difference between these cards on our devices.
The two cards are as follows:
- Sandisk Ultra Class 10 64gb microSD
- Samsung UHS-1 64gb microSD
Both cards are empty, and factory-formatted with the exFat file system. Prior to testing on my phone, I mounted each card in a USB 2.0 card reader attached to my Windows 7 laptop and did a full chkdsk with sector scan to verify the storage was as advertised and there were no problems. Both cards scanned as clean with no detectable problems.
My phone is running Android 4.1.1, using Samsung baseband N7100XXALJ2, kernel version 3.0.31-310959, with a build number of JRO03C.N7100XXALJ3.
This phone has never been rooted or flashed with a non-factory ROM.
The benchmarking program I chose to use was "SD Card Tester" version 1.0.5 as downloaded from the Google Play Store.
Each card was tested immediately after rebooting the device and waiting one minute for the system to fully stabilize. Power Saving mode was not active during these tests.
I ran each test 3 times. The results below are the average of the 3 tests per card.
Sandisk Ultra Class 10 (64gb) results:
13.68 MB/s read, 10.26 MB/s write
Samsung UHS-1 (64gb) resuts:
32.8 MB/s read, 14.65 MB/s write
I hope some of you find this information useful. If anyone has questions or suggestions for other ways to compare these storage options, let me know.
Sent from my GT-N7100 using xda premium

interesting..

Samsung :good:

I'm getting different results but with 32gb SanDisk class 10

Thx for that
Sent from my GT-N7100 using xda premium

I was getting worse results with my phone but considering the Sandisk only cost $40 I'm not overly concerned. So long as it doesn't die on me. The Samsung card is like double the price of the Sandisk.

Well, I've got a bit of a disappointing update as I've continued to work with these cards today.
Once you load up these cards with data, a lot of the performance advantage for the Samsung appears to go away.
I now have both of these cards about 33% full (same directories and files on each), and I'm finding no more than 1.5 to 2.5 MB/s measurable difference, either in writing or reading. Although the Samsung has remained the fastest in every test so far, it really isn't much of a difference at this point.
I'd like to understand why the Samsung card appears to suffer more of a performance drop than the Sandisk as the cards fill up, but can't hazard a guess right now.
The small differences I'm now seeing, both in tests as well as normal usage, certainly do nothing to justify the premium price of the Samsung card, IMO.
Sent from my GT-N7100 using xda premium

My results

ronj1986 said:
My results
Click to expand...
Click to collapse
Couple of comments:
1) You need to bump up the size slider to about 2150MB to get a reliable result. As you move the slider, a colored pop-up will turn green when you have reached a size that should yield "excellent" results.
2) Unless you have somehow swapped the internal & external storage cards on your device, your screenshot appears to show the results of testing your internal card rather than your external one.
If 2) is the case, here is a graphic showing how to select your external card (it can be somewhat tricky with this app, especially the "tap" called for in step one - I often have to double-tap rather than single-tap, and it usually doesn't work the first time or two I try it...).
Sent from my GT-N7100 using xda premium

New disappointing results

My 64gb class 10 SanDisk results:

TJCacher said:
Well, I've got a bit of a disappointing update as I've continued to work with these cards today.
Once you load up these cards with data, a lot of the performance advantage for the Samsung appears to go away.
I now have both of these cards about 33% full (same directories and files on each), and I'm finding no more than 1.5 to 2.5 MB/s measurable difference, either in writing or reading. Although the Samsung has remained the fastest in every test so far, it really isn't much of a difference at this point.
I'd like to understand why the Samsung card appears to suffer more of a performance drop than the Sandisk as the cards fill up, but can't hazard a guess right now.
The small differences I'm now seeing, both in tests as well as normal usage, certainly do nothing to justify the premium price of the Samsung card, IMO.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Can this be corroborated?

SANDISK Micro SDXC 64 Go
Writing : 17,06 MB/s
Reading : 31,35 MB/s

Karlfox said:
SANDISK Micro SDXC 64 Go
Writing : 17,06 MB/s
Reading : 31,35 MB/s
Click to expand...
Click to collapse
How full is the card

SD Card is So Freaking Slow!

I have a PNY U3 Turbo Performance 64GB High Speed MicroSDXC Class 10 UHS-I, up to 90MB/sec Flash Card. It seems to get slower with time. I mean it is literally taking me like 60 seconds to delete a few pictures. The card is formatted to portable storage. I only store music and photos on it. Reformatting offered no improvement. It is borderline unusable.
So, I benchmarked and found that my read speed is about 59 mb per sec and my write speed is 4.4 mb per sec. I can live with the read speed but the write speed is horrible. What gives?

How many pictures are you talking about, and how large are they?

128KB clusters?
I found trying to use 4K clusters in exfat was resulting in the same slowness. Reformatted to 128KB clusters and it flys (~20MB/s write ~70MB/read). Sandisk ultra plus 64GB.

I have this issue as well I have one of the fast Samsung cards. First few months worked great super fast but now takes a while to carry over a gig of pics and music. I also notice lag in loading and delteing photos through the phone

These are normal pics 5-6 MB. There has to be something wrong.

Irieone said:
These are normal pics 5-6 MB. There has to be something wrong.
Click to expand...
Click to collapse
If you find any info/solution let us know.
Im thinking about running it through one of the tests that show the read/write speed, if its not up to par on that I will contact samsung see if its covered under their warranty.

Why not opt for a 128GB sd card? My Moto X Pure will be here Thursday. I have a 64GB in my old phone but I may get 128.

Has the OP tried backing up their data and reformatting the card?

gpz1100 said:
Has the OP tried backing up their data and reformatting the card?
Click to expand...
Click to collapse
Yes, I have tried this a few times and it did not help. The write speed of this particular card is somewhere between 5 and 9 mb/sec. I have used multiple benchmarking tools that all confirm the same thing. The sad thing, if you drill down into the specifications for a lot of these new sd cards there is no mention of write- speeds. I asked a question similar to my OP on Reddit and had somebody with the same card echo my issue. Terrible write speeds. I am not in the mood to buy another card with great specs only to find it performs poorly in my phone? There is still a part of me that thinks it's hardware or software related and specific to the phone. I can't quite believe that something advertised as "turbo", UHS-1, Class 10, and 90 mb/sec has an actual write speed of 5 mb/sec. It seems criminal.

^^See my post #3. I've found this card to have very good write speeds on the phone of ~14-16 MB/s, reads around 40-50. On the pc through a usb 3 card reader I can write at the speeds posted above.
But yes, unless you drill down, the marketing and advertising doesn't list write speeds. I can see why. It all depends where you'll be using it. I'll be lucky to see sustained 10MB/s read through my dash cam (not sure what the write speed even is) even through the card is capable of 40MB/s +.
I should say, using the moto x, through MTP, I've seen read speeds upwards of 35-40MB/s, write speeds of about 7-10MB. The card is faster through twrp, backup stats indicate ~14-16MB/s.

http://forum.xda-developers.com/moto-x-style/general/micro-sd-speed-chart-t3196020

How fast is the SDcard slot compared to internal memory?

Hi, I'm currently thinking about popping an SDcard in my xplay and was wondering how fast the slot runs at?
I was thinking maybe I will be wasting my money getting the fastest card on the block if the slot speed is slower than the SD card.
Also am curious in the difference in speed of the internal memory compared to the fastest speed of the sd card.
If anyone has any info on the above would be grateful for your input.

rockyrobin said:
Hi, I'm currently thinking about popping an SDcard in my xplay and was wondering how fast the slot runs at?
I was thinking maybe I will be wasting my money getting the fastest card on the block if the slot speed is slower than the SD card.
Also am curious in the difference in speed of the internal memory compared to the fastest speed of the sd card.
If anyone has any info on the above would be grateful for your input.
Click to expand...
Click to collapse
I've just borrowed an SDcard out of another phone (Samsung evo (yellow)) and benchmarked against the internal SD card and got the following scores:
External - (read) 34.36MB/s, (write) 20.0MB/s
Internal - (read) 89.76MB/s, (write) 53.35MB/s
Has anyone found an SDcard that is as fast as the internal?

rockyrobin said:
I've just borrowed an SDcard out of another phone (Samsung evo (yellow)) and benchmarked against the internal SD card and got the following scores:
External - (read) 34.36MB/s, (write) 20.0MB/s
Internal - (read) 89.76MB/s, (write) 53.35MB/s
Has anyone found an SDcard that is as fast as the internal?
Click to expand...
Click to collapse
I don't think there are sdcards available with the same read/write speeds as internal. On my old moto g with LP ROM I always installed big games to my sdcard using apps2sd and the only difference i noticed was that it takes a little longer loading an app.

Sickaxis79 said:
I don't think there are sdcards available with the same read/write speeds as internal. On my old moto g with LP ROM I always installed big games to my sdcard using apps2sd and the only difference i noticed was that it takes a little longer loading an app.
Click to expand...
Click to collapse
I was just looking at the benchmark results database for the "a1 SD benchmark" app and there are a few submissions that encourage me to think it may be possible with a card like the Samsung Pro series which can do around 80r/70w MB/s. Only thing that has me wondering is whether the card interface would be a bottleneck?

rockyrobin said:
I was just looking at the benchmark results database for the "a1 SD benchmark" app and there are a few submissions that encourage me to think it may be possible with a card like the Samsung Pro series which can do around 80r/70w MB/s. Only thing that has me wondering is whether the card interface would be a bottleneck?
Click to expand...
Click to collapse
It also depends on the phone I guess as to how much speeds it can reach.
Automated reply by JARVIS

Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?

rockyrobin said:
Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?
Click to expand...
Click to collapse
Not neutered - All SD card interfaces are slower than the actual memory built in to the phone, this is right across the board for all phones. It's a known bottle neck that's a fact of life. That is the biggest thing in favour of more memory in the actual phone. I'm not a gamer but I have a ton of apps installed on the SD card and don't find any negative impact on day to day use. That said if I could have bought a 32 or 64GB version of the Play I would have instead of the 16GB version.
Your never going to see the tested speed in the phone equal the SD card out of the phone.
Sent from my XT1563 using Tapatalk

rockyrobin said:
Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?
Click to expand...
Click to collapse
http://forum.xda-developers.com/moto-x-play/help/wich-sd-card-t3237228/page2

Which SDcard?

Right I have a class 10 32gb card which I'm using as internal but any apps that are on it stutter and lag, if I buy another 32gb or 64gb like sandisk U3 will it be fast enough so that my apps don't lag?

What are the specs of the u3?

I was just about to put up my own post about this. I have a 64gb sandisk xtreme SD card. Only bought it a few weeks back for £35 I think it was. I'm having major problems. If I try deleting some stuff from the SD card using say es file explorer it takes a really long time to do it. Even deleting an empty folder it take wayyy too long. Also if I try downloading files straight to my SD card using say google drive or a torrent program it locks the phone up completely and I have to keep resetting the phone to get it to become responsive. Really annoying. If I get some spare time I will flash the stock xt1572 firmware and try it if not I will have to contact MOTO UK and try and sort it. But I'm hoping they will sort a replacement phone so I don't have to send off for repair....?
Sent from my XT1575 using Tapatalk

nathlynn22 said:
I was just about to put up my own post about this. I have a 64gb sandisk xtreme SD card. Only bought it a few weeks back for £35 I think it was. I'm having major problems. If I try deleting some stuff from the SD card using say es file explorer it takes a really long time to do it. Even deleting an empty folder it take wayyy too long. Also if I try downloading files straight to my SD card using say google drive or a torrent program it locks the phone up completely and I have to keep resetting the phone to get it to become responsive. Really annoying. If I get some spare time I will flash the stock xt1572 firmware and try it if not I will have to contact MOTO UK and try and sort it. But I'm hoping they will sort a replacement phone so I don't have to send off for repair....?
Sent from my XT1575 using Tapatalk
Click to expand...
Click to collapse
i read that formatting the sdcard to xeFAT at 128kbs cures that Nath

lafester said:
What are the specs of the u3?
Click to expand...
Click to collapse
The Sandisk Extreme U3 Up to 90/40 MB/s read/write speeds for faster recording and transfers

Here's the 'official' specs: https://www.sdcard.org/developers/overview/speed_class/index.html
I think the Sandisk Extreme Pro is the fastest card out right now, the Transcend Ultimate 633x is just about as fast, and is cheaper.

BackDaws said:
i read that formatting the sdcard to xeFAT at 128kbs cures that Nath
Click to expand...
Click to collapse
BackDaws said:
The Sandisk Extreme U3 Up to 90/40 MB/s read/write speeds for faster recording and transfers
Click to expand...
Click to collapse
TXJim said:
Here's the 'official' specs: https://www.sdcard.org/developers/overview/speed_class/index.html
I think the Sandisk Extreme Pro is the fastest card out right now, the Transcend Ultimate 633x is just about as fast, and is cheaper.
Click to expand...
Click to collapse
I will have to have a look but its not right. Only phone I have had problems. The LG G4 I used it on worked fine. And works fine in my Z2 Tablet. I will have to try reformat it or I'll contact MOTO I guess. Thanks
Sent from my XT1575 using Tapatalk

Just a note that the phone doesn't support the second row of pins for UHS-2 (U3), so you're limited to UHS-1. Of course, the card could still be fast enough to max out UHS-1, but maybe not.
You could also look at changing the I/O scheduler for the SD card in Kernel Adiutor to something more suitable for SD, and playing with the read-ahead buffer to get better performance. Noop/512kB is a good starting point.
Also, why are the apps on the SD card? Shouldn't they be on the phone? Maybe use the external storage for non-time intensive things, like photos/music?
UPDATE, speed results from Sandisk 200GB MicroSD:
Seq Read - 79.85MB/s
Seq Write - 3.87MB/s
Random Read - 5.37 MB/s, 1377 IOPS
Random Write - 0.37 MB/s, 97 IOPS
SQLite Insert - 1192 TPS
SQLite Update - 664 TPS
Not the fastest card, but good enough for mass storage

My general consensus is that the apps will always be better on internal storage. Even if the phone can make full use of the U3 specs, it is still slower memory. Expect issues, especially with some apps.