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[Q] which sdcard class

hello
first thx to all dev's for developping some tweaks hacks roms for this androphone for the masses
so i' m planning buying a new sdcard ( mine sdhc is ko)
is it possible to know wich are the limitations ( data transfert) of the phone ( chipset) and wich class of sd should i buy : class 6 or maybe a good class10
is there any hardware bottleneck in what concern data rate transfert
thx
have fun
greets from Belgium

I would also like to know the same.
I am thinking about buying a class 10 card, since the one I am using currently only has class 4. When I am using app2sd+ currently, apps are started much slower then from internal memory (especially big ones like google maps).
Would a class 10 card even make a difference? Especially with app2sd+? Or is the phones hardware limited somewhere?

I would also like to know, would class 6 be enough or should i aim for class 10 ? I mean class 10 is also much more expensive.

I have a class 6 SD card and its great for me but this phone wont use it like others. I speedtested it on my phone with sd speedfix applied and it was three times slower than on SE X10 without sd speedfix.

Hi,
I use the cheapest class 10 card with 16 GB I found. Unfortunately it is not very quick in my galaxy 3. With SD tools I get a read speed of 4,6 MB/s and a write speed of 5,3 MB/s. So may be I was betrayed from seller.
I tried to increase speed by setting the read_ahead_KB with SD speed increase. I noticed that increasing the buffer did not enhance speed. But when I set buffer to 0 suddenly read speed increases to about 40 MB/s.
I set SD speed increase to change the value to zero at every startup and now I do not have any more problems with lagging with videos. So it seems not just to be an effect in the app SD tools.
CU
donny

Is somebody trying MICRO SD SDHC 4GB 4 GB SAMSUNG "PLUS" CLASS 6?

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

Load times

So I have installed a few games (portal, Half Life etc) and moved them to the external SD card but the load times are pretty bad. They are pretty bad of the internal flash as well actually.
So I'm considering rooting and using foldermount to put the games on USB 3 hard drive I have plugged in. Has anyone tried this and if so did it speed up load times, or am I the first to test?

I have 64gb silicon class 10 micro SD card with upto 90mbps read I have no problem with the load times or lag as a matter of fact I couldn't even tell the difference between Internal storage and micro SD card loading times only buy class 10 micro SD
Sent from my SM-N910T using Tapatalk

I have a class 64gb class 10/Sandisc and the read is about 35 but the write is shocking at about 6. I've linked to external usb3 hd now and getting sustained 80 read and 50 write. I tested the internal nand as well and that was 200 read and 50 write. It really depends on the game though. Half life 2 has pretty bad load times reagardless of where its installed. I'm beginning to think it's just poorly optimised game. Doom 3 has no issues.

Yes I am talking about half life 2 and all the games I downloaded
Sent from my SM-N910T using Tapatalk

Strange Half life 2 takes 30 sec plus to load for me initially and when moving between levels in the game. I don't think it's specific to my device lots of reviews I read mentioned the long load times. I'll try a full flash when the next version of the firmware comes out. I've rooted but not installed anything exotic lol

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

UHS support for sd card

Does the SD card slot on the Axon 7 use UHS? U1 or U3?
For some reason I can't find a good answer with google. Maybe because it doesn't?

It will still work. You just might not get full speed.
I wouldn't buy anything other than a 128gb UHS card today for a phone. Even if not fully supported in my current phone. It will be in the next phone.

Bro, I tested my friend's Sandisk Extreme plus v30 on the Axon 7 and it performed better on Axon than the S7 edge
(This Microsd card is hella fast btw, it is the fastest for random Iops, even faster than uhs-II for random and the 2nd fastest for sequential) I tested it with Androbench and the read speeds were like 85-90 and the writes were 60-70 (I am talking megabytes per seconds!) and with other benchmarks that are lighter, it passes 100 on sequential read and 70 on write. So it definitely has Uhs-I u3 support since v30 is a higher rating since it has better random iops and designed for 4k recording, my extreme v30 is less impressive than the plus though =)
Speed may vary when flashing, I didn't flash anything because the card is not mine >_> but on my sandisk extreme v30 it can backup 435MB worth of data in 10 seconds