Hi, I have a question. I have a class 2 sdcard (I think, and it's most probably true) which I partitioned with ext4 to use a2sd. I realised that my app-loading speed decreased tremendously. I think the reason is with my class2 sdcard, which can only support 2mbps data transfer. So I was wondering which class of sdcard I should buy for the loading speed to be almost or totally the same as if the app is installed on the phone.
atleast:- class 4
OK:- class 6
best:- class 10
Related
Hi al,
Does anyone know whether the Samsung Galaxy S (I9000) would actually profit from a Class 10 microSD? Can it utilize the read/write speed of these microSD's?
If not, what is the max. class which the Galaxy S would actually use to its fullest?
Greetings,
Evert
of course it will
this is one of the fatest phone ever
if you have an External class 4 vs another External class 6 card inside this phone then you copy stuff with Astro File inside the phone you'll notice the difference in speed
and then if you compare the class 6 vs a class 10 external you'll see even more difference
this will be very important when Froyo comes out and we can finally use App2SD, as the apps will write and load faster to & from the SD on a class 10 than a class 6 or 4
don't even bother with a class 2 it'll be painful slow
and that comes by experience running apps on SD on all my previous phones
AllGamer said:
of course it will
this is one of the fatest phone ever
if you have an External class 4 vs another External class 6 card inside this phone then you copy stuff with Astro File inside the phone you'll notice the difference in speed
and then if you compare the class 6 vs a class 10 external you'll see even more difference
this will be very important when Froyo comes out and we can finally use App2SD, as the apps will write and load faster to & from the SD on a class 10 than a class 6 or 4
don't even bother with a class 2 it'll be painful slow
and that comes by experience running apps on SD on all my previous phones
Click to expand...
Click to collapse
What?
Are you basing this on a test, or are you just assuming that the class 10 microSD is theoretically faster then class 6 ?
Biased on that tech specification your making an assumption that we should get this class 10?
The question is weather or not the SGS Vibrant Bus and Data lines can transfer speeds of 80Mbits/s through the MicroSD card slot??
* Class 2: 16 Mbit/s (2 MB/s)
* Class 4: 32 Mbit/s (4 MB/s)
* Class 6: 48 Mbit/s (6 MB/s)
* Class 10: 80 Mbit/s (10 MB/s)
I would say lets buy them and test it out.
I just had 6MBs towards my internal and 5MBs towards my external sd card at the same time trough the usb connector while the sd is a class 2 =p
The sgs would stil benefit from a class 10 i bet
I have just placed an order for a Kingston SDC10/16GB.
What would be an accurate way to measure read/write speed once this card is in my phone? Simply hook it up to PC and pump a large file to it, and see what the speed/bandwidth is?
when performing test, you will always get the fastest speed when the disk is new (empty)
so the proper way to test for performance speed, is to fill the SD card 50% with random files or random sizes, then do a speed test
that will show the true performance of the sd card
you can try these 3
http://www.appbrain.com/app/sdcardbenchmark/com.p8h.sdcardbenchmark
http://www.appbrain.com/app/sd-card-speed-tester/br.com.fast4ward.sdcardspeedtester
http://www.appbrain.com/app/disk-benchmark-free/com.j.diskbenchmark
Very interested in the results myself! Please do let us know how it goes evert!
Any results ?
I'll check them out. Problem is that most seem to test /sdcard, which is the internal SD, and not [correct folder for external SD]...
i also just wondering if class 10 would make any different in data transfer as rite now i'm using class between class 2 and class 6 for 3 of my 5300 (2) i9000 (4) and n7000 (6)..
any result on the test that you have made? thanks!
I use a transcend 16gb class 10 micro sd and i get a write speed of around 14mbps... on other cards i get 5 or 6mbps...
vigneshnallamad said:
I use a transcend 16gb class 10 micro sd and i get a write speed of around 14mbps... on other cards i get 5 or 6mbps...
Click to expand...
Click to collapse
Thanks for the info! Sure feel more confident to get one of these!! Thanks again (and yes i've click the thanks button!) Hehe!!
Regards!
For what it's worth, my speeds are as follows:
Internal: 7mb/s write and 15mb/s read
External: 15mb/s write and 30mb/s read
External is a Transcend class 10 16gb card, almost full and 1yo
Very happy with it
Sent from my GT-I9000 using xda premium
Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much
microSD compliant with SD2.0 Standard (aka microSDHC)
The biggest size available currently is 32GB.
I don't know if even more is possible with microSDHC or if bigger cards will only be possible with SD3.0 (aka SDXC) but that question is not relevant as you can't buy any greater then 32GB yet.
The Class of the SDCard is a measurement for guaranteed minimum speed in random read/write.
The Class does not provide any information about real-world speed or max speed.
For your mobile phone the class is a pretty useless criterion as you don't need any guaranteed minimum speeds but good overall speeds ESPECIALLY sequential.
The guaranteed minimum speed is important for HD Video Cameras for example where you write data all the time at a given speed (resolution).
thanks.
but I DO need class with high speed because I want to use Data2Ext...
Don't pick uSD card based on class !! class tels you MB/s for sequential write only... you need a card that is overall fast, I had 16GB class 10 Kingston and data2ext was just horrible!
Now I'm with class 4 Sandisk mobile ultra and it is in fact faster in every test I ran...
So read reviews before you buy
ye but that is exactly why im asking...
well then, I recommend sandisk mobile ultra as I have it and it is OK, there are probably faster cards...just see the small files read / write speeds in reviews those are of greatest importance
i purchased a kingston 8GB class 4 which crapped out. android kept reported sdcard unexpectedly removed. tried all sorts (formatting in windows, android, quick, long, etc).
RMA replacement did exactly the same, so i'm guessing kingston class 4's are best avoided.
If I recall correctly I have a 16GB microSDHC Class 4 card. After applying data2ext with this card, my Quadrant scores hit around 1500, which is crazy.
This is where I found my card: http://www.amazon.co.uk/SanDisk-16G...P06K/ref=sr_1_1?ie=UTF8&qid=1298984123&sr=8-1
I personally recommend this card.
witch is better class 4 or class 6?
r69001 said:
Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much
Click to expand...
Click to collapse
Did you by any chance go to HTC's website to read about the phone? It has the full specs listed..
Sent from my Legend using XDA App
dangal said:
witch is better class 4 or class 6?
Click to expand...
Click to collapse
class 6 is better , but class 10 is even better
I've got a Sandisk Ultra Mobile 16gb SDHC which works fine in the Legend. Make sure you format it with the phone to stop it being dismounted, well known issue and the fix
Greetings!
I'm looking at getting a class 6/10 microsdhc card for a2sd+, moving both dalvik cache and apps into the a2sd+ partition. my current LEXAR class 4 8GB sdhc tested at Write: 7MB/s and read 17.7MB/s by SDTools And 8MB/s write, 9.57MB/s read bt SD Card Tester. Can I expect better speed with class 6 or class 10 sdhc? I have been reading reports that speed doesn't go higher because the phone I/O interface simply could not keep up?
Which brand and model do you recommend?
The reports are most probably right, and going above Class 4 might give you nothing.
how disappointing... sigh..
While you may not notice a speed difference on the phone, you will certainly notice a difference when you use a card reader to transfer files. I have two cards: a 16GB class 6 Transcend and a 16GB class 2 SanDisk. The Transcend is noticeably and significantly faster when writing files to it via a card reader.
I had a Galaxy Ace wich I upgraded to my new Optimus Black. I bought a 8 GB Class 2 micro SD, OB came with 4 GB Class 4 micro SD. Would i feel the difference between both of 'em if i user 8gb class 2 again? I think i need more data storage
Not using a2sd or anything like that.
higher class = higher write/read speed
plus,if you like customize your rom, it's better if you have a >=6 class sd card
class 10 please , i have samsung 8gb class 10 and it`s not a big difference in price between 6 and 10
i got a 16GB class 10 from amazon for about 20€
Samsung MicroSD
Samsung MicroSD #2
agent205 said:
higher class = higher write/read speed
Click to expand...
Click to collapse
No. Higher class = higher minimum write/read speed.
You can try get a legendary Class 10 Micro SD with more than 8GB
Belive me, it will be your best upgrade purchase for the OB
Actually I have a Micro SD Adata Class 10 16GB. On my daily usage, I noticed better performance from games that requiere SD data storage and better speed for tranfer files via usb. On my experience, 1GB in 1:30min!!! Well that's when i'm transfer a unique .rar file, if you try with a folder of same size it takes a little more time
Another thing, if you're a gamer, trust me... you must get a 16Gb micro SD at least, because the heavy graphics games (like newest Gameloft Games) have very heavy quantity of data. Only with the downloadable data of Nova2, Asphalth 6, MC3, Street Fighter IV, FIFA12 and Real Racing2 you fill a MicroSD 8GB!!! D: but they are very good games ;D
Well, I hope this info will help you and if I was on your shoes... I hurt you!!! XD jajaja just kindding but seriously think about grab a better SD class with more than 8Gb ok... well you have the better choice. Regards from Mexico
PD. Sorry about my bad English T-T
defintely use higher class (min. class 6)... you will gain a benefit when loading/copying large amount of data. agree with above.
Class - Speed
2 - 2 MB/s
4 - 4 MB/s
6 - 6 MB/s
10- 10 MB/s
SourDieselTHC said:
Class - Speed
2 - 2 MB/s
4 - 4 MB/s
6 - 6 MB/s
10- 10 MB/s
Click to expand...
Click to collapse
Those are the minimum speeds, the class doesn't say anything about maximum speeds. It is possible for a lower class card to reach higher speeds than a higher class card. It should not be possible for a card of a given class to go slower than the class minimum.
I had the common lag in camera recording...when I changed to samsung 32GB class 10 all went fine , that was still in froyo. I got it for only 27€ in an spanish online shop called "pccomponentes".
Great deal..3 months so far and all running well.
The Classes are the speed to write on SD, If You have a class 4 is better than 2, but maybe is more expensive.
sarremiro said:
I had a Galaxy Ace wich I upgraded to my new Optimus Black. I bought a 8 GB Class 2 micro SD, OB came with 4 GB Class 4 micro SD. Would i feel the difference between both of 'em if i user 8gb class 2 again? I think i need more data storage
Click to expand...
Click to collapse
It's a good dilema, space vs speed. As others have said if you are a gamer go for speed. If you just have music a pictures on your SD and are patient then go for size.
I got a 8GB with 10class and my phone "fly".
kingmax - price 10€
Yeah, I suggest too to choose a class 10 if you are a gamer, a lower class if you're not.
But I don't suggest you to use a SD wich is less than class 4. Class 4 for in my opinion is the lower class to consider, others are too slow even for photos. Your device may suffer of this (be very slow)
Hi
How can we check class of any sd card if it is not printed on the card
I mean is there any software for this purpose
Regards
Rizwan
Nope
Class is the minimum speed guaranteed by an SD card for read and write.
A class 4 SD card can have speed of 4 MB/s or 14 MB/s but it wont have speed of 3MB/s
There is no way to check an SD card class since it's more of a standard rather than performance bench
@karandpr
Thanks for your reply
Sorry but could ot understand
A Class 4 Card have speed 4mb OR 14mb
There is difference between both speeds
Are you saying speed could vary between 4mb to 14 mb
And what will be the speed of Class 6 or Class 10
Riz
@rizwan65
A Class 4 card has speed >= 4MB/s
A Class 6 card has speed >= 6MB/s
A Class 10 card has speed >= 10MB/s
Speed of class 4 can be anything 4MB/s ,20MB/s ,30MB/s or anything.
But the manufacturer gurantees speed above 4MB/s.
Similarly with class 6 and 10 ,manufacturer gurantees speed of 6 & 10MB/s.
Lets say your Class 4 SD card's speed turned out to be 16MB/s.
Manufacturer could have labeled it as class 6 or 10. But he chose to label it as class 4 since thats what he gurantees.
Class X just means that you will get a speed of X MB/s at the very least.
It's a standard decided by the manufacturers not by bechmarking .
Just an FYI.
Unmarked cards are usually Class 2,
Thanks for this helpful answer
Regards
Rizwan