Database Users

Why is a Class 6 SD (and a2sd) better?

I have a PNY Class 6 8GB MicroSD for my phone. I was wondering what are the benefits of a2sd, and what are the benefits of a class 6 SD rather than a lower number? I don't currently use a2sd, and wondering if i should.

lower number is slower. iirc, the Hero supports speeds up to class 6, which is faster then the phones ROM
Sent from my HERO200 using the XDA mobile application powered by Tapatalk

abcdfv said:
lower number is slower. iirc, the Hero supports speeds up to class 6, which is faster then the phones ROM
Sent from my HERO200 using the XDA mobile application powered by Tapatalk
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Ok, that makes sense, but why should I use a2sd? How is it better than storing them on internal memory?

if its a class 6 it will load faster.
Sent from my HERO200 using the XDA mobile application powered by Tapatalk

Ability to have more apps installed, as well as not having to wipe all the applications when you flash a new ROM (although some require you to wipe the ext partition, the ROM chef will tell you if you need to wipe the ext parition (where your apps are stored).
I didn't think I would ever need A2SD until I got to my limit.
I have not noticed a drop in performance opening apps with A2SD on my class 6 card, if there is, its milliseconds.

HeroMeng said:
Ok, that makes sense, but why should I use a2sd? How is it better than storing them on internal memory?
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A2SD moves all of your installed apps to the SD card. If you have a class 6 card, which have a faster read and write speed than the internal memory in the phone, it makes everything run a lot faster since it doesn't have to run everything from the phone.

sorry to get off topic a bit, but ive been looking for a good class 6 card. the only brand i have seen is a-data i believe for about 20 dollars. im not really looking for something that has a large capacity. in your opinion, which one is better as far as brand? and how much did you pay for your card?

One thing to remember though is that class 6 just means it is certified/guaranteed to transfer at 6MB/sec or faster. A class 2 card can still be as fast or faster than a class 6 and there are some out there that do just this.

jlem26 said:
One thing to remember though is that class 6 just means it is certified/guaranteed to transfer at 6MB/sec or faster. A class 2 card can still be as fast or faster than a class 6 and there are some out there that do just this.
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This is what I stopped in to say.
+1

kashb91 said:
sorry to get off topic a bit, but ive been looking for a good class 6 card. the only brand i have seen is a-data i believe for about 20 dollars. im not really looking for something that has a large capacity. in your opinion, which one is better as far as brand? and how much did you pay for your card?
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Click to collapse
I wouldn't... every A-Data sdcard I've ever bought has developed bad sectors almost immediately.
Sandisk is the standard, but a class 6 SanDisk is hard to find. The last few I bought were Transcend.

How do you tell what class your card is?

danieledwards1 said:
How do you tell what class your card is?
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It's on the card itself. It's the letter C with a number inside it. That number is the class number.

posguy99 said:
I wouldn't... every A-Data sdcard I've ever bought has developed bad sectors almost immediately.
Sandisk is the standard, but a class 6 SanDisk is hard to find. The last few I bought were Transcend.
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Click to collapse
thats what ive always been looking for, but as you said its hard to find. if you dont mind me asking how much did you pay for your card and what size is it? also, thanks for the heads up on the a-data card.

I read a review not long ago about sandisk class 2 cards. the tests they ran on them showed they were the equivalent to 10 mb/s. of course you would have to get the right batch number. does anyone know a site that tracks this kind of info?
Sent from my HERO200 using Tapatalk

I have a class 6 Transcend and use app2sd. Just wondering how much memory is it supposed to be freeing up?

gizmosears said:
I have a class 6 Transcend and use app2sd. Just wondering how much memory is it supposed to be freeing up?
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Depends on how you use a2sd.
If you move dalvik-cache to it as well as your apps it'll be a lot.
But the total amount depends on the number and size of the apps you have installed. I'm sitting with 126/160mb free on Internal Storage.

jlem26 said:
One thing to remember though is that class 6 just means it is certified/guaranteed to transfer at 6MB/sec or faster. A class 2 card can still be as fast or faster than a class 6 and there are some out there that do just this.
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Click to collapse
bobsbobbers said:
This is what I stopped in to say.
+1
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+2 I have a Class 2 card and I get around ~7+MB/sec, I'm tempted to bump it up to run A2SD more aggressively so that my phone's faster.

i was thinking about buying a class 4 16 gb Sd card.. will this help at all i am not running app2sd..so will the sd card make any difference??
Will it make my screen run smoother and fast on Damage Control 2.8??

xxxk15 said:
i was thinking about buying a class 4 16 gb Sd card.. will this help at all i am not running app2sd..so will the sd card make any difference??
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If you're not using a2sd it probably won't make much difference either way. If you're thinking of running a2sd later spend the extra 10.00 and get the class 6. regardless of the people talking about their high speed class 2 cards, you'd have to be fairly lucky to get those speeds (as someone else noted, depends on the batch of cards) with class 2, or 4.

an also if i run app2sd if i pull out my memory card at anytime will it mess up my phone??
and i have the 1st class right now so upgrading will make no difference when downloading apps to my phone or anything like that??

SD Card Question

I'm new to android phones, and have a very noobish question. I'm wanting to upgrade the SD card in my g2, and am not sure what I should get. I wanted to get a 32 gig card, but I can only find class 4 cards, if I drop to a 16 gig I can get class 6 or class 10 cards. Which one would be the best, I run psx4droid so I do have the games on the card. Other then that everything is ran from the phones internal memory I think, so would a class 4 card be fine or does it really need to be class 6 or better, also is class 10 worth the difference in costs?

I'm still using the stock sd. I don't run games though. Its up to your personal preference. If I was to upgrade i'd get top of the line. They do make a difference in classes but I don't think enough to the point where it will effect your psx gaming. My 2 cents is to go with what your comfortable with.
[G2/HTC Vision]

the classes refer to write speed so dont worry

I'm using a SanDisk 32GB Class 2 card with my Nexus One and it's working well. Speed tests have shown that it is performing slightly better than the Class 4 level.

Thank you everyone for the timely responses and information!

Were r u finding the 32 and how much?
As to the op I use stock card abd psx 1.7 without a problem runs smooth
Sent from my T-Mobile G2 using XDA App

xile6 said:
Were r u finding the 32 and how much?
As to the op I use stock card abd psx 1.7 without a problem runs smooth
Sent from my T-Mobile G2 using XDA App
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I'm not sure what the polices are on links here, but I found it at newegg for 119.99.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820139393

SynOfDreams said:
I'm not sure what the polices are on links here, but I found it at newegg for 119.99.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820139393
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Click to collapse
links are cool as long as your not trying to sell something or its illegal software.
but i would never pay that much for a card for a phone thats a 1tb usb hard drive for me
i was going to get a 32gb long time ago but ebay are full of fakes
but yea the stock card works great for psx games

[Q] best 32gb for dual boot?

hey guys im new to the hd2 threads and i want to dual boot windows phone 7 and android and i just want to know what kind of 32gb sd cards are the best because i want to partition it to where windows will have 16 and android the other 16 thanks in advance

I wanna bump this but re-phrase his question a little bit.
For anyone using a 32 GB SD card or have tried it for dual booting WP7 and Android - How is it performing? What brand would you recommend? Does class make a difference?
I searched and came to this thread. I have an idea but would like more input in this matter. I need more feedback to make the best decision possible because I plan on triple booting into Ubuntu but sorely lacking space right now. Thanks. And don't be shy to reply.

I'm guessing sandisk, but hold your horses.

Kailkti said:
I'm guessing sandisk, but hold your horses.
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Really? I hardly found Sandisk with class more than class 2....

There is a thread that shows the different speeds for sd cards. I found that class 2 Scandisk 8gb is the best preformer.

pglitt said:
There is a thread that shows the different speeds for sd cards. I found that class 2 Scandisk 8gb is the best preformer.
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Click to collapse
So have you given 32gb sd card a try? I'm not looking for speed and don't mind a lock up, hiccup, or even random reboot once in awhile. I just want something that works, minimally, at best. Now, if it works but there are constant problems and prevents me from doing certain things on my phone then forget it. I'll have to somehow make room for ubuntu or just plain do without it.

32GB SD which one best for defy?

Hey Folks!
Anyone is useing 32GB SD here with defy? and have experience too?
I wanna replace my current 16GB SD beacuse i need more space, only the gameloft folder more than 10GB...
So what the correct brand that works flawless with defy? So i need experience about from you.
Maybe put sd tools bench here, thx.

Icidu MicroSDHC 32GB, Class4 working fine here.

I have Kingston 32GB class 4...Works like a charm for over a month now...

Thx pals!
i forgot, pls write what OS ver., i use CM7 RC0.

somebody with class 10?

sirdamnedone said:
Hey Folks!
Anyone is useing 32GB SD here with defy? and have experience too?
I wanna replace my current 16GB SD beacuse i need more space, only the gameloft folder more than 10GB...
So what the correct brand that works flawless with defy? So i need experience about from you.
Maybe put sd tools bench here, thx.
Click to expand...
Click to collapse
same thread here..
forum.xda-developers.com/showthread.php?p=14825893

Hey guys, i have a question.
Defy with sd card 32GB don't have a slow running in the apps and system? I think when search data of app have a scann all SD and need some time, so have a slow run.
PS: Sorry for my Inglish! :$

SanDisk 32GB class 2
Works perfect.
Right now I am running Android 2.3.4

NoName 32GB class 2, 20€...works...

sirdamnedone said:
somebody with class 10?
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Click to collapse
I use Kinstom 32GB class10 early. But when I take photo, some photo maybe have error.
After that I check for internet about it. Someone said that maybe Kinstom's problem. It's not stable.
Now I use the Sandisk 32GB class4.
Maybe defy not support class10.
or that's Kinstom's problem. I don't know.

bkk99213 said:
I use Kinstom 32GB class10 early. But when I take photo, some photo maybe have error.
After that I check for internet about it. Someone said that maybe Kinstom's problem. It's not stable.
Now I use the Sandisk 32GB class4.
Maybe defy not support class10.
or that's Kinstom's problem. I don't know.
Click to expand...
Click to collapse
I bought a Team 16Gb Class 10 micro SD and it freeze my Defy, but I read that all Smartphone have trouble with class 10 cards (maemo and WP7 too).
It's something related to voltage (if you use setsvel to undervolt) and with partition (you need format the card with 32k or 64k)
I think Class 4-6 will be enough, until the Android Kernel will support class10.

diamond_lover said:
I bought a Team 16Gb Class 10 micro SD and it freeze my Defy, but I read that all Smartphone have trouble with class 10 cards (maemo and WP7 too).
It's something related to voltage (if you use setsvel to undervolt) and with partition (you need format the card with 32k or 64k)
I think Class 4-6 will be enough, until the Android Kernel will support class10.
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Click to collapse
I don't know my card's partition. Can I find it in my phone?

bkk99213 said:
I don't know my card's partition. Can I find it in my phone?
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Click to collapse
Did you mean SD Class?
Just look at the card, it has either a 2 or a 4 or a 6 in a circle stamped on it. Thats the class. The class = the number of MB/S it can transfer.

Ricardo_Is said:
Did you mean SD Class?
Just look at the card, it has either a 2 or a 4 or a 6 in a circle stamped on it. Thats the class. The class = the number of MB/S it can transfer.
Click to expand...
Click to collapse
No. Class=speed only. He said the partition have 32K 64K.....I think that is not Class. Because the class can't change when you format the sd card.

bkk99213 said:
I use Kinstom 32GB class10 early. But when I take photo, some photo maybe have error.
After that I check for internet about it. Someone said that maybe Kinstom's problem. It's not stable.
Now I use the Sandisk 32GB class4.
Maybe defy not support class10.
or that's Kinstom's problem. I don't know.
Click to expand...
Click to collapse
thx 4 the info 4 all!
Now, my mainly target is sandisk 32GB class 4

dont buy class 10 for deft,
always error
Sent from my MB525 using XDA Premium App

Using a class 4 32 GB Kingston since a few days, working nicely. Got 5.5 MB/s write, 12 MB/s read. Thanks for the info, I was going to buy a more expensive (and I though, more future proof and safer) class 10 one, before I read about the compatibility problems with class 10 here.

using class 6 non brand. Works perfectly with 2.3.4 CM7

bkk99213 said:
I don't know my card's partition. Can I find it in my phone?
Click to expand...
Click to collapse
If you want to find out what partition your card is just plug it into your computer then mount as SD storage. Right click on the card from "computer" and select format. The default settings your card is set at will be shown. You can change it to other sizes, and formats (like FAT, NTFS, but FAT32 should be default and used for phones). I recently formatted my Samsung 8GB class 6 at 4069, and no issues so far. Don't worry it won't format unless you select to format, so you can do this just to check.

Hi there, because of this thread i bought a class 6 16GB Trancend SD card. Formatted it with 64kb clusters now have 11,2 Write and 21,9 Read speed (in SD tools).
Thx you all for the advice not to buy a class 10!
Running GB 2.3.4 nandroid.

[Q] Class10 Sd Card with Android

Hi all.
I know there are number of posts in forum about sd card speeds and preferences. But everyone says different from the other about exact performance. Both sd and nand android versions need a fast sd card to work smoother. That makes me want to change my 8gb Class2 sdhc with 8gb Class10 sdhc one --> http://www.e-piix.com/memory-cards/team-micro-sdhc-class-10-8gb.html
Write speed with class2 card is 3,5-4 mb/s and read is about 14,5-15 (Tested using sd tools, on hyperdroid cm7 nand rom). Will a class10 sdhc improve my smoothness or make me experience a faster android? Anyone has experience with a class10 card? Or any ideas?

redoano said:
Hi all.
I know there are number of posts in forum about sd card speeds and preferences. But everyone says different from the other about exact performance. Both sd and nand android versions need a fast sd card to work smoother. That makes me want to change my 8gb Class2 sdhc with 8gb Class10 sdhc one --> http://www.e-piix.com/memory-cards/team-micro-sdhc-class-10-8gb.html
Write speed with class2 card is 3,5-4 mb/s and read is about 14,5-15 (Tested using sd tools, on hyperdroid cm7 nand rom). Will a class10 sdhc improve my smoothness or make me experience a faster android? Anyone has experience with a class10 card? Or any ideas?
Click to expand...
Click to collapse
i think brand is more important than class. for me class2 sandisk has smoother than class4 toshiba. i strongly recommend sandisk. and i think class4 is fairly enough.

mutil said:
i think brand is more important than class. for me class2 sandisk has smoother than class4 toshiba. i strongly recommend sandisk. and i think class4 is fairly enough.
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Click to collapse
Agreed, stick with Sandisk. My Kingston 16GB class 4 is cheaper than a Sandisk but apparently is not read by MAGLDR for SD Android, so I can't boot more than NAND Android. I think that all Sandisk cards are supported.

mutil said:
i think brand is more important than class. for me class2 sandisk has smoother than class4 toshiba. i strongly recommend sandisk. and i think class4 is fairly enough.
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Click to collapse
Ok, thanks. If you have a sandisk, could you add a test result then?
Nigeldg said:
Agreed, stick with Sandisk. My Kingston 16GB class 4 is cheaper than a Sandisk but apparently is not read by MAGLDR for SD Android, so I can't boot more than NAND Android. I think that all Sandisk cards are supported.
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OMG Is it an original kingston? I have a 8 gb sdhc class2 card and it doesnot even have a brand But works well with magldr So, thank u

redoano said:
Ok, thanks. If you have a sandisk, could you add a test result then?
OMG Is it an original kingston? I have a 8 gb sdhc class2 card and it doesnot even have a brand But works well with magldr So, thank u
Click to expand...
Click to collapse
there was a thread about that in xda moths ago.can you please google it. and test results may be faulty. because standart read write speeds has nothing to do with android. if you can find that thread you'll see many interesting results with different brands.

redoano said:
Ok, thanks. If you have a sandisk, could you add a test result then?
OMG Is it an original kingston?
Click to expand...
Click to collapse
I don't understand what's so surprising? Are Kingstons not common in your area?
And yeah, there was a really good thread a while ago which showed that in some ways the class 2 cards outperformed the class 10 cards by miles, whilst in others they were thrashed. Also showed good details about brand.

Yepp sandisk 16gb best one!!!