Database Users

[Q] Micro Sd class 10 or class 6?

I'm looking to buy a new MicroSD and wondering if getting a class 10 over a class 6 would make a significant difference to the phone (if im using data2sd and or apps2sd)
Thank you!

I think the difference between class 6 and 10 would feel minor, where-as the difference between the class 2 and class 6 feels huge.
And since this is the Vibrant forums, I should mention that the internal memory in the phone is very fast. I tested it at over 10MB/s write on my first phone. My second phone its closer to 6 MB/s write. So you apps and stuff should run perfectly fine from the internal app storage.
I should also mention that I purchased the new kingston micro sd thats rated class 4 but claims speeds upto class 10. Upon testing that I got 9 MB/s write. ($28 after $10 reward from buy.com). My previous class 2 16GB card tested it 2.6 MB/s write for comparison.

Shane_pcs said:
I think the difference between class 6 and 10 would feel minor, where-as the difference between the class 2 and class 6 feels huge.
And since this is the Vibrant forums, I should mention that the internal memory in the phone is very fast. I tested it at over 10MB/s write on my first phone. My second phone its closer to 6 MB/s write. So you apps and stuff should run perfectly fine from the internal app storage.
I should also mention that I purchased the new kingston micro sd thats rated class 4 but claims speeds upto class 10. Upon testing that I got 9 MB/s write. ($28 after $10 reward from buy.com). My previous class 2 16GB card tested it 2.6 MB/s write for comparison.
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Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.

designerfx said:
Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.
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I understand that, thats why i picked those classes. But my point is that a class 6 card is 3x the speed of a class2 where class 10 isnt even twice as fast as the class 6. So the perceived difference is smaller, even though the technical difference is the same.

I'm still running a class 2 and I've been wondering if this is holding me back on this phone (card was previously in my G1).
Will the lower classes function the same (creating ext2 etc...) it's just a matter of speed? Just wondering if there's anything that simply can't be done with a class2 or even 6 that could be done with a 10.

CapitalM3 said:
I'm still running a class 2 and I've been wondering if this is holding me back on this phone (card was previously in my G1).
Will the lower classes function the same (creating ext2 etc...) it's just a matter of speed? Just wondering if there's anything that simply can't be done with a class2 or even 6 that could be done with a 10.
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Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.

Vegastouch said:
Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.
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xD What class was the stock sd card?

I only ever see class 6+ cards being used in higher end compact cameras and SLRs.
Putting anything higher than class 6 in a phone your using for apps/music/movies isn't needed and just a waste of money.
I've also seen a lot of people saying the memory card speeds with the galaxy s are bottlenecked right now, so your not even going to get top speeds with a class 6.

Vegastouch said:
Just cost you more. Do you really need a class 10 for this phone? Avatar is on a card that isnt even a class 2.
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While the card isn't marked, it tests out at just over 4MB/s which would put it in a class 4.
And we should be clear that the class refers to the write speed. A class 2 will read at 10 MB/s just like the other classes. Where you run into issues with class 2 cards is when you start modding or running programs from the sd card. If you use the card for a swap partition or something the write speed now plays a major factor in the usefulness.
If all you want it for is to place your music files on there and listen to them, then a class 2 will be plenty. That was my initial thought when I bought my 1st 16 GB card for my mytouch3g. Then I got into custom roms and found myself limited.

How do you test the speed of the SD card?

What size microsd card are you looking for? If its a 32GB, I have only seen a Sandisk microsd in Class 2. As far as I know there are no higher classes at this time. Hopefully that will change soon. I would like to get all of my music onto one 32gb card.

designerfx said:
Just to help out here...
the difference between class 2 and class 6 is the exact same as class 6 and class 10. Remember the cd-rom speeds (52x, etc)? That's how the speed is calculated for a SDHC card. So a class 2 = 2x cdrom, class 6 = 6x, class 10 = 10x.
whether our hardware has capability to handle what a class 10 can do, that I don't know. I'd definitely advise to get something with more space than a 2GB card though - I'm not sure everyone needs a 32 (personal opinion/long discussion), but I absolutely agree it should be improved upon.
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This isnt exactly true. with cdroms the X stands for how much faster it would spin in relation to a audio cd. So 1x ment it spun at the same speed as a audio cd. 2x was twice, ext ext. And this was a max speed.
Classes for SDCard stands for the minimum transfer speed. class two is at least 2mbps, class 6 is 6mbps, and so on.

frankencat said:
How do you test the speed of the SD card?
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google FDbench
it will test the read and write speed as well as operations per second.

I still can't find a 32gb microsd class 10, anyone find one for sale?

Class 10
Class 10 limitation presently is 8 gig for all brands except the Kingston and soon to be released Silicon Power. The Kingston brand never benches as advertised, so they are not reliable from my point of view. Silicon power has been pretty solid on their claims from my testing versus their claims, but I have not yet got my hands on the latest class 10 16 gig, I have been trying to buy for the since 10-1-2010 but not out in USA yet.
Kingston (in my opinion) is rife with false claims and I find their products have always been sub par.
Flashing and alike works better with class 6 over class 2 & 4. So, if you really want more memory the only 32 gig class 6 I have seen advertised (amazon) are: Transcend, Centon, and Komputerbay (what a name?!) 32 gig Class 6
Other than that, we wil just have to wait until they get the algorithm figured out for a micro ad card with that much ram and that fast.

Get the app "sd card speed test" it works ok Im sure there are others as well

I imagine the only reason you would need a Class 6 card or above is if you plan to take a lot of HD video. Apart from that, even a Class 2 is fast enough to keep up with the still camera, not to mention anything that just requires reads, like music or movie playback.
As for running apps off an external SD card, why would you ever want to do that? You can load close to 2GB on the internal app space, which is likely way faster than any mounted external SD card. I feel like an app whore and I'm not even close to using half that space. By the time apps start getting large enough that it's an issue, we'll be on the Vibrant 2 or beyond.

glad that you asked
merrifield69 said:
I'm looking to buy a new MicroSD and wondering if getting a class 10 over a class 6 would make a significant difference to the phone (if im using data2sd and or apps2sd)
Thank you!
Click to expand...
Click to collapse
because I just picked up a 16G class 10 by WinTec last week and it is VERY fast from boot up with 9G occupied from 15G available (wondered 1G gone to? and that is a lot of gone G lol). It was $42 wo tax expensive but so far the fastest.

Whoohoo
mine 16G class 10 tested 2x >8M and 1x >9M write, 3x > 18M read and it was probably so fast that the result said "unknown class" lol. x means 1 run with 2MB buffer setting. Downloaded app call SD card speed tester.

There are now some 32GB class 6 SDCARDS on the markey, and with 2.2 and installing apps to SD that might matter. It might also matter if you have a TON of music and images, as "Scanning SD for Media" would be faster.
You will pay money for the time savings though.

[Q] Most Reliable SD Card to Run Android

Might sound like a strange question, but what would you suggest getting for most stable Android run. I've had a SAN DISK 16GB but it would always get corrupt and formatting (tried using SD Formatter/windows tools/phone) would only fix the problem for short time.
So which of the following in your opinion is the most reliable choice:
1. SAN DISK
2. PATRIOT
3. Kingston
4. ADATA
5. Transcend
6. Lexar
7. SONY
Also, what class (2,4,6 would be nice if someone could explain whats best and generally what it means). As well as capacity (whether it affects reliability)

No one buy the kingston class 4 4gb card, does not work well at all! I trashed it lol

i got a Class 10 Patriot card, works well, really well

Transcends 8gb Class 6!
Never had a problem with it

Hi, I am using transcend 8Gb card. I dont find any problem till now.

RiData 16GB Class 6
Been using it for 2 weeks. No issues.
Write & Read transfers are averaging 9mbs when transfering backups to and from.

Kingmax 8Gb Class 6, not bad

Don't buy transcend 8gb class 6 card in any situation, it has really bad power drainage problem in every build, after I swapped it with my friends verbatim class 4 8gb I have top 1 % per hour drain in standby, believe me.

Stock 16 gb san disk I got when I purchased my hd2, runs amazingly
Sent from my HTC Desire using XDA App

Got 3 sandisks 2 4 8gb..all work well

I use stock card
Sent from my HTC HD2 using XDA App

Any way to check faulty micro sd?
Thanks everyone for the input, seems like I've either got a faulty SanDisk card or doing something wrong here. Are there any tools to test whether or not my 16Gb SanDisk micro sd is faulty or possibly corrupt... By the way, I got it off ebay for $20... seems fishy, although it came in original packagin brand new.

...
German TakeMS 4GB Class6, works like a charm...

Transcend 16gb class 6 runs Android with no hiccups at all and the transfer rate is blazing fast

Samsung 4Go Class 4, low battery drainage, performs like a class 6 card. Original style (grey coloured).

Battery consumption
Battery consumption on Transcend sucks if you want long battery life use sandisk or best by my tests 8gb class 4 Kingston.

i have 4 different sd cards kingston 4 gig class 2, 2 sandisk 4 gig , and a class 6 transcend 8 gig...and i always get better results with the stock card

deli_gt said:
Don't buy transcend 8gb class 6 card in any situation, it has really bad power drainage problem in every build, after I swapped it with my friends verbatim class 4 8gb I have top 1 % per hour drain in standby, believe me.
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Sd card don't have jack sh*$ to do with battery drain. As far as cards go, it don't matter. Just pick one. There all the same regardless if someone says this one is faster because it's a class 6, or 8. I have a class 2,4, and 8. No difference what so ever. Even though its written on the class 8 at a higher speed.

Any idea on why sometimes I find non-removable random symbol files on my SD? Does this indicate corruption?

German TakeMS 8gb class 6 extreme fast and stable.
beware buying microsd on ebay
chk this site before buying http://sosfakeflash.wordpress.com/

[Q]Does class 6 SD card improve freezing

So I've done the regedit deletion for the gsensor.dll but still encountering random freezes. They last about a minute and aren't breaking where I have to reboot but still annoying. Using a froyosense build.
I am using my stock class 2 SD card. I remember reading a few threads that the class 2 would cause freezing on games, even the game demos that came with the hd2.
Will moving to class 6 help the freezing? Any thoughts?
edit: Solved my own issue. Using G sensor lite or changing the g sensor in kernel to off will stop freezing. Class 2 card runs perfectly. Probably a class 6 would improve video/music but thats true of winmo also. Maybe if someone finds my post with the same question this will help.

no i bought a class 6 8 gig , and the only difference i really se is booting android faster and maybe a little better game play

Using a class 6 sandisk and stock class 2 card and I can def say there is a big improvement in stability and performance with my class 6 card. But it is only a 4 gig card.:-(

I am trying to use the 16 gig that came with the phone. It has major issues. The 1 gig card I have works well enough, but with some builds, it's not even enough space! This sucks. How can I even tell what class of card I have? I may buy a 2 gig card because I don't load music and stuff.
EDIT: I figured it out. I see this 16g card has the "2" on it for class 2. Lame.

SD Card Class Survey

For those of you who have upgraded your SD cards: what class of SD card do you have? Is it worth the extra money to get anything other than a Class 2 card?

I stuck with the class 2. I read the more expensive class is more suitable for capturing hd video. I don't do alot of that, I got my 16gb class 2 to store movies.
Samsung Vibrant using Bionix 1.9.1 w/JACs UV/0C v1.1

I have a 16gb card labeled as a class 4 (and priced as such), but it performs like a class 6.
I got it because I was expecting to use Apps2SD at some point in the future and it makes a HUGE difference there.

The stock card is a class 4. I had an 8 GB class 6 from my G1 days that I opted to use instead. Class speed matters, but you need to debate how much read/write are you doing with your SD card. Thankfully the Vibrant has a lot of internal memory too.

The higher the class the more rapid the data transfer. But a reputable, like Sandisk class 4 will outperform a "Joe's SD Co." Class 6 in my experience. I was running a2sd on my G1 with the stock class 2 and I had time to make a sandwich while waiting for apps to open, better result with a class6. Also when transferring large amounts of data between PC and device it will significantly cut down the time.
Sent from my SGH-T959 using XDA App

Class 6 16 gig
have a class 6 16 gig I use alot for data storage fro my work. I have found the Kingston class 10 is slower than this one, read/write speed DO matter if you use it alot, and I do. Silicon power is releasing a class 10 16 gig when I get one Ill report back it benches and see if it meets the stated benches it is claiming

[Q] Does it really matter what class a microSD card is?

I was planning to upgrade my MicroSD card on my phone and i found this class 4 32Gb card from A-Link and a little bit more expensive 32gb class 10 one. Does it really matter much on these mobile phones?

For me it doesn't. I'm moving mp3 files from laptop to x5 and I have no problem if I wait 1minute longer to copy those files.

Might effect video recording when saving directly to sd card.

I am using the class 4 32Gb card ,it's good .

I've used a class 4 for a while now its fine on my phone atleast..... just takes a few minutes longer to load music on it sometimes

The class of an SC card gives its guaranteed minimum write speed. A class 4 card has to be able to write at 4 MB/s, a class 10 card at 10 MB/s. That also includes the possibility of class 4 cards being faster than class 10 ones. I've seen that happen a lot. For example I use a class 6 card that I've benchmarked at over 18 MB/s sequential write.

It is all about your pocket... personally i believe that any class above 4 is fine . IF you move many files from your pc to mobile it is better to buy class 10 because 6mb/s more is significantly better.