Database Users

Micro SD card?

I found this sandisk card that doesn't say a class but has a 10 mb/sec transfer rate. is this fast? http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3267933&CatId=3611
It seems like it's faster than class 6 according to specs...

if you look at the picture, it says that it's a class 2. It's right after where it says SanDisk. It's circled.

Sandisk does not make any cards higher than class 4 according to their website.
There are 8 Megabit (mb) to one MegaByte (MB).
Class speed a minimum data transferred in MB per sec.
There for your 10mb transfer rate equals a minimum class card.
A class 2 card would transfer 16mb per sec minimum.
Class 4 is 32 mb
Class 6 is 48mb
The website does say it offers 10MB of write speed, but um.. thats not possible.
They don't currently make class 10 micro sdcards.
I think their website is wrong.
Remember "For every big B you see, there are 8 smaller ones."
Basic version 1 MB = 8 Mb = 1000 KB = 8000 Kb (the complicated verion is base 8 math and it sux)
This is why when some one says they have a WiFi connection of 5000 Kbps we feel sorry for them.

WTF it double posted, my original post as a sec post?

great, thanks. have you guys tried A-Data cards? I've never heard of the brand, but they have a 4gb class 6 for like 15 bucks

look on newegg. they have a 8 gig transcend class 6 for 18 bucks and free shipping. Better deal and name IMO

http://www.newegg.com/Product/Product.aspx?Item=N82E16820171389
This is the fastest card available right now. Might be more expensive than the Transcend, but nothing beats a class 6 8G SanDisk at this time.

1. Well I guess the Sandisk website was wrong. That's a class 6 Sandisk.
hmmm According to another source Sandisk's Ultra 2 should be getting a minimum read speed of 15 MByte/s.
2. Nothing "Beats" the Sandisk? Based on speed I assume.
A 16gb would tech "beat" a 8gb
So what are you showing for a transfer rate? My Ridata 16gb class 6 is showing 4.65MB write/11.6MB read. I have no doubt that an ultra card would beat that, just curious as to by how much.

"Beat" implies a race. Race implies speed. Since I qualified that statement with "This is the fastest card available right now" you should easily see the correlation. Don't be pedantic.
My SanDisk 8G class 6 card gets about 19 to 20 MB/s read and 13 to 14 MB/s write.

Pedantic?
OK Sure why not.
"Beat" does not imply a "race" ....as a verb it more closely implies a violent, struggle or competition. Hence the confusion.
But that's ok. I knew what you meant. lol
Just asked a rhetorical qualitative question so we could understand your point of reference better.
Nothing personal. No harm intended.

Troll much?
Ooh, look an ignore button, I wonder what it does?
DELETED

t1n0m3n said:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820171389
This is the fastest card available right now. Might be more expensive than the Transcend, but nothing beats a class 6 8G SanDisk at this time.
Click to expand...
Click to collapse
Good to know, thanks. I have a Transcend one as well.. extremely fast.

[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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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]SD card calss - is it so important?

Ok, a bit noobish question, but i have to ask :
Is sd card class important for speed, performace, and everything when running android on hd2 ?
I have SanDisc 8 gb SDHC class 2 ( ) sd card atm.. it bugs sometimes ( slow wake up, etc... slow dls.. ) but i can live with it..
But ive heard that sd card class is playing major role in performance and stability and other stuff..
So im asking you, should i buy class 6 ( hard to find in Belgrade, Serbia) or class 4... Is it going to be better than this with class 2 ?
Thanks in advance ...
Sorry for bothering

I use a class 4 32gb card and it works fine. The 16gb card class 2 my HD2 came with also worked fine.

I honestly do not see any difference between using my Class 2 16gb, my class 4 8gb or my class 6 8gb...when it comes to wake up times and system speed...the differences are mearly milliseconds
Where I do see is difference is when adding media to the SDcard (music and movies)...Files that take 3-4 minutes to load on my class 6 can often times take 15 minutes or longer to load onto my class 2.
...my primary card I use is my class 2 16gb and it does not bother me one bit.

agentaaron said:
I honestly do not see any difference between using my Class 2 16gb, my class 4 8gb or my class 6 8gb...when it comes to wake up times and system speed...the differences are mearly milliseconds
Where I do see is difference is when adding media to the SDcard (music and movies)...Files that take 3-4 minutes to load on my class 6 can often times take 15 minutes or longer to load onto my class 2.
...my primary card I use is my class 2 16gb and it does not bother me one bit.
Click to expand...
Click to collapse
theres not much difference,the only difference ive noticed between my class 4 8gb and class 6 8gb is boot up times are a bit more faster with the class 6,thats about it really

I have 4GB sandisk class 2 and everything works fast and great. with MDJ_FroYo_HD_v._4.3_MDJ_S7.5HD.
Pozdrav iz rajvosa.

[Q] Testing the i5800 card speed

Could someone please try "SD Tools" and report you SD cards speeds. Im getting about 2.5 mb/s on both read and write. Tried several cards type 4 and 6. Cards reach full speeds when tested on a PC. Is that a limit for this phone or something is wrong with my unit? I had a Adata SD card die on me recently, too.. Could have been one of the fakes.
So, download and run "SD Tools" program on your i5800 and let me know the results. Also the type of sd card. I cant find any results on internet or this forum. I cant belive that i5800 is capped at 2.5 mb/s.
Thanks in advance everyone!

with the 1GB stock card, I got following result:
2.2 MB write speed
and
4.9 MB read speed.

8GB a-data
3,2 W
6,2 R

Hmm interesting. It seems something is wrong with my phone. I get 2.5 read on genuine 8GB class 4 sandisk card FAT32, at this moment. Thanks! Feel free to add the scores.

is it MB or mB, big difference!

stubborn_d0nkey said:
is it MB or mB, big difference!
Click to expand...
Click to collapse
MB/s
Hope "SD tools" can be trusted for Galaxy 3? Guess its time to RMA the phone.

-3.4 MB/s for writing
-4.7 for reading

Ok here is the concluson. I just got a new Class 6 Transcend card to make sure. Phone is OK. I got around 5.5 on both read and write. This is my third card so far.
No1: A-data 8gb Class 6 - died after 3 months of use, was always slow around 2.5 MB/s. I suspect it to be fake!
No2: Sandisk 8gb Class 4 - slow scores like its a Class 2 card. Also 2.5 MB/s. Tested it and its not one of the fake cards. Bought at a big reliable store. It seems Sandisk has some Class 2 cards marked as Class 4. WTF! Hope to return it.
No3: Transcend 8gb Class 6 - finally working as it should! Transfer speeds up to specs. Actually getting close to Class 10 scores with adapter under windows?!
I was either very unlucky or the SD card market is really crazy right now. Im just glad I dont have to return my phone. Thanks everyone for results!

Transcend 8gb Class 6- read=5mb/s
- write-4mb/s

Write = 3.7 MB/s
Read = 17.5 MB/s
Sent from my Lestatious v1.4.5.1 Galaxy 3 FROYO

Ya Mines also good But I dont understand wat CLASS

samsung 1 GB (i dont know class):
read: 2.5 MB/s
write: 2.4 MB/s
a-data 16 GB (class 10):
read: 4.9 MB/s
write: 4.4 MB/s

My cheap 2 GB Kingston:
Write: 3.7 MB/s
Read: 4.9 MB/s

Tweak to Speed up writing speed of sd card?

Hi,
I have class 4 SD card m running Pda's win7.8 rom. the problem I m facing is its lagging and slow then I did a benchmark test using free benchmark app everything is perfect except the write speed which is just 2.1 something, I know it may be a problem of SD card though wanted to know is there any tweak to speed it up through registry or app like andoirds have?
thankyou

no... buy better card...

dxdy said:
no... buy better card...
Click to expand...
Click to collapse
can you guide me which type of card should i buy?
thankyou..

someone write this list but also many others cards is fine
Kingston 4GB Class 4
Kingston 8GB Class 4
Kingston 32GB Class 4
Microcenter 16GB Class 2
SanDisk 8 GB Class 2
SanDisk 16 GB Class 2
SanDisk 16 GB Class 6
SanDisk 32 GB Class 2
i have SanDisk 32 GB Class 2 and speed is around 8 mb/s

Slower card makes
you wait longer,
gets your cpu hotter,
your battery drain faster,
lags the phone,
slow responses of your phone,
Go buy yourself a class10 SD card!
Believe me, if i knew the diffrence, i would buy it 3 years ago...

Thank-you dxdy and stealth21
will buy new SD and report back