Database Users

How do I know what class SD card I have?

I have the 4 GB SD card that came with my Mytouch and it says SDHC 4GB on it. how do know what speed class it is?

its a class 2. theres a little circle that has the class in it

class 6 will have a 6 in a circle on it.

[Q] What memory cards are you using to run android from?

Hi Guys, I'm currently testing the MattC 1.5 build from a generic 4gb microSD card i had lying around and it works pretty well, but i was thinking of buying an 8gb Sandisk Mobile Ultra card to replace it. I would link to the car but i'm not allowed A quick search on google/ebay should bring up the card i want.
Do you think I would notice an improvement in speed with android running from the card?

kingston 8gb sdhc card Chinese bootleg

If your current card is a class 2 and the 8 gb is a class 4 or higher than yes, tou would notice a difference.
Sent from my HTC HD2 running DarkStone HD2Froyo v1

I use Sandisk 16gb sdhc and no problems with running android-of course only proper wm rom.... Not sure which class is the card

my current card is a Class 2 4gb Sandisk, for £17 i might just get the new card and see how it goes. Would you expect an increase in the score on the Quadrant benchmarks?

Sandisk mobile ultra sdhc 4 gb class 6

are these cards definitely class 6 as i have seen various sites saying they are only class 2 but much faster than the class 2 minimums?

I use a Sandisk ultra sdhc 8gb class 6......working great

16gb stock card that came with my tmous hd2, so im guessing its a class2 but everything runs smoothly tho.
Sent from my HTC HD2 using XDA App

8gb A-DATA class 6

Kingstone 4GB SDHC Class 4, working perfectly, but I'm looking for a class 6 card to see the difference in speed

See my signature, working perfectly without lags , I have never seen a SOD.
Sent from my HTC HD2 using XDA App

Hi,
Well, I use since last week a SanDisk 32 microSDhc class 2. Pretty fast in data transfer.
Read somewhere that the class 2 of this 32 GB edition can be compared to class 6 of older micro SD cards.
Had the standard 2gb microSD before, which was sold with the HD2.
Have no issues of speed with SanDisk 32 microSDhc class 2, when it comes to running Android and transfer data.
Recommend it!

generic 16gb class 2

Adata 8g class 6 lighting fast cost $15 running mattc froyo 1.5 fullram

Apacer 16GB SDhc class 4
Working perfectly..

Download SD Card Speed Tester from Market
and test your real speed. Run it three times on each card.
I have Class 2's that are 2's. I have the original 16 gb Class 2 that rates at six and a class 4 Sandisk that rates at a 9. You never know till you test it. Also have a Class 6 that rates at a 9.

8 gig kingstone class 4.
i got a 4 gig class 6 micro sdhc, but i can't notice a difference in speed big enough to compensate the loss of 4 gigs (lots of songs stored).

johnboatcat said:
and test your real speed. Run it three times on each card.
I have Class 2's that are 2's. I have the original 16 gb Class 2 that rates at six and a class 4 Sandisk that rates at a 9. You never know till you test it. Also have a Class 6 that rates at a 9.
Click to expand...
Click to collapse
i have an 8gb class 2 however the test says i have class 4 read/write speeds so im pretty happy

Just got 1544 in quadrant using class 2 sandisk 8gig

[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.
Click to expand...
Click to collapse
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/

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

Which microSD card choose?

Hi,
I want to buy a new card for my HD2 and for better works ROM in DATAonEXT. So i have dilemma xD
- Sandisk micro SD Ultra Class 10 8GB
- Samsung microSD Class10 Pro 8GB

morfeusz747 said:
Hi,
I want to buy a new card for my HD2 and for better works ROM in DATAonEXT. So i have dilemma xD
- Sandisk micro SD Ultra Class 10 8GB
- Samsung microSD Class10 Pro 8GB
Click to expand...
Click to collapse
Sandisk micro SD card are great in my view, because i have been using it from long time and i never had problem in performance with these SD cards.

SDcard for store system
morfeusz747 said:
Hi,
I want to buy a new card for my HD2 and for better works ROM in DATAonEXT. So i have dilemma xD
- Sandisk micro SD Ultra Class 10 8GB
- Samsung microSD Class10 Pro 8GB
Click to expand...
Click to collapse
Sandisk doing better than Samsung in SD, for higher performance, i use Sandisk UHS-I 8GB SD.

I used both NativeSD and DataonExt. My Scandisk Ultra 16G work fine.

Sandisk 10 class with UHS - hd2 incompatible
I tested 2 microsd cards(I bought in one place at once) with 2 different hd2.
first card worked with bouh hd2, but only 1-2 days => after freeze.
second card freezed at boot always, on both phones.
MD5 checksum was identical for both cards.
Both cards work very quickly with other devices without glitches.
Now i use 4.2.2 with transcend 10 class without UHS. HD2 is fast now, more than ever... A1 SD Bench: 18.9mb/s read, 10.5mb/s write.

sobersu said:
Sandisk 10 class with UHS - hd2 incompatible
I tested 2 microsd cards(I bought in one place at once) with 2 different hd2.
first card worked with bouh hd2, but only 1-2 days => after freeze.
second card freezed at boot always, on both phones.
MD5 checksum was identical for both cards.
Both cards work very quickly with other devices without glitches.
Now i use 4.2.2 with transcend 10 class without UHS. HD2 is fast now, more than ever... A1 SD Bench: 18.9mb/s read, 10.5mb/s write.
Click to expand...
Click to collapse
I would strongly suggest checking out this thread.http://forum.xda-developers.com/showthread.php?t=1947560
My SanDisk 32gb class 6 card reads about 10mbs higher than yours. My suspicion is that it's your buffer size that needs to be adjusted, but that thread is one of the best resources for optimizing you're card.
Sent from my NexusHD2 using xda premium

morfeusz747 said:
Hi,
I want to buy a new card for my HD2 and for better works ROM in DATAonEXT. So i have dilemma xD
- Sandisk micro SD Ultra Class 10 8GB
- Samsung microSD Class10 Pro 8GB
Click to expand...
Click to collapse
Sandisk Ultra as i am using one right now and damn its fast....

Realalist said:
I would strongly suggest checking out this thread.http://forum.xda-developers.com/showthread.php?t=1947560
My SanDisk 32gb class 6 card reads about 10mbs higher than yours. My suspicion is that it's your buffer size that needs to be adjusted, but that thread is one of the best resources for optimizing you're card.
Click to expand...
Click to collapse
Do you test speed by "SD Tools" ? In this programm my transcend show 33mb/s, but it's cached speed, i saw same speed on 2 class card.
I agree what sandisk very fast. But cards with UHS not worked with my both hd2(512mb EU and RU versions )

SDTools seems to be the XDA standard from most when testing you're SD card. I find it very accurate and reliable.
Sent from my NexusHD2 using xda premium