Database Develop

[Q] Does 32 GB class 10 Memory Cards Compatible with the HD7

Hello Every Body,
Can any body please confirm if the class 10 32 gb memory cards such as Kingston or A-Data are compatible with HTC HD7.
I read here before in XDA that only the class 2 cards from Scandisk are only the one that are compatible with the windows phone 7 devises.
But in this thread http://forum.xda-developers.com/showthread.php?p=10354934
dorianmuthig says that class 4 cards are compatible also.
So my Questions are:
1- Are Kingston or A-Data or other brands are compatible with the HD7 (because I already have 32 gb class 10 A-Data memory card)?
2- Are class 4 or above classes are compatible also?
Thanks in advance and I appreciate if any body can clear these inquiries for all to be benefited.

There is no such thing as a class 10. and as i have read at multiple places only class 2 sandisk cards have been confirmed working. everything else doesnt work this means class4 etc...

nuclear said:
There is no such thing as a class 10. and as i have read at multiple places only class 2 sandisk cards have been confirmed working. everything else doesnt work this means class4 etc...
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Thanks nuclear for replay,
for your information there is a class 10 32 gb memory card
I hope that some body who tries higher classes than class 2 tells us his experiment

Apparently there is class 10 (16 and 32gb) cards available. http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=class+10+32+gb+microsd But, from what has been discussed class 2 are the only ones that have been confirmed to work properly (not decreasing boot times and app launching times). So, I would be cautioned to buy one until there is more definitive information as they have to be pretty expensive.

kwill said:
Apparently there is class 10 (16 and 32gb) cards available. http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=class+10+32+gb+microsd But, from what has been discussed class 2 and 4 are the only ones that have been confirmed to work properly (not decreasing boot times and app launching times). So, I would be cautioned to buy one until there is more definitive information as they have to be pretty expensive.
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Where did you read about the class 4 card?

nuclear said:
Where did you read about the class 4 card?
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Oops, my bad. Mis-stated that one. Class 2 is all that's confirmed. For some reason i was thinking the tutorial to change it to 32 gb was using a class 4. Slap me

It seems that we should wait for some time to be sure
And if any body try other classes higher than class 2, please inform us withj the results

It may work, however since Kingston and A-Data use Sandisk or Samsung manufactured cards with a secure digital storage controller optimized for fast sequential read and write, small file access may actually be slower than in a comparable Class 2 card. Those fast cards are made for video recording and high resolution photography which isn't what Windows Phone 7 OS needs. You need to look at 4K random read, 512K random read/write and sequential write.
Get either a Sandisk SDSDQM-032G-B35 (definitely works) or SDSDQM-032G-J35A (current manufacturing cycle, promises faster speeds and lower power consumption, still rare)

kingston class 4 = does NOT work.
sandisk class 2 = works (same speeds as the kingston though!)
thats as far as i tested.

pencilcase said:
kingston class 4 = does NOT work.
sandisk class 2 = works (same speeds as the kingston though!)
thats as far as i tested.
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Click to collapse
Thanks for the advice,
But what about scandisk class 4 or higher are they workable

ihabsad said:
Thanks for the advice,
But what about scandisk class 4 or higher are they workable
Click to expand...
Click to collapse
SanDisk class 4 has just been released and is available on Amazon for $100. I am getting a class 2 which is tested and confirmed working. The class 4 if it works should be much faster.

Sandisk SDSDQM-032G-B35 was not working properly on my HD7. Slow, freezing, crashing, and sometimes not detected card. All kinds of bad behavior. The original 16 GB card was sent back into the phone, now every thing works OK.

[Q] About SD Card

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?
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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

Nook Color microSDHC speed class question

I very recently got a NC, and I've tried running both Froyo and Gingerbread from the microSDHC card. I'm using a Class 4 card, and I noticed that both seemed to lag quite a bit. Do you guys think I'd see a difference if I used a Class 6 or Class 10 card? Thanks!
--Adam

I think the most important question, is what brand are you using? The class ratings might mean something if they were enforced, but the sad fact is that they are not, which leads to lots of cheap, crappy cards out there.
I have a Kingston class 4 that barely makes class 2 speeds, and an 8GB Sandisk class 2 that falls between class 6 and 10 (in real world speed). If you get a GOOD card, running Froyo/GB from it will be smooth as butter (Running the posted custom Froyo on my Sandisk, and it is as fast as the stock ROM on the eMMC).

I believe the class number corresponds to the cards base transfer rate. For example class 4 is 4 mb/s, where class 10 is 10mb/s. Depending on the brand and how much you spend, class 10s can go even faster than 10mb/s. This is a significant difference, but I don't know how much it will actually affect the real performance of NF and HC on SD.
I just ordered a class 10 to see this for myself because I originally tried it on a class 4 card as well, and wasn't happy with it. I will post again when I try it.
Sent from my SCH-I500 using XDA App

I don't have the device with me (at work), but I think it's a Kingston, and I know it's Class 4
Divine_Madcat, would you recommend the Sandisk?

Is there a utility that people are using to TEST the speed of their micorSD cards, or are you just monitoring the transfer rate when moving files?

ovar said:
Is there a utility that people are using to TEST the speed of their micorSD cards, or are you just monitoring the transfer rate when moving files?
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Good question, I'd be interested in knowing this also.

niphoet said:
I don't have the device with me (at work), but I think it's a Kingston, and I know it's Class 4
Divine_Madcat, would you recommend the Sandisk?
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Very much so, yes. I am very displeased with my Kingston, after seeing how much better the Sandisk is. You will also be able to find lots of other happy Sandisk users here (And unhappy owners of other brands)..
ovar said:
Is there a utility that people are using to TEST the speed of their micorSD cards, or are you just monitoring the transfer rate when moving files?
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Click to collapse
niphoet said:
Good question, I'd be interested in knowing this also.
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Click to collapse
There are plenty of free drive benchmarks out there, but my real world tests are good enough for me. When i use either dd (linux) or the windows image burner for creating/backing up my Froyo images, i get a very solid indication of my transfers.

Divine_Madcat said:
There are plenty of free drive benchmarks out there, but my real world tests are good enough for me. When i use either dd (linux) or the windows image burner for creating/backing up my Froyo images, i get a very solid indication of my transfers.
Click to expand...
Click to collapse
Great thanks for the TIP.
Also, it may be beneficial for folks to post MicroSD cards they have had good performance with. Maybe get a core collection of solid SD cards for the Nook.

Divine_Madcat said:
Very much so, yes. I am very displeased with my Kingston, after seeing how much better the Sandisk is. You will also be able to find lots of other happy Sandisk users here (And unhappy owners of other brands)..
There are plenty of free drive benchmarks out there, but my real world tests are good enough for me. When i use either dd (linux) or the windows image burner for creating/backing up my Froyo images, i get a very solid indication of my transfers.
Click to expand...
Click to collapse
That's how I've tested mine but awkwardly have two 4gb sandisk sdhc class 4 an one gets 9-10mbs other gets 3-6mbs.
In market there is a benchmark for sd thats free (can't think of the name) but I believe the nook only manages 3-6mbs r/w no matter the SD.
sent From a NC on eMMC Froyo

ovar said:
Great thanks for the TIP.
Also, it may be beneficial for folks to post MicroSD cards they have had good performance with. Maybe get a core collection of solid SD cards for the Nook.
Click to expand...
Click to collapse
I've had great luck with the Kingmax Class-10 from buy.com so I bought 4 more 4 GB ones to keep test images to run from on...
http://www.buy.com/retail/usersearchresults.asp?querytype=home&qu=kingmax+sd&qxt=home&display=col
Was getting 14+MB/s write speeds, 20MB/s read when copying card to card using usb adapters... and got 2000+ quadrant scores running both 2.2 and 3.0 images from the sdcard w/1.1GHz kernel...

camwinnn said:
but I believe the nook only manages 3-6mbs r/w no matter the SD.
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Really? That sucks.

niphoet said:
Really? That sucks.
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I believe so, the benchmark (J disk) isn't free anymore but just try dragging over some movies or something big from the PC to the SD via nook, could just be mine but I saw others in irc talking about it.
sent From a NC on eMMC Froyo

the card i am using is a patriot 8gb class 4 i got from newegg. when i boot froyo, its extremely slow, and unresponsive. i do not reccomend. unfortunatly its the only sd card i have that actually booted the os.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220523

john10101 said:
the card i am using is a patriot 8gb class 4 i got from newegg.
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Among the many cards I've tried I had the 16GB version of that (class 4) card. The Sandisk 16GB (class 4) I got bested the Patriot and oddly some others that were supposed to be Class 10. It was the only way I got Froyo and especially HoneyComb to run reasonably.

I just downloaded the app System Benchmark on my Evo and tested the Class 4 Sandisk in there:
Write: 7.1 MB/s
Read: 10.6 MB/s
Not too shabby at all, I think when I get home this baby is going in the NC.

niphoet said:
I just downloaded the app System Benchmark on my Evo and tested the Class 4 Sandisk in there:
Write: 7.1 MB/s
Read: 10.6 MB/s
Not too shabby at all, I think when I get home this baby is going in the NC.
Click to expand...
Click to collapse
It should run it amazingly. My SD gets 7.4 write, and 12.x read, and Froyo on it runs as smooth as elcair does. It has really become my daily driver.

On my Kingston class 6 I get 9mb/s write, on my Sandisk class 4 I get 3mb/s

I just installed System Benchmark from AnTutu also to have a dollars to dollars comparison and on my KingMax 4GB Class-10 in the NC running HC I get 9.9MB/s write and 18.5MB/s read... running the complete test takes forever though it seems...

MXIIA said:
On my Kingston class 6 I get 9mb/s write, on my Sandisk class 4 I get 3mb/s
Click to expand...
Click to collapse
Well, at least that's the expected outcome considering the Kingston class is higher. The sandisk class 4 card I have gives me ~ 5-6 Mb. If it's true that the NC can't benefit from more than 6 Mb then I won't ever need anything better.

I found with both my Kingston 4GB class 4 microSD and Kingmax 8GB class 10 microSD that the nook runs laggy. When I run Froyo off of the internal memory, it runs fabulously.
For reference, I got about 6MB/s on my Kingston Class 4 and 11MB/s on my Kingmax class 10. This was on my PC of course, I didn't test the speeds from then nook, but only noticed it lag and crash more often (compared with internal memory).

Which SD Cards are the best ?

I couldn't find a real answer to this anywhere, but I plan on installing CM7 to an SD Card - and boot/run from the card.
Which class of SD card should I be shooting for - and why? Are there any certain brands that work well/don't work well? The same for sizes - is 16GB going to be faster than 32GB ?
Thanks. I'm shooting for a 16 GB internal which should be more than enough space.

Sandisk class 2 or 4
Sent from my LG Optimus V using Tapatalk

Search this forum and you will find that the Sandisk class 4 disks are great. The best part is they are available at most retail stores, if your impatient. I've been using a 16gb card for a while and it runs stable and smooth.

+1 vote for Sandisk

SanDisk class 4.
Sent from my NookColor using xda premium

SanDisk class 4, 16GB
see the other topics here about sd cards, there are some good known resellers on Amazon who have real SanDisk cards, not the fakes that you can finds for cheaper some places online.

Are there known issues with other brands or faster (eg; class 6 / 10) SD cards on the NC, or is it just when booting the likes of CM7 from them?

SamboNZ said:
Are there known issues with other brands or faster (eg; class 6 / 10) SD cards on the NC, or is it just when booting the likes of CM7 from them?
Click to expand...
Click to collapse
Some other cards do have known issues or possibly don't live up to their speed class rating. You might get lucky and get a decent one out of a bunch, but its very hit or miss. Other cards have also been known to die after using them for a bit.
If you're looking for something that is reliable and is consistent, then stick with SanDisk class 4.

SamboNZ said:
Are there known issues with other brands or faster (eg; class 6 / 10) SD cards on the NC, or is it just when booting the likes of CM7 from them?
Click to expand...
Click to collapse
I tried A-data 4GB and 8GB class 6, they both run great, tried a generic 16GB class 4, horrible slow. Haven't try any SanDisk yet.

sandisk 8gb class 4 seems to work ok for me
if i went anything larger than 8gb i would want above class 4 speeds i think

Read first post here:
http://forum.xda-developers.com/showthread.php?t=1005633
sandisk CL4, 8GB and 16GB seem to be the best bet. faster cards appear to be optimized for speed and large file transfers, but the CL4 and slower cards have better small file read/write speeds.
runnnig CM7 off the card, you want the better small file read/write speeds from the CL4 and slower cards.
~mike

Anyone tested any Sandisk Class 6 cards?

Amazon Basics class 10 sdcards work pretty good for me...but i have never run a rom from the actually sd card.
But for $28 (16gb) it actually is class 10-i have all my music and videos and they all perform well. I used to get force closes on my music player back when i had music on internal memory but now that its on external sd i have no force closes
In conclusion the 16gb class 10 amazon basics for $28 has improved my phone satisfaction
Sent from my SAMSUNG-SGH-I997 using XDA App

Found one result for a Sandisk Class 6:
http://forum.xda-developers.com/showpost.php?p=21268438&postcount=317
Seems to perform well!

This does not hold if you are running off the card. I have a 16GB class 6 Kingston and it runs terribly slow. My class 4 sandisk 16GB runs great.
Sent from my NookColor using Tapatalk

prettedda said:
This does not hold if you are running off the card. I have a 16GB class 6 Kingston and it runs terribly slow. My class 4 sandisk 16GB runs great.
Sent from my NookColor using Tapatalk
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+1
Before I committed to emmc my lower class cards ran faster.
Sent from my GT-P7510 using one finger.

What monkeymike said.
Pretty much if you get anything but a class 2 or 4 Sandisk(i'd say class 4 for best of both worlds), you run a risk of an unstable system. The benchmark tests seem to put them many orders of magnitude above the higher class cards of other brands.
Plus they seem to be on special just about anywhere i've asked for them. Try radioshack if you are in the US.

I think you'll find that extensive benchmarking of a heap of cards has shown that the ones which are slow to boot are the same ones which have very low 4k random write speeds (as per monkeymike's post reference). The Sandisk 16GB Class 6 cards appear to have decent speeds for 4k random writes, ergo they will be fine to boot from. Other class 6 cards don't perform nearly as well as the Sandisk ones.

I've seen numerous benchmarks around the web showing that the Sandisk class 4's consistently match or beat the class 10's from other manufacturers and I've had great results with them in both my NC and my phones.
That said, its not going to run as well from an SD card (any sd card) as it will when properly installed as the main OS. I know this from experience. I was running CM7 from a generic class 2 for a while and it sucked. Then I got a Sandisk 16gb class 4 and that made a huge difference in usability. But over the weekend I finally took the plunge and actually installed CM7 directly on the NC-and that is a huge improvement over even the best SD card. Still, the Sandisk class 4 is a good way to test the waters.

Help me to choose a Memory card

Hiya guys,
I have been looking forward to buy a memory card of 32 GB. I have found out that there are various memory cards available of different classes. The least one is Class 4 which is the cheapest and Class 10 is the most expensive. I am not sure about the difference between the two.
I would like to know which Class memory card should be fine for the Galaxy Note ? Class 4 will work or I should choose Class 10 memory card ?
Please help me with this...

that would be the read speed.. the higher the better..
most say class 4 is plenty fast for just about everything..some say class 10 would work better if you're trying to watch say a very large video from your sdcard..
personally i think a class 4 or 6 would be enough.

I'm Using Sandisk 32GB Class 4 Memory Card.I Think It Is Best & Enough For My Galaxy Note.

Thanks guys...
I have checked the reviews on Amazon and gone through some of the threads available on this forum. I'm sure Class 4 would work for my requirements. I will choose one..
Thanks again...

CarlNote said:
I have checked the reviews on Amazon and gone through some of the threads available on this forum. I'm sure Class 4 would work for my requirements. I will choose one..
Click to expand...
Click to collapse
I'd recommend the SanDisk MobileMate series, think they're class 4 or 6, good value and excellent stability, as well as speed. Worth a look.
Sent from my GT-N7000 using xda premium

I use class 10 card because they have a better read/write time as an class 4 Card.

Currently using SanDisk 32GB class 4.
The speed is good enough for me.

Lexar 32 GB Class 10. One of the cheapest and fastest.

viper5 said:
I use class 10 card because they have a better read/write time as an class 4 Card.
Click to expand...
Click to collapse
It's worth reading up on transfer speeds versus read/writes for small files versus larger files. If you're only reading/writing large files then class 10s are what you're looking for.
If you're needing it for installing and rilunning apps or other collections of small files then class 4s will have better performance.
I've also read up that samsung are about to release some new standards with much higher data transfer rates, I'm not sure the note will make full use of them, but they'll be quick transers:
http://www.expertreviews.co.uk/memo...-goes-high-speed-with-new-uhs-1-microsd-cards
Sent from my GT-N7000 using xda premium

Mine is a Sandisk 32 Gb Class 2, I'm one of the suckers who bought the first time a 32Gb MicroSD got released and payed double the current price..
But it is good enough, I can play large movies up to 3+Gb
**while you're at it, you might want to consider buying 64Gb MicroSDXC instead. http://forum.xda-developers.com/showthread.php?t=1330784

For listening to music or viewing films, classes 4 or 6 are ok (even class 2 from a good manufacturer like SanDisk).
It's when copying large music libraries or films that you appreciate having a class 10 card. And if you intend to use your GN for viewing lots of films, then you'll have to carry copy operations quite often...
Sent from my GT-N7000 using xda premium