Database Users

SD Compatibility List??

Just wondering if anyone knew what brands work better than others. I recently put a Patriot 8GB class 4 in my N1 and it causes massive stability problems under read/write access to the SD card. Usually results in a freeze then reboot. Can anyone reccomend a more suitable brand?? thanks!

I don't think it is as important on the nexus as it was on say a G1 ot MT3G. Unless you are still running a2sd. Obviously the higher the card's class, the faster your transfer will be. I would still stick to the higer class cards. Transcend and Sandisk both make really good class 6 cards.

Know-Fear said:
I don't think it is as important on the nexus as it was on say a G1 ot MT3G. Unless you are still running a2sd. Obviously the higher the card's class, the faster your transfer will be. I would still stick to the higer class cards. Transcend and Sandisk both make really good class 6 cards.
Click to expand...
Click to collapse
The 4GB that came with the nexus was a Sandisk Class 2. the class 4 patriot doesnt really seem to make a difference in speed, so I just should have stuck with the original brand

Anyone using a class 10 card?

Hey. Just curious how many of you have replaced the stock 16gb class 2 sdcard with class 4,6 or 10. Can you chime in with your inputs on performance between these classes. I know the theoretical transfer speeds, but I am curious how they actually perform in day to day use. Would jumping from a class 2 to class 6 be noticeable, or a class 6 to class 10?
Thanks

I am interested to.
Have just upgraded to an Ebay 16gig Class 6. Speed is faster than a Class 2 but not sure if it is a Class 4 or class 6.
Tempted to buy a 8gig Class 10 but struggling to find a reputable source of these.
In case you don't know Class x denotes the write speed. Class 2 has a 2meg/sec. Class 6 has a 6meg/sec write speed. Also gt a increase in read speed. All must be good for the HD unless the Interface is slower than the card??

dusty_nz said:
I am interested to.
Have just upgraded to an Ebay 16gig Class 6. Speed is faster than a Class 2 but not sure if it is a Class 4 or class 6.
Tempted to buy a 8gig Class 10 but struggling to find a reputable source of these.
In case you don't know Class x denotes the write speed. Class 2 has a 2meg/sec. Class 6 has a 6meg/sec write speed. Also gt a increase in read speed. All must be good for the HD unless the Interface is slower than the card??
Click to expand...
Click to collapse
From my reading and investigation, not many devices out there support such high speed, I'm thinking phone isn't one of the device that do. I would like to see someone do some testing and see if there is a difference on a HD2 between a class 6 vs class 10.

I didn't know they had a class 10, but I'm running a class 6 and I can tell the difference from the 16gb stock card. Loading Android is a lot faster too.
Sent from my HTC HD2 using XDA App

I have a class 10... Its a great diference.

I've got a couple of 16Gig class 2s and a 4Gig class 10. I can certainly tell a difference. I haven't done any empirical testing but gut says it's almost twice as quick. The difference comes when you multitask, getting a couple apps open, app loading, etc.
The problem with the 4Gig is the obvious lack of size. I'm thinking of buying a 32Gig class 4.

xicko said:
I have a class 10... Its a great diference.
Click to expand...
Click to collapse
between a class 6 and 10, is there still any noticeable improvements with the phone?

I want video evidence.

Lorddeff07 said:
I want video evidence.
Click to expand...
Click to collapse
Agree! A video might help us to decide if it is worth buying a class 10 card.

bangsters said:
between a class 6 and 10, is there still any noticeable improvements with the phone?
Click to expand...
Click to collapse
Looking at numbers alone, a class 6 is three times faster than a class 2 and a class 10 is five times faster than a class 2 so upgrading from a class 2 would appear to be a sure fire bet in both cases
In comparison a class 10 is only 1.6 times faster than a class 6.
So I think I will stick with my class 6 for now until class 12+ comes out.

So in conclusion do you guys think a faster SD card is necessory? because once xda team finish develop a perfect android rom i believe they are gonna make it a rom, in that case we would'nt need a faster SD card, But i really wonder if a faster SD card improves the performance? Can someone kindly provide a video for this ? Thanks ,,

class 10
I have a 16gb kingston class 10, compared to my Transcend 8gb class 6, not that much difference, compared to my Class 2 16gb that came with the phone? huge difference.

I'm now going out, to buy a 16GB classe 4 , i think is sufficient, given that in September Cttula will provide NAND, and the class will no longer important, and I'd rather have more space for my photos and videos, in vacation than a business card 8GBclasse10 faster.

Is the ETA for NAND September?

Nand speed vs. Class 10 card?
Anyone know what the read/write speed of the nand memory is as compared to the say the read/write speed of a class 10 card? I know it should be faster, but is it really that much faster?

bangsters said:
Hey. Just curious how many of you have replaced the stock 16gb class 2 sdcard with class 4,6 or 10. Can you chime in with your inputs on performance between these classes. I know the theoretical transfer speeds, but I am curious how they actually perform in day to day use. Would jumping from a class 2 to class 6 be noticeable, or a class 6 to class 10?
Thanks
Click to expand...
Click to collapse
i got class 10 kingston 16gb,
transfers between pc and phone is up tp 6 mb/s read and write, but on the phone it self i think it's faster.
previously i had class 2, 8gb sandisk and it was alot slower...

how do I know which class the SD card is?

i use a class 10 card in my digital slr and it makes quite a big difference. i'm sure it would create a significant performance boost with android

pack21 said:
I'm now going out, to buy a 16GB classe 4 , i think is sufficient, given that in September Cttula will provide NAND, and the class will no longer important, and I'd rather have more space for my photos and videos, in vacation than a business card 8GBclasse10 faster.
Click to expand...
Click to collapse
I dont find any microSD 16gb classe4 just, classe 2 and classe 10 - 100€
8gb classe4 i found for 20€

somebully said:
Is the ETA for NAND September?
Click to expand...
Click to collapse
Yes
reocej said:
Anyone know what the read/write speed of the nand memory is as compared to the say the read/write speed of a class 10 card? I know it should be faster, but is it really that much faster?
Click to expand...
Click to collapse
I think, it cant be comparable....starting by speed and smooth.

[Q] Cass 10 SD cards causing BSoD and Wake Delay

This is an observation across several different builds with Hastrain 8.5.x and MDJ 7-8 kernels:
ScanDisk Class 2 MicroSD -- runs smooth without any problems
Any Class 10 MicroSD that i have tried -- frequent wake from sleep screen delays and occaionals BSoD
I have tried MDG Revolution 1.7, CoreDroid, Topia Series with Hastrain 8.5.x and MDJ 7-8 kernels.
The problem with Class 10 microSD cards is consistent and dissapears instantly after switching back to a Class 2 microSD.
I am not sure why, perhapps it has something to do with power consumption.
It would be great is Hastrain or MDJ could look into this problem.
Any feedback would be appreciated!
Thanks

That's not your card. That happens to all class cards on all builds. Some people say its fixed but that is straight BS. Like you, I wish it was fixed once and for all.

Maybe your class 10 card is error. Use flash card software to test it (in reading/writing testing).

I think i have found the problem. When i come back
From standby the wlan stopped and then comes back.
I tested it i deactivated wlan and test it no freezes when
Wlan is activated it freezes.

Is the class 10 also a sandisk card?
Sent from my HD2 using XDA App

I have one Kingmax class 10 16G and one Toshiba class 2 16G. I got the same problem only when using the class 10 ,especially on the phone call page.

mkutsen said:
This is an observation across several different builds with Hastrain 8.5.x and MDJ 7-8 kernels:
ScanDisk Class 2 MicroSD -- runs smooth without any problems
Any Class 10 MicroSD that i have tried -- frequent wake from sleep screen delays and occaionals BSoD
I have tried MDG Revolution 1.7, CoreDroid, Topia Series with Hastrain 8.5.x and MDJ 7-8 kernels.
The problem with Class 10 microSD cards is consistent and dissapears instantly after switching back to a Class 2 microSD.
I am not sure why, perhapps it has something to do with power consumption.
It would be great is Hastrain or MDJ could look into this problem.
Any feedback would be appreciated!
Thanks
Click to expand...
Click to collapse
I have the same problem like you. Everytime I tried to use my wintec calss 10 sd card for the android, the system will lag and have BSoD. When it wake up from sleep mode, it is very laggy. So I think the HD2 Android does not support using the Calss 10 Card.
PS. I tried the class 10 in window Vista but it doesn't have any problem. Therefore, I am sure it's not the card problem.

Perform a full disk check and also a benchmark.
Compare it to your Class 2 card.
Then proceed to copy 2 gig of data to it. If it is class 10 it should sustain 10MB/sec for the entire copy. If not you may see 10 at the start but then it slowly gets slower. Also the card will get very hot.
Its starting to get very difficult to get genuine cards. I have a number of Class 10's. One from ebay and another 2 from local stores. All are fakes.
I have a class 4 which is the best I have got so far. Can copy GB's to it and it stays constant for the whole copy. Others start of good but 1/2 way the card is really hot and only getting 50kb/sec

In my experience, only 3 card brands work, sandisk, samsung and toshiba. Kingmax, wintec and patriot didn't. I guess the class didn't matter.
Sent from my HD2 using XDA App

mattfmartin said:
That's not your card. That happens to all class cards on all builds. Some people say its fixed but that is straight BS. Like you, I wish it was fixed once and for all.
Click to expand...
Click to collapse
Its device-dependent.
My old HD2 had loads of lag when "waking up" but since I broke it and got a new one, I have had almost no wake-up lag. The longest I ever have to wait for the screen to come on is 2-3 seconds, and usually its less.
Perhaps different microSD cards exacerbate the problem, but the underlying problem is in your HD2 itself. I use a Class 6 card myself.

Been using a class 10 card ever since I got my HD2 in the summer. Works fine here..
It's a Kingston class 10 SD, dunno if that helps

jose makalolot said:
Is the class 10 also a sandisk card?
Sent from my HD2 using XDA App
Click to expand...
Click to collapse
I have 3 sdcards
Sandisk 8GB Class 6 (write ca. 7mb/s) freezing
Sandisk 8GB Class 4 (write ca. 5mb/s) freezing
Sandisk 8GB Class 2 (write ca. 2.5mb/s) testing know !!! I give in few hours feedback.

I also experience slow wake ups with both of my class 6 cards as compared to my class 2 16 gig. On my class 2, wake up is instant. On my class 6 cards (4gig and 8gig), wake time is approximately 3 to 5 seconds. I really wish someone could figure this out because of the difference in file transfer speeds; my class 2 is almost unbearable.

It would be interesting if you could all try using this build over here:
http://forum.xda-developers.com/showthread.php?t=870518
Darkstone's build puts everything into RAM so that your SD card shouldn't matter. Why don't you report back and tell us if that fixes your crashing/sleep problems?

nimsim said:
Been using a class 10 card ever since I got my HD2 in the summer. Works fine here..
It's a Kingston class 10 SD, dunno if that helps
Click to expand...
Click to collapse
I think the key factor is to stay with quality name brand cards. My class 2 is Sandisk and my class 6 4/8gig are off brand. I'm going to try different format settings and see what I can come up with. I post back if I find anything significant.

pkchips said:
Its device-dependent.
My old HD2 had loads of lag when "waking up" but since I broke it and got a new one, I have had almost no wake-up lag. The longest I ever have to wait for the screen to come on is 2-3 seconds, and usually its less.
Perhaps different microSD cards exacerbate the problem, but the underlying problem is in your HD2 itself. I use a Class 6 card myself.
Click to expand...
Click to collapse
I think you are all forgetting my post.
The SAME sd card can be fast in one HD2 and crap in another HD2.

hi
probably your sd card is abnormal cause some of the kingston and other cards are made with errors,i had a similar sd card from kingston i dont know whatever i did with it formatted it multiple times it never booted an
android build,i booted in ubuntu and used disk utility it had a lot of errors then googled and came to find out that there were batches of kingston cards with similar errors coz 1 tech support guy in an fabrication organisation found it it and they sent all the batch of their cards to kingston for replacement which kingston did,i am using the card in garmin gps as storage i think these error cards see the batch number and see other original cards they are slightly different with their numbers as well as letters you can google it and find it out.thats why be careful from where you buy it.
try using disk utility in ubuntu you may find out what is wrong with it call the company and try to replace it

Fake cards
What I was alluding to in my previous post was all the name brand cards are suffering have fakes. Right down to holograms etc on the boxes.
Even retailers are getting caught out as the shipments are getting hijacked on the way and good cards are being swapped for fakes.
Very simply you can take a class 2 card and change the clock to run at high speed. Runs great for the few first seconds however quickly overheats and starts to fail with write errors etc.
I have "Genuine" Sandisk and Kingston cards here. Both bench great but when copying a large amount of data to it it gets hotter and hotter. Eventually crawling at ridiculous speeds. Keep pushing it and I start getting write errors.
Finally picked up a genuine Kingston. Only a class 4 but after 4GB sustained writes it is still only warm and pushing 4.1mb/sec.
Compared to my Sandisk (With hologram) Class 8 which can only do 200kb/sec after 1GB of data. Eventually will fail before 2gb ram.

Yanardag said:
I have 3 sdcards
Sandisk 8GB Class 6 (write ca. 7mb/s) freezing
Sandisk 8GB Class 4 (write ca. 5mb/s) freezing
Sandisk 8GB Class 2 (write ca. 2.5mb/s) testing know !!! I give in few hours feedback.
Click to expand...
Click to collapse
Ok i have tested the Class 2 card. It freezes too.
I find the freezing comes after ~10min. Before 10min.
Is nothing from this cards freez the lockscreen.
I think wlan is major problem. With wlan off is nothing freezing,
Mobile data i have not tested.

wlan = wifi ?

Hd2 Scroll Lag?

A quick flick to scroll seems to be impossible. Does anyone know the registry tweak that edits the initial scroll lag? Thanks!
Searched but I cant find it?

Does no one know? Everyone is looking but no answers. lol.

rebump. Nyone?

use a compatible SD card

yshi41 said:
use a compatible SD card
Click to expand...
Click to collapse
um yes, thanks but no thanks. I have a compatible sd card. if it isn't i wouldnt be able to use wp7.
my card works and has always worked. even with android i had no problem.
So you're telling me you have super fast flick-ing action? I highly doubt it.
Anyone else with a better suggestion?

Yeah, I have one - change your SD card.

I have great scrolling, no lag at all. The SD card makes a huge difference. When I was using a class 4 kingston, wp7 was laggy and didn't run that well... it still ran and used the card, though. But now using a class 2 sandisk, wp7 runs as smooth as butter... no lag and battery life is much improved. What kind of card do you have? Cards with good random access speed is what you want for wp7... usually lower class cards have better random access speed than higher class cards. Class 2 sandisk seem to work consistently well, but I guess some people have had issues. But even cards that are same class and same brand, but have different manufacturing numbers or serial numbers will be very different performance wise.

i have a sandisk 8GB class 4. it has never had any problem.
are you guys telling me that by downgrading to a class 2, i may have a faster WP7 OS?
that is ridiculous!
can anyone confirm this?

I'm still using Class 4
I will backup my data and test this tomorrow.

lemonspeakers said:
i have a sandisk 8GB class 4. it has never had any problem.
are you guys telling me that by downgrading to a class 2, i may have a faster WP7 OS?
that is ridiculous!
can anyone confirm this?
Click to expand...
Click to collapse
You might... it really depends on the sd card. Sandisk class 2 cards made at one time can be very different than sandisk class 2 cards made 6 months later. Same with class 4 or with any sd card out there. When it comes to the random access speed, it can vary greatly... manufacturers don't test this speed and don't aim to make consistent scores of that. But usually the tricks that manufacturers do to get better sequential write scores on their chips end up hurting the random access speeds. That's why more class 2 cards are compatible and work better with wp7 than class 4, 6 and 10 cards. And if you are having lag, then that means you can definitely do better, because I have no lag at all at this point... maybe every once in a while I'll get a little lag here or there, but overall, it's VERY smooth. I haven't installed my apps yet... only like 10 or so apps from the market, and only copied one music album over so far, so maybe I'll get more lag when more is installed... not sure. I have 21gb partitioned over for wp7 on my sandisk class 2 32gb card. When I was using a kingston class 4, I definitely had a lot of lags and I hadn't even installed anything at that point. But I have heard that sandisk class 4 works good, too, but, like I said, when and what factory the chips were produced in can make a big difference with the random access speed which is what wp7 needs to be smooth.

cdguider said:
I will backup my data and test this tomorrow.
Click to expand...
Click to collapse
how was your test so far?
please let me know thanks =D

Lag ???? WP7 is smooth as butter, this is why I'm still using WP7 over LAGGY Android.
ps: I'm using Sandisk 2gig class 2

It's all to do with your micro SD card, my old Samsung 8gb card, ran ok, but would somtimes lag, not load marketplace, things would crash and the occassional autoreboot as well, so I ordered one of the Microsoft recommended sandisk 8 GB ultra microsd cards, not a single lag, no crashes, things run so smooth and fast its really quiet amazing. How ever many times and different ways you format your card if its not the right one it will never run wp7 smoothly

Have a Sandisk 16GB Class 2. in Marketplace lags, slow download, slow load pictures
I have downloaded `` Xbox Live Extras `` in Market, took 10 minutes to install, download deducted

jenzy1985 said:
Have a Sandisk 16GB Class 2. in Marketplace lags, slow download, slow load pictures
I have downloaded `` Xbox Live Extras `` in Market, took 10 minutes to install, download deducted
Click to expand...
Click to collapse
Could be a fake one? Whats the model number?
I have the 8gb and 16gb ones recommended for WP7 by sandisk and they work perfectly without any lag.

mickfarr said:
Could be a fake one? Whats the model number?
I have the 8gb and 16gb ones recommended for WP7 by sandisk and they work perfectly without any lag.
Click to expand...
Click to collapse
Fake, no why? I bought it yesterday in the mobile phone shop. The dealer said it was the new version. The old cards would have to send them back. Really no Joke

jenzy1985 said:
Fake, no why? I bought it yesterday in the mobile phone shop. The dealer said it was the new version. The old cards would have to send them back. Really no Joke
Click to expand...
Click to collapse
You should take the class 2 sandisk back and order a class 2 sandisk from somewhere else... most class 2 sandisks work great with wp7. But like I said in several other posts, just because the brand and class are the same, doesn't mean the card will perform the same. They don't test the random access speed on cards so it's not consistent on cards, and it's random access speed that matters with wp7. I was just testing my cards today... I have one class 2 16gb sandisk with great random access speed and works great in wp7, and I have another class 2 sandisk that has bad random access speed and makes wp7 laggy. The read and write speeds were the same on the cards, though. My class 2 32gb sandisk has good random access speed, and my class 4 32gb sandisk I just got yesterday has even better, but my old class 4 sandisk 4gb card has terrible random access speed. My class 4 32gb kingston and my class 6 8gb kingston both have terrible random access speed as well.
Cards of same class from same manufacturer can have different chips made in different factories depending on when and where they were made. Also, a lot of the time, the chips the they make to have higher sequential read and write speeds will have worse random access speeds, so you will probably have better luck running wp7 with a class 2 than with a class 6 or 10. Microsoft reported this from their testing of memory cards for wp7. This doesn't necessarily mean a class 4 or 6 card won't work just as good or better than some class 2 cards, and it doesn't necessarily mean a class 2 card will work well. The problem is that the random access speed is not rated for cards so it's not kept consistent on cards. But at this time, it seems the class 2 sandisk seem to have the most consistent high random access speeds, but again, doesn't mean all of them will. Like I said, I have a class 2 16gb sandisk that doesn't work well (which is the one I bought retail), but the class 2 16gb sandisk that came with my phone works very well. Also, I just got a new class 4 sandisk 32gb card which I haven't tried for wp7 yet, but from benchmarking the card, it looks like it will work very well. I'm gonna test it with wp7 tonight.

[Q] Which sd card is better?

So Ive been using the 16gb Class 2 sd card that came with my HD2 for WP7 and I havent really had any problems with it. Occasionally it reboots for no reason, but aside from that, its perfect. However, my friend just gave me his 4gb Class 4 card. Should I keep using the 16gb or reset my phone with the faster 4gb?

simple test, all sd cards work differently
my Nokia 4GB Class 6 is better than may Sandisk 16GB Class 2
Xbox Live Installation: ( only the installation without download )
Nokia 4GB Class 6: 1:23 minutes
Sandisk 16GB Class 2: 9:41 minutes

peace warhead said:
So Ive been using the 16gb Class 2 sd card that came with my HD2 for WP7 and I havent really had any problems with it. Occasionally it reboots for no reason, but aside from that, its perfect. However, my friend just gave me his 4gb Class 4 card. Should I keep using the 16gb or reset my phone with the faster 4gb?
Click to expand...
Click to collapse
Class 2 cards usually work better for wp7. Actually class means nothing when it comes to wp7... you want good random access speed for wp7 to run smooth. Many times, the tricks that manufacturers do to their cards to get higher sequential write speeds will actually reduce the random access speed. They don't keep the random access speed consistent on any of their cards as that speed isn't rated, so even cards of the same brand and class can differ greatly from batch to batch. A card made one day may run wp7 well while the same card made a month later may not. So far it seems class 2 sandisk are the most consistent in keeping good random access speed, so if you are going for a card for wp7, go for class 2 sandisk with model numbers ending in A11M. If you already have a card that works well, no reason to switch unless you want to change the size, because there's no way to guarantee a card will work well until it's tested.