Database Users

Is a Class2 SD card sufficient for running Android?

Hi all,
I'm going to finally have some spare time this weekend and might even get to have a mess around with Android on my HD2 if I get lucky! My concern is that I have a 16GB Class2 microSD in my Leo and while looking at HD2 stuff on ebay came across this.
The seller states that Android won't run (properly?) on his 16gb Class2 and includes a Class6 8gb card aswell for this purpose.
What's everyone's experience with running Android on a slower card? From looking around I've seen people saying 'there isn't much difference' for most things but a lot of contridictions for others.
Thanks gang!

I have no issues with my Android build currently, and it's on a 4gb Class 2 SD card.
It does help having a faster one, but It's not the end of the world.
Phil

Have been testing out froyostone sense build on a 2gb class 2 card and it's like lightening So yes, would format first though otherwise you will get lag.

Cheers - yep I won't forget to format, been reading the threads while working this week... taken in loads of info, just need to find the time to actually get it rolling

I was wondering the same thing. I installed froyostone 08.07.2010 using miri Rom on stock radio on a friends hd2 and it freezes and comes back to life very often. Would a higher class sdcard solve his problem?

I think they guy on eBay is talking rubbish. I run darkstone's 2.2 perfectly well on a 16GB Class 2. A Class 4 would probably help a little bit, but I'm not that fussed really.
I'd be more concerned about getting dodgy copies of Transformers from them!!

murdaralph said:
I was wondering the same thing. I installed froyostone 08.07.2010 using miri Rom on stock radio on a friends hd2 and it freezes and comes back to life very often. Would a higher class sdcard solve his problem?
Click to expand...
Click to collapse
The whole OS and all animations etc, or just touch screen response?
If its the touch screen, that's a known issue and will be addressed in due course.
Phil

It's in german, but i guess u may figure it out.
h**p://***.chip.de/bestenlisten/Bestenliste-microSD-Karten--index/detail/id/867/

I have a kingston class 2 , not working.

qingcai said:
I have a kingston class 2 , not working.
Click to expand...
Click to collapse
A Little more information would be useful, what's not working about it? How's it formatted? Has it even been formatted and then had a new build copied to it?
Phil

i never had issues with a class 2 before... no SOD or anything... although after switching to class 4, there is noticeable speed. now in class 10, a lot faster. but no real issues in class 2 except a tad slower (but decent speed nonetheless)

I use the 16gb class 2 card and its quick with decent quadrant tests. I think its because android loads into ram (please correct me if I am wrong, ill search for this later). I think there are apps that read or write to folders on the SD card that would gain from speed of a class 6 or 10 card and if I am right about loading to ram the boot up time could receive a benefit.
Personally I am looking to get one just to access media faster and for taking pics and vids as there is a write delay that's typical with all phones. If it helps android in its current state the cool but I'm not in a rush. Development here have made great strides in making android snappy and android is an awesome is as it is for handling background tasks. Much to the credit of Linux but I find android to be a faster evolution then most mobile oses. Much to the credit of being open source and encourage community development. Nothing here is illegal but maybe some grey areas in closed source distributing which cyanogen had an interesting situation that was resolved quickly with Google's assistance.
But I am off topic now. Yes it would help with some things but don't break the piggy bank over it.
Hope my thoughts are helpful. It would be better to get feedback from those that have done it and get before and after boot, quad, and market download responsiveness tests. I may have a class 6 8gb card somewhere I can test later tonight. I would do fresh sdformatter formats with nothing but android on the card to get a somewhat standard benchmark.
Sent from my HTC HD2 using XDA App

Mine is 16gb class 2, with the latest fullram zimage, i score 29.2fps in neocore test
and can play sparta! very smooth, also the asphalt 5

kerman19 said:
The whole OS and all animations etc, or just touch screen response?
If its the touch screen, that's a known issue and will be addressed in due course.
Phil
Click to expand...
Click to collapse
the touch screen. The SD card was quick formatted. Would that make a difference in the builds performance ?

I'm using a Kingston class 2, but it performs with 5,5MBs writing speed when used in a computer slot, so in practice its a class 5,5. Works great! Froyostone sense v1

pappadj said:
I use the 16gb class 2 card and its quick with decent quadrant tests. I think its because android loads into ram (please correct me if I am wrong, ill search for this later). I think there are apps that read or write to folders on the SD card that would gain from speed of a class 6 or 10 card and if I am right about loading to ram the boot up time could receive a benefit.
Personally I am looking to get one just to access media faster and for taking pics and vids as there is a write delay that's typical with all phones. If it helps android in its current state the cool but I'm not in a rush. Development here have made great strides in making android snappy and android is an awesome is as it is for handling background tasks. Much to the credit of Linux but I find android to be a faster evolution then most mobile oses. Much to the credit of being open source and encourage community development. Nothing here is illegal but maybe some grey areas in closed source distributing which cyanogen had an interesting situation that was resolved quickly with Google's assistance.
But I am off topic now. Yes it would help with some things but don't break the piggy bank over it.
Hope my thoughts are helpful. It would be better to get feedback from those that have done it and get before and after boot, quad, and market download responsiveness tests. I may have a class 6 8gb card somewhere I can test later tonight. I would do fresh sdformatter formats with nothing but android on the card to get a somewhat standard benchmark.
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
You have experience with your G1, the class 6 I use on mine makes definite difference when running apps from your sd card. I've been alternating using my 16 GB Class 2 and my 8 GB Class 6 in my HD2 but I haven't seen any speed difference with android so I believe that it runs on the internal ram.

i think class 2 is enough

murdaralph said:
the touch screen. The SD card was quick formatted. Would that make a difference in the builds performance ?
Click to expand...
Click to collapse
Touch Screen lag/freezing is a known issue right now and doesn't relate to the SD card.
It's being worked on.
Phil

I have a class 2 16GB sandisk drive and score 1578 in quadrant standard, that said i usually get write speeds of around 6MB/sec on my computer

i personally think it helps a bit ( i ws previously running Android off the 16GB class 2 card the HD2 came with) but experienced some lag when scrolling.
That said, it was an early build of Android so it was probably just that.
The thing is, 8GB class6 cards are relatively cheap to buy (i picked up an A-DATA 8GB class 6 for $21 canadian at CanadaComputers)
so..why not upgrade to the class6 card? I'm sure it wouldn't hurt and no matter what you'll experience at least have SOME sort of performance gain in other aspects (music, pictures, file managers, etc)

[Q] microSD card problem

Hello,
I installed Android on my HD2, worked perfectly for 2 weeks. But my microSD was only 2GB, so I buyed a new one.
Kingston class 4 8gb microSD. Putted everything just on the new SD card, didn't changed anything! Formatted it also to FAT32.
Now the problem is that Android is VERY slow with getting out of standby, takes sometimes 10 seconds. I get a black screen for 10 seconds and then Android comes up.
Also starting up Android takes ages and it sometimes just freezes or gives a blue screen.
Has this something to do with Android or is the microSD card broken in a way? I can still move/delete files on the microSD card.
Anyone got at solution?
Thanks

Did you try a different build? Perhaps try Mdeejay rEVOlution build, fastest build i've used so far,very very fast, smooth and stable. Also try updating your radio.
I bet there are several utilities to test the read and write speeds on your microSD card. You'll need a cardreader in your pc to do that, trying it through WM6 won't work because the USB will be the one controlling the max speeds.

I hope this helps a lot of people struggling with the speed of android running off SD.
My suggestion is that the card size, and not just the card speed plays an important part in the speed at which android runs...
My Evidence. I first installed various builds on a variety of Sandisk 2GB and 4GB Class 2 cards. They all ran super fast... I mean no lag at all, ever. It might as well have been a Desire HD. Being that i wanted more space I used my 16GB Sandisk Class 2 that I have been using for WM, reformatted it and installed android. It was cripplingly slow. Unusable in fact. (i tried reformat/reinstall a couple of times before giving up). I then invested in a Class 4 16GB and installed the same build. Not surprisingly this was faster, usable but still not as fast as it was on the 4GB Class 2. I am going to go back the the 4GB card unfortunately until NAND arrives.
Murg

murgers said:
I hope this helps a lot of people struggling with the speed of android running off SD.
My suggestion is that the card size, and not just the card speed plays an important part in the speed at which android runs...
My Evidence. I first installed various builds on a variety of Sandisk 2GB and 4GB Class 2 cards. They all ran super fast... I mean no lag at all, ever. It might as well have been a Desire HD. Being that i wanted more space I used my 16GB Sandisk Class 2 that I have been using for WM, reformatted it and installed android. It was cripplingly slow. Unusable in fact. (i tried reformat/reinstall a couple of times before giving up). I then invested in a Class 4 16GB and installed the same build. Not surprisingly this was faster, usable but still not as fast as it was on the 4GB Class 2. I am going to go back the the 4GB card unfortunately until NAND arrives.
Murg
Click to expand...
Click to collapse
Thanks for the reply!
First i'm going to test the Mdeejay rEVOlution build, hopefully it will run smooth and fast. If not, i'm gonna send back my 8GB card and get a new 4GB class 4 card.
At the moment I'm running Froyostone 3.2, works now perfectly with the 2GB microSDcard.
I will post the results.

murgers said:
My suggestion is that the card size, and not just the card speed plays an important part in the speed at which android runs...
Click to expand...
Click to collapse
I totally agree with this, although I cannot figure out why.
I tested with two almost identical cards, both Samsung class 4, one 2Gb, one 8Gb, formatted FAT32 64k clusters via the same memory card reader/pc. The 2Gb one whizzed along with the build I'm running now, the 8Gb one occassionally stuttered and stalled. Seems odd to me, unless fragmentation comes into play maybe?
The only reason I have stuck with the 8Gb is for my music. Oh how I'd love to stick with my 2Gb card for the speed and have a second SD slot for my music.

SD read/write speed causing lag on my HD2 but...

So I downloaded this app call H2testw.exe to test for legit sdcards but it also tells the read/write speed as well. I am testing my 8gb and 1gb cards. I set it to write a 300 mb files to the card and verify it.
Info about Android running on the two cards:
8gb = lags coming out of sleep, touch screen freezes, write~7.5 mb/s, read~12mb/s
1gb = no lags, no touch screen, write~4.3mb, read~13mb/s
I'm confused. The read speed is almost the same yet the 1gb microsd is more responsive running MDJ android compared to the 8gb microsd. Any thought?
UPDATE: Maybe this is what's causing the problem. Stolen from Engadget.
What we've learned from our tipsters and from documents culled from Microsoft, Samsung, and others is that the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times. There's some rocket science involved here, but basically, it's a tradeoff and a bit of a gamble -- if a manufacturer tunes a card for a high class rating, it takes more time to access the first byte at a new location on the card because it's optimizing access for that area of memory, but once it does that, it can blast sequential bytes at very high speed. If you've got a lot of small reads or writes you need to make to different files at different locations in the card's memory, though, you really start to suffer. Cards with lower class ratings tend to spend less time optimizing sequential access prior to the first read / write operation, so it can move around the card (that is, access it randomly) much faster.
Click to expand...
Click to collapse
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/

They are probably different classes, plus it naturally takes longer with a bigger card because there's more files and more space to read and write
Sent from my HD2 Nexus One using XDA App

I get screen freezes with 8gb and up but rarely with new builds, haven't tried a card higher than class 6
Also I'm on radio 2.15
Sent from my HD2 Nexus One using XDA App

Oddly enough, I have two 8gb cards, one class 4 the other class 6, and they hiccup more than my 16gb class 2.
Now that is weird.

I'm lost myself...I'm thinking off just getting me a 4gb card and hope for the best...

I heard the 16gb class 10 is perfect but it still cost to much for nand to be around the corner
Sent from my HD2 Nexus One using XDA App

16 gb class 10 no lag cost me over 100 pounds tho
Sent from my HTC Desire using XDA App

Cheapest 16GB - lags from time to time :/
Maybe defragmentation may help?

tomus said:
Cheapest 16GB - lags from time to time :/
Maybe defragmentation may help?
Click to expand...
Click to collapse
Defrag wont help...scan for errors...try to have only the android folder and see if it makes a different ..

Btw, guys...
all sd cards are not created equal. all sd cards of the same CLASS are not created equal.
Check out the ongoing drama with win7 phones with SD slots....
class measures throughput, what affects the SOD and related issues is random access speed, not throughput so much.

It's just my 2 cents, but I've tested Class 2, 4, and 6 MicroSDHC cards and found very little noticeable difference once Android is fully booted up and running on the HD2. Moreover, none of the cards create screen freezes or SOD issues or high battery drain problems here. That said, I have noticed that the actual boot time and file transfer speed (from the PC to the card) can be faster on average with quality higher class rated cards of the same size. Also, I've found that the larger the card size, the longer the android boot time, no matter the class. Guess that makes sense, as the system need to read more sectors with larger size cards. Please note that I've only tested Sandisk, Toshiba, TopRam and Samsung cards to date. What's kind of strange is that the Class 2 16 & 32GB Sandisk cards run just as well or slightly better for some reason than some of my higher class rated cards. Go figure...
As far as issues go, I recommend only using quality brand name cards, no ebay fakes or cheap no name brands. Also, I've had great luck formatting all my cards with SD Formatter v2.0 and v3.0, using the quick format mode with the standard 32kb cluster size.
Best to all,
R

rhacy said:
It's just my 2 cents, but I've tested Class 2, 4, and 6 MicroSDHC cards and found very little noticeable difference once Android is fully booted up and running on the HD2. Moreover, none of the cards create screen freezes or SOD issues or high battery drain problems here. That said, I have noticed that the actual boot time and file transfer speed (from the PC to the card) can be faster on average with quality higher class rated cards of the same size. Also, I've found that the larger the card size, the longer the android boot time, no matter the class. Guess that makes sense, as the system need to read more sectors with larger size cards. Please note that I've only tested Sandisk, Toshiba, TopRam and Samsung cards to date. What's kind of strange is that the Class 2 16 & 32GB Sandisk cards run just as well or slightly better for some reason than some of my higher class rated cards. Go figure...
As far as issues go, I recommend only using quality brand name cards, no ebay fakes or cheap no name brands. Also, I've had great luck formatting all my cards with SD Formatter v2.0 and v3.0, using the quick format mode with the standard 32kb cluster size.
Best to all,
R
Click to expand...
Click to collapse
Great info here. I think I will just order me a new card from a reputable brand. Maybe my card is just getting old. Maybe a 16gb from Amazon will do. They aren't too expensive nowaday. ~$26.

Does the Radio version effects the lag of the sd card? Or the kernel?

distruct said:
Does the Radio version effects the lag of the sd card? Or the kernel?
Click to expand...
Click to collapse
No, not on the sd but radio does effect how the build will run, your phone calls, your battery.

Could this be the reason why class don't matter on hd2 android? I mean even some class 4 & 6 have lag and sod problem. I pulled this bit from engadget. It's an article on wp7 and memory card issues.
What we've learned from our tipsters and from documents culled from Microsoft, Samsung, and others is that the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times. There's some rocket science involved here, but basically, it's a tradeoff and a bit of a gamble -- if a manufacturer tunes a card for a high class rating, it takes more time to access the first byte at a new location on the card because it's optimizing access for that area of memory, but once it does that, it can blast sequential bytes at very high speed. If you've got a lot of small reads or writes you need to make to different files at different locations in the card's memory, though, you really start to suffer. Cards with lower class ratings tend to spend less time optimizing sequential access prior to the first read / write operation, so it can move around the card (that is, access it randomly) much faster.
Click to expand...
Click to collapse
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/

azzzz said:
Could this be the reason why class don't matter on hd2 android? I mean even some class 4 & 6 have lag and sod problem. I pulled this bit from engadget. It's an article on wp7 and memory card issues.
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/
Click to expand...
Click to collapse
Obviously.
Been saying this for a while, myself - I have experimented, and I get SOD every time with my 16gb class 6 card, but rarely with my class 2 8gb, and never ever (and, tbh, better responsiveness overall) with my 2gb NON-HC card

enneract said:
Obviously.
Been saying this for a while, myself - I have experimented, and I get SOD every time with my 16gb class 6 card, but rarely with my class 2 8gb, and never ever (and, tbh, better responsiveness overall) with my 2gb NON-HC card
Click to expand...
Click to collapse
I hope so...my class 2 16gb will be here in a couple of days...i hope it's faster than my current 8gb class 4....
Update: my 16gb class 2 sandisk is here. Things have improved alot. Wake up is faster now with less lag, market download speed is faster now (10kb vs 100kb). Hopefully system performance will be better...

[Q] SD Card Worth It?

I am going to pick one of these up, but before I did, had a quick question (anyone with a WP7 can answer)
Do you feel that 8gb is enough space? Or do you wish you had more? Should I get an SD Card?

Most definitely. I have loaded most of my music and a few videos and I already used over 6GB. That's pretty much all the stock phone has. Now, I have over 14GB still left. Might put some movies on it.

My only disappointment in the focus is the 8GB stock NAND. For a $199 on contract device, 16GB really should be the minimum, especially considering a few other WP7 phones, to say nothing of Android phones and the iPhone, all start at $199 with 16GB.
That said, adding the SD card isn't that big a deal as long as you do it before you've filled the device up. For some reason there seems to be no ability to do a full backup of the phone by any means I've been able to find.

The problem with the SD Cards is that there's intense confusion/miscommunication about which cards work well. Just because it works with 6GB doesn't mean anything. What seems to happen is once you get to 8GB filled, the phone's performance takes a nose-dive, sometimes leading to losing all data.

"Enough space" depends on you, not us. I have an iPhone, iPad and iPod, all 16GB units, each with some 14GB or so of music & apps on them so it the first thing I did when I brought the Focus home was slap an 8GB card in there, format it and load it up. I have maybe 2GB free and it's worked without a single glitch for the past two weeks. For reference, mine is a Sandisk class 2. People seem to have problems with cards other than Sandisk and other than class 2 and I noticed absolutely no performance problems so if you're going to try it, try that and keep the receipt in case you need to return or swap it should something go sour.

Enough Space?
I agree with Mark, whether there is enough space or not really depends on what your usage requirements are.
I had a 32GB Zune and when I bought my Samsung Focus the Zune had over 20GB of data on it. So for me adding and 32GB SD card to the Focus was not only a desire but a very strong selling point for the Phone.
And yes, I am seeing a few issues with the Sandisk Card that is in it. Currently they are not enough to make me yank the Card because I (again) bought the device to specifically be a convergence device for myself and I am at heart a tester and tinkerer so figuring how exactly how WP7 works.doesn't work with an SD Card and the statement that MS and Samsung are working on a fix is enough for me right now.
Smaller Sized Cards seem to be more reliable than larger cards (not to mention less expensive) but that appears to anecdotal evidence as well. My 32GB Sandisk only causes freezes and resets when on Battery for example and I've not had anyone else confirm if they are seeing the same.
Not great answers but, hey, this is the fun of learning as we go along...
- MEK

FishFaceMcGee said:
The problem with the SD Cards is that there's intense confusion/miscommunication about which cards work well. Just because it works with 6GB doesn't mean anything. What seems to happen is once you get to 8GB filled, the phone's performance takes a nose-dive, sometimes leading to losing all data.
Click to expand...
Click to collapse
I have more than 11GB on my Focus with no issues at all. No slow-downs, no hiccups, no data loss period. I am currently using a PNY 16GB Class 2 card. I previously had a Centon 8GB Class 6 card with the same results.
If you read the thread on MicroSD cards, it seems there are some cards that have been working pretty much flawlessly. Both of the cards I mentioned have worked perfectly for me. I gave the 8GB to a friend and he is using it in his Focus as well.

For me, to really make a portable phone/audio/video device be best for me it would need at least 150GB of storage... and a few TB if i wanted to listen to music lossless and a few movies.

MKohlman said:
I agree with Mark, whether there is enough space or not really depends on what your usage requirements are.
I had a 32GB Zune and when I bought my Samsung Focus the Zune had over 20GB of data on it. So for me adding and 32GB SD card to the Focus was not only a desire but a very strong selling point for the Phone.
And yes, I am seeing a few issues with the Sandisk Card that is in it. Currently they are not enough to make me yank the Card because I (again) bought the device to specifically be a convergence device for myself and I am at heart a tester and tinkerer so figuring how exactly how WP7 works.doesn't work with an SD Card and the statement that MS and Samsung are working on a fix is enough for me right now.
Smaller Sized Cards seem to be more reliable than larger cards (not to mention less expensive) but that appears to anecdotal evidence as well. My 32GB Sandisk only causes freezes and resets when on Battery for example and I've not had anyone else confirm if they are seeing the same.
Not great answers but, hey, this is the fun of learning as we go along...
- MEK
Click to expand...
Click to collapse
You know, I was thinking about this the other day...the phone has 8GB of internal memory and if you put in an SD card it stripes data across it and the internal memory. If the card is 8GB or smaller that's fine but what happens if the SD card is larger than internal memory? It doesn't stripe the first 8GB and set the rest up as another partition and it does appear to use but it can't be striped. Now you've mentioned that smaller sized cards work better and my 8GB card works perfectly. I wonder if the file system's attempt to work with a larger card is inherently unstable? I know that if you put two different sized drives in a Windows box and stripe across them you will only end up with double the size of the smallest drive, not the actual sum of the two. Might be an interesting poll...indicate the size of your SD card and if the phone has been 100% stable since inserting it.

markgamber said:
You know, I was thinking about this the other day...the phone has 8GB of internal memory and if you put in an SD card it stripes data across it and the internal memory. If the card is 8GB or smaller that's fine but what happens if the SD card is larger than internal memory? It doesn't stripe the first 8GB and set the rest up as another partition and it does appear to use but it can't be striped. Now you've mentioned that smaller sized cards work better and my 8GB card works perfectly. I wonder if the file system's attempt to work with a larger card is inherently unstable? I know that if you put two different sized drives in a Windows box and stripe across them you will only end up with double the size of the smallest drive, not the actual sum of the two. Might be an interesting poll...indicate the size of your SD card and if the phone has been 100% stable since inserting it.
Click to expand...
Click to collapse
I'm not totally convinced based on comments in blogs that the disks are "striped". I think a lot of people are saying this and maybe using the term out of context and everyone just keeps using it. Has Microsoft actually come out to say "WP7 performs RAID 0 configuration"? For a phone OS which was never intended to see anything other than a single drive, don't you think throwing a RAID controller in there just for kicks is a little absurd?
The other term is "span" and if I had money, I'd bet that the two disks were spanned as a single partition, as opposed to striping like RAID 0 does.
Despite all of that, I have tried a 16gb class 4 with more issues than I cared for and currently have an 8gb class 4 with negligible issues. Any card you get, I'd run on Vista/Windows 7 and test for ReadyBoost. That at least tests the card for random access speed, which is important. My 16gb failed readyboost and had lots of issues in my Focus, whereas the 8gb passed and the only issues I've seen with that one are issues that other people might have experienced on their own phones sans sd card.

hyperzulu said:
I'm not totally convinced based on comments in blogs that the disks are "striped". I think a lot of people are saying this and maybe using the term out of context and everyone just keeps using it. Has Microsoft actually come out to say "WP7 performs RAID 0 configuration"? For a phone OS which was never intended to see anything other than a single drive, don't you think throwing a RAID controller in there just for kicks is a little absurd?
The other term is "span" and if I had money, I'd bet that the two disks were spanned as a single partition, as opposed to striping like RAID 0 does.
Despite all of that, I have tried a 16gb class 4 with more issues than I cared for and currently have an 8gb class 4 with negligible issues. Any card you get, I'd run on Vista/Windows 7 and test for ReadyBoost. That at least tests the card for random access speed, which is important. My 16gb failed readyboost and had lots of issues in my Focus, whereas the 8gb passed and the only issues I've seen with that one are issues that other people might have experienced on their own phones sans sd card.
Click to expand...
Click to collapse
I've read both, striped and spanned...who knows. Considering how slow SD memory always was in old WinMo devices, I didn't think it absurd to stripe data to provide the same kind of speed boost you get when striping hard drives. Hard as it might be to believe, it may have just been that WinMo was slow. I hadn't thought of the readyboost test, that's a good idea. Readyboost is pretty picky.

Just got a 16GB Micro CLASS 10

Hey guys. I just got my new Micro SDHC 16GB Class 10 card. Yes class 10.
I copied everything from my stock HD2 16GB SD, Everything. Right into my new Wintec 16GB Micro C10. and then reboot to Android. Everything seems to be running smooth and fine. But I do have one weird issue. Sometimes it takes a little while to wake up from standby. When I hit the Wake button the key lights turn on, but screen wont. Most of the time it wakes right up, but sometimes it doesn't. Others I'll hit it and the screen stays black and if I touch the screen then it wakes up and I can slide to unlock.
Wasn't like this before. Is this the card going to sleep, or is something not right? or Does anyone have any thoughts or suggestions. I'm thinking I might format the card in Android (so it's properly formated) and then recopy everything over.

The only thing that's ever done this for me is SetCPU profiles, I've been on the stock 16gb that came with my HD2 and it wakes up just fine with the right SetCPU profile.
What kernel and which scaling are you using? It might be interacting with the SD card a little differently. Have you run Quadrant? although quadrant scores are usually meaningless you can use them for some information. Your I/O score should be a lot higher on the new card if it is actually faster. I have heard of name-brand class 2 significantly outperforming generic/cheap class 6 cards.

I've said this many times, my stock class 2 outperforms my class 4 8gig by a mile. With the class 4, I often can't get it to work properly at all. I having clue why this is though, and nobody seems to have an explanation. Sorry man, just the way things are.
Sent from my HTC HD2 using XDA App

Well, I didn't buy a no name card. Wintec is not a no name brand. They've been around longer than A-Data, Transcend, Patriot. All of those. lol but I see your point.
I'll run Quad n see, but things seem to have improved a little bit after my 3rd reboot. but sometimes it still does it. I'm using smartass governor on SetCPU

If you didn't change anything, then it sure as well be your SD card. If you really want to make sure it's your card, start the entire android build from scratch and see if you still get that same result. if not, then there you go. If yes, then its the card (Assuming everything worked perfectly before you made the copy/paste from your old card to your new one).

Class is not everything. High class only mean high write and read speed to large block transfter, but android need a lot of small block transfter.
You can use ATTO to test your SD's speed. you can find Sandisk's TF will be 10 times faster than Kingstone for small block. but they maybe the same speed for large block.
You can try to buy one Sandisk's mobile ultra micro-sd, it's best SD to run android.