Do class 10 sdcards is better than class 2 sdcards for running wm7 on hd2?
It would be interesting to know what the fast card is or if there is ant difference, my 4GB class 4, can become laggy at times.
In my experience with 4 different MicroSD cards class does not matter at least with Android. More accuratly Class is not a good indicator of how well the card performs he way it is used in the phone. My worst performing MicroSD card is a class 4 PNY. My best performing card is the 16gb class 2 that came with the phone. I have another Class 6 and Class 2 that are somewhere in the middle. This is based upon my own personal testing using load times of various android builds. My Class 4 is almost unusable compared to the other two, it's super laggy when it's accessed.
It's the random access speed that makes a difference in wp7... and class has nothing to do with that. Actually I read that higher class cards can have worse random access speed because the card makers use special tweaks to get high write speeds which cause random access to lower. You will probably definitely have better luck with name brand. Most sandisk class 2 seem to work well.
It's the same with running android from sd, I think. The random access time would be the most important when accessing many small bits of info from different parts of the card like running as os would do. Thats probably why people always had better luck running android from lower class cards. Some benchmarking apps can get a cards random access speed.
following this thread,,im using the 16gb class2 card.. wp7 is laggy and annoying..
other than that,,its good
My phone is running fine with 16GB class 2 sdcard except some random reboots. Yesterday, it happened 3-4 times, today not at all
Related
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...
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.
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.
I ordered a ADATA 8GB MicroSDHC Class 10 memory card for my HTC HD2. I'd like to know if it will work well on my phone since the transfer is so high. I'm asking this because I want to use a SD version on android.
Thank you in advance for the answer!
When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.
GLO said:
When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.
Click to expand...
Click to collapse
I found a really old thread where people were saying it is fully supported. Thanks for the answer! I want to use android on the sd too because I don't really want to risk messing up my phone with a rom install.
It's been around for ages that the speed of the SD doesn't matter for SD android.
what matters is the access time, here's a thread for benchmarks:
http://forum.xda-developers.com/showthread.php?t=1048649
the smaller the access time the better. in other words, you might get a class 10 card with long access time, and a class 2 with short access time, the class 2 will perform better overall (faster system loading, etc). but when you copy large files the class 10 will be faster.
meaning: for running android on SD you need a faster access time, and each millisecond counts.
[edit] forgot to say that random read and write speeds play a good role as well.
I use PNY 32GB class 10 MicroSD card in my HD2. No problem at all. Phone is only one week old and haven't installed any cooked ROM yet so 32GB card on stock ROM.
yes, a class 10 would work perfect with stock or custom windows ROMs. and with NAND android to some point.
I'm talking about SD android which, in case you haven't read the previous posts, he wants to run a build on his SD. and that's where the class 10 cards start to look bad. they mostly have slower random read/write speeds. In usage terms that's: lags, lags, errors, and more lags.
Hi I noticed in the recent wp7 roms that is is recommended to have atleast
class 6 sd card. Why has this increased? The last 6 months I have been using a 16gb class 2 & and my wp7 roms have been working fine. The last rom I used was pdaimate v1 and it ran flawlessly. Now I invested in a 32gb class 4 card & was hoping to install the latest pdaimate roms with multi fix. Question is how will my new card fare in performance compared to a class 6?
Marcus2283 said:
Hi I noticed in the recent wp7 roms that is is recommended to have atleast
class 6 sd card. Why has this increased? The last 6 months I have been using a 16gb class 2 & and my wp7 roms have been working fine. The last rom I used was pdaimate v1 and it ran flawlessly. Now I invested in a 32gb class 4 card & was hoping to install the latest pdaimate roms with multi fix. Question is how will my new card fare in performance compared to a class 6?
Click to expand...
Click to collapse
Its still random access speeds that are important, people saying class 6 is probably just what they have working, but its a provable fact cards with a slower random R/W, cards do not work, tied to that, many (but not all!) Class 6+ cards use a type of prefetching to speed up their sequential speeds, that can slow down random speeds, so sometimes ( but not always!) less than class 6 is better.
Agreed! I have 2 cards performing very different... 1. is a 8 gig Nokia OEM card class 4 - takes VERY long to install apps and watching videoes on youtube and such requires me to wait for the whole video to load as there will be lag otherwise. My other card is a 16 gig Sandisk class 2 - Time for installing apps is acceptable and watching videos on youtube is smooth BUT the batterylife is a lot worse than on my other card!
As you can se class can't tell you how a certain card will perform! Logic would say that the card with the higher class should load faster but on the other hand have poor batterylife - wrong in my case!
So what is the solution you might ask? Trial and error my friend - trial and error That's as simple as I can put it.
/Anders
Well after loong night of installing wp7 and 4 android builds on my new 32gb class 4 card, everything went smoothly. All builds fly but unfortunatly bad battery life remains..