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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...
Hey I know that the main problem with the Evo camcorder is in how it is encoded and the main restriction holding back the quality is the speed of the sd card. I would like some feedback for those of you who upgraded their sd cards on whether it has had an impact on video recording.
Thanks
currently I have the stock sd card, but I'm considering upgrading if there is a significant difference in video quality
no increase on mine
cl6 16gb
drew16 said:
Hey I know that the main problem with the Evo camcorder is in how it is encoded and the main restriction holding back the quality is the speed of the sd card. I would like some feedback for those of you who upgraded their sd cards on whether it has had an impact on video recording.
Thanks
currently I have the stock sd card, but I'm considering upgrading if there is a significant difference in video quality
Click to expand...
Click to collapse
I've had two memory cards besides the factory 8GB. One was a Sandisk 16GB Class 2 and the other is a Lexar 32GB Class 10. Video recording on the class 2 cards while panning at a good clip introduces artifacts into each captured frame, and the fps drops considerably. However, with the class 10 card, both of those are reduced significantly. The artifacts are virtually non-existant and the fps slow down only happens when moving the camera really fast.
I would definitely look into getting a class ten. Two cards that people are going with are the Wintec 32GB (avoid the 16GB) and the Lexar 32GB. Check out www.provantage.com for the Lexar card and www.newegg.com for the Wintec one.
I'm using a class 10 16gb, After looking through my videos, I would say there is a small improvement in quality. Mainly in the old videos I noticed every once in a while it would get pixelated, the new ones don't and theres less of a grainy look. One MAJOR thing I want to point out is on the old 8gb class 2 I was using a sense camera now I'm using the asop one in CM7.
I would just go spend the $30 and get a better card, it'll make your life better in every way!
anyone know what the threshold is for sd card classes regarding quality? in other words, besides faster data transfer speeds to another device what is the lowest class # needed to see improvement before its overkill?
TBoner101 said:
anyone know what the threshold is for sd card classes regarding quality? in other words, besides faster data transfer speeds to another device what is the lowest class # needed to see improvement before its overkill?
Click to expand...
Click to collapse
Seems class 10 works well. If I get time at some point I'll try to do a test with similar lighting and such. I have class 2,4(?)6, and 10.
Also one point I want to make is I got my 16gb class 10 on newegg for $30(wintec, it has horrible reviews but mine works fine), but theres a ton of others and check out the accessories forum a lot of times people will post up when they find a deal.
If you just want more speed theres lots of 8gb class 6 for under $15. Micro Sd cards have dropped a whole lot in a short time
Drewmungus said:
Seems class 10 works well. If I get time at some point I'll try to do a test with similar lighting and such. I have class 2,4(?)6, and 10.
Also one point I want to make is I got my 16gb class 10 on newegg for $30(wintec, it has horrible reviews but mine works fine), but theres a ton of others and check out the accessories forum a lot of times people will post up when they find a deal.
If you just want more speed theres lots of 8gb class 6 for under $15. Micro Sd cards have dropped a whole lot in a short time
Click to expand...
Click to collapse
i dont care too much for faster data/file transfers to & from a computer as id rather spend the extra money for more storage than on a class 10 when a class 6 improves video recording just as well.
on the other hand, if apps or videos that are installed onto an external class 10 sd perform better than class 6, than itd be worth the upgrade, but im not sure if the phones processing power is the limiting factor or the weakest link, if that makes sense.
any one else care to share their thoughts of say a class 6 vs a class 10. I still have the stock class 2 in both my evos and video quality is very unreliable.
Thanks
Hello to all Streak owners
I've just bought a Streak that requires a new screen, and whilst replacing that I will be looking into replacing / upgrading the 2gb internal Micro SD card.
Now I've read some threads on here and believe you have to set it up correctly as it only recognises 2gb at a time, but thats not my query now, I'll find the info and if not then I'll post for help.
Q)
My question is with Micro SD cards getting ever cheaper, and faster, higher performance ones dropping also in price, is it worth going in for these faster, higher performance cards???
Either for general Micro SD storage or internal storage, replacing the 2gb.
I know it seems common sense, by putting a faster or higher performance card in, should make it faster. But...
???)
Can the Streak make full use of the higher performance, faster cards?
When do you reach the point of overkill, or diminishing returns?
Can the streak support higher speed technology? (I believe I read somewhere that in fact the lower class cards were faster, although I don't understand this) If this is correct, someone please explain...
Ideally I'd like to know what is the fastest card the Streak can make use of? And what Micro SD technologies it can support?
Also if anyone has real world speeds for cards, (as I understand, often the numbers, classes manufacturers quote often mean nothing, compared to how they actually perform) or preferred manufacturers they could recommend, or links to tests, benchmarks, reviews etc.
Many, Many, Many thanks to this site and all its contributors,
I've used this site for many years, back when I had an XDA II from O2, lost / forgot that username, then again when got MDA Tmobile, AKA (Blueangel), but I don't post much as usually I'm able to find what I want, buy searching on the site or by xyz or whatever I want site:xda-developers.com in a popular search engine.
Best wishes and Seasons Greetings to you all,
John
Keep this in mind: at a certian point even if the card is compatable, the controller on the device itself will eventually be the bottleneck. Would this be the case? I have no idea, but adding in a faster card then the stock one has shown benefits.
Every ROM above 2.3.7. is to much for the HD2 leo, I´ve tried many 4 and 4.1 roms (both NAND ans NativeSD) but none of them runs smooth enough.
Scrolling through the homescreens. which is what you see in the most tuorials op YT, is NO guarantee for a smooth working rom.
I´ts strange that I reed so little about this here, only positive experiences....
Maybe there is something wrong with your setup if there are so many positive experiences?
I use a Cyanogen jelly beam ROM daily. Its smooth as it can be and totally reliable. Everything works. All my apps and GPS.
Sent from my HD2 using the power of Jelly Bean
in-call volume for outgoing calls is too loud in every rom beyond GB. That's why it's unusable for me, not the speed or smoothness
but there are many good ics roms !!!! for example the evohd2!!!
7325 said:
but there are many good ics roms !!!! for example the evohd2!!!
Click to expand...
Click to collapse
What could I possebly do wrong then........
Hmmm, found out that my class 10 microSD is a B-brand and not as fast as I thought it would be!
I'm gonna try it again this week and buy a good one.
Genuine Sandisk class 4 or 6 are good for me. No need class 10, it won't help.
There many write-ups here but basically get a good brand name
Sent from my HD2 using the power of Jelly Bean
the hd2 doesn't support class 10. only class 6,4 and 2
hammar63 said:
Hmmm, found out that my class 10 microSD is a B-brand and not as fast as I thought it would be!
I'm gonna try it again this week and buy a good one.
Click to expand...
Click to collapse
Like many already noted - a good brand is more important than a high Class number.
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With proper diet, rest, and exercise a healthy body will last you a lifetime... (via Tapatalk)
7325 said:
the hd2 doesn't support class 10
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Click to collapse
Yes it does, it's because class ten cards tends to be engineered for large contiguous read/write, (images,video,audio) but many are shockingly slow at small file random read write, which seems to be what native SD relies on most.
In general, a class six will have a better 4k readwrite than a class ten, but it's not as simple as "class six is better", because there are good class tens, you just have to research them.
(same for class four cards,there are some with adequate random rw torun native SD)
samsamuel said:
Yes it does, it's because class ten cards tends to be engineered for large contiguous read/write, (images,video,audio) but many are shockingly slow at small file random read write, which seems to be what native SD relies on most.
In general, a class six will have a better 4k readwrite than a class ten, but it's not as simple as "class six is better", because there are good class tens, you just have to research them.
(same for class four cards,there are some with adequate random rw torun native SD)
Click to expand...
Click to collapse
yes you're right. i mean the hd2 doesn't support the full speed from a class 10 sd card. but he does recongnize the sd card!!!
ps.: a class 10 sd card has a higher read and write speed than a class 6!!!! but older devices (like hd2) support the full speed from a class 6 sd card
7325 said:
ps.: a class 10 sd card has a higher read and write speed than a class 6!!!!
Click to expand...
Click to collapse
You're missing the point, it's nothing to do with the Max speed of the card, or even whether the phone steps it down to a lower class,, it's all about the random read write speed of small blocks, and if you run benchmarks ( or read some benchmark threads) you'll see that most cards, nomatter what class, will only achieve less than 0.1 m/sec at 4k block size. I've seen lots of lists of results for various cards, and loads of cards get way less than 0.1, some as low as 0.01 Megpersecond.
samsamuel said:
You're missing the point, it's nothing to do with the Max speed of the card, or even whether the phone steps it down to a lower class,, it's all about the random read write speed of small blocks, and if you run benchmarks ( or read some benchmark threads) you'll see that most cards, nomatter what class, will only achieve less than 0.1 m/sec at 4k block size. I've seen lots of lists of results for various cards, and loads of cards get way less than 0.1, some as low as 0.01 Megpersecond.
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Click to collapse
Finally someone got it! :thumbup:
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Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend. (via Tapatalk)
I) Change the SD card.
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Although Dell's stupid camcorder settings probably should not overload the class 4 card that comes with the phone for the most part, a 720p video I recorded using my Class 10 card has a bitrate of roughly 6MB/S, which is higher than the 4mb/s a class 4 card is supposed to be able to transfer. I changed to a 32GB Sandisk Mobile Ultra Class 10 and there is a noticeable difference in the smoothness of the video recorded. Some lag is still present(In reality the phone records at 23 fps as opposed to the 25fps Dell says it should), but for the most part the video is now acceptable. Maybe a placebo effect, but photos seem to be captured slightly faster.
II)Settings in the Camera.
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This makes a HUGE difference in the viewfinder, where it's silky smooth one second and laggy as hell the next. Turn auto-banding on,change the scene mode to sports or something,and if you want change the white balance from automatic to something else.
More tips to be added as I discover them
Great tips! Especially your second point.
Thanks for the info!
Theres a lot of discrepancy as far as choosing the class of memory card for the dvp. Some users say stick with class 4 because its more likely to be accepted with the dvp, some say get class 6 or class 10 due to higher speed. However, is getting a higher class card riskier? I have read online that the phone may get bricked if you use an incompatible card and it is safer to use a class 4... is this true or is getting a class 10 card okay?
My personal experience is that there is no problem with a SANDISK card.(maybe other popular brands too, but Sandisk announced something about Windows phone compatibility, and the stock card is Sandisk too, so it's the best bet)Maybe if you use some cheap-ass no brand card then it won't get recognized, but I don't think you'd entrust your phone and all your valuable information on those. Seriously, get the class 10, it makes a lot of difference in performance and usability.
I got a Transcend working
yeungl said:
I got a Transcend working
Click to expand...
Click to collapse
Transcend isn't a "cheap-ass no brand card" but thanks for the info. The thanks button doesn't work for some reason...
SunnyChrono6 said:
Transcend isn't a "cheap-ass no brand card" but thanks for the info. The thanks button doesn't work for some reason...
Click to expand...
Click to collapse
Who said it is a cheap-ass no brand card?
The good thing is, it has life time warranty