Develop Bugs

[Q] Could my video recording be laggy becouse of my SD card?

Hy, i have a routed desire running auras 7.6.1 (i think, anyway the latest of his roms) and a kingston class 6 microsd. I have testet the sd on my laptop right after i got it and it could sustain a rate of 7mb/s write and around 10 to read. Now i formated it twice, reinstaled rom and record at 800x600 even if i choose mp4 or h.264 i get an anoying 1 sec frreeze at each 20-30 sec of recording...i mean recording never stops....i can see that freeze only at playback. I tought its the player so i have copyed the movie to pc and i still get the same freeze on pc too, so im thinking its a writing problem on sd card or something...
Ps if i plug my phone to pc and use it as mass storage device and upload a file to phone i only get a sustained speed of 1,5-2mb/s is that ok or is it rly somthing wrong with my card as i suspect...
Excuse my poor english and typing mistakes i send it from my desire thanks.

There seems to be a problem with SD card speeds in Froyo / Sense ROMs. You could try a non-Sense ROM, e.g. CyanogenMod 6, Defrost or OpenDesire - I had similar problems to you and got around them by switching to CM6. If you decide to try another ROM it might be worth using the "SD Card Speed Test" app from Market to benchmark before and after you change ROM.
Let me know how you get on...

Hy, i have tested the sd card with that aplication, i get 2mb write and 4mb read. I have instaled cyanogen and another rom without sense, speed went from 2mb write to 3mb write and that was all...i have tryed it without an ext3 partition also and speed was the same... so i went back to sense rom... since the speed improvement its not much. Maybe someone can recomend me an sd card wich works at greater speeds with a rooted desire, and maybe a place where i can buy it from UE thanks.

that's strange. I have a class 4 Kingston 16GB card and I get 6mb write and 5mb read!
Phil

littlej said:
Hy, i have tested the sd card with that aplication, i get 2mb write and 4mb read. I have instaled cyanogen and another rom without sense, speed went from 2mb write to 3mb write and that was all...i have tryed it without an ext3 partition also and speed was the same... so i went back to sense rom... since the speed improvement its not much. Maybe someone can recomend me an sd card wich works at greater speeds with a rooted desire, and maybe a place where i can buy it from UE thanks.
Click to expand...
Click to collapse
You said earlier that you have a class 6 SD card, so you should be getting at least 6MB/s. Do you have something other than your phone that you can test your SD card in, for example a card reader? That would help you to work out whether the problem is with your SD card or the phone.

if u can recomend me a software to test it in windows 7 x64 i can test it in my laptop

Hy, well problem is solved for me. I have tested the card in laptop and i was geting a 2mb/s write and sometimes jumped at 3-4mb/s max. So i sent it back, and got an A-data 8gb class 6. I pluged it straight into phone, recorded a video and worked flawless, i installed android sd card speed test and i got a write of 6mb/s and 7mb/s read. Afther that i did an ext3 partition on it, and got same write and read speed, so problem was the SD card. Thanks.

[Q] Very Slow

When I do install any Android Flavor (warm donut, incubus froyo, cyanogen, etc) in NAND / SD (sys on NAND and data on SD card (data.img or ext2 partition)), the system becomes very very slown ... even to unlock screen, the mostly of time, the screen turns off before I get unlocked..
When I install only in NAND (sys and data) everything is ok, and very fast.
In Cyanogen, I have option in setup, to install apps in SD (even if sys and data are in NAND.)
Anyone have similar problema with speed in SD install ?

Ducamau said:
When I do install any Android Flavor (warm donut, incubus froyo, cyanogen, etc) in NAND / SD (sys on NAND and data on SD card (data.img or ext2 partition)), the system becomes very very slown ... even to unlock screen, the mostly of time, the screen turns off before I get unlocked..
When I install only in NAND (sys and data) everything is ok, and very fast.
In Cyanogen, I have option in setup, to install apps in SD (even if sys and data are in NAND.)
Anyone have similar problema with speed in SD install ?
Click to expand...
Click to collapse
What's the class of your sdcard? A class 4 or class 6 sdcard should have performance close to or similar to NAND.

mychiu said:
What's the class of your sdcard? A class 4 or class 6 sdcard should have performance close to or similar to NAND.
Click to expand...
Click to collapse
Hum..
I really don't know, but I presume it is class 2 (microSD 1Gb became with TyTN II)

under 4 gigs their isnt a class system because its not SDHC as far as i know, but performance will be sluggish with data on the SD since the system has to constantly pull to the SD its just the nature of having Data on SD

thoughtlesskyle said:
under 4 gigs their isnt a class system because its not SDHC as far as i know, but performance will be sluggish with data on the SD since the system has to constantly pull to the SD its just the nature of having Data on SD
Click to expand...
Click to collapse
Oh.. I see..
my microSD 8Gb does not write anymore.. I can read files in it.. but I cant delete or write new files..
Peraphs I burn it (with a cold reset or any thing about it)

Ducamau said:
Oh.. I see..
my microSD 8Gb does not write anymore.. I can read files in it.. but I cant delete or write new files..
Peraphs I burn it (with a cold reset or any thing about it)
Click to expand...
Click to collapse
it will still be dependant on the speed of the card, might want to do some speed test on your pc to see how fast it is. I don't have valid speeds on me but you can prob google to see what class 4 and 6 tests would return. I run everything on SD and don't have any issues.

ghghgh14702 said:
it will still be dependant on the speed of the card, might want to do some speed test on your pc to see how fast it is. I don't have valid speeds on me but you can prob google to see what class 4 and 6 tests would return. I run everything on SD and don't have any issues.
Click to expand...
Click to collapse
I tryinstall Warbyte Donut, with sys on NAND e data on ext2 partition...and everyting is fine.. even with 1gb microSD (nonSDHC)... veryf ast and stable.. (at last 24hs)...
very fast.. and only issue is wifi sifnal (too weak sometimes).. and now (at this exatcly moment, the market begins force close when i press INSTALL in any app.

[Q] My Desire lags terribly after switching from class 2 to class 10

Hello,
I have bought a Kingston MicroSD 16gb Class 10 card from eBay, although I was a bit concerned(because its eBay), I have received the card and tested it with H2testw v1.4.
The results:
Warning: Only 15475 of 15476 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.6 MByte/s
Reading speed: 18.4 MByte/s
H2testw v1.4
Ive been using Starburst Lite + data2sd rom, and when I got the new card I have reinstalled the rom just like I have installed it the first time (partitioned the sd card with fat32 and less than 2gb to ext4).
Now, the phone keeps lagging, and everything is slower, and I have no idea why.
The weird thing is, when I tried to play Modern Combat 2, it was way faster than with the class 2 card.
I have tried testing the card through the phone with Sdt (SD Card Tester) and it says the card has a write speed of about 2-3mb/s.
I have not tested read speed.
Why am I expriencing this? is it because the way I have reinstalled the rom? is it because the card is fake(even though the program I used to check the card said it was alright)? is it because the facebook sync/google sync?

You phone might lag during the first hours after installing a new ROM, I've had this too.

I had a similar problem with a Patriot class 10 card. I changed to an A-DATA class 6 and have had no problems at all using the StarBurst Main rom. My class 10 card in the phone suffered horrible write speeds, but amazing read speeds (no good for data2sd). The class 6 is WAY better.

ooie: I have installed the rom on the new sdcard last night at 19:30pm, and now its 10:17am.
OpusX11: It's a kingston branded card, and they're considered to be quite good as far as I know.
Also, I have tested the card with my pc, and it had better write + read speeds.

many issues have been reported already with class 10 cards and data2sd coexisting u can check here. i have a class 10 kingmax and have no problems though. since u're using sibere's data2sd (Starburst ROM) did u align to MiB when u created ur partitions, have u done the optimization trick mentioned in the data2sd OP?
Edit: i don't see why u reinstalled the ROM , wouldn't just partitioning the new card do the trick ?

rayiskon said:
many issues have been reported already with class 10 cards and data2sd coexisting u can check here. i have a class 10 kingmax and have no problems though. since u're using sibere's data2sd (Starburst ROM) did u align to MiB when u created ur partitions, have u done the optimization trick mentioned in the data2sd OP?
Edit: i don't see why u reinstalled the ROM , wouldn't just partitioning the new card do the trick ?
Click to expand...
Click to collapse
To be honest, I have no idea whats MiB or the other link you're talking about.
I have installed the rom the same way I have installed it on my other card, the class 2 sandisk, which worked quite fast.
I have reinstalled the rom because i'm new to android and I wasn't sure if I had to install it or not so I just did it all again.

hfg666 said:
To be honest, I have no idea whats MiB or the other link you're talking about.
I have installed the rom the same way I have installed it on my other card, the class 2 sandisk, which worked quite fast.
I have reinstalled the rom because i'm new to android and I wasn't sure if I had to install it or not so I just did it all again.
Click to expand...
Click to collapse
if u partitioned ur microsd with Gparted there is an option "align to MiB" (MiB= mb)
the optimization link is from the data2sd thread
this is a line from starburst thread "Data2Sd Re-Installer
If you ever reflash the Rom alone after the Data2SD is installed, some essential libraries required by Data2SD is lost. To restore them, flash the Rom in Recovery, followed immediately thereafter by the Re-Installer.
so go to the thread and download the data2sd REinstaller, flash ROM and then flash the reinstaller without leaving recovery, then reboot and see what happens.

I agree that Kingston normally is a very good brand, i use their RAM quite a bit, but when it comes to microSDHC, not so sure. Search this site for Kingston problem and you'll see the threads I was referring to.

Ok, so i checked my partioning and it seemed like i checked the align to MB thing.
Ive reinstalled the rom, and then Ive installed the Data2SD REinstaller, made a reboot and the phone just freezed at the green htc logo screen.
So ive installed it the way i did the first time and it works again, but slow.
Perhaps its the card? Or the Desire compatibility with the card?
I thought my phone would become super fast, but now it operates even slower :-\

I´ve flashed RCMixHD Data2ext with a Kingston 16 GB class 10 Card.
First hours the ROM feels very laggy, after "sattle down", it runs fast and smooth.

Well I've tried to wait one day but it was still laggy..
It says made in taiwan on my card, where was your card made?

mine is from china

I havent found a solution yet.. i have tried to reinstall starburst a few times, and tried to installed the standard edition instead of the lite edition, and its really slow and frustrating..

seems to be pot luck with sd cardsand desire , i had troubles with my first class 1016gb card but switched to a-data class 10 after recommendations from other users and havent looked back , top stuff

tonnytech said:
seems to be pot luck with sd cardsand desire , i had troubles with my first class 1016gb card but switched to a-data class 10 after recommendations from other users and havent looked back , top stuff
Click to expand...
Click to collapse
You had the class 10 kingston too?
I am beginning to think its the sd card, after I read that its not just about the class but also about the random write speed

[Q] Slow USB speed?

Hi All,
I am running teppic74's rooted, A2SD+ but otherwise stock HTC/Sense/Froyo ROm.
I have a Lexmark, 16GB Class 6 SD card. It came from a reputable source, and I've tested it thoroughly on my PC and it really does perform above and beyond class 6 (ie, 6MB/s sustained write).
However, when I have my desire connected to my PC over USB, and copy files to the SD card, I sustain about 0.75 MB/s
I don't know why it's so slow.
Does anyone else have this problem?
thanks
Slip

Please use the forum search next time, what you describe is a well-known bug seen on latest kernels.

Strange. Have you compared USB transfer speeds on different ROMs?
I have a class 2 sd card that does maintain a decent 2MB/s transfer.
GingerVillian and Miui Roms tested.
I read somewhere that using A2SD/+, D2EXT/W etc does cause sd card to read/write slower over time.

This is it, i've nothing to compare against. I've been through several roms recently and i didn't bother syncing multiple gigabytes of music (keep repartitioning my sd card) until the last couple of days.
Reluctant to switch roms again do to the hassle of installing all my apps etc.
Changing the SD readahead speed makes no difference. "SD Tools" from the market measures write speed at a pretty constant 4 MB/s - but still i can only write over USB at less that 1 MB/s. Makes me think that the problem is with USB rather than SD.

Initial testing in Windows
I have done some testing with this and I really think this is a bug or something that NEEDS to be fixed.
I have a 8GB SDHC Card. It's A class 4 card, meaning transfer speeds should never be lower than 4 MB/s.
When I put my SD Card in my SD slot of my computer using the little adapter that came with it, the transfer speeds are awesome. Now they were as follows:
Read: 6,4 MB/s
Write: 1,1 MB/s
These values are atrocious so I searched for possible reasons. I found out Windows Vista used a very low cluster size when formatting the SD card, it used 1024KB (I think). After manually choosing to format using 64 KB clusters and testing again, this is what I got:
Read: 19 MB/s
Write: 9,2 MB/s
Explaining Cluster Sizes
Now making the cluster size this big has a disadvantage. The size of every file on the card will be rounded up to the nearest 64kb. This is because of the way the SD cards works, which I'm not going to explain here.
This means that a lot of space will be wasted. Read about it in the link to Wikipedia. In short:
Large cluster size ->Less usable space, faster transfer rates.
Now I put my cluster size at 16 KB as a compromise between storage loss and speed gain, resulting in these speeds:
Read: 17 MB/s
Write: 8,9 MB/s
Testing in Android
I put my SD Card back into my Android phone, and plugged in the USB Cable. I copied some files to the SD Card. Guess what:
Read (Max, not average): 2 MB/s
Write (Max, not average): 1,44 MB/s
Which does not make any sense at all. I used the "SD Speed Increase" app to change the cluster size within Android (which is 128kb by default) and it still did not help.
This is a serious issue in my opinion, I lost some data and want to restore a backup, If I leave my SD card in my phone it would take 23 hours according to Windows! If I put my SD Card in the computer, the same task only takes 12 minutes!
Workaround
While searching around on XDA I found a workaround to this problem. This is by no means a real fix, but it enables you to get proper read and write speeds without the need to take the SD Card (and thus the battery on some devices) out. Reboot your phone in recovery. I have CWM-AlphaRev Recovery, but it should work for other recoveries too.
In AlphaRev recovery, go to
"mounst and storage"
"mount USB Storage"
The phone will be connected to the PC, and what do you know?
Read: 17MB/s
Write: 8,7 MB/s
Which is basically the same as I would get if I wouldn't have used the phone at all!
Sources:
SD Speed Increase:
https://market.android.com/details?id=com.sdincrease.it&feature=search_result
Measure SD speed from within Android:
https://market.android.com/details?id=ales.veluscek.sdtools&feature=search_result
Information on cluster size:
http://en.wikipedia.org/wiki/Data_cluster
SD Card Class rating:
http://en.wikipedia.org/wiki/Secure_Digital#Speed_Class_Rating
Reboot into recovery for proper speeds:
http://forum.xda-developers.com/showpost.php?p=11671350&postcount=2

just flash a different kernel

Tried many many kernels, not one really helped unfortunately

Being reminded about this issue yesterday evening while copying over a bunch of music, I went for a search again, and stumbled across this post:
http://forum.cyanogenmod.com/topic/15003-ultra-slow-usb-transfer-speed-on-desire/ which lead me to this post: http://forum.xda-developers.com/showthread.php?t=883598
The problem came with the .37 kernel, but wasn't fixed in the .38 kernel apparently. The Manu kernels are based on .35, so from what I've read it will solve the slow write speed. Since I'm at work atm, I can't write to USB (security policy ), so couldn't test it yet.

Right, using the Manu kernel (havs-axi), I can now transfer data (music...) at 1,6MB/s instead of 0,75MB/s. Not a significant increase, but at least an increase I can live with.

[Q] SD Transfer Rate Slow

Im copying 2 movies to my phone at a total of 2.18 GB and its taking 45minutes to copy. My phone says that SD Card has a write speed of 5.1 and a read speed of 12 but the movies are copying at 979kb/sec. I flashed Cal's SD fix and its still slow. What could the problem be?
CM7 w/ S-Z kernel.

GB AOSP Kernels have slow transfer speeds right now. DL mulit-mount sd from the market, or go into recovery and toggle usb and transfer there.

jstalford said:
GB AOSP Kernels have slow transfer speeds right now. DL mulit-mount sd from the market, or go into recovery and toggle usb and transfer there.
Click to expand...
Click to collapse
Thanks alot

No problem.

Yeah I freaked out when I first noticed that transfer rates with CM7 were HORRIBLY slow. I thought there was a problem with either the phone or my USB drives.
Does that multi-mount sd card app work with aosp roms to speed up transfer rates?

Yeah, that's why I recommended it.

There's also dual mount sd, which does the same thing; I also recommend it.

Thanks as well Te. I purchased multi mount. Im happy with it.
Sent from my......ummm...let me get back at'chya!