Develop Bugs

Regarding Micro SD card

Hello...
I have a SanDisk 4GB class 4 micro SD card that came with HTC desire. I installed one of those ROMs that support Data2SD, and it was fast without lagging (actually, super fast).
I bought a Kingston 8GB class 4 micro SD card to replace it with the SanDisk, and installed the same ROM, but I noticed an annoying lag during the normal use, as an example, just after booting to the home screen, when I enter Settings, it lags for like 5 seconds (that NEVER happened in the SanDisk 4GB card). It also lags on different application such as when launching the web browser (a pause for 7 seconds, and again, that didn't happen with SanDisk).
I bought another card, this time Imation 8GB class 4, but it gave me the same results as the Kingston!!
I did a test on the three cards using H2TESTW, the results are as follows:
SanDisk 4GB Class4 --> Write: 4.5 MB/s Read: 11.3 MB/s
Kingston 8GB Class4 --> Write: 4.4 MB/s Read: 18.3 MB/s
Imation 8GB Class4 --> Write: 4.5 MB/s Read: 18.5 MB/s
They all share the same speed in writing, but the Kingston and Imation are faster in reading! which confused me! They both have faster reading speed than the SanDisk BUT lag annoyingly during the normal use!
To be very clear, I tried the Imation card with a ROM supporting App2SD not Data2SD, and it ran smoothly with no lags, but once Data2SD is there, it starts lagging! (I know that Data2SD ROMs are slower than App2SD, but I swear, the Data2SD on SanDisk is FASTER than App2SD on Kingston or Imation).
One more thing, I tried various partitioning for the 8GB cards, with and without swap (swap was always 32M) but with no luck to improve the performance.
If anyone has a logical explanation for this case please let me know, and if there is a certain fix for that (I don't know if increasing the swap size for the 8GB due to their higher capacity would help) please share it here.
Thank you.

Are you by any chance using starburst? Try the newer xe and we scripts on the beta section.they should eliminate lags for slower cards
Swyped with my Starburst based Desire. Forgive any typos!

droidzone said:
Are you by any chance using starburst? Try the newer xe and we scripts on the beta section.they should eliminate lags for slower cards
Swyped with my Starburst based Desire. Forgive any typos!
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Thanks for your reply.
But it seems that the both of the 8GB cards that I have are faster than the 4GB card, then why are they slower in ROMs?!!!

tharwatq said:
Thanks for your reply.
But it seems that the both of the 8GB cards that I have are faster than the 4GB card, then why are they slower in ROMs?!!!
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Any ideas?

Well, from what I understand, 4gb are faster in real life than 8gb, all proper tests show that, look up test charts in Google. I believe its because it takes more time to search for info over the larger space. I'm only speculating on that, as I don't know this for sure.
Sent from my HTC Desire using XDA App

tinky1 said:
Well, from what I understand, 4gb are faster in real life than 8gb, all proper tests show that, look up test charts in Google. I believe its because it takes more time to search for info over the larger space. I'm only speculating on that, as I don't know this for sure.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Well, that is what I thought of too, take -for example- 500GB hard disk drive, it will take much time to scan than a 120 GB drive, which is logic.
I will do more research on this thing and will post back.
Thanks.

[Q] SD card speed

I have been trying some roms over the last few days and experience quite a big difference in speed. Some roms lag quite a bit, especially when opening sense apps.
My question is, does this depend on the speed of the SD card? I have a class 2 now (ordered a class 10 though). Are sense apps run from the SD card or the NAND?

Yes, it depends on the speed of the SD card, as in case of custom ROMs, all the apps are usually stored on the external partition. Plus at least a class 6 card is suggested in order to avoid the lags.

reynard80 said:
I have been trying some roms over the last few days and experience quite a big difference in speed. Some roms lag quite a bit, especially when opening sense apps.
My question is, does this depend on the speed of the SD card? I have a class 2 now (ordered a class 10 though). Are sense apps run from the SD card or the NAND?
Click to expand...
Click to collapse
I wouldn't buy a class 10 SD card for use with the Desire. Not all class 10 cards work, you best bet is class 6.

Pipusz said:
Yes, it depends on the speed of the SD card, as in case of custom ROMs, all the apps are usually stored on the external partition. Plus at least a class 6 card is suggested in order to avoid the lags.
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Is sense also stored on the SD card in case of custom roms? Or just the apps?
shankly1985 said:
I wouldn't buy a class 10 SD card for use with the Desire. Not all class 10 cards work, you best bet is class 6.
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Click to collapse
Well, ok, the class 10 has been delivered today, so I'll check it out tonight.
What kind of problems could a class 10 have in the desire? Not working at all?

Class 10 works ok as long as they are a respectable brand. Also you may want to consider installing SD Booster from market to increase deafult cache size to 1024kb or 2048kb

reynard80 said:
Is sense also stored on the SD card in case of custom roms? Or just the apps?
Well, ok, the class 10 has been delivered today, so I'll check it out tonight.
What kind of problems could a class 10 have in the desire? Not working at all?
Click to expand...
Click to collapse
Performance problems, the cards not doing there proper write and read speed. Let us know how you get on with new card please

Have tried the new card. It's a Transcend 16GB Class 10. Getting about 18Mb/s sequential reads and writes in windows.
Have benched it in stock froyo on my desire with SD Tools: 14,5 MB/s write and about 8 MB/s read. Strange that the read speeds are lower. Then again, it seems that there are no reliable SD speed benchmarks on Android..

class 10 micro sd 3mb/s write speed???

ok,
so i bought an 8gb kingston micro sd card, tested it with hw id and got 8mb/s write speed,
partitioned the card using gparted (allign to mib) with a 1gb ext and the remainder as fat32,
used sd card tester on my desire and it says write speed is 3mb/s or under,
so i tried sd speed increase set to 2048kb, atill 3mb/s or less write speed,
any ideas?

He,
I got also a Kingston 8GB Class 10 in my Desire (1GB Ext4 & Rest Fat32).
My speeds just for your ref.: 6.2MB/s writing, 16.4 MB/s reading with 2048kb.
I tried nearly every setting in SD speed increase but could not get over 6.x MB/s
---edit
just saw that we are running the same ROM (same kernel). maybe its ROM related as I also not have full 10MB/s? or its the SD card?

well i reflashed the rom without repartitioning the card and now im getting 6mb/s write speed,
better but still not as good as when i test the cards speed on my pc,
im not that worried about improving read speeds, i was just hoping that the faster write speed would solve some of the video recording lag i am getting,

maybe the cards you guys bought is not genuine but a chineese replica. you know how many fakes ciculate in market.
I have class 4 Sandisk 16gb card and I get 5mb writing speed. 12mb reading...
if a class 10 card has 6mb then I would doubt either the Testing software or the genuineness of the card

jjdoctor said:
maybe the cards you guys bought is not genuine but a chineese replica. you know how many fakes ciculate in market.
I have class 4 Sandisk 16gb card and I get 5mb writing speed. 12mb reading...
if a class 10 card has 6mb then I would doubt either the Testing software or the genuineness of the card
Click to expand...
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but when i do a speedtest from my pc via a card reader i get 8mb/s when i test the same cards speed in my phone i get 6mb/s, where does the 2mb/s go?

Try formating the cards on a pc. Full format/ factory condition. Then insert them on a stock rom phone to test the speeds. It's the only way to check them and be 100% sure.
Sent from my HTC Desire using XDA Premium App

SD speed reports my pny 8gb class 10 as writing at 8mb/s and reading 28 MB/s.
I have a 1gb ext4 partition after a 6.5 gb odd fat32 partition. Currently running leedroid latest R5 HD Rom.
Got it from play.com
Sent from my HTC Desire using Tapatalk

Did you try this tutorial?

What Class SD Card is best for SPEED/SMOOTHNESS for DATA 2 SD CARD SETUP ROMS

Also, whats an easy way to find out what Class your SD card is?

It is written in on the card itself.
Why two threads? This is not a news group.
Sent from my HTC Desire using Tapatalk 2

The higher the class, the faster the card, max = class 10.

Class 6 card should be fine for speed and will cost less than a class 10 card which is only needed for speed freaks.

djsynth said:
Also, whats an easy way to find out what Class your SD card is?
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Click to collapse
Just look on your card! On my Sandisk 16GB microSD there is an open circle with a number (4), this number is the speed-class!
Recommended for the Desire is Class 4 or 6, Class 10 seems to be incompatible with Desires Hardware and produces lags!
Regards,
Guido

I use a 16 GB Trancend class 6 and it works perfectly. My 6 GB class 6 card was way faster though.
By the way, the method of A2SD used is also very important. SenseEvolution was a lot slower on my HTC desire than Mildwild and both use A2SD, though in a different manner.

I'd recommend a Transcend Class 6 for Data2SD

Im currently using Marange's MIUI V4 rom latest version 2.5.18
my set up LX2X
Shaky's kernel,
wake min 245000 max 111300 lagfree governor
sleep min 245000 max 460000 smartass v2 governor
the rom is really fast and pretty darn stable but every time i open an app that downloads alot of data or is larger i have to wait from 5-15seconds for the menus to pop up, its basically just waiting at black or white screen, i believe this to be because of my sd card but im not sure... alot of apps are normal but some like facebook is the worst and whats app takes about 5-8seconds to open up fully aswel...
is there anything i can do ? i have a 16gb sd card

I have testet with benchmark and found, that the class 10 card has no more speed as the class 4 card. So what, i use the low budget but high capacity class 4 card 32 gb.

Thanks for your observations which are probably useful to someone interested in those kind of roms, but when you say something is...
djsynth said:
pretty darn stable
Click to expand...
Click to collapse
...there are no buts!
huetti said:
I have testet with benchmark and found, that the class 10 card has no more speed as the class 4 card. So what, i use the low budget but high capacity class 4 card 32 gb.
Click to expand...
Click to collapse
Because sdcard and it's class is only one part of the coin. You have random i/o and phones memory controller. Any of the links in chain not working as expected (to be taken relatively as Desire was not intended to use >class6) and you'll get crappy speeds.
Sent from my HTC Desire using Tapatalk 2

Even class2 runs fine for me and it is faster than the specification since it does anywhere betweeen 3-5mg/sec instead of only two.
Its an original sandisk

[Q] sd card class 10 speed makes difference on speed of int2ext/m2sd scripts?

i have a kingston class 10 sd card but i feel it is not really a genuine class 10 card.. my speed on sd card tester(on market) is only 1.8mb/s write speed and 10.03mb/s read speed
my question is if i buy a true genuine sandisk micro sd class 10 card.. will it speed up my applications using int2ext/m2sd or any a2sd scripts? actually what is the speed of the internal memory of the htc desire?

yeahman45 said:
i have a kingston class 10 sd card but i feel it is not really a genuine class 10 card.. my speed on sd card tester(on market) is only 1.8mb/s write speed and 10.03mb/s read speed
my question is if i buy a true genuine sandisk micro sd class 10 card.. will it speed up my applications using int2ext/m2sd or any a2sd scripts? actually what is the speed of the internal memory of the htc desire?
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Click to collapse
I have a kingston class 10 card too. Mine writing speed is 11.6 MB/s and reading is 18.1 MB/s (measured with sd-tool app). I was using InsertCoin 1.1.4(a2sd) rom with class 4 card, after upgrading the sd card to class 10, it really improved the performance.

ok mine must be fake then! will buy a sandisk one from ebay(anyone has a good experience buying microsd on ebay.. everyone seems to say they are all fake... even the trusted buyers sell fake ones?)

AFAIK Desire supports only Class 6, so your Class 10 SD will work as 6.
You will achieve Class 10 speeds only copying with USB from PC for example.

k3lcior said:
AFAIK Desire supports only Class 6, so your Class 10 SD will work as 6.
You will achieve Class 10 speeds only copying with USB from PC for example.
Click to expand...
Click to collapse
I doubt you'd get class 10 even through the USB.
Best way to check SD card speeds is to put it in a card reader and into laptop or PC.
Checking through the HTC desire is useless as speeds can vary.
I've just tested twice with sdcard tester and got 10mbps and 3.7mbps
Sent from my HTC Desire using xda app-developers app

dethrat said:
I doubt you'd get class 10 even through the USB.
Sent from my HTC Desire using xda app-developers app
Click to expand...
Click to collapse
Yes you get full speed thru usb as it's not using Desire onboard sd controller...
If you're not getting full speed it might be ROM issue for example.