Develop Bugs

Trying to find the fastest MicroSDHC for Evo 4G.

Yeah. So obviously other benchmarks for MicroSDHC cards on other phones won't be suitable due to hardware differences. The speed also can't be based on the cards class either, because again there are hardware differences and card manufacture quality differences. So I'm going to start by posting my card and results with SD Card Speed Tester from the market. I thought it would better to test the card on the phone itself, as that's where we will be using the phone the most.
I have not rooted or altered my Evo software in any way, if it matters.
Hardware revision 003.
Sofware 3.29.651.5
My card is a Kingston 4GB Class 4 MicroSDHC Model SDC4/4GB Amazon
SD Card Speed Tester Results 6 Tests(1-3MB Buffer) 2 each buffer size.:
1MB buffer:
Test 1: ------
Write 4MB/s
Read 10MB/s
Test 2: ------
Write 5MB/s
Read 10MB/s
2MB buffer:
Test 1: -----
Write 5MB/s
Read 10MB/s
Test 2: -----
Write 5MB/s
Read 10MB/s
3MB buffer:
Test 1: -----
Write 4MB/s
Read 10MB/s
Test 2:-----
Write 5MB/s
Read 11MB/s
Consistent speeds, but I want faster. Post your card model and results with SD Card Speed Tester app on the Evo 4G.

weehooherod said:
KOMPUTERBAY 16gb Class 6 Card
Write: 7 MB/s consistent
Read: 11 MB/s consistent
Testing with "h2testw" on my computer through a micro sd to sd adapter.
Only $47 with shipping too!
http://www.amazon.com/KOMPUTERBAY-m...dapter/dp/B003O996G8/ref=cm_cr_pr_product_top
Edit: Just tested with the SD Card Speed Test app on my Evo and got 4 MB/s Write and 13 MB/s Read. I don't trust that app though because there are too many factors affecting the results. I ALWAYS get higher scores right after a reboot, on airplane mode, all apps killed, super overclocked. Testing from a computer will give you more accurate results.
Click to expand...
Click to collapse
computer speed might also be a factor.
Try doing this test on difference computers if you can, I can test on 3 computers of varying speeds.

A-DATA SDHC 16GB Class 10 Card

Hi there
i bought a A-DATA 16GB SDHC Card to improve my performance, but it seems to me that this card isn´t class 10 ,..
i tested with AnTutu System Benchmark and it told me
SD Card Write 7.4MB/s
SD Card Read 12.7MB/s
Could anyone with a Class 10 Card post here his scores and the brand (kingston, sandisk, etc.)
Thanks

Mine more or less has the same speeds and it's class 2. I bought it from play.com and it;s their own. That might be able to put it into context for you. Also, if you using A2SD then you can get away with class 4 or class 6 for DATA2SD.

...
Thx for your reply, but i m a little bit dissapointed that after over 100 views, no one posted his scores with an class 10 card or a different one.
so i cant be sure if the card is fake or not but i think so because your calass 2 card get similar results.
hope that someone can point it out with his results.
thanks to any help / result.
i really miss a micros sd/sdhc card review with recommened cards for the desire.

Gonna receive that very same card in 24/48h, gonna let you know my speed for reference!

It's said that the class level is actually measured by the block size of 8k, not the max speed.

ok just done mine 16gb class 10
results as follows
SD Card Write 12.9MB/s 129
SD Card Read 15.4MB/s 154
total score was 1696
whatever that means i dont jknow but i hope this helps

Psyco-Man said:
SD Card Write 7.4MB/s
SD Card Read 12.7MB/s
Click to expand...
Click to collapse
I get SD Card Write 5.4MB/s and Read 15MB/s on my SanDisk Class 2 card.

Are you guys getting speed using phone app? Which one? Did you also try in your computer maybe?

@teorouge
Read first Post, ... Antutu System Benchmark ... with this free app in market you can test your phone but the main part for me is the memory card writing/read Speed test.
@gav12345
Which brand is your sd card ? kingston, sandisc, transcent,... ? Please let us know, because there is a huge difference between your class10 and mine.

Psyco-Man said:
@teorouge
Read first Post, ... Antutu System Benchmark ... with this free app in market you can test your phone but the main part for me is the memory card writing/read Speed test.
@gav12345
Which brand is your sd card ? kingston, sandisc, transcent,... ? Please let us know, because there is a huge difference between your class10 and mine.
Click to expand...
Click to collapse
i dont know just bought it cheap from [email protected] cheapest one i found and it was a few months ago sorry

http://forum.xda-developers.com/showthread.php?p=11256735#post11256735
Please be aware that actual read/write speed deppends on applications and data2sd / app2sd scripts running. Anyways, A-DATA class 10 16gb is a very good card.

Maybe the card-reader in the Desire isn't fast enough. Anybody knows which class the card-reader is?

kl_arnet said:
http://forum.xda-developers.com/showthread.php?p=11256735#post11256735
Please be aware that actual read/write speed deppends on applications and data2sd / app2sd scripts running. Anyways, A-DATA class 10 16gb is a very good card.
Click to expand...
Click to collapse
Yes it is , i use actually a kingston 16 gb class 10 .
My read/write spped : 15/9 mo/s on a D2EXT rom

DATA2SD/EXT rocks!

gav12345 said:
ok just done mine 16gb class 10
results as follows
SD Card Write 12.9MB/s 129
SD Card Read 15.4MB/s 154
total score was 1696
whatever that means i dont jknow but i hope this helps
Click to expand...
Click to collapse
I've got almost same score 1656, but my write speed is 3,5 MB/s and reed is 8,5. My card is Samsung 8 Gb. that came with my phone by default.
Sent from my Desire HD using XDA Premium App

various benchmark...
Rom- Cool HD V.8/apps2sd+
Cpu profile- smartass 128-1036mhz
card- Sandisk 8gb class4
benchmarking software- Antutu system benchmark
Total Score-1878
sdcard write- 3.9mb/s
sdcard read- 14.0mb/s
benchmark software- SD Tools
write speed- 4.2 MB/s
read speed- 79.5 MB/s............:O(tried 2 times might be a software prob)
Benchmark software- Quadrant Advanced
Total Score- 1821
Io score- 1412

Increase your sdcard read/write speed!!!

I havnt seen this talked about, remember it back in the og epic forums though.
This will allow you to change the cache set for read and write on the sdcard.
The first app SD Booster will allow you to make the change, it is set to 128 stock, I have found that 2048 (2mb) or 3072 (3mb) are the best settings.
The next app SD Tools will let you see the speed increase SD Booster has allowed.
Ill also inclue an update.zip if you dont want the SD Booster app, the script is set to 3mb.
Update.zip
SD Booster
SD Tools

ROM Toolbox Pro also has the SD Boost on performance settings. There are the 2048 and 3072 options. Thanks for the test app info
Sent from my SPH-D710 using xda premium

One more size option is available and that is 4096 KB on Rom Toobox.

kobridge said:
One more size option is available and that is 4096 KB on Rom Toobox.
Click to expand...
Click to collapse
But the best is the 20...
Sent from my SPH-D710 using Tapatalk

iSaint said:
But the best is the 20...
Sent from my SPH-D710 using Tapatalk
Click to expand...
Click to collapse
That's what I applied for my Samsung 32GB Class 10 SDHC.

kobridge said:
That's what I applied for my Samsung 32GB Class 10 SDHC.
Click to expand...
Click to collapse
I need that 64 gig now man porn collection getting too huge ...
Haha jk
Sent from my SPH-D710 using Tapatalk

iSaint said:
I need that 64 gig now man porn collection getting too huge ...
Haha jk
Sent from my SPH-D710 using Tapatalk
Click to expand...
Click to collapse
Good one! +1

Can't wait for manufacturers to start releasing phones with 2 microSD slots! Would be badass
Sent from my SPH-D710 using xda premium

Brilliant idea!
Or able to attach the usb hub on it!

at 0128kb: write: 18.1 mb/s, read: 7.6 mb/s
at 2048kb: write: 20.1 mb/s, read: 7.7 mb/s
at 3072kb: write: 18.5 mb/s, read: 7.5 mb/s
kingston 16gb class 10

vikramjatt11 said:
at 0128kb: write: 18.1 mb/s, read: 7.6 mb/s
at 2048kb: write: 20.1 mb/s, read: 7.7 mb/s
at 3072kb: write: 18.5 mb/s, read: 7.5 mb/s
kingston 16gb class 10
Click to expand...
Click to collapse
Must be something wrong with my phone. SD Tools tells me ~5 MB/s read and write with class 10 cards. I've tried 2 separate cards and a few different read ahead settings. This has been the same for ICS and GB on stock and repacked (GB) kernels.

Definitely test your speeds after using. Decreased mine for some reason
Sent from my Samsung Galaxy SII using Tapatalk 2 Beta 5

vikramjatt11 said:
at 0128kb: write: 18.1 mb/s, read: 7.6 mb/s
at 2048kb: write: 20.1 mb/s, read: 7.7 mb/s
at 3072kb: write: 18.5 mb/s, read: 7.5 mb/s
kingston 16gb class 10
Click to expand...
Click to collapse
Try to see at 1024kb ...
Just as a side note, class 10 should have a minimum of 10 mb/s of write speed... which you're clearly getting, but the read speed should've been equal or higher !! It doesn't make sense because to write, the card does 2 operations but to read it only performs one operation... so in theory, the card should get twice the speed when reading vs writing !!
Look at the bottom of this page, to see an example ... http://www.frys.com/product/6786695
Type
SD Card
Class:10
High Speed Series
Storage
32GB Capacity
Features
24MB Sequential Read Speed
13MB Sequential Write Speed

My read speeds are always 2.5-3x my write speeds, write is usually 10-12mbps and read is 25-33mbps
Sent from my SPH-D710 using xda premium

My read speed is 80.5 mb usually it's right around there.... why is mine so high?
Sent from my SPH-D710 using xda premium

dtr145r said:
My read speed is 80.5 mb usually it's right around there.... why is mine so high?
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Because you're testing the internal memory, not the external SD. If I pull out my SD card, I get the same read speeds.

Here is my SDcard statistics -
32GB Samsung Class 10
(Speed testing app - Antutu benchmark v2.7.3)
2048kb - write 5.1MB/s Read 43.1 MB/s
128kb - write 5.4 MB/s Read 18.3 MB/s
1024kb - write 5.5MB/s Read >50MB/s
3072kb - write 5.7MB/s Read >50MB/s
4096kb - write 5.6MB/s Read >50MB/s
(SD Tools - is this useless app? I can't believe this result. It seems like it doesn't care the buffer size)
4096kb - write 5.1MB/s Read 7.9 MB/s
3072kb - write 4.8MB/s Read 7.9MB/s
2048kb - write 5.1MB/s Read 8.2 MB/s
1024kb - write 5.0MB/s Read 8.0 MB/s
128kbkb - write 5.1MB/s Read 8.0MB/s
SD Card Tester
1024kb - write 5.54MB/s read 27.89MB/s
2048kb - write 5.67MB/s read 27.74MB/s
3072kb - write 5.43MB/s read 27.7MB/s
4096kb - write 5.49MB/s read 28.48MB/s
128kb - write 5.58MB/s read 29.58MB/s
I'll find out more tools to measure the speed.
- it seems like that's it. I couldn't find any more reliable apps to test SDcard speed.

peryp9 said:
Try to see at 1024kb ...
Just as a side note, class 10 should have a minimum of 10 mb/s of write speed... which you're clearly getting, but the read speed should've been equal or higher !! It doesn't make sense because to write, the card does 2 operations but to read it only performs one operation... so in theory, the card should get twice the speed when reading vs writing !!
Look at the bottom of this page, to see an example ... http://www.frys.com/product/6786695
Type
SD Card
Class:10
High Speed Series
Storage
32GB Capacity
Features
24MB Sequential Read Speed
13MB Sequential Write Speed
Click to expand...
Click to collapse
You are correct. Something has been wrong with my sd card ever since I got it. The speeds it gives are not accurate for a class 10.
Sent from my SPH-D710 using xda premium

Class10 SDcards the source of lag in ICS?

Hey gang,
This was a post from n2locarz that I found interesting and I wanted to post it in this forum
I personally have no education on the subject.
Talk amongst yourselves :fingers-crossed:
n2locarz said:
Hey guys, found this interesting article on slashdot about the "lag" of Android ICS. Looks like it may be a bigger issue than just our Inc2s. Anyway, read it over.
http://news.slashdot.org/story/13/01/12/1332204/the-android-lag-fix-that-really-wasnt
There is one comment I found very interesting. They are talking about faster "class 10" sd cards being better, which may not be the case:
This is a common misconception. The class of the SD card is a rating for sequential write speed, nothing more. It's important for cameras and camcorders - in fact it was developed for camcorders because some memory cards simply couldn't write the video data as quickly as the device was sending it to the card.
For an Android device you're more interested in its 4k random read/write performance. It's basically a computer reading/writing lots of small files, so it'll be most impacted by 4k read/write speeds.
As it turns out, manufacturers can tune a flash card for a certain type of performance. If you tune it for faster sequential speeds, random speeds suffer. Likewise if you tune it for random speed, sequential speeds suffer. The class 10 cards I've benchmarked typically hit 10-20 MB/s on sequential writes, but will bog down to as slow as 0.004 MB/s on random writes (yes, 4 kB/s - it was the card I bought before I learned all this. It took 4 hours to copy 4 GB of sheet music and MP3s to that class 10 card - a blissful 0.28 MB/s). Here are the CrystalDiskMark scores I got for a 32 GB class 4 card I have:
seq: 22.9 MB/s read, 4.3 MB/s write
512k: 22.0 MB/s read, 1.3 MB/s write
4k: 3.3 MB/s read, 1.3 MB/s write
Yikes! Only 4.3 MB/s write speed. Who would ever want that? Well look at the benchmarks for a 16 GB class 10 card I have:
seq: 21.8 MB/s read, 12.0 MB/s write
512k: 21.5 MB/s read, 0.9 MB/s write
4k: 5.7 MB/s read, 0.008 MB/s write (not a typo)
So yeah it's 3x faster at sequential writes. But it's slower at 512k writes, and more than 160x slower at 4k writes. It's definitely a very bad choice for an Android device despite being class 10.
The sweet spot for Android is around class 4 or 6. That gets you good 4k write speeds without punishingly poor sequential write speeds (which are important if you're doing something like copying a movie to the card). That said, not all cards are created equal. The "class 2" Samsung card which came with my phone is hands down the best card I've tested overall. It peaked at 11 MB/s sequential writes (meaning it could've been rated class 10), while 4k random writes were still above 1 MB/s. Sandisk is another company which seems to underrate their cards (and their class 10 cards have better if not stellar 4k random write speeds), which is why they're usually highly recommended for Android devices.
tl;dr - You want a class 4 or 6 card, or a good class 2 card for your Android device. Not a class 10 card.
Click to expand...
Click to collapse

CalvinAMi said:
Hey gang,
This was a post from n2locarz that I found interesting and I wanted to post it in this forum
I personally have no education on the subject.
Talk amongst yourselves :fingers-crossed:
Click to expand...
Click to collapse
I don't have a class 10 and I still got the lag while using CM10. After 5+ times of getting it, wiping, and reflashing back to CM10 I finally gave up and am now back on Venom for the first time since ~1.0.

SDcards.

Hey guys. So whats the best SD for the 10? Looks like the SanDisk Extreme PRO SD UHS-II is the fastest card available at the moment. Anyone using it and is there a noticable difference in phone storage speed vs the sdcard speed?

This is the one I was looking at. http://www.bhphotovideo.com/c/produ...qxpj_128g_ancm3_128gb_extreme_pro_uhs_ii.html
OR maybe the 64gb version
http://www.bhphotovideo.com/c/produ...sqxpj_064g_ancm3_64gb_extreme_pro_uhs_ii.html

I'm using the SanDisk Extreme Pro 32gb. Honestly, I can't tell much difference between it and my Samsung EVO+ Card

I'm using the 200gb Sandisk Extreme Pro. It's not the fastest, but I actually just cared more about capacity. Have it setup as my adoptable storage at the moment.

FYI, Amazon is selling Sony 128GB Class 10 UHS-1 MicroSD cards for ~$33. Link. 64GB is ~$23.

The fastest one you can get, that the 10 can actually take advantage of is the Sandisk Extreme Pro 64gb UHS1 - U3.
http://www.amazon.com/SanDisk-Extre...894646&sr=8-2&keywords=sandisk+extreme+pro+u3
The snapdragon 820 does not support UHS2 cards, so that would just be wasted money.

I'm using this one and the overall reviews are mixed but I get write speeds of 77 Mbps and reads at 89 Mbps but its relatively cheap for a 64 gig U3 card
http://www.amazon.com/PNY-Elite-Mic...346&sr=8-2&keywords=pny+elite#customerReviews

Larger capacity cards will be slower. 64GB may be best bang for buck if you are looking for performance. I preferred capacity as well as speed, and hence got:
http://www.amazon.com/Lexar-Professional-microSDXC-UHS-II-LSDMI128CBNL1000R/dp/B00U77V5KU
I have been happy with its performance.

regalpimpin said:
The fastest one you can get, that the 10 can actually take advantage of is the Sandisk Extreme Pro 64gb UHS1 - U3.
http://www.amazon.com/SanDisk-Extre...894646&sr=8-2&keywords=sandisk+extreme+pro+u3
The snapdragon 820 does not support UHS2 cards, so that would just be wasted money.
Click to expand...
Click to collapse
Oh that's great info! I didn't know that the 10 didn't support the UHS2 cards.
Sent from my HTC 10 using XDA-Developers mobile app

There will be a 265GB micro sd card from Samsung - Samsung EVO Plus 256GB .

I don't buy anything from Samsung as I have had horrible luck with their products. Had a 64GB a year ago that went bad. Personal experience/preference...
I am using the Sandisk 200GB, if you watch Amazon they run sales on them. I got mine in mid-march for $59.99.

128gb sandisk extreme on sale now at amazon... https://www.amazon.co.uk/dp/B01DYN4VPE/ref=cm_sw_r_other_apa_itlnxb0VTPKS3
Sent from my HTC 10 using XDA-Developers mobile app

I went with this one 95mb read, 90mb writing 128gb http://www.amazon.com/Samsung-Micro...&redirect=true&ref_=oh_aui_detailpage_o01_s00

Fastest MicroSD :-
https://www.amazon.com/dp/B010NE3N3S/ref=psdc_3015433011_t2_B00NUB3530
Source:-
https://havecamerawilltravel.com/photographer/fastest-microsd-cards

I got this one https://www.amazon.com/gp/product/B01DYN4VPE/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 which is $66 right now. I read that what is considered fastest is sustained fast write where if you are using the card as Adoptable Storage you may want fast 4Kb random writes which is not the same.
So, even where Extreme Pro exist I went for the Extreme in hopes the HTC 10 doesn't complain when adopting...and it didn't
Now I just have to keep searching for a plastic belt holster for a naked HTC 10..

4KB random reads are the most important for adoptable storage as you will be loading application data from the SD card.
4KB random write is also important but not as much as the read speed is.
To be fair though, random write speed is always much lower than random read speed, so focusing on as high random write speed as possible isn't a bad idea since if the random write speed is high, the random read speed will be high as well.
For reference the HTC 10 does about 10MB/s in both read and write for 4KB random.
As an example the 64GB size of Sandisk Extreme U3 has been benchmarked to be capable of 5.5MB/s and 0.5MB/s in 4KB random read and write respectively.
That card would be okay for adoptable storage, the read speed is halved compared to the internal storage but application writing data or updating them is excruciatingly slow.
Knowing the baseline 4KB random read/write speed of our internal storage and the usual SD cards, I would personally aim for at least 5MB/s read and 1.5MB/s read.
Higher end 32-64GB cards are usually capable of 7-10MB/s 4KB random read and 2-3MB/s 4KB random write. While Samsung's Pro+ 64GB card is crem de la crem at 10MB/s and 5MB/s respectively, about as good as it gets with current NAND technology.
Unfortunately SD card manufacturers don't advertise 4KB random speeds so we have to find the information ourselves and hope some kind soul has purchased the card we're looking at and benchmarked it with a decent card reader. Your best bet is to google the card make/model + crystaldiskmark or scour Amazon, Newegg and so on reviews for benchmark numbers..
If you find a review that states 4KB random speeds in IOPS (Input Output operations Per Second), the conversion to MBps = (IOPS * KB per IO) / 1024.
So if you have
4KB random read 1200IOPS = (1200*4)/1024 = 4.68MB/s
4KB random write 400 IOPS = (400*4)/1024 = 1.56MB/s
And the other way around IOPS = (MBps / KB per IO) * 1024