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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.

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.

[Q] Which SD card to buy?

To the Community:
I use one of these puppies:
http://dx.com/p/sd-to-microsd-transflash-card-converter-module-27001#.UvLz3PldWSo
so I'm in the market for a 128gb SD card.
I've searched but cannot find the theoretical maxima for read / write speeds for the GN10.1-2014 and I don't wanna buy too much card for the hardware.
I'm contemplating the Lexar Pro or the SanDisk Extreme Plus.
Any recommendations?
Thanks in advance everybody...

SanDisk has proven to be reliable and fast SD card. At least for the 64GB model.
Sent from my SM-P605 using Tapatalk

whatllitbenext said:
To the Community:
I use one of these puppies:
http://dx.com/p/sd-to-microsd-transflash-card-converter-module-27001#.UvLz3PldWSo
so I'm in the market for a 128gb SD card.
I've searched but cannot find the theoretical maxima for read / write speeds for the GN10.1-2014 and I don't wanna buy too much card for the hardware.
I'm contemplating the Lexar Pro or the SanDisk Extreme Plus.
Any recommendations?
Thanks in advance everybody...
Click to expand...
Click to collapse
Hello whatllitbenext,
here are benchmark results for the internal flash memory. Taken from http://www.notebookcheck.com/Test-Samsung-Galaxy-Note-10-1-2014-Edition-Tablet.105624.0.html
AndroBench 3
Sequential Read 256KB
103.96 MB/s
Sequential Write 256KB
22.35 MB/s
Random Read 4KB
15.97 MB/s
Random Write 4KB
2.09 MB/s
best regards
Getrid …

Getrid said:
Hello whatllitbenext,
here are benchmark results for the internal flash memory. Taken from http://www.notebookcheck.com/Test-Samsung-Galaxy-Note-10-1-2014-Edition-Tablet.105624.0.html
AndroBench 3
Sequential Read 256KB
103.96 MB/s
Sequential Write 256KB
22.35 MB/s
Random Read 4KB
15.97 MB/s
Random Write 4KB
2.09 MB/s
best regards
Getrid …
Click to expand...
Click to collapse
Thanks Getrid.
What about to the external SD card? Is a 90mb/sec. read, 45 mb/sec. write SD card overkill?

whatllitbenext said:
Thanks Getrid.
What about to the external SD card? Is a 90mb/sec. read, 45 mb/sec. write SD card overkill?
Click to expand...
Click to collapse
Depends on how you want to use your tablet. If mainly for (HD) video recording/watching movies a fast card with high sequential r/w stats would be my first choice.
On the other hand, my experience from using my HTC HD2 with multiple OS booting from SD tells me, that sequential r/w speed doesn't matter when dealing with a lot of smaller data sizes, like from apps. In that case decent random r/w stats, (random) access time and also IOPS/sec come largely into effect - that is a class 10 card won't pay off and you should better watch out for a, for example, class 4 or 6 card from Sandisk.
You may also have a look at this very interesting thread:
http://forum.xda-developers.com/showthread.php?t=1947560
Kindest regards
Getrid …

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

horrible microSD card speed

Hey everybody,
did somebody else notice that the microSD chipset/bus on this device is absolutely horrible?
I bought a SanDisk extreme plus 64 GB card rated for UHS-I U3 V30 A1 class with up to 100 Mb/s sequential read and up to 90 Mb/s sequential write. According to several websites that card actually gives that performance almost entirely.
I bought that card for my Nintendo switch but tested it on my Moto Z2 force. Shockingly the card doesn't even reach 40 Mb/s on either seq read nor write.
Putting that same card in my old Motorola Z it yields 86 Mb/s read and 68 Mb/s write speed. The IOPS are also massively higher on the older phone.
I tried different schedulers, different read ahead values aswell and cfq offered the best performance.
Using the same settings on my Z2 force makes no difference, still abysmal performance.
Can someone confirm that this isn't specific to my phone alone?
Kind regards

regenwurm16 said:
Hey everybody,
did somebody else notice that the microSD chipset/bus on this device is absolutely horrible?
I bought a SanDisk extreme plus 64 GB card rated for UHS-I U3 V30 A1 class with up to 100 Mb/s sequential read and up to 90 Mb/s sequential write. According to several websites that card actually gives that performance almost entirely.
I bought that card for my Nintendo switch but tested it on my Moto Z2 force. Shockingly the card doesn't even reach 40 Mb/s on either seq read nor write.
Putting that same card in my old Motorola Z it yields 86 Mb/s read and 68 Mb/s write speed. The IOPS are also massively higher on the older phone.
I tried different schedulers, different read ahead values aswell and cfq offered the best performance.
Using the same settings on my Z2 force makes no difference, still abysmal performance.
Can someone confirm that this isn't specific to my phone alone?
Kind regards
Click to expand...
Click to collapse
It's not your phone. Mine is slow reading my 400gb SanDisk. My v30+ is slow in this too.

There was some testing done on notebookcheck.net on both of those models and the SD card behavior wasn't nearly as pronounced but they used a different reference card. I don't think it's horrible but I don't expect to get anything near the max values in real life situations

For both models I asked Motorola support about the specific classification of the SD card bus but they never could get anymore specific than UHS-I. Questioned if only UHS-I U1 or U3 or possible max speeds could not be answered for both phones.
I think it's pathetic for a 800€ phone to be outdone immensely by its 650€ predecessor in that regard.
The Z2 force itself is in anyway better than the Moto Z but it's still annoying that they downgraded the SD card reader so heavily.