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+--- Thread: recommended micro sd card ? (/showthread.php?tid=191)
RE: recommended micro sd card ? - NondescriptMember - 05-08-2016
(05-07-2016, 01:19 AM)tkaiser Wrote:Yes, I would have preferred to not have had to go through that. Thank you again for all your help!(05-06-2016, 05:07 PM)NondescriptMember Wrote: I just loaded the newest Android image to this new card. Very stable
Isn't it funny that using an SD card with ultra slow random writes even leads to Android behaving unstable and that problems are gone when using any recommended SD card that shows high random I/O performance?
And still only bullshit recommendations like 'speed at least class 10' available in Pine64 wiki leading to all sorts of troubles for their users. But why should this change? Why spending a minute on improving documentation when their users can waste hours and hours of their live due to missing/wrong recommendations.
BTW: With the 16GB test something clearly went wrong and you should keep in mind that when the card is used inside Pine64 the board's SDIO implementation limits sequential transfer speeds anyway to 23MB/s max. All the numbers here also apply to Pine64: http://forum.armbian.com/index.php/topic/954-sd-card-performance/
RE: recommended micro sd card ? - benpope81 - 05-09-2016
I can't see any tests here that have been run on the Pine64+ 2GB, so here goes: Samsung EVO 64GB (MB-MP64D):
Code:
ubuntu@pine64:~/development$ git clone https://github.com/hglm/flash-bench.git
ubuntu@pine64:~/development$ cd flash-bench/
ubuntu@pine64:~/development/flash-bench$ make
ubuntu@pine64:~/development/flash-bench$ sudo ./flash-bench
Using test file flash-bench.tmp (using all 512MB).
Benchmark: Sequential read Limits: Total size: 512MB Duration: 60s
512.0MB processed in 23.64s (21.66MB/s), CPU: user 0.01%, sys 0.99%
Benchmark: Sequential write Limits: Total size: 512MB Duration: 60s
512.0MB processed in 31.47s (16.27MB/s), CPU: user 0.02%, sys 1.09%
Benchmark: Random read Limits: Total size: 512MB Duration: 60s
512.0MB processed in 40.83s (12.54MB/s), CPU: user 0.02%, sys 1.17%
Benchmark: Random write Limits: Total size: 512MB Duration: 60s
512.0MB processed in 52.24s (9.80MB/s), CPU: user 0.01%, sys 0.80%
ubuntu@pine64:~/development$ wget http://www.iozone.org/src/current/iozone3_434.tar
ubuntu@pine64:~/development$ tar xvf iozone3_434.tar
ubuntu@pine64:~/development$ cd iozone3_434/src/current
ubuntu@pine64:~/development$ make linux-arm
ubuntu@pine64:~/development$ sudo iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
...
Include fsync in write timing
O_DIRECT feature enabled
Auto Mode
File size set to 102400 kB
Record Size 4 kB
Record Size 16 kB
Record Size 512 kB
Record Size 1024 kB
Record Size 16384 kB
Command line used: ./iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
Output is in kBytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 kBytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
102400 4 3123 3979 9709 9702 9697 4102
102400 16 10940 12180 16150 16149 16167 12121
102400 512 21655 21753 23216 23217 23216 21627
102400 1024 21814 21794 23199 23202 23203 21834
102400 16384 21868 21851 23219 23217 23217 21914 RE: recommended micro sd card ? - jl_678 - 05-11-2016
The test and result is super helpful. Thank you! It shows me that my card sucks. No surprise really, I am replacing it with an EVO.
RE: recommended micro sd card ? - Bob123456789 - 05-17-2016
Does any data exist comparing the SD cards that come with the Pine A64 to the others that have been tested here?
RE: recommended micro sd card ? - BeerSnob - 06-16-2016
(05-17-2016, 02:10 PM)Bob123456789 Wrote: Does any data exist comparing the SD cards that come with the Pine A64 to the others that have been tested here?
Yes, see data below:
Data for included SD card from Pine.
- It SUCKS!
- End of data.
RE: recommended micro sd card ? - Bob123456789 - 06-16-2016
Thanks BeerSnob.
The hyperlink you included doesn't work. Can you post it again?
RE: recommended micro sd card ? - BeerSnob - 06-16-2016
(06-16-2016, 08:18 AM)Bob123456789 Wrote: Thanks BeerSnob.
The hyperlink you included doesn't work. Can you post it again?
Sorry Bob, I was being snarky/sarcastic ....there is no link.
RE: recommended micro sd card ? - Bob123456789 - 06-16-2016
Sorry for not picking up on that!
It just seems that we have 5-6 different cards tested and can compare them but none are the one that is provided by the board maker.
RE: recommended micro sd card ? - tllim - 06-16-2016
(06-16-2016, 09:16 AM)Bob123456789 Wrote: Sorry for not picking up on that!
It just seems that we have 5-6 different cards tested and can compare them but none are the one that is provided by the board maker.
Based on the Sunxi, Armbian, and Pine64 community, highly recommended to use Samsung 32GB EVO Plus microSD card.
RE: recommended micro sd card ? - Bob123456789 - 06-16-2016
If I were making the decision today that would be the best available information.
I have already purchased two cards from Pine and am looking for data comparing the performance of the Pine supplied cards to the others.
That way I understand the performance hit I take using the Pine cards.