SD CARD TESTING

[brianzion]

brys snap ‎28 ‎January ‎2011 16h41m00s.png

i have run a test on this sd card Samsung 4GB Micro SDHC Memory Card / Class 4 they are faster than cheap sd cards these are available on play.com & Amazon uk various sizes details below

link for Crystal DiskMark website >> http://crystalmark.info/software/Crysta ... dex-e.html



link for play.com >> http://www.play.com/Mobiles/Mobile/4-/1 ... fer=search

write up from play.com >>5 Year Warranty
Waterproof - Innovative epoxy moulding compound tech helps over 24 hours in sea water
Shock proof - Survives high pressure, including the crush of a 1.6ton automobile
Magnet-proof - Resists over 13 times the magnetic force of home theater speakers

taken from Crystal DiskMark website>> Key Features
Measure sequential reads/writes speed
Measure random 512KB, 4KB, 4KB (Queue Depth=32) reads/writes speed
Select test data (Random, 0Fill, 1Fill)
Theme support
Multi-Language support
Important Notice
"MB/s" means 1,000,000byte/sec.

-----------------------------------------------------------------------
CrystalDiskMark 3.0 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

my test results >>


-----------------------------------------------------------------------
CrystalDiskMark 3.0 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 8.337 MB/s
Sequential Write : 3.867 MB/s
Random Read 512KB : 7.553 MB/s
Random Write 512KB : 1.691 MB/s
Random Read 4KB (QD=1) : 2.650 MB/s [ 647.0 IOPS]
Random Write 4KB (QD=1) : 0.290 MB/s [ 70.8 IOPS]
Random Read 4KB (QD=32) : 3.109 MB/s [ 759.1 IOPS]
Random Write 4KB (QD=32) : 0.242 MB/s [ 59.1 IOPS]

Test : 50 MB [T: 44.5% (1722.6/3872.0 MB)] (x1)
Date : 2011/01/28 16:40:30
OS : Windows 7 Home Premium Edition [6.1 Build 7600] (x64)

[barrelockingnut]

Nice informative post Brianzion

[brianzion]

not a problem the sd cards are quite cheap at the moment and that extra speed will help read/write from songs/ vids/ etc

[mojo]

but what about the cards benchmarks when its in the scroll???

[brianzion]

that test was done with the card in the scroll mojo with 2GB of data on it

[mojo]

so you were benchmarking the scroll whilst attached to the PC?

[brianzion]

yes mojo did not see the point to test it without any data on or just plugged in to the pc the reading would not give a true value of using it in the scroll, download the testbench CrystalDiskMark 3.0 and try yourself http://crystalmark.info/software/Crysta ... dex-e.html
my point of posting the thread is to make people aware there are better sd cards that read/write faster that would be better for the scroll. cheap ones are just that cheap.

[mojo]

indeed thats true, i may give it a go just to add comparison with a larger card, ive got some smaller capacity cheapo cards lying around too that i could benchmark...

[brianzion]

brys snap ‎29 ‎January ‎2011 17h10m49s.png

@mojo
excellent mojo if you do post the results here will be interesting. above is a test of a portable hard drive to help see the difference

[will8578]

hey guys, hope you are all well, do you know there is a thread on xda developers where someone has found out that all sd cards dont run at their full capability on android, you hav to flash ready made sripts to make them run faster..