SD Strange-results - or - How I learned to love CM7 on SD - Dec-11 results compiled!

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wizardknight

Senior Member
Nov 1, 2009
1,067
307
Seattle WA
Transend 8gb cl2
Random Read 4KB (QD=32) : 4.443 MB/s [ 1084.6 IOPS]
Random Write 4KB (QD=32) : 0.018 MB/s [ 4.5 IOPS]

Kingston 4gb cl4 japan
Random Read 4KB (QD=32) : 3.568 MB/s [ 871.1 IOPS]
Random Write 4KB (QD=32) : 0.028 MB/s [ 6.7 IOPS]

Kingston 4gb cl4 taiwan
Random Read 4KB (QD=32) : 1.866 MB/s [ 455.7 IOPS]
Random Write 4KB (QD=32) : 0.016 MB/s [ 4.0 IOPS]

no name 4gb cl2
Random Read 4KB (QD=32) : 0.900 MB/s [ 219.7 IOPS]
Random Write 4KB (QD=32) : 0.597 MB/s [ 145.9 IOPS]

sandisk 8gb cl4 china
Random Read 4KB (QD=32) : 2.170 MB/s [ 529.8 IOPS]
Random Write 4KB (QD=32) : 0.995 MB/s [ 242.8 IOPS]

Sandisk 16gb cl4 china
Random Read 4KB (QD=1) : 2.059 MB/s [ 502.6 IOPS]
Random Write 4KB (QD=1) : 0.534 MB/s [ 110.7 IOPS]
 

upthepool

Member
Jan 31, 2012
8
0
32gb SanDisk Class 2

Hello Everyone,

From all the posts I have read, I get the idea that a SanDisk 16gb class 2 is the best card for running the nook off the SD card. I would like to get the most space possible. What is wrong with a 32gb class 2, or 4 SanDisk?

Thanks.

Shawn
 
X

xdanc

Guest
Sandisk 8GB class 4


Code:
           Sequential Read :    13.892 MB/s
          Sequential Write :     4.954 MB/s
         Random Read 512KB :    13.016 MB/s
        Random Write 512KB :     2.170 MB/s
    Random Read 4KB (QD=1) :     4.235 MB/s [  1034.0 IOPS]
   Random Write 4KB (QD=1) :     1.321 MB/s [   322.5 IOPS]
   Random Read 4KB (QD=32) :     4.519 MB/s [  1103.3 IOPS]
  Random Write 4KB (QD=32) :     1.054 MB/s [   257.4 IOPS]

Patriot 8GB class 4 (which I purchases before reading this thread)

Code:
   Random Read 4KB (QD=32) :     3.289 MB/s [   802.9 IOPS]
  Random Write 4KB (QD=32) :     0.013 MB/s [     3.2 IOPS]

I got a lot of "force close" with the patriot card, and the performance wasn't great either. With Sandisk, the first few hours seem a lot better than the Patriot experience, hope it holds.
 

wizardknight

Senior Member
Nov 1, 2009
1,067
307
Seattle WA
Hello Everyone,

From all the posts I have read, I get the idea that a SanDisk 16gb class 2 is the best card for running the nook off the SD card. I would like to get the most space possible. What is wrong with a 32gb class 2, or 4 SanDisk?

Thanks.

Shawn

My new 16gb Sandisk had half the random write speed of my 4 and 8gb versions. Sandisk is still better than the other brands on average, but I would suggest going with an 8 if you can. Not saying there are not 16 & 32 gb units that are good, but I had better luck finding smaller ones with high random write speeds.
 

upthepool

Member
Jan 31, 2012
8
0
32 GB SanDisk Class 4 Results and Question

My new 16gb Sandisk had half the random write speed of my 4 and 8gb versions. Sandisk is still better than the other brands on average, but I would suggest going with an 8 if you can. Not saying there are not 16 & 32 gb units that are good, but I had better luck finding smaller ones with high random write speeds.

I bought a 32GB SanDisk Class 4 and got the following random speeds. Do I need to be concerned that the 512KB write is on the slower side?

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 21.907 MB/s
Sequential Write : 4.804 MB/s
Random Read 512KB : 21.266 MB/s
Random Write 512KB : 0.548 MB/s
Random Read 4KB (QD=1) : 3.247 MB/s [ 792.7 IOPS]
Random Write 4KB (QD=1) : 1.429 MB/s [ 348.9 IOPS]
Random Read 4KB (QD=32) : 2.918 MB/s [ 712.4 IOPS]
Random Write 4KB (QD=32) : 1.453 MB/s [ 354.8 IOPS]

Test : 1000 MB [D: 0.0% (0.0/29.7 GB)] (x5)
Date : 2012/02/01 14:20:40
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
 

jdpdata

Senior Member
Dec 22, 2011
601
208
Los Angeles
Smooth Sailing Here!

Sandisk SDSDQM-032G-B35N Bought from Amazon Retail package.

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 22.965 MB/s
Sequential Write : 6.302 MB/s
Random Read 512KB : 20.895 MB/s
Random Write 512KB : 7.750 MB/s
Random Read 4KB (QD=1) : 7.395 MB/s [ 1805.5 IOPS]
Random Write 4KB (QD=1) : 1.623 MB/s [ 396.3 IOPS]
Random Read 4KB (QD=32) : 7.434 MB/s [ 1814.9 IOPS]
Random Write 4KB (QD=32) : 1.596 MB/s [ 389.7 IOPS]

Test : 50 MB [F: 0.0% (0.0/29.7 GB)] (x5)
Date : 2011/12/28 10:52:51
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
 

upthepool

Member
Jan 31, 2012
8
0
Weird Touchscreen Issue

With the 32GB the touchscreen was totally unresponsive. Worked perfectly with an 8. Anyone heard of this issue?

I bought a 32GB SanDisk Class 4 and got the following random speeds. Do I need to be concerned that the 512KB write is on the slower side?

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 21.907 MB/s
Sequential Write : 4.804 MB/s
Random Read 512KB : 21.266 MB/s
Random Write 512KB : 0.548 MB/s
Random Read 4KB (QD=1) : 3.247 MB/s [ 792.7 IOPS]
Random Write 4KB (QD=1) : 1.429 MB/s [ 348.9 IOPS]
Random Read 4KB (QD=32) : 2.918 MB/s [ 712.4 IOPS]
Random Write 4KB (QD=32) : 1.453 MB/s [ 354.8 IOPS]

Test : 1000 MB [D: 0.0% (0.0/29.7 GB)] (x5)
Date : 2012/02/01 14:20:40
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
 

upthepool

Member
Jan 31, 2012
8
0
Touchscreen Issue Explained

With the 32GB the touchscreen was totally unresponsive. Worked perfectly with an 8. Anyone heard of this issue?

Turns out it was a problem with the versions of CM7 I was using.

From: Eyeballer:

http://forum.xda-developers.com/showthread.php?t=1030227

****BRAND NEW NOOK COLORS (Dec 2011+/Jan 2012+ are now shipping with a different touchscreen/digitizer (same as used in the nook tablet). As of now this driver is not included in CM7, you are welcome to try to flash CM7, if your touchscreen is unresponsive, restore to stock or flash CM9. CM9 will work as the driver is included.***

It appears that 7.1 works, as well as the most recent nightly from Nov.
 

freonchill

Senior Member
Jul 11, 2011
260
57
Atlanta
sandisk 8gb cl4 card; purchased on ebay seller dailysteals
ill update the post when i get a magnifying glass and can read the silkscreened code

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 20.062 MB/s
Sequential Write : 6.226 MB/s
Random Read 512KB : 19.572 MB/s
Random Write 512KB : 2.124 MB/s
Random Read 4KB (QD=1) : 3.300 MB/s [ 805.6 IOPS]
Random Write 4KB (QD=1) : 0.973 MB/s [ 237.5 IOPS]
Random Read 4KB (QD=32) : 3.228 MB/s [ 788.1 IOPS]
Random Write 4KB (QD=32) : 0.854 MB/s [ 208.6 IOPS]

Test : 50 MB [W: 0.0% (0.0/7565.2 MB)] (x5)
Date : 2012/02/21 16:42:15
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
 

flatulatorx

New member
Mar 5, 2012
3
1
another vote for samsung

My Samsung uSD 32GB class10 came in the mail today. Tested straight out of the retail package through a Sandisk Extreme Pro (SDXC UHS-I compatible) expresscard reader and SD card adapter.

Card is made in Korea. Purchased from Korean ebay merchant mclothesworld (not affiliated in case you're wondering) Feb 2012.

Very pleased. Samsung's class10 uSD seems to be the only one that consistently excels in both sequential and random writes. :)

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.741 MB/s
Sequential Write : 12.343 MB/s
Random Read 512KB : 23.331 MB/s
Random Write 512KB : 12.070 MB/s
Random Read 4KB (QD=1) : 7.222 MB/s [ 1763.2 IOPS]
Random Write 4KB (QD=1) : 1.298 MB/s [ 316.8 IOPS]
Random Read 4KB (QD=32) : 7.635 MB/s [ 1863.9 IOPS]
Random Write 4KB (QD=32) : 1.315 MB/s [ 321.0 IOPS]

Test : 50 MB [M: 0.0% (0.0/29.2 GB)] (x5)
Date : 2012/03/05 9:32:33
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
Samsung uSD 32GB class10 (Korea)
 
Last edited:
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TDO

Senior Member
Feb 15, 2006
339
37
I get the following resulst with my new second Samsung Class 10 card.

Samsung Class 10
MB-MSBGA/EU

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 20.108 MB/s
Sequential Write : 12.312 MB/s
Random Read 512KB : 19.856 MB/s
Random Write 512KB : 12.051 MB/s
Random Read 4KB (QD=1) : 4.526 MB/s [ 1104.9 IOPS]
Random Write 4KB (QD=1) : 1.372 MB/s [ 334.9 IOPS]
Random Read 4KB (QD=32) : 4.722 MB/s [ 1152.8 IOPS]
Random Write 4KB (QD=32) : 1.371 MB/s [ 334.8 IOPS]

Test : 50 MB [I: 0.0% (0.0/29.2 GB)] (x5)
Date : 2012/03/12 14:16:16
 
Last edited:

Sm!th

Member
Jan 6, 2012
22
0
Benchmarks to report

I had a Lexar 32GB Class 10 that I was using on my NookColor. Since then I got wiser and bought a SanDisk Class 6. Here are the benchmarks:

SanDisk Mobile Ultra 32GB Micro SDHC Flash Card Model SDSDQY-032G-A11A
Code:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    19.867 MB/s
          Sequential Write :     9.012 MB/s
         Random Read 512KB :    19.454 MB/s
        Random Write 512KB :     3.746 MB/s
    Random Read 4KB (QD=1) :     3.610 MB/s [   881.4 IOPS]
   Random Write 4KB (QD=1) :     1.543 MB/s [   376.7 IOPS]
   Random Read 4KB (QD=32) :     3.842 MB/s [   938.0 IOPS]
  Random Write 4KB (QD=32) :     1.594 MB/s [   389.0 IOPS]

  Test : 50 MB [E: 6.8% (7.9/115.8 MB)] (x5)
  Date : 2012/03/12 9:25:35
    OS : Windows 7  SP1 [6.1 Build 7601] (x64)

SanDisk Mobile Ultra 16GB Micro SDHC Flash Card Model SDSDQY-016G-A11A
Code:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    19.111 MB/s
          Sequential Write :     8.513 MB/s
         Random Read 512KB :    18.801 MB/s
        Random Write 512KB :     3.787 MB/s
    Random Read 4KB (QD=1) :     3.558 MB/s [   868.6 IOPS]
   Random Write 4KB (QD=1) :     1.978 MB/s [   482.8 IOPS]
   Random Read 4KB (QD=32) :     3.643 MB/s [   889.4 IOPS]
  Random Write 4KB (QD=32) :     1.323 MB/s [   322.9 IOPS]

  Test : 50 MB [E: 3.6% (2.7/74.8 MB)] (x5)
  Date : 2012/03/02 10:19:10
    OS : Windows 7  SP1 [6.1 Build 7601] (x64)

Lexar High Speed MicroSDHC 32 GB Class 10 Flash Memory Card with Reader LSDMI32GBSBNAR
Code:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    19.872 MB/s
          Sequential Write :    11.770 MB/s
         Random Read 512KB :    19.539 MB/s
        Random Write 512KB :     1.553 MB/s
    Random Read 4KB (QD=1) :     3.933 MB/s [   960.3 IOPS]
   Random Write 4KB (QD=1) :     0.013 MB/s [     3.2 IOPS]
   Random Read 4KB (QD=32) :     4.027 MB/s [   983.3 IOPS]
  Random Write 4KB (QD=32) :     0.027 MB/s [     6.7 IOPS]

  Test : 50 MB [H: 19.0% (5.7/29.8 GB)] (x5)
  Date : 2012/02/28 13:57:16
    OS : Windows 7  SP1 [6.1 Build 7601] (x64)
 

waxhell

Member
Mar 23, 2011
20
6
Updated the spreadsheet again, and also added in some more of my own results:

Sandisk Class 4, 16GB (SDSQ-016G-A11M) -- My 2nd CL4/16GB Card
Sequential Read : 22.479 MB/s
Sequential Write : 4.849 MB/s
Random Read 512KB : 21.965 MB/s
Random Write 512KB : 2.921 MB/s
Random Read 4KB (QD=1) : 4.085 MB/s [ 997.2 IOPS]
Random Write 4KB (QD=1) : 1.158 MB/s [ 282.7 IOPS]
Random Read 4KB (QD=32) : 4.189 MB/s [ 1022.7 IOPS]
Random Write 4KB (QD=32) : 0.824 MB/s [ 201.2 IOPS]

Test : 50 MB [E: 20.0% (3.0/14.8 GB)] (x5)
Date : 2012/03/29 12:29:23
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
 

freonchill

Senior Member
Jul 11, 2011
260
57
Atlanta
sandisk 32gb cl4, bought on 1saleaday.com
need a magnifying glass to see the actual model # (will update post when found out)

Code:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 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 :    20.062 MB/s
          Sequential Write :     5.158 MB/s
         Random Read 512KB :    19.514 MB/s
        Random Write 512KB :     3.095 MB/s
    Random Read 4KB (QD=1) :     3.191 MB/s [   779.1 IOPS]
   Random Write 4KB (QD=1) :     1.266 MB/s [   309.1 IOPS]
   Random Read 4KB (QD=32) :     3.405 MB/s [   831.3 IOPS]
  Random Write 4KB (QD=32) :     1.025 MB/s [   250.3 IOPS]

  Test : 50 MB [W: 0.0% (0.0/29.7 GB)] (x5)
  Date : 2012/03/29 15:23:36
    OS : Windows 7  SP1 [6.1 Build 7601] (x64)

update 4/1
got my camera out and took a picture of the 8gb / 16gb / 32gb sandisk micro-sdhc cards
the silk screen has the serial number and
the 16gb / 32gb say "BN MADE IN CHINA" (see attached image, serial blanked)
the 8gb only says "MADE IN CHINA"

there is nothing on the back of any of them, other than what appears to be a small square of black tape that you can see several indentations (or perhaps raised square dots)

i got the 8gb from ebay seller dailysteals 2/12
i got the 16gb from From "everything but the stromboli" on Amazon 7/11
i got the 32gb from 1saleaday.com 3/12

the speed of all of sandisk's are pretty good, so i am guessing that they are not fake
whats everyone else's sandisk's say? does the actual chip have the model number - e.g. "SDSDQM-032G" or similar on it? or do you know that just from what the packaging / seller says that the item is? the high quality images on newegg show "BM MADE IN CHINA" on most of the sandisk models. the sandisk "ultra mobile" cl6 have the silkscreen serial number and "MADE IN CHINA" on the back rather than on the front.
 

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DiscMan55

Senior Member
Feb 29, 2012
90
63
Hello,
PNY Class 6 microSD with SD adapter
Rev: 02, Made in Taiwan, 8 GB, Class 6

Now functioning as my permanent laptop ReadyBoost :) (in a Dell E5500)

Code:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    13.974 MB/s
          Sequential Write :    10.705 MB/s
         Random Read 512KB :    13.965 MB/s
        Random Write 512KB :     2.084 MB/s
    Random Read 4KB (QD=1) :     8.122 MB/s [  1982.8 IOPS]
   Random Write 4KB (QD=1) :     0.020 MB/s [     4.8 IOPS]
   Random Read 4KB (QD=32) :     8.627 MB/s [  2106.1 IOPS]
  Random Write 4KB (QD=32) :     0.017 MB/s [     4.3 IOPS]

  Test : 100 MB [M: 0.0% (0.1/7782.0 MB)] (x5)
  Date : 2012/04/01 17:08:51
    OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x86)
    PNY Class 6 8GB, Rev 02, Made in Taiwan
 
Last edited:

ruhtra

New member
Apr 14, 2012
1
0
more Sandisk benchmarks

Thanks for the great list. Here's some more including the finely printed numbers on the cards.


Sandisk 32GB Class 4 Micro SDHC
1202608505D7P BD Made in China

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 18.156 MB/s
Sequential Write : 4.899 MB/s
Random Read 512KB : 13.056 MB/s
Random Write 512KB : 2.772 MB/s
Random Read 4KB (QD=1) : 1.522 MB/s [ 371.5 IOPS]
Random Write 4KB (QD=1) : 0.825 MB/s [ 201.5 IOPS]
Random Read 4KB (QD=32) : 1.924 MB/s [ 469.7 IOPS]
Random Write 4KB (QD=32) : 0.594 MB/s [ 145.1 IOPS]

Test : 50 MB [F: 3.3% (1.0/29.7 GB)] (x5)
Date : 2012/04/14 13:49:08
OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)


Sandisk Micro SDHC 16GB Class 4
1132908097S646 BL Made in Taiwan

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 12.024 MB/s
Sequential Write : 4.751 MB/s
Random Read 512KB : 11.634 MB/s
Random Write 512KB : 2.822 MB/s
Random Read 4KB (QD=1) : 1.308 MB/s [ 319.4 IOPS]
Random Write 4KB (QD=1) : 0.784 MB/s [ 191.5 IOPS]
Random Read 4KB (QD=32) : 1.440 MB/s [ 351.7 IOPS]
Random Write 4KB (QD=32) : 0.631 MB/s [ 154.0 IOPS]

Test : 50 MB [F: 0.0% (0.0/14.8 GB)] (x5)
Date : 2012/04/14 14:04:54
OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)
 

KidJoe

Inactive Recognized Contributor
Aug 23, 2008
3,208
1,560
Thorndale/Romansville, PA
Sandisk 64G MicroSDXC Class6 SDSDQY-064G-A11A (purchased at BestBuy)
Fresh out of the box (formatted as exFAT)


-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 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 : 19.651 MB/s
Sequential Write : 8.584 MB/s
Random Read 512KB : 19.202 MB/s
Random Write 512KB : 3.630 MB/s
Random Read 4KB (QD=1) : 3.112 MB/s [ 759.7 IOPS]
Random Write 4KB (QD=1) : 1.169 MB/s [ 285.5 IOPS]
Random Read 4KB (QD=32) : 3.364 MB/s [ 821.4 IOPS]
Random Write 4KB (QD=32) : 1.104 MB/s [ 269.5 IOPS]

Test : 50 MB [L: 0.0% (0.0/59.4 GB)] (x5)
Date : 2012/04/27 19:14:49
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

Same card formatted FAT32

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (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 : 19.730 MB/s
Sequential Write : 9.263 MB/s
Random Read 512KB : 19.252 MB/s
Random Write 512KB : 4.731 MB/s
Random Read 4KB (QD=1) : 3.147 MB/s [ 768.3 IOPS]
Random Write 4KB (QD=1) : 1.157 MB/s [ 282.4 IOPS]
Random Read 4KB (QD=32) : 3.408 MB/s [ 832.1 IOPS]
Random Write 4KB (QD=32) : 1.200 MB/s [ 293.0 IOPS]

Test : 50 MB [M: 0.0% (0.0/59.5 GB)] (x5)
Date : 2012/04/27 19:40:37
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

NOTE: tests were performed using an older Sandisk SD-113 reader that came with one of my older uSD cards, but the adapter that came with the uSDXC card.
 
Last edited:

flatulatorx

New member
Mar 5, 2012
3
1
my 2nd Samsung uSD class 10

Similar performance to my 1st card (post #331) :D. Bought from a different ebay seller from Korea. Tested under same conditions -- straight out of the retail pkg and in a Sandisk Extreme Pro SDXC expresscard reader.

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : crystalmark.xxx
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.437 MB/s
Sequential Write : 12.122 MB/s
Random Read 512KB : 23.038 MB/s
Random Write 512KB : 11.937 MB/s
Random Read 4KB (QD=1) : 7.231 MB/s [ 1765.5 IOPS]
Random Write 4KB (QD=1) : 1.252 MB/s [ 305.6 IOPS]
Random Read 4KB (QD=32) : 8.048 MB/s [ 1964.8 IOPS]
Random Write 4KB (QD=32) : 1.281 MB/s [ 312.8 IOPS]

Test : 50 MB [M: 0.0% (0.0/29.2 GB)] (x5)
Date : 2012/05/02 16:26:46
OS : Windows 7 SP1 [6.1 Build 7601] (x64)
Samsung uSD 32GB class10 (Korea) card#2 May'12
 
Last edited:

Dave_001

Member
Apr 9, 2012
6
1
I tested both my 16gb cards today, using Windows 7 with the card in the phone, then in a USB reader, and Windows XP with the card in the phone, then in a USB reader, I used the 32 bit version of CrystalDiskmark (5/50) for all tests.

I got different results with each setup.
 

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  • 34
    1/16/2012 update: Thanks to waxhell for compiling all of the results in this thread (at least as of mid-december! OK, so I took a while to get this posted...)
    https://docs.google.com/spreadsheet/ccc?key=0AjPE3ZAD2eVudE9vZmQ3aHlfTkFvU2J4ZUplRDJQTEE

    5/20 update: SD card performance benchmark table by a.fenderson from later in this thread added at the bottom of this post. Thank you a.fenderson!
    ------------------
    April minor update with a Transcend SD (see http://forum.xda-developers.com/showpost.php?p=12964262&postcount=8)

    _________________________________________________

    Let me tell you my story.

    Over the last couple of months as I have mucked around with SD booting various flavors of froyo and, more recently, CM7, I have found it maddening that there are apparently so many people that LOVE those versions, even people that seemed to have the same SD card as the two I've tried.

    One of those is a Class 10 Patriot 8gig, which I've seen mentioned as an acceptable boot disk.
    The other is a Kingston Class 4 4gig that tests out as significantly slower than the Patriot, but didn't really run froyo any slower.

    Now I know I've seen posts that mention small block write speed as being important, but the numbers I've seen posted really didn't make me think the Patriot was the cause...
    ...the cause of FRUSTRATINGLY slow UI, where froyo (and CM7) seem to go off into lala-land for a few seconds every time I (tried to) do something.
    ...the cause of glacial web-surfing, where even downloading GOOGLEforchrissake takes forever. Of snail's-pace market downloads. Oh god.

    Every time I would give up and go back to Eclair and breath a sigh of relief, reveling in the snappiness, the zippy web-surfing, the rapid response of m.pornhub.com.

    And every time the siren song of the CM7-elite would call me back. THIS time I did something different. I saw mention that a Class 2, YES A FREAKING CLASS 2, Sandisk from costco worked well. So I skippity-skopped up and bought one.

    After backing up the Patriot and writing THAT VERY SAME img to the Sandisk (which, yes, took 3 times as long as writing to the Patriot), I booted CM7.

    OMG

    The heavens opened and the angels sang, I HAD ARRIVED IN THE PROMISED LAND!
    NOW I knew what the chosen had been praising! NOW I knew the joy that is CM7! ZIP-ZIP-ZIPPITY!

    HOLY CRAP?! How could a benchmark be so misleading? I HATE those bastard SD manufacturers, or maybe it's the industry group that chose such a sucky measure of speed.

    For your edification, here are some CrystalDiskMark (5 iterations, 50MB) results from 2 sucky cards and the good Sandisk.


    __Test_________________Sandisk 8G Class 2___Patriot 8G Class 10____Kingston Class4 4Gig
    Sequential Read :__________10.871 MB/s________20.036 MB/s___________18.700 MB/s
    Sequential Write :__________6.659 MB/s________13.660 MB/s____________4.277 MB/s
    Random Read 4KB (QD=32) :___3.077 MB/s_________3.444 MB/s____________2.088 MB/s
    Random Write 4KB (QD=32) :__1.791 MB/s________0.038 MB/s_____________0.016 MB/s


    Look at that, both the Kingston and the Patriot blow away or are close enough to the Sandisk in everything BUT....

    (wait for it)....

    SMALL BLOCK RANDOM WRITES
    where the Sandisk is FIFTY times the speed of the Patriot and ONE HUNDREDtimes the Kingston.

    Now you may say, "Swizzlenuts, old pal, I KNEW that."

    But for all you poor slobs who didn't, who are dragging yer sorry ass through the broken glass that is booting off of a slow SD (you know who both of you are), I hope this helps.

    And now you may commence posting links to specific posts where this info was discussed in detail last December.


    ------------------
    Thanks to all of the people that posted their results and to a.fenderson for compiling them. Here's his table from http://forum.xda-developers.com/showpost.php?p=13991898&postcount=144
    Code:
    POSTER         BRAND      CLASS  CAPACITY  4 KB RANDOM
                                      (GB)    WRITE QD32(MB/s)    NOTE
    swoozle        SanDisk        2    8          1.791           Model: SDSQ-8192-AC11M
    a.fenderson    SanDisk        4    16         1.660           SanDisk C4 16GB 1 of 2 cards
    MickMcGeough   SanDisk        4    8          1.59            benchmarked in XBench, QD unknown
    a.fenderson    SanDisk        4    16         1.500           SanDisk C4 16GB 2 of 2 cards
    Awats          SanDisk        4    16         1.391           SanDisk C4 16GB 1 of 2 cards ; fastest (onboard) reader
    arwild01       SanDisk        4    8          1.369    
    Awats          SanDisk        4    16         1.284           SanDisk C4 16GB 2 of 2 cards ; fastest (onboard) reader
    robot8         SanDisk        4    8          1.270           SanDisk C4 8GB 2 of 2 cards
    robot8         SanDisk        4    8          1.259           SanDisk C4 8GB 1 of 2 cards
    chinly43       SanDisk        4    16         1.257           (not via Nook) ; same card as chinly43's other listed SanDisk C4 16GB
    joobu          SanDisk        4    4          1.175    
    angomy         Nook internal  N/A N/A         1.116           via Nook on USB
    chinly43       Nook internal  N/A N/A         1.094           via Nook on USB
    a.fenderson    Transcend      2    32         1.032    
    a.fenderson    SanDisk        4    4          0.898    
    a.fenderson    SanDisk        2    4          0.891    
    pchoi94        SanDisk        4    16         0.834    
    chinly43       SanDisk        4    16         0.769           via Nook on USB ; same as chinly43's other listed SanDisk C4 16GB
    pryonix        SanDisk        4    8          0.625    
    chinly43       SanDisk        2    8          0.616    
    a.fenderson    SanDisk        4    8          0.596    
    angomy         SanDisk        4    16         0.574    
    Blue6IX        SanDisk        2    16         0.350    
    a.fenderson    SanDisk       N/A   2          0.269    
    Awats          SanDisk        4    2          0.261           SanDisk C4 2GB 1 of 2 cards ; fastest (onboard) reader
    Awats          SanDisk        4    2          0.236           SanDisk C4 2GB 2 of 2 cards ; fastest (onboard) reader
    pryonix        Samsung       N/a   2          0.093    
    victle         Kingston      N/A   2          0.051    
    victle         Dane-Elec     N/A   2          0.050           0.050 or less:  exact value unspecified
    joobu          Lexar          4    8          0.038    
    swoozle        Patriot        10   8          0.038    
    Blue6IX        Dane-Elec      4    4          0.037           (made in Japan)
    omghahalol     Transcend      6    16         0.037    
    Ravynmagi      Samsung(??)    2    4          0.037    
    pryonix        Kingmax        10   16         0.036    
    Ravynmagi      Wintech        10   16         0.036    
    victle         Transcend      6    4          0.034    
    omghahalol     Transcend      6    8          0.033    
    Ravynmagi      SanDisk        2    8          0.033    
    pryonix        Transcend      6    8          0.033    
    Ravynmagi      Patriot        10   16         0.030    
    Blue6IX        PNY            10   8          0.030    
    pchoi94        Kingston       2    16         0.030    
    swoozle        Transcend      6    8          0.029           Model: TS8GUSDHC6
    joobu          ??            N/A   2          0.029    
    chinly43       SanDisk       N/A   1          0.029    
    a.fenderson    SanDisk       N/A   1          0.028    
    victle         PNY            4    8          0.028    
    Blue6IX        PNY           N/A   2          0.027           (made in Taiwan)
    omghahalol     SanDisk        2    2          0.021    
    MickMcGeough   SanDisk        2    8          0.02           benchmarked in XBench, QD unknown
    robot8         Transcend      6    8          0.018           Transcend C6 8GB 1 of 2 cards
    ExploreMN      Patriot        10   16         0.018    
    arwild01       Samsung(??)    4    8          0.017    
    swoozle        Kingston       4    4          0.016           Model: SDC4/8GB
    Awats          Patriot        4    4          0.016           Patriot C4 4GB 1 of 2 cards ; fastest (onboard) reader
    robot8         Transcend      6    8          0.014           Transcend C6 8GB 2 of 2 cards
    Tnexus         Patriot        10   16         0.014    
    a.fenderson    Kingston       4    8          0.014    
    Awats          Patriot        4    4          0.011           Patriot C4 4GB 2 of 2 cards ; fastest (onboard) reader
    chinly43       Lexar          4    8          0.011
    6
    This thread should be pinned: specifically the list of cards and their bench results. I was amazed at what a difference changing my SD card made.

    I fear swoozle (the OP) may have abandoned us, but if not or if an admin who wants to sticky this thread could do so, I'd be glad for someone to copy and paste the list I keep updating to the end of the first post. Speaking of that:

    Code:
    POSTER		BRAND		CLASS	CAPACITY (GB)	4 KB RANDOM WRITE QD32 (MB/s)	NOTE
    swoozle		SanDisk		2	8		1.791	
    a.fenderson	SanDisk		4	16		1.660				SanDisk C4 16GB 1 of 2 cards
    MickMcGeough	SanDisk		4	8		1.59				benchmarked in XBench, QD unknown
    a.fenderson	SanDisk		4	16		1.500				SanDisk C4 16GB 2 of 2 cards
    Awats		SanDisk		4	16		1.391				SanDisk C4 16GB 1 of 2 cards ; fastest (onboard) reader
    arwild01	SanDisk		4	8		1.369	
    Awats		SanDisk		4	16		1.284				SanDisk C4 16GB 2 of 2 cards ; fastest (onboard) reader
    robot8		SanDisk		4	8		1.270				SanDisk C4 8GB 2 of 2 cards
    robot8		SanDisk		4	8		1.259				SanDisk C4 8GB 1 of 2 cards
    chinly43	SanDisk		4	16		1.257				(not via Nook) ; same card as chinly43's other listed SanDisk C4 16GB
    joobu		SanDisk		4	4		1.175	
    angomy		Nook internal	N/A	N/A		1.116				via Nook on USB
    chinly43	Nook internal	N/A	N/A		1.094				via Nook on USB
    a.fenderson	Transcend	2	32		1.032		
    a.fenderson	SanDisk		4	4		0.898	
    a.fenderson	SanDisk		2	4		0.891	
    pchoi94		SanDisk		4	16		0.834	
    chinly43	SanDisk		4	16		0.769				via Nook on USB ; same as chinly43's other listed SanDisk C4 16GB
    pryonix		SanDisk		4	8		0.625	
    chinly43	SanDisk		2	8		0.616	
    a.fenderson	SanDisk		4	8		0.596	
    angomy		SanDisk		4	16		0.574	
    Blue6IX		SanDisk		2	16		0.350	
    a.fenderson	SanDisk		N/A	2		0.269	
    Awats		SanDisk		4	2		0.261				SanDisk C4 2GB 1 of 2 cards ; fastest (onboard) reader
    Awats		SanDisk		4	2		0.236				SanDisk C4 2GB 2 of 2 cards ; fastest (onboard) reader
    pryonix		Samsung		N/a	2		0.093	
    victle		Kingston	N/A	2		0.051	
    victle		Dane-Elec	N/A	2		0.050				0.050 or less:  exact value unspecified
    joobu		Lexar		4	8		0.038	
    swoozle		Patriot		10	8		0.038	
    Blue6IX		Dane-Elec	4	4		0.037				(made in Japan)
    omghahalol 	Transcend	6	16		0.037	
    Ravynmagi	Samsung(??)	2	4		0.037	
    pryonix		Kingmax		10	16		0.036	
    Ravynmagi	Wintech		10	16		0.036	
    victle		Transcend	6	4		0.034	
    omghahalol 	Transcend	6	8		0.033	
    Ravynmagi	SanDisk		2	8		0.033	
    pryonix		Transcend	6	8		0.033	
    Ravynmagi	Patriot		10	16		0.030	
    Blue6IX		PNY		10	8		0.030	
    pchoi94		Kingston	2	16		0.030	
    swoozle		Transcend	6	8		0.029	
    joobu		??		N/A	2		0.029	
    chinly43	SanDisk		N/A	1		0.029	
    a.fenderson	SanDisk		N/A	1		0.028	
    victle		PNY		4	8		0.028	
    Blue6IX		PNY		N/A	2		0.027				(made in Taiwan)
    omghahalol 	SanDisk		2	2		0.021	
    MickMcGeough	SanDisk		2	8		0.02				benchmarked in XBench, QD unknown
    robot8		Transcend	6	8		0.018				Transcend C6 8GB 1 of 2 cards
    ExploreMN	Patriot		10	16		0.018	
    arwild01	Samsung(??)	4	8		0.017	
    swoozle		Kingston	4	4		0.016	
    Awats		Patriot		4	4		0.016				Patriot C4 4GB 1 of 2 cards ; fastest (onboard) reader
    robot8		Transcend	6	8		0.014				Transcend C6 8GB 2 of 2 cards
    Tnexus		Patriot		10	16		0.014	
    a.fenderson	Kingston	4	8		0.014	
    Awats		Patriot		4	4		0.011				Patriot C4 4GB 2 of 2 cards ; fastest (onboard) reader
    chinly43	Lexar		4	8		0.011
    4
    Hi,

    I'm getting my nook next week, and I'm trying to pick an SD for it. I initially wanted an 8GB Class 6 Adata, but they're quite difficult to get a hold of in the UK.

    I'm torn between a SanDisk Class 4 and a Samsung Class 6. Both are 8GB.

    Anyone got any experience with Samsung or should I still to the tried and tested SanDisk?

    edit: I managed to find somewhere with a Class 6 Adata, so that's still an option.

    Any advice would be much appreciated.

    Will you be running your Android install off the SD card, or just using it for data?
    If just data, you'll be fine for most applications.

    I benchmarked several brand-new SanDisk cards of varying capacities, and all the >= 4 GB cards were Class 4, but even so it was hit-or-miss: random 4K writes for the 1 and 2 GB cards sucked, the 4 GB card was decent, the 8 GB card was half as fast as the 4 GB, one of the 16 GB cards looked great, and the other had kind of inconsistent results. So even within the same brand (and class rating where applicable), there is a lot of variation, unfortunately. You might look below and narrow your purchasing options down to those combinations of brand, size, and Class whose 4K random writes are shown to be around 1.00 MB/s or better, though really there are two orders of magnitude difference between the truly crappy cards and the best ones, so even cards with 0.1 to 0.9 MB/s 4K random writes might suffice when compared to the 0.0X cards. In general, so far it looks like SanDisk Class 4 and 2 vary between good (~.5 MB/s) and excellent (~1.5 MB/s), though unclassed SanDisk aren't so great.

    If running CM7 (etc) off it, my best advice is to test whatever card(s) you do end up buying with CrystalDiskMark and only using it as your boot disk if the 4K random writes are approximately equal to or greater than 1.00 MB/s.

    @all: the anecdotal reports of your cards running well are great, but if you have the time, please benchmark your cards with CrystalDiskMark so that we can all get enough data to be more confident in our card purchases. If you're worried about AV warnings when you download, please see this post where I explained what the opencandy component of the installer does and does not do (it's not malware). Also, along with your benchmarks, please provide your evaluation of how well the card runs your ROM, etc, if applicable.

    Here's a compilation of the actual benchmarking data thus far in this thread (with the only benchmakred data presented as 4 KB random write w/ QD=32, since this is the only commonality among all posters). It's been sorted (descending) on the write speed column:

    Code:
    POSTER		BRAND		CLASS	CAPACITY (GB)	4 KB RANDOM WRITE QD32 (MB/s)
    swoozle		SanDisk		2	8		1.791
    a.fenderson	SanDisk		4	16		1.660
    a.fenderson	SanDisk		4	16		1.500
    robot8		SanDisk		4	8		1.259
    chinly43	SanDisk		4	16		1.257
    joobu		SanDisk		4	4		1.175
    angomy		Nook internal	N/A	N/A		1.116
    a.fenderson	Transcend	2	32		1.032
    a.fenderson	SanDisk		4	4		0.898
    chinly43	SanDisk		2	8		0.616
    a.fenderson	SanDisk		4	8		0.596
    angomy		SanDisk		4	16		0.574
    a.fenderson	SanDisk		N/A	2		0.269
    swoozle		Patroit		10	8		0.038
    joobu		Lexar		4	8		0.038
    swoozle		Transcend	6	8		0.029
    joobu		??		N/A	2		0.029
    chinly43	SanDisk		N/A	1		0.029
    a.fenderson	SanDisk		N/A	1		0.028
    robot8		Transcend	6	8		0.018
    ExploreMN	Patroit		10	16		0.018
    swoozle		Kingston	4	4		0.016
    Tnexus		Patroit		10	16		0.014
    a.fenderson	Kingston	4	8		0.014
    chinly43	Lexar		4	8		0.011
    2
    Thanks a lot for clarifying, I will try it out now that I know I can opt out of the install.

    Edit: Ran CrystalDiskMark for 16GB class 4 Sandisk card vs internal nook storage via USB storage mode:

    Sandisk 16GB class 4 (non-Ultra+)

    Sequential Read : 20.003 MB/s
    Sequential Write : 3.086 MB/s
    Random Read 512KB : 20.113 MB/s
    Random Write 512KB : 1.372 MB/s
    Random Read 4KB (QD=1) : 5.143 MB/s [ 1255.7 IOPS]
    Random Write 4KB (QD=1) : 0.594 MB/s [ 145.1 IOPS]
    Random Read 4KB (QD=32) : 6.019 MB/s [ 1469.4 IOPS]
    Random Write 4KB (QD=32) : 0.574 MB/s [ 140.1 IOPS]


    Nook internal:

    Sequential Read : 19.970 MB/s
    Sequential Write : 3.937 MB/s
    Random Read 512KB : 20.634 MB/s
    Random Write 512KB : 2.173 MB/s
    Random Read 4KB (QD=1) : 4.905 MB/s [ 1197.5 IOPS]
    Random Write 4KB (QD=1) : 1.106 MB/s [ 270.0 IOPS]
    Random Read 4KB (QD=32) : 4.446 MB/s [ 1085.4 IOPS]
    Random Write 4KB (QD=32) : 1.116 MB/s [ 272.4 IOPS]
    2
    Update:Transcend

    Just a minor addition with a Transcend card. I'd seen many posts that swore by a Transcend Cl 6 8G card through Newegg. I ordered, received, benchmarked and loaded CM7 Nightly 37.
    To cut to the chase, the Transcend sucked big hairy monkey balls. Similar small block write speeds as the other crappy cards. And the CM7 performance was predictably bad. Crappy UI response and FCs.

    __Test_________Sandisk Cl2 8G___Patriot CL10 8G____Kingston Cl4 4Gig___Transcend Cl6 8G
    Sequential Read___10.871 MB/s____20.036 MB/s___________18.700 MB/s___________19.930 MB/s
    Sequential Write___6.659 MB/s____13.660 MB/s____________4.277 MB/s___________19.325 MB/s
    Rndm Rd 4KB(QD32)__3.077 MB/s_____3.444 MB/s____________2.088 MB/s___________2.968 MB/s
    Rndm Wrt 4KB(QD32)_1.791 MB/s_____0.038 MB/s____________0.016 MB/s___________0.029 MB/s

    I'm sure any of these would work fine as data cards. But for running off of SD, it makes a huge difference.