Leopold
Posts: 5
Joined: Fri Jul 05, 2013 4:07 am

Re: SD Card Benchmarks

Sun Jul 27, 2014 4:51 am

mikerr wrote:
flytomars wrote:Hi Leopold,
Sorry to say but your test has no meaning as you tested the card not in the pi,
And the pi does not support the benefits of class 10- meaning it would work with the pi, but not give the results you jus got.
True, the Pi can't take advantage of the sequential figures, but his 4K random read/write are the important figures for Pi use, and those are high too.
Leopold wrote:Just tested a new card and got some crazy good numbers...

Samsung 16GB Class 10 Grade 1 48MB/s Micro SDHC Plus (MB-MPAGCAEU)
...
Random Write 4KB (QD=32) : 3.591 MB/s [ 876.8 IOPS]
Unfortunately this card seems to be incompatible with the Pi. I got filesystem corruption and boot failure on my B+.
It should be great in a tablet or smartphone though.

User avatar
Jessie
Posts: 1754
Joined: Fri Nov 04, 2011 7:40 pm
Location: C/S CO USA

Re: SD Card Benchmarks

Thu Jul 31, 2014 9:45 pm

Just figured I would post benchmarks I just did on my core i5 PC. First is the one that covers the topic here, an SD card I bought specifically for my B+. Cost was $8 on amazon, sold and delivered by Amazon.
Samsung Bench.JPG
Samsung Bench.JPG (39.94 KiB) Viewed 8540 times
The rest I have just copied text from the tests. First a Kingston Datatravler 100 G3 USB 3.0 drive tested in a 3.0 port and 2.0 Port. I have never used this one with any Pi other than to transfer files to devices with no internet connection.

Code: Select all

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    42.487 MB/s
          Sequential Write :    15.294 MB/s
         Random Read 512KB :    40.538 MB/s
        Random Write 512KB :    10.561 MB/s
    Random Read 4KB (QD=1) :     6.769 MB/s [  1652.5 IOPS]
   Random Write 4KB (QD=1) :     1.645 MB/s [   401.6 IOPS]
   Random Read 4KB (QD=32) :     8.443 MB/s [  2061.3 IOPS]
  Random Write 4KB (QD=32) :     1.178 MB/s [   287.6 IOPS]

  Test : 50 MB [D: 7.7% (2.2/29.0 GB)] (x1)
  Date : 2014/07/31 14:53:13
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Kingston Datatravler 100 G3 USB 3.0 Port



-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    34.836 MB/s
          Sequential Write :    13.380 MB/s
         Random Read 512KB :    34.106 MB/s
        Random Write 512KB :     7.805 MB/s
    Random Read 4KB (QD=1) :     5.170 MB/s [  1262.1 IOPS]
   Random Write 4KB (QD=1) :     1.235 MB/s [   301.6 IOPS]
   Random Read 4KB (QD=32) :     5.650 MB/s [  1379.4 IOPS]
  Random Write 4KB (QD=32) :     1.437 MB/s [   350.9 IOPS]

  Test : 50 MB [D: 7.7% (2.2/29.0 GB)] (x1)
  Date : 2014/07/31 14:57:57
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Kingston Dtatatravler 100 G3 USB 2.0 Port
This final drive is a Sandisk Cruiser 8G USB 2.0. I have used this drive several times as R Pi root filesystem. It feels snappy in use but the writes look real bad on it.

Code: Select all

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    20.504 MB/s
          Sequential Write :     2.908 MB/s
         Random Read 512KB :    20.809 MB/s
        Random Write 512KB :     1.703 MB/s
    Random Read 4KB (QD=1) :     5.621 MB/s [  1372.3 IOPS]
   Random Write 4KB (QD=1) :     0.256 MB/s [    62.4 IOPS]
   Random Read 4KB (QD=32) :     5.160 MB/s [  1259.8 IOPS]
  Random Write 4KB (QD=32) :     0.186 MB/s [    45.5 IOPS]

  Test : 50 MB [E: 0.0% (0.0/7616.0 MB)] (x1)
  Date : 2014/07/31 15:31:39
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Sandisk Cruiser 8GB USB 2.0

warpigs12
Posts: 2
Joined: Tue Apr 15, 2014 2:24 pm

Re: SD Card Benchmarks

Thu Oct 23, 2014 5:43 pm

Sandisk 8GB Class 4

Image

Code: Select all

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    20.913 MB/s
          Sequential Write :     6.346 MB/s
         Random Read 512KB :    20.641 MB/s
        Random Write 512KB :     1.412 MB/s
    Random Read 4KB (QD=1) :     5.240 MB/s [  1279.4 IOPS]
   Random Write 4KB (QD=1) :     1.115 MB/s [   272.2 IOPS]
   Random Read 4KB (QD=32) :     5.206 MB/s [  1270.9 IOPS]
  Random Write 4KB (QD=32) :     0.983 MB/s [   240.0 IOPS]

  Test : 100 MB [E: 0.0% (0.0/127.7 MB)] (x5)
  Date : 2014/07/29 9:14:07
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
Captura de tela 2014-10-23 15.28.31.png
Captura de tela 2014-10-23 15.28.31.png (42.34 KiB) Viewed 7560 times
Last edited by warpigs12 on Fri Dec 19, 2014 3:38 pm, edited 2 times in total.

User avatar
Marty
Posts: 9
Joined: Sat Nov 22, 2014 7:39 pm

PNY 16GB microSD card

Sat Nov 22, 2014 8:10 pm

PNY 16GB microSDHC card, class 10,
MicroSDHC 16GB Android + SD adapter
product number: SDU-16G10AND-EF
EAN CODE: 3536401535430

Image

Code: Select all

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    19.676 MB/s
          Sequential Write :    10.436 MB/s
         Random Read 512KB :    19.391 MB/s
        Random Write 512KB :     7.069 MB/s
    Random Read 4KB (QD=1) :     3.387 MB/s [   826.8 IOPS]
   Random Write 4KB (QD=1) :     0.538 MB/s [   131.3 IOPS]
   Random Read 4KB (QD=32) :     4.019 MB/s [   981.1 IOPS]
  Random Write 4KB (QD=32) :     0.176 MB/s [    43.0 IOPS]

  Test : 50 MB [G: 0.0% (0.0/14.7 GB)] (x5)
  Date : 2014/11/22 20:33:32
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
5 Years warranty
Reliability:
•Operating temperature: -0°C to 60°C
•Non Operating: -40°C to 85°C
•Storage Humidity: 95% Max non condensing
•Shock:
1.000G MAX operating
14000G MAX non operating Storage temperature: -20°C to 85°C
•Number of insertions: 10,000 minimum
•Data retention: 10 years
•Write/erase cycles: 10,000 minimum

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sat Dec 27, 2014 4:35 pm

Jesse I see your samsung micro sd test.
it is very good... you think that this is one of the best card to have in our B+? or there is a better one?
I have to buy a 16gb...
thanks!

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Wed Dec 31, 2014 11:17 pm

SAMSUNG EVO UHS-1 UC-1 CL10 16GB Micro SD MBMPAGVDDBCW-B

MANFID: 0x1B OEMID: 0x534D Date: 09/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.486 MB/s
Sequential Write : 12.845 MB/s
Random Read 512KB : 23.053 MB/s
Random Write 512KB : 18.822 MB/s
Random Read 4KB (QD=1) : 7.233 MB/s [ 1765.8 IOPS]
Random Write 4KB (QD=1) : 2.976 MB/s [ 726.7 IOPS]
Random Read 4KB (QD=32) : 7.572 MB/s [ 1848.6 IOPS]
Random Write 4KB (QD=32) : 3.181 MB/s [ 776.6 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/19 23:17:19
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)

bought from this source: http://www.ebay.co.uk/itm/331205762700? ... EBIDX%3AIT

One I've bought from a portuguese store ( WORTEN ) had manfid: 0x1D and performed with half the speed on random access speeds of blocks less than 512KB.

All measurements taken on a SONY VPC-F11M1E laptop internal media card reader.

User avatar
Marty
Posts: 9
Joined: Sat Nov 22, 2014 7:39 pm

Re: SD Card Benchmarks

Sat Jan 10, 2015 2:02 pm

@guilhermino The SD-card-slot in the Pi is fixed at running at 3.3V, and isn't able to drop down to the 1.8V that UHS1 needs to work. So the Pi is always in non-UHS mode.

We should devise another speed test, preferably on the RPi itself to measure the card running at 3.3V in non-UHS mode in order to really know how it will perform on the RPi.

rickwookie
Posts: 23
Joined: Sat Mar 03, 2012 11:09 am

Re: SD Card Benchmarks

Fri Jan 16, 2015 2:07 pm

So, seeing the fast 4k speeds with the Samsung cards, I decided to do a comparison of the three options they do:

ImageImage
Standard card specs - Evo card specs - Pro card specs

These are my results (using a fast USB 3.0 card reader on my WIndows 7 desktop):
Image Image Image

Code: Select all

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    23.666 MB/s
          Sequential Write :     7.149 MB/s
         Random Read 512KB :    21.789 MB/s
        Random Write 512KB :     5.591 MB/s
    Random Read 4KB (QD=1) :     2.352 MB/s [   574.1 IOPS]
   Random Write 4KB (QD=1) :     1.245 MB/s [   303.8 IOPS]
   Random Read 4KB (QD=32) :     2.391 MB/s [   583.7 IOPS]
  Random Write 4KB (QD=32) :     1.220 MB/s [   297.7 IOPS]

  Test : 50 MB [K: 0.0% (0.0/7519.0 MB)] (x3)
  Date : 2015/01/16 12:24:44
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
    Samsung Standard 8 GB microSD

Time to write NOOBS files: 3m06s (windows reporting 6.24 MB/s at end of write)

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    46.624 MB/s
          Sequential Write :    16.063 MB/s
         Random Read 512KB :    39.732 MB/s
        Random Write 512KB :    25.542 MB/s
    Random Read 4KB (QD=1) :     2.449 MB/s [   597.9 IOPS]
   Random Write 4KB (QD=1) :     1.326 MB/s [   323.7 IOPS]
   Random Read 4KB (QD=32) :     2.448 MB/s [   597.7 IOPS]
  Random Write 4KB (QD=32) :     1.242 MB/s [   303.2 IOPS]

  Test : 50 MB [K: 0.0% (0.0/7535.0 MB)] (x3)
  Date : 2015/01/16 12:34:51
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
    Samsung Evo 8 GB microSD

Time to write NOOBS files: 1m30s (windows reporting 22.0 MB/s at end of write)

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    93.729 MB/s
          Sequential Write :    55.632 MB/s
         Random Read 512KB :    69.042 MB/s
        Random Write 512KB :    43.611 MB/s
    Random Read 4KB (QD=1) :     2.999 MB/s [   732.1 IOPS]
   Random Write 4KB (QD=1) :     1.689 MB/s [   412.3 IOPS]
   Random Read 4KB (QD=32) :     3.089 MB/s [   754.2 IOPS]
  Random Write 4KB (QD=32) :     1.367 MB/s [   333.8 IOPS]

  Test : 50 MB [K: 0.0% (0.0/14.9 GB)] (x3)
  Date : 2015/01/16 12:43:31
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
    Samsung Pro 16 GB microSD

Time to write NOOBS files: 27s (windows reporting 45.0 MB/s at end of write)
So, while the cards certainly meet their advertised speeds fro sequential reads, there's very little difference between them for the 4k speeds. Also, I'm not seeing this performance:
guilhermino wrote:SAMSUNG EVO UHS-1 UC-1 CL10 16GB Micro SD MBMPAGVDDBCW-B

MANFID: 0x1B OEMID: 0x534D Date: 09/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.486 MB/s
Sequential Write : 12.845 MB/s
Random Read 512KB : 23.053 MB/s
Random Write 512KB : 18.822 MB/s
Random Read 4KB (QD=1) : 7.233 MB/s [ 1765.8 IOPS]
Random Write 4KB (QD=1) : 2.976 MB/s [ 726.7 IOPS]
Random Read 4KB (QD=32) : 7.572 MB/s [ 1848.6 IOPS]
Random Write 4KB (QD=32) : 3.181 MB/s [ 776.6 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/19 23:17:19
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Interestingly though...
guilhermino wrote:One I've bought from a portuguese store ( WORTEN ) had manfid: 0x1D and performed with half the speed on random access speeds of blocks less than 512KB.
So are there some of these cards that are manufactured with double the 4k performance?! I bought mine here.

Clearly, while there's a clear difference between 3 mins vs 27 secs for the NOOBS write, that's a one-off operation really, so now I have fresh NOOBS on them all I can see if there's any measurable difference in actual use on the Pi.

UPDATE: Okay so booting them on the Pi into the NOOBS menu (1), then selecting to install Raspbian (from the card, not the online image) and letting it complete to the OK message (2), then rebooting to the Software Configuration Tool (rasbi-config) (3), then rebooting again (first boot after SCT to normal login) (4), then a final standard boot (this is then the normal boot going forward) (5), I get the following times for the Standard, Evo and Pro cards repectively:
1) 13.34 secs, 13.25 secs, 12.91 secs.
2) 11 mins 25 secs, 10 mins 4 secs, 9 mins 38 secs.
3) 36.26 secs, 36.55 secs, 35.21 secs.
4) 38.56 secs, 38.03 secs, 37.6 secs.
5) 38.16 secs, 37.72 secs, 36.25 secs.

So there you have it, between the Standard and the Pro card, you'll shave a couple of minutes off an install, and a couple of seconds off each boot. So the pro is maybe 5-10% faster in use.

It probably makes more sense therefore to keep these faster cards for your USB 3.0 readers on your PC/Notebook, where you'll see over 700% increase in sequential write speeds!

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Fri Jan 23, 2015 11:39 pm

I've exagerated ( quite ) a bit on saying double the speed but here are the numbers and some more details:

Full Size SD:


-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 21.266 MB/s
Sequential Write : 18.625 MB/s
Random Read 512KB : 21.167 MB/s
Random Write 512KB : 17.680 MB/s
Random Read 4KB (QD=1) : 8.051 MB/s [ 1965.5 IOPS]
Random Write 4KB (QD=1) : 3.188 MB/s [ 778.2 IOPS]
Random Read 4KB (QD=32) : 8.244 MB/s [ 2012.6 IOPS]
Random Write 4KB (QD=32) : 3.395 MB/s [ 829.0 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/14 16:55:12
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)


Erase Block Size: 8MB Write Unit: 32KB Page size: 8KB Open aus: 28

Algorithm: Random Write Unit






Micro SD Hong Kong MBMPAGVDDBCW-B:

MANFID: 0x1B OEMID: 0x534D Date: 09/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.486 MB/s
Sequential Write : 12.845 MB/s
Random Read 512KB : 23.053 MB/s
Random Write 512KB : 18.822 MB/s
Random Read 4KB (QD=1) : 7.233 MB/s [ 1765.8 IOPS]
Random Write 4KB (QD=1) : 2.976 MB/s [ 726.7 IOPS]
Random Read 4KB (QD=32) : 7.572 MB/s [ 1848.6 IOPS]
Random Write 4KB (QD=32) : 3.181 MB/s [ 776.6 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/19 23:17:19
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)


Micro SD Worten:

MANFID: 0x1D OEMID: 0x534D Date:10/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 23.663 MB/s
Sequential Write : 12.973 MB/s
Random Read 512KB : 21.842 MB/s
Random Write 512KB : 17.139 MB/s
Random Read 4KB (QD=1) : 4.859 MB/s [ 1186.4 IOPS]
Random Write 4KB (QD=1) : 1.598 MB/s [ 390.2 IOPS]
Random Read 4KB (QD=32) : 4.948 MB/s [ 1208.1 IOPS]
Random Write 4KB (QD=32) : 1.228 MB/s [ 299.7 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.9 GB)] (x5)
Date : 2014/12/18 19:03:14
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)

Erase Block Size: 8MB Write Unit: 32KB Page size: 8KB Open aus: 28

Algorithm: Random Write Unit

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Fri Jan 23, 2015 11:43 pm

By the way the SD card reader on my laptop is not UHS-1

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sat Jan 24, 2015 2:16 am

so where I have to buy the best one?

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sat Jan 24, 2015 3:52 pm

I think you should also all be aware of this: https://blogofterje.wordpress.com/2012/ ... on-sd-card

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sat Jan 24, 2015 6:49 pm

you prepare them with this guide before measure?

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sat Jan 24, 2015 11:14 pm

Unfortunately I can only show the benchmark before these optimizations were made since CristalDiskMark is a windows only program and I do not seem to be able to read the ext4 partition on windows ( even using the Ext2Fsd freeware program ) even though I could see the result of the optimizations on this Toshiba USB pen on which I did the same, with the following numbers:

USB-Toshiba-N723-D32210-8GB
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 22.982 MB/s
Sequential Write : 13.013 MB/s
Random Read 512KB : 22.546 MB/s
Random Write 512KB : 5.601 MB/s
Random Read 4KB (QD=1) : 3.206 MB/s [ 782.8 IOPS]
Random Write 4KB (QD=1) : 0.065 MB/s [ 15.9 IOPS]
Random Read 4KB (QD=32) : 4.219 MB/s [ 1030.1 IOPS]
Random Write 4KB (QD=32) : 0.105 MB/s [ 25.6 IOPS]

Test : 50 MB [K: 0.0% (0.0/7379.8 MB)] (x5)
Date : 2014/11/23 17:58:17
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)


8MB Erase Block - 512K Write Unit - 8KB page - 2 Open AUs

Algorithm: Random Write Unit


After Optimization:

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 20.039 MB/s
Sequential Write : 13.021 MB/s
Random Read 512KB : 22.179 MB/s
Random Write 512KB : 4.181 MB/s
Random Read 4KB (QD=1) : 3.603 MB/s [ 879.7 IOPS]
Random Write 4KB (QD=1) : 0.308 MB/s [ 75.2 IOPS]
Random Read 4KB (QD=32) : 4.762 MB/s [ 1162.6 IOPS]
Random Write 4KB (QD=32) : 0.239 MB/s [ 58.5 IOPS]

Test : 50 MB [K: 1.8% (132.3/7384.0 MB)] (x5)
Date : 2014/11/27 23:37:55
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)

I can only say though that the SD card I use now on my Raspberry Pi B+ System with these optimizations and though it is overclocked to 900MHz/250MHz/500Mhz ( ARM/Core/RAM frequencies ) showed an immense difference using the XBMC Media Center, and the only thing I changed before using this card was raising the RAM speed from 450 to 500MHz and decreasing the GPU memory from 192 to 160MB, but since then I've had no more hangups or slowdowns on XBMC and though I can't be sure it was solely these optimizations that made the difference I'm convinced it had a lot to do with the improvement.

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sat Jan 24, 2015 11:19 pm

I think that these improvements don't give much effect on normal write/read of raspberry that don't need to be used as xmbc... you think?
can you say me where you buy the best 16gb card? the one with the best performance?

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:17 am

My belief is that anything that uses a large database or any other process that reads and writes small chunks of data like, for example in data aquisition, will benefit from this, but I don't know for sure. In my case it certainly made a big difference. I bought this card on ebay. You can find the link on my first post.

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:23 am

this in the link of first post is the best one?

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:33 am

Yes, it is. But beware that it was a Hong Kong supplier and I can't guarantee they will all be the same batch. I think it may very well be a question of luck.

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:34 am

but it was genuine... ?

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:37 am

As far as I know yes.

platini76
Posts: 19
Joined: Sat Dec 27, 2014 4:27 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:39 am

thanks!

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 12:47 am

I think you should all be aware of this as well: http://www.raspberrypi.org/forums/viewt ... ?f=9&t=850

I just wouldn't bother with the disk geometry optimizations as I believe this is not used in modern systems as far as I know.

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Sun Jan 25, 2015 1:07 am


User avatar
Marty
Posts: 9
Joined: Sat Nov 22, 2014 7:39 pm

Samsung 16GB EVO microSDHC UHS-I Card

Sun Feb 08, 2015 7:05 pm

Test results for Samsung 16GB EVO microSDHC UHS-I Card
Model code: MB-MP16DA/EU
up to 48 MB/s Transfer speed with UHS-I
10 Year limited warrenty.
Clean out of the box it was pre-formatted with FAT32.

Image

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.245 MB/s
Sequential Write : 12.461 MB/s
Random Read 512KB : 18.962 MB/s
Random Write 512KB : 14.855 MB/s
Random Read 4KB (QD=1) : 3.306 MB/s [ 807.2 IOPS]
Random Write 4KB (QD=1) : 1.586 MB/s [ 387.3 IOPS]
Random Read 4KB (QD=32) : 3.588 MB/s [ 876.0 IOPS]
Random Write 4KB (QD=32) : 1.298 MB/s [ 316.9 IOPS]

Test : 50 MB [J: 0.0% (0.0/14.9 GB)] (x5) <0Fill>
Date : 2015/02/08 11:09:11
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)

===============================================
Interestingly enough after reformatting the card under Win7 I was never able to get the same performance back. The best performance that I manged to get was when formatting it:
fat32 with 16 kb cluster size.

Then I was only able to get the following performance from the card:

Image

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.646 MB/s
Sequential Write : 8.722 MB/s
Random Read 512KB : 19.382 MB/s
Random Write 512KB : 9.137 MB/s
Random Read 4KB (QD=1) : 3.195 MB/s [ 780.1 IOPS]
Random Write 4KB (QD=1) : 1.580 MB/s [ 385.9 IOPS]
Random Read 4KB (QD=32) : 3.813 MB/s [ 930.9 IOPS]
Random Write 4KB (QD=32) : 2.170 MB/s [ 529.9 IOPS]

Test : 50 MB [J: 0.0% (0.0/14.9 GB)] (x5) <0Fill>
Date : 2015/02/08 19:44:55
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)

guilhermino
Posts: 16
Joined: Wed Dec 31, 2014 11:05 pm

Re: SD Card Benchmarks

Mon Feb 09, 2015 11:34 pm

I think FAT location matters as well since it is optimized in many SD cards, not sure how you change that though, also did you try with a 32K cluster because that seems to be the native write-unit of this particular card ? Not sure if you could also try the page size of 8K.

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