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Re: MicroSD benchmark

Results for vanilla Nokia 2GB card (from my old E71) using short script:

Read: 8.25764 MB/s
Write: 6.58328 MB/s

Re: MicroSD benchmark

My result with short script:

Kingston microSDHC 16GB Class 4

Read: 5.20291 MB/s
Write: 8.31255 MB/s

The slower Read I've seen around :(
I'm trying to decide if Buying Class 6 or Class 10, but I'm not convinced at all...

Re: MicroSD benchmark

Quote:

Originally Posted by akih (Post 861795)

I am create a MicroSD read/write speed benchmark script.

Simple shell script
No require additional software (busybox command only)
Create 1GB file on MicroSD

sdbench.sh

Code:

#!/bin/sh



MMC="/media/mmc1"

DAT="$MMC/test.dat"

CNT=1024

SDREAD=""

SDWRITE=""



grep -q "$MMC" /etc/mtab

if [ $? == 0 ];

then

  echo "testing SD Card read/write speed. Please wait a few minutes."

  # Write test

  SDWRITE=`time -p dd if=/dev/zero of=$DAT bs=1M count=$CNT 2>&1|head -3|tail -1`

  # Read test

  SDREAD=`time -p cp $DAT /dev/null 2>&1|head -1`

  # Delete data file

  rm $DAT



  echo

  echo "Result"

  echo $SDREAD | awk '{print "Read:", 1024/$2, "MB/s"}'

  echo $SDWRITE | awk '{print "Write:", 1024/$2, "MB/s"}'

else

  echo "SD Card not found."

fi

usage:

1. Copy sdbench.sh to home directory
2. Open X-Terminal
3. Run script (eg. sh sdbench.sh)
4. wait a few minute

My result
SanDisc Class2 16GB
Read: 14.5952 MB/s
Write: 8.53831 MB/s

Buffalo Class4 8GB
Read: 13.4031 MB/s
Write: 4.84413 MB/s

How is it that your class 2 is faster than class 4 ?

Re: MicroSD benchmark

Sandisk is good :-)

Anyway, the class rating is a very specific measurement of /minimum/ speed in one very specific use, that resembles the kinda of load a card would see in a simple digital/video camera.

Your benchmarks are not measuring class rating, and neither class rating nor benchmarks measure how fast the card would perform for nitdroid or meego..

Actually it's probably impossible to determine the real proper class rating through benchmarks, it requires intimate knowledge of the internal structures and operation of the card in question, something only the manufacturer would know.

My own benchmarks of Sandisk, Kingston and Transcend cards have generally shown the sandisk class 2 as having an overall more consistent performance across a wide range of different type of loads, while class 6 kingston and transcend have beaten sandisk class 2 only in the sequential write/read patterns..

Re: MicroSD benchmark

@one1002 - Since this thread has been bumped, I had another go, and following your instruction, I finally got it to work - After 15 minutes! The only card which I had enough space on for the test to be able to run, was a sandisk class 2. This is obviously why it took a long time, but 15 minutes.

Seems to me like a very long time to read and write, then delete just 1GB, but hey, got it to work, so thanks for your help and also thanks to akih for the script.

Re: MicroSD benchmark

I know it really depends on what you want to test, but personally I prefer to divide speed tests to raw media speed and file system performance. For raw media speed read/write speed I use dd to read/write the media directly (e.g. dd if=random.static of=/dev/foo bs=1M). For file system performance, I've found bonnie++ to be sufficient. If you want to compile bonnie++ as a Debian package, just grab the sources from unstable; it should compile nicely for Maemo (at least for Diablo) as well.

Re: MicroSD benchmark

hello, please can you make a script for microSD detection issue?? I'm having problems with detection, mem card is ok I tried three, i converted the file system to ext2 as w2el but nit even dmesg shows anything... please help me

Re: MicroSD benchmark

Result
Read: 12,5 MB/s
Write: 10 MB/s

Sandisk Premier 8GB from 2007. No Idea what class but they were the fastest cards on the market back then. Had lots of windows open when I ran the test. Might be faster right after boot.

Re: MicroSD benchmark

None of the scripts work for me.

He throws an error when using /dev /null.

The message reads:

Code:

cp: write error: No space left on device



Result:

Read: awk: cmd. line: 1: Division by zero

Write: awk: cmd. line: 1: Division by zero

I tried to test directly from the terminal and gives the same error. As much as "user" as "root"

I am testing a microSD 32GB Class 10 Lexor.