maemo.org - Talk - View Single Post - SD card maximum speed?

N770-Freak	2007-01-18 , 09:04
Posts: 209 \| Thanked: 31 times \| Joined on Oct 2006	#6

Originally Posted by Riff-Raff

Thanks for testing.
When using 64M file most (or at least some) of it are probably still in cache when copy finishes. I wonder if there is any good way to bypass caching for testing purposes.

You could use the following command before you start your time measurement and after copy!

Code:

sync

sync will write the cache to your mmc (in this case).
So you could try something like this (untested! probably you will need bash):

Code:

sync; time ( dd if=/dev/zero of=/media/mmc1/64m bs=1024 count=65536; sync )

or you use this command with the build in shell (also untested):

Code:

sync; time dd if=/dev/zero of=/media/mmc1/64m bs=1024 count=65536; time sync

Then you will have to sum up the two time results!

Last edited by N770-Freak; 2007-01-18 at 09:10.

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