Sd card performance test

SD card performance test

Tests can be executed using iozone:

apt-get install iozone3

An example use of iozone:

iozone -e -a -s 4g -r 16M -i 0 -i 1

-s 4g - file size = 4GB
-r 16m - record size = 16MB (maximum)
-i 0 - write/rewrite test
-i 1 - read/reread test

In order to receive valid results (especially in read tests) file size needs to be big enough. For APU2 it was 4GB. This value can vary, depending on platform. It is related to system buffer.