====== Test SD Card Read/Write Speed ======

===== Write Speed =====

Test the write speed of the SD card by writing 1 GB of data in 10 blocks of 100 MB:

<code bash>
dd if=/dev/zero of=./TestingFile bs=100M count=10 oflag=direct
</code>

===== Read Speed =====

Test the read speed of the SD card by using ''dd'' to read the entire TestingFile file generated from the last command, in 10 blocks of 100 MB each:

<code bash>
dd if=./TestingFile of=/dev/zero bs=100M count=10 oflag=dsync
</code>

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Source article: https://linuxconfig.org/how-to-test-sd-card-speed-on-raspberry-pi