# The most basic form of data verification. Write the device randomly # in 4K chunks, then read it back and verify the contents. [write-and-verify] rw=randwrite bs=4k direct=1 ioengine=libaio iodepth=16 verify=crc32c # Use /dev/XXX. For running this on a file instead, remove the filename # option and add a size=32G (or whatever file size you want) instead. filename=/dev/XXX