; writes 512 byte verification blocks until the disk is full, ; then verifies written data [global] thread=1 bs=64k direct=1 ioengine=sync verify=meta verify_pattern=0xaa555aa5 verify_interval=512 [write-phase] filename=datafile.tmp ; or use a full disk, for example /dev/sda rw=write fill_device=1 do_verify=0 [verify-phase] stonewall create_serialize=0 filename=datafile.tmp rw=read do_verify=1