I am using windows server 2012R2 and am attempting to limit the LBA range of the test. It doesn't seem to be working, I am using this, is it correct? [global] name=4ktest filename=\\.\physicaldrive1 direct=1 numjobs=8 norandommap ba=4k time_based size=745g log_avg_msec=100000 group_reporting=1 ######################################################### [4K Precon] stonewall runtime=15000 iodepth=32 bs=4k rw=randwrite -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html