Thanks for the tip. The fourth field does not get interpreted by fio. But fio requires it there as all the commands must comply the 4-field format style. On Tue, Apr 7, 2015 at 1:33 PM, Alireza Haghdoost <haghdoost@xxxxxxxxx> wrote: > Not sure what does 512 means in your wait statements. I would also > recommend to use blktrace+btrecord+btreplay to replay block I/O > workloads on a single HDD. That is more accurate replay method and > tested by the community. > > Good luck with your experiments. > > On Tue, Apr 7, 2015 at 11:46 AM, Mansour Shafaei Moghaddam > <mansoor.shafaei@xxxxxxxxx> wrote: >> Thanks for the response But I am pretty sure about the functionality >> of wait command. The device is a conventional magnetic disk. >> >> On Tue, Apr 7, 2015 at 12:39 PM, Alireza Haghdoost <haghdoost@xxxxxxxxx> wrote: >>> Sounds like your wait statements are not correct. Referring to HOWTO.txt : >>> >>> wait Wait for 'offset' microseconds. Everything below 100 is >>> discarded. >>> >>> >>> What kind of storage device do you have under /dev/sdb ? >>> >>> -- 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