-----Original Message----- From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On Behalf Of Jens Axboe Sent: Monday, September 29, 2014 4:00 PM To: Jon Tango; fio@xxxxxxxxxxxxxxx Subject: Re: Limit LBA Range On 2014-09-29 14:46, Jon Tango wrote: > Thanks for the reply. the capacity of the SSD is 850GB, but I am > trying to run the workload continuously between 0 and 745GB of the > capacity. I would like to workload to be time based so that it > continues to run, even if more than 745 GB of data is written, but > still within that same range. Is there a method of continuing to run > the workload from 0 to 745GB, even if more than 745GB is written? (please don't top post) Sure, if you want it to run for 4h within that range, just do: runtime=4h timed_based -- Jens Axboe -- 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 I include both of those commands, in addition to size=745g, and it seems to be conducting the workload over the entire LBA range. Is this the correct combination of the three parameters? Here is the test script: [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