> Try and delete the output files and re-run it. Ok, but got the same result. Here is the output. matt@matt-work:~/fiogit/fio$ rm -r ~/temp/* matt@matt-work:~/fiogit/fio$ ls -l ~/temp total 0 matt@matt-work:~/fiogit/fio$ ./fio ~/fio.job job: (g=0): rw=write, bs=1M-1M/1M-1M/1M-1M, ioengine=sync, iodepth=1 fio-2.1.4-51-geb0c7 Starting 1 process job: Laying out IO file(s) (50 file(s) / 1023MB) Jobs: 1 (f=10) job: (groupid=0, jobs=1): err= 0: pid=18777: Tue Feb 11 13:37:19 2014 write: io=1000.0MB, bw=562947KB/s, iops=549, runt= 1819msec clat (usec): min=331, max=18299, avg=1790.14, stdev=3952.06 lat (usec): min=342, max=18310, avg=1804.84, stdev=3952.43 clat percentiles (usec): | 1.00th=[ 338], 5.00th=[ 346], 10.00th=[ 354], 20.00th=[ 374], | 30.00th=[ 398], 40.00th=[ 434], 50.00th=[ 442], 60.00th=[ 482], | 70.00th=[ 644], 80.00th=[ 660], 90.00th=[ 9408], 95.00th=[13632], | 99.00th=[16512], 99.50th=[17792], 99.90th=[18048], 99.95th=[18304], | 99.99th=[18304] bw (KB /s): min=387072, max=1038307, per=100.00%, avg=606881.00, stdev=373648.33 lat (usec) : 500=61.20%, 750=28.70% lat (msec) : 10=0.20%, 20=9.90% cpu : usr=2.20%, sys=25.91%, ctx=261, majf=0, minf=33 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued : total=r=0/w=1000/d=0, short=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): WRITE: io=1000.0MB, aggrb=562946KB/s, minb=562946KB/s, maxb=562946KB/s, mint=1819msec, maxt=1819msec Disk stats (read/write): sda: ios=0/1005, merge=0/0, ticks=0/191632, in_queue=207380, util=83.30% -- 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