PS C:\Users\callum.massey\Downloads> ./fio.exe --thread --filename=fiotmp --verify_pattern=0xdeadbeef --rw=write --verify=pattern --siz e=100m --stonewall --bs=1m --name=layout --do_verify=0 --name=trim --rw=trim --bs=512 --name=verify --verify_only=1 --unlink=1 layout: (g=0): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=windowsaio, iodepth=1 trim: (g=1): rw=trim, bs=(R) 512B-512B, (W) 512B-512B, (T) 512B-512B, ioengine=windowsaio, iodepth=1 verify: (g=2): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=windowsaio, iodepth=1 fio-3.5-94-g946f9-dirty Starting 3 threads layout: Laying out IO file (1 file / 100MiB) trim: Laying out IO file (1 file / 100MiB) verify: Laying out IO file (1 file / 100MiB) GetLastError=312 fio: io_u error on file fiotmp: Input/output error: trim offset=0, buflen=512 trim: No I/O performed by windowsaio, perhaps try --debug=io option for details? fio: pid=1116, err=5/file:io_u.c:1823, func=io_u error, error=Input/output error verify: No I/O performed by windowsaio, perhaps try --debug=io option for details? layout: (groupid=0, jobs=1): err= 0: pid=19860: Thu Apr 5 17:33:01 2018 write: IOPS=2272, BW=2273MiB/s (2383MB/s)(100MiB/44msec) slat (usec): min=41, max=577, avg=323.98, stdev=70.58 clat (nsec): min=732, max=3316.7k, avg=100945.39, stdev=342070.42 lat (usec): min=305, max=3487, avg=424.93, stdev=321.76 clat percentiles (nsec): | 1.00th=[ 732], 5.00th=[ 5664], 10.00th=[ 6112], | 20.00th=[ 7776], 30.00th=[ 20864], 40.00th=[ 63744], | 50.00th=[ 68096], 60.00th=[ 71168], 70.00th=[ 82432], | 80.00th=[ 83456], 90.00th=[ 87552], 95.00th=[ 101888], | 99.00th=[ 921600], 99.50th=[3325952], 99.90th=[3325952], | 99.95th=[3325952], 99.99th=[3325952] lat (nsec) : 750=1.00%, 1000=1.00% lat (usec) : 2=2.00%, 10=21.00%, 20=3.00%, 50=6.00%, 100=59.00% lat (usec) : 250=4.00%, 750=1.00%, 1000=1.00% lat (msec) : 4=1.00% cpu : usr=0.00%, sys=0.00%, ctx=0, majf=0, minf=0 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 rwts: total=0,100,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 trim: (groupid=1, jobs=1): err= 5 (file:io_u.c:1823, func=io_u error, error=Input/output error): pid=1116: Thu Apr 5 17:33:01 2018 cpu : usr=0.00%, sys=0.00%, ctx=0, majf=0, minf=0 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=33.3%, 4=66.7%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,0,1,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 verify: (groupid=2, jobs=1): err= 0: pid=29208: Thu Apr 5 17:33:01 2018 read: IOPS=2272, BW=2273MiB/s (2383MB/s)(100MiB/44msec) slat (usec): min=122, max=632, avg=309.31, stdev=74.76 clat (nsec): min=809, max=160306, avg=62075.90, stdev=26696.35 lat (usec): min=188, max=730, avg=371.39, stdev=80.53 clat percentiles (nsec): | 1.00th=[ 812], 5.00th=[ 7456], 10.00th=[ 12992], 20.00th=[ 39168], | 30.00th=[ 61696], 40.00th=[ 67072], 50.00th=[ 69120], 60.00th=[ 73216], | 70.00th=[ 75264], 80.00th=[ 77312], 90.00th=[ 82432], 95.00th=[ 91648], | 99.00th=[112128], 99.50th=[160768], 99.90th=[160768], 99.95th=[160768], | 99.99th=[160768] lat (nsec) : 1000=0.50% lat (usec) : 2=0.50%, 10=3.50%, 20=1.00%, 50=8.50%, 100=35.00% lat (usec) : 250=1.00% cpu : usr=0.00%, sys=0.00%, ctx=0, majf=0, minf=0 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 rwts: total=100,100,0,0 short=0,0,0,0 dropped=0,0,0,0 Run status group 0 (all jobs): WRITE: bw=2273MiB/s (2383MB/s), 2273MiB/s-2273MiB/s (2383MB/s-2383MB/s), io=100MiB (105MB), run=44-44msec Run status group 1 (all jobs): Run status group 2 (all jobs): READ: bw=2273MiB/s (2383MB/s), 2273MiB/s-2273MiB/s (2383MB/s-2383MB/s), io=100MiB (105MB), run=44-44msec