Nexentastor+iSCSI
Fedoraからマウントしてベンチ取ってみた（4k random write)
（Disk statsに複数あるのはmultipathだから）

fio --filename=/store/benchmark/benchfio -rw=randwrite -bs=4k -size=5G -numjobs=4 -runtime=10 -group_reporting -name=file1
file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
...
file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
fio 1.55
Starting 4 processes
file1: Laying out IO file(s) (1 file(s) / 5120MB)
Jobs: 4 (f=4): [wwww] [100.0% done] [0K/419.8M /s] [0 /105K iops] [eta 00m:00s]
file1: (groupid=0, jobs=4): err= 0: pid=10719
write: io=3978.5MB, bw=407349KB/s, iops=101837 , runt= 10001msec
clat (usec): min=4 , max=600085 , avg=36.50, stdev=729.01
lat (usec): min=4 , max=600085 , avg=36.59, stdev=729.01
bw (KB/s) : min= 447, max=230968, per=26.01%, avg=105959.17, stdev=26963.27
cpu : usr=3.02%, sys=43.23%, ctx=884074, majf=0, minf=107
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 r/w/d: total=0/1018475/0, short=0/0/0
lat (usec): 10=8.55%, 20=85.36%, 50=5.84%, 100=0.12%, 250=0.03%
lat (usec): 500=0.01%, 750=0.01%, 1000=0.01%
lat (msec): 2=0.01%, 4=0.01%, 10=0.03%, 20=0.03%, 50=0.02%
lat (msec): 100=0.01%, 250=0.01%, 500=0.01%, 750=0.01%