IO Performance - expert view

[methos]

Running Napp-IT (thanks Gea), I'm curious on the thoughts on the following DD Benchmark?




Memory size: 32767 Megabytes

write 12.8 GB via dd, please wait...
time dd if=/dev/zero of=/ISCSI/dd.tst bs=2048000 count=6250

6250+0 records in
6250+0 records out
12800000000 bytes transferred in 56.746088 secs (225566209 bytes/sec)

real 56.7
user 0.0
sys 33.3

12.8 GB in 56.7s = 225.75 MB/s Write

wait 40 s
read 12.8 GB via dd, please wait...
time dd if=/ISCSI/dd.tst of=/dev/null bs=2048000

6250+0 records in
6250+0 records out
12800000000 bytes transferred in 11.158697 secs (1147087338 bytes/sec)

real 11.2
user 0.0
sys 10.8

12.8 GB in 11.2s = 1142.86 MB/s Read

///////////////////////////////////

pool: ISCSI
state: ONLINE
scan: none requested
config:

NAME STATE READ WRITE CKSUM CAP Product
ISCSI ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c10t50000C0F01299476d0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
c9t50000C0F01BF37FEd0 ONLINE 0 0 0 900.2 GB WD9001HKHG-02VUC
mirror-1 ONLINE 0 0 0
c11t50000C0F01DE3792d0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
c8t50000C0F02CF836Ad0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
mirror-2 ONLINE 0 0 0
c12t50000C0F01DE37AEd0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
c7t50000C0F02795142d0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
mirror-3 ONLINE 0 0 0
c5t50000C0F02792D2Ad0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
c6t50000C0F02795CE6d0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
logs
c1t1d0 ONLINE 0 0 0 120 GB INTEL SSDSC2BB12

errors: No known data errors