raid1:
root@jyka:/workha# time sh -c "dd if=/dev/zero of=ddfile bs=8k count=200000 && sync"
200000+0 records in
200000+0 records out
1638400000 bytes (1,6 GB) copied, 11,3008 s, 145 MB/s

real    0m15.622s
user    0m0.100s
sys     0m2.730s


raid0:
root@jyka:/workla# time sh -c "dd if=/dev/zero of=ddfile bs=8k count=200000 && sync"
200000+0 records in
200000+0 records out
1638400000 bytes (1,6 GB) copied, 7,74374 s, 212 MB/s

real    0m9.696s
user    0m0.030s
sys     0m2.490s