[root@iZ25oat874uZ data]# time dd if=/dev/zero of=/var/test bs=8k count=1000000 1000000+0 records in 1000000+0 records out 8192000000 bytes (8.2 GB) copied, 114.885 s, 71.3 MB/s
real 1m54.947s user 0m0.185s sys 0m9.719s
