[root@usa-node02 ~]# zpool create -f myzfs mirror /dev/sda5 /dev/sdb5 cache /dev/sda4 /dev/sdb4
[root@usa-node02 ~]# zpool status
pool: myzfs
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
myzfs ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sda5 ONLINE 0 0 0
sdb5 ONLINE 0 0 0
cache
sda4 ONLINE 0 0 0
sdb4 ONLINE 0 0 0
errors: No known data errors
[root@usa-node02 ~]# cd /myzfs
[root@usa-node02 myzfs]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1,1 GB) copied, 6,40916 s, 168 MB/s
[root@usa-node02 myzfs]# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1,1 GB) copied, 7,87374 s, 136 MB/s