2 # create a raid1 array with a wrmostly device
4 mdadm -CR $md0 -l1 -n3 $dev0 $dev1 --write-mostly $dev2
5 testdev $md0 1 $mdsize1a 64
7 # unfortunately, we cannot measure if any read requests are going to $dev2
11 mdadm -CR $md0 -l1 -n3 --write-behind --bitmap=internal --bitmap-chunk=4 $dev0 $dev1 --write-mostly $dev2
12 testdev $md0 1 $mdsize1a 64