# dmraid -s
*** Group superset isw_difcegd
--> Active Subset
name   : isw_difcegd_raid01
size   : 927985664
stride : 128
type   : mirror
status : ok
subsets: 0
devs   : 2
spares : 0

# dmraid -s | tr -d ' ' | awk -F":" 'BEGIN {r=0} /^status/ {if ($2=="ok") {r=1} } END {print r}'
1