1  mkarray  -level
2.1 
2.1 
2.1 
2.1 
2.1   -drive ?  -strip
2.1 
2.1 ?  -sparegoal
2.1 ?  -name ?  -slowwritepriority 
2.2.1 latency
2.2.1 redundancy?  -encrypt
2.1 
2.1 
1 
1