Raid 1+0

|| \ / ||
|| / \ ||


Scenario 1

Mirror Member 1 , Cylinder 1  Fails ..    

Mirror Member 1 , Cylinder 2  Fails ..      

Status  OK


Scenario 2

Mirror Member 2 , Cylinder 1  Fails ..    

Mirror Member 2 , Cylinder 2  Fails ..      

Status  OK 


Scenario 3

Mirror Member 1 , Cylinder 1  Fails ..    

Mirror Member 2 , Cylinder 2  Fails ..      

Status  OK


Scenario 4

Mirror Member 1 , Cylinder 1  Fails ..    

Mirror Member 2 , Cylinder 1  Fails ..      

Status  BAD 


Scenario 5

Mirror Member 1 , Cylinder 2  Fails ..    

Mirror Member 2 , Cylinder 2  Fails ..      

Status  BAD 




Raid 0+1

|x| || |x|
|x| || |x|


Scenario 1

Stripe Member 1 , Cylinder 1  Fails ..    

Stripe Member 1 , Cylinder 2  Fails ..      

Status  BAD


Scenario 2

Stripe Member 2 , Cylinder 1  Fails ..    

Stripe Member 2 , Cylinder 2  Fails ..      

Status  BAD 


Scenario 3

Stripe Member 1 , Cylinder 1  Fails ..    

Stripe Member 2 , Cylinder 2  Fails ..      

Status  BAD ... (may recover by swapping the drives)


Scenario 4

Stripe Member 1 , Cylinder 1  Fails ..    

Stripe Member 2 , Cylinder 1  Fails ..      

Status  OK 


Scenario 5

Stripe Member 1 , Cylinder 2  Fails ..    

Stripe Member 2 , Cylinder 2  Fails ..      

Status  OK




Score:    RAID 1+0  =  3

	  RAID 0+1  =  2.5


Raid  1+0  win's by a few coat's of Paint   ;-)