RAID Technology Overview - September 2007

List of Figures

1-1 Physical Disks Added to System ..................................................................................................13

1-2 Physical Disks Configured into a Logical Drive (L1) ...................................................................13

1-3 Data Striping (S1-S4) of Data Blocks B1-B12 ................................................................................14

2-1 Data Striping (S1-S4) of Data Blocks B1-B12 ................................................................................15

2-2 Disk Drive Mirroring of P1 onto P2 (RAID 1)...............................................................................16

2-3 Mirroring and Striping (RAID 1+0)...............................................................................................16

2-4 Distributed Data Guarding, Showing Parity Information (Px,y) .................................................17

2-5 Advanced Data Guarding, Showing Parity Information (Px,y and Qx,y)....................................18

A-1 Relative Probability of Logical Drive Failure................................................................................22