User's Manual

Drive Arrays and Fault Tolerance
D-6 HP Smart Array 641/642 Controller User Guide
HP CONFIDENTIAL
Writer: John Turner File Name: l-appd drive arrays & fault tolerance
Codename: darkmatter -antimatter Part Number: 309311-001 Last Saved On: 11/6/02 4:34 PM
RAID 1+0—Drive Mirroring
In this configuration, data is duplicated to a second drive.
P1 P2
B1
B2
B3
B4
B1
B2
B3
B4
Figure D-5: Drive mirroring of P1 to P2
When the array has more than two physical drives, drives are mirrored in pairs.
S1
S2
S1
S2
P1
P5
B5
B1
B1
B5
P2
P6
B6
B2
B2
B6
P3
P7
B7
B3
B3
B7
P4
P8
B8
B4
B4
B8
Figure D-6: Mirroring with more than two physical
drives in the array