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2-2 RAID Levels
Copyright © 2004 by LSI Logic Corporation. All rights reserved.
Figure 2.1 RAID 0 Array
2.2 RAID 1
RAID 1 (Figure 2.2) duplicates all data from one drive to a second drive. RAID
1 provides complete data redundancy, but at the cost of doubling the required
data storage capacity.
Figure 2.2 RAID 1 Array
Segment 1
Segment 3
Segment 5
Segment 2
Segment 4
Segment 6
Segment 7 Segment 8
Uses Databases or any other mission critical environment that requires
fault tolerance.
Strong Points Provides complete data redundancy. RAID 1 is ideal for any
application that requires fault tolerance.
Weak Points Requires twice as many hard drives. Performance is impaired during
drive rebuilds.
Drives Two
Segment 1
Segment 2
Segment 3
Segment 1 Duplicated
Segment 2 Duplicated
Segment 3 Duplicated
Segment 4 Segment 4 Duplicated