LSI MegaRAID SCSI 320-2 RAID Controller Series 518 - Manual (Page 39)

RAID 1 3-3
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
Figure 3.1 RAID 0 Array
3.3 RAID 1
In RAID 1, the MegaRAID SCSI 320-2 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 3.2 shows a RAID 1 array.
Segment 1
Segment 5
Segment 9 Segment 2
Segment 6
Segment 10
Segment 3
Segment 7
Segment 11
Segment 4
Segment 8
Segment 12
MegaRAID Controller
Uses Use RAID 1 for small databases or any other environment
that requires fault tolerance but small capacity.
Strong Points Provides complete data redundancy. RAID 1 is ideal for any
application that requires fault tolerance and minimal capacity.
Weak Points Requires twice as many disk drives. Performance is impaired
during drive rebuilds.
Drives 2