RAID 10 2-3
Copyright © 2004 by LSI Logic Corporation. All rights reserved.
2.3 RAID 10
RAID 10 is a combination of RAID 1 and RAID 0. RAID 10 has mirrored
drives. It breaks up data into smaller blocks, then stripes the blocks of data to
each RAID 1 RAID set. Each RAID 1 RAID set then duplicates its data to its
other drive. The size of each block is determined by the stripe size parameter,
which is set during the creation of the RAID set. RAID 10 can sustain one drive
failure in each array while maintaining data integrity.
Figure 2.3 shows a RAID 10 array with four disk drives.
Figure2.3 RAID 10 Array
Uses Works best for data storage that must have 100% redundancy of
RAID 1 (mirrored arrays) and that also needs the enhanced I/O
performance of RAID 0 (striped arrays). RAID 10 works well for
medium-sized databases or any environment that requires a higher
degree of fault tolerance and moderate to medium capacity.
Strong Po i nt s Provides both high data transfer rates and complete data
redundancy.
Weak Po i n ts Requires twice as many drives..
Drives 4
RAID 1
Disk 2Disk 1 Disk 4Disk 3
RAID 1
RAID 0
Segment 1
Segment 3
Segment 5
Segment 1
Segment 3
Segment 5
Segment 2
Segment 4
Segment 6
Segment 2
Segment 4
Segment 6
Segment 2
Segment 4
Segment 6