User Manual

Appendix
A-8
A.7 RAID 10
RAID 10 arrays are formed by striping data across RAID 1 sub-arrays. This
offers better performance than RAID 1 alone but does not have the
speed of a pure RAID 0 array. Storage efficiency and fault tolerance vary
depending on the number and size of sub-arrays compared to the array
as a whole.
RAID 10: High reliability setup combined with high performance
Characteristics
• Storage capacity = (number of disks/ 2) x (capacity of the smallest disk)
• A minimum of four disks are required.
• Same fault tolerance as RAID 1
• I/O rates are high thanks to striping RAID 1 segments
• Can handle multiple simultaneous disk failures
Recommended use
• High performance database servers
A
CONTROLLER
B
C
G
F
D
E
RAID 1
B
D
F
H
B
D
F
H
RAID 1
A
C
E
G
A
C
E
G
=
Figure A-6 RAID 10 disk array