Filter
Top Products
Appendix C RAID
18
(5) RAID10
This method slices data (sent from the host) and distributes (RAID0) the data to pairs of mirrored
disks (RAID1).
Since RAID10 distributes data to multiple disks, it enables concurrent processing and makes
quick access. In addition, it has the same data in dual configuration. Even if one of the disks
fails, the other disk enables access to the data.
Reliability is about 1/n (n: number of paired sets of RAID1 disks) of RAID1 consisting of two
disks. Reliability is lower than that of a single RAID1, but it is still high enough.
<Advantage>
y High reliability
y Quick access
y No performance deterioration when a single disk fails
<Disadvantage>
y Redundant data takes up a half of the disk capacity.
Data Sent from Host
Block2 Block3Block1 Block4 Block5
Block1
Block3
Block5
Block2
Block4
Physical Disk 1
Block1
Block3
Block5
Block2
Block4
2 3 4