Promise Technology FASTTRAK SX4300 - Manual (Page 45)

Chapter 5: Concepts
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RAID 10 – Mirror / Stripe
Mirror/Stripe combines both of the RAID 0 and RAID 1 logical drive types. It can
increase performance by reading and writing data in parallel while protecting data
with duplication. At least four disk drives are needed for RAID 10 to be installed.
With a four-disk-drive logical drive, one drive pair is mirrored together then
striped over a second drive pair.
Figure 4. RAID 10 takes a data mirror on one drive pair and stripes it over
two drive pairs
The data capacity is similar to a RAID 1 logical drive, with half of the total storage
capacity dedicated for redundancy. An added plus for using RAID 10 is that, in
many situations, such a logical drive offers double fault tolerance. Double fault
tolerance may allow your logical drive to continue to operate depending on which
two disk drives fail.
RAID 10 logical drives on the FastTrak SX Series consist of 4 disk drives.
Data Stripe
Data
Mirror
Disk Drives