VessRAID Setup - Promise Technology, Inc.

RAID 10 – Mirror / Stripe
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Chapter 8: Technology Background
Mirror + Stripe combines both of the RAID 1 and RAID 0 logical drive types.
RAID 10 can increase performance by reading and writing data in parallel—
striping—while protecting data by duplicating it—mirroring.
Promise implements RAID 10 by creating a data stripe over one pair of disk
drives, then mirroring the stripe over a second pair of disk drives. Some
applications refer to this method as RAID 0+1.
Figure 6. Promise RAID 10 starts with a data stripe, then mirrors it
1. Data Stripe
Disk Drives
2. Data Mirror
The data capacity RAID 10 logical drive equals the capacity of the smallest
physical drive times the number of physical drives, divided by two.
In some cases, RAID 10 offers double fault tolerance, depending on which
physical drives fail.
RAID 10 arrays require an even number of physical drives and a minimum of
four.
For RAID 10 characteristics using an odd number of physical drives, choose
RAID 1E.