Pegasus R6, R4 Product Manual
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RAID 10 – Mirror + Stripe
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 or striping,
and duplicating the data, or 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
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.
1. Data Stripe
2. Data Mirror
Disk Drives
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