Raid 0+1 (Stripe/Mirror) - Promise Technology FAST TRAK SX4030 User Manual

RAID 0+1 (Stripe/Mirror)

A combination of RAID 0 and RAID 1 arrays. It can increase performance by
reading and writing data in parallel while protecting data with duplication. A
minimum of four drives are required.
With a four-drive disk array, two pairs of drives are striped. Each pair mirrors the
data on the other pair of striped drives. The data capacity is similar to a standard
Mirroring array with half of total capacity dedicated for redundancy.
Figure 3. RAID 0+1 starts with a two-drive Striped array copies it onto two
additional drives to make a Mirror
Data Stripe
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Disk Drives
Chapter 5: Disk Array Concepts
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Data
Mirror