Promise Technology FastTrak TX4000 - Manual (Page 55)

Chapter 5: Disk Array Concepts
51
Striping / Mirror (RAID 0+1)
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.
2
4
6
8
1
3
5
7
2
4
6
8
1
3
5
7
Disk Drives
Data
Mirror
Data Stripe