User`s guide

Chapter 1. Overview of RAID and RAID Array 200 Subsystems
EK–SWRA2–IG. C01 1–3
Striping offers a high I/O rate when compared to the I/O rate of a single disk.
RAID 0 does not provide redundancy, therefore, if any drive fails all data is lost.
(Other RAID levels provide redundancy by generating array parity information
for reconstructing data if a drive fails, or by mirroring disks).
Figure 1–1 RAID 0
SCSI-2
Disk Array Controller
SCSI SCSI SCSI
Data 2
Data 1
Block 0-1
Block 6-7
Block 12-13
Block 4-5
Block 10-11
Block 16-17
Block 2-3
Block 14-15
Block 8-9
Data 3
In figure 1–1 segments are defined as two blocks of 512 bytes each. Therefore,
blocks 0 and 1 are written to data disk 1, blocks 2 and 3 are written to data disk 2
and so on.