User`s guide

Appendix B: Selecting the Best RAID Level ● 155

Non-redundant Logical Drives (RAID 0)

A logical drive with RAID 0 includes two or more disk drives and provides data striping, where

data is distributed evenly across the disk drives in equal-sized sections. However, RAID 0

arrays do not maintain redundant data, so they offer no data protection.

Compared to an equal-sized group of independent disks, a RAID 0 array provides improved I/O

perfor

mance.

Drive segment size is limited to the size of the smallest disk drive in the logical drive. For

instance, a logical drive with two 250 GB disk drives and two 400 GB disk drives can create a

RAID 0 drive segment of 250 GB, for a total of 1000 GB for the volume, as shown in this figure.

Disk Drive 1

Disk Drive 2

Disk Drive 3

Disk Drive 4

250 GB

400 GB

Drive Segment Size (Smallest Disk Drive)

Disk Drive 2

Disk Drive 3

Disk Drive 4

Disk Drive 1

15...997

26...998

3 7 ... 999

4 8 ... 1000

Unused Space = 150 GB

Disk Drives in Logical Drive RAID 0 Logical Drive = 1000 GB

Unused Space = 150 GB