Understanding Raid Levels - HP D5970A - NetServer - LCII Installation And Configuration Manual

Chapter 2
Figure 2-3. Sample Configuration with Three Arrays and

Understanding RAID Levels

During installation, you configure your logical drives by running a disk array
configuration utility. Each of the logical drives you define must have an assigned
RAID level. Each RAID level has different advantages in terms of performance,
redundancy, and capacity. HP NetRAID Series adapters support both non-
spanned array and spanned array configurations.
Non-spanned arrays have logical drives that are contained entirely within
the array. Non-spanned array configurations use RAID levels 0, 1, 3, or 5.
Spanned arrays have logical drives that are spread across multiple arrays.
This permits the physical drives on two, three, or four arrays to function
as one large logical drive. Spanned array configurations use RAID levels
0, 10, 30, and 50.
Three Logical Drives
RAID Overview
15