HP LH4r Integrated HP NetRaid Controller Configuration Guide - Page 15

Understanding RAID Levels

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Chapter 2 RAID Overview The nine physical drives are in three arrays (A0, A1, and A2) with one global hot spare. Figure 2-3. Sample Configuration with Three Arrays and Three Logical Drives 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. The integrated HP NetRAID controller supports 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 10, 30, and 50. 9

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Chapter 2
RAID Overview
9
The nine physical drives are in three arrays (A0, A1, and A2)
with one global hot spare.
Figure 2-3. Sample Configuration with Three Arrays and
Three Logical Drives
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. The integrated HP NetRAID controller supports 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
10, 30, and 50.