HP LH4r Installation and configuration of the HP NetRAID, NetRAID-1 and NetRAI - Page 23

Understanding RAID Levels

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Chapter 2 RAID Overview 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. HP NetRAID Series adapters support both nonspanned 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. 15

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Chapter 2
RAID Overview
15
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. 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.