Raid Overview; Physical Drive; Arrays - HP D5970A - NetServer - LCII Installation And Configuration Manual

2 RAID Overview

This chapter summarizes concepts and terminology used to describe RAID
systems. It describes the different RAID levels available with the HP NetRAID
Series adapters. For definitions of terms not introduced here, see the Glossary.
RAID Overview
HP NetRAID Series adapters let you link multiple hard disk drives together and
write data across them as if they were one large drive. With the HP NetRAID
Series adapter, you can configure your linked drives into a RAID (Redundant
Array of Independent Disks) subsystem.

Physical Drive

The term "physical drive" refers to a single hard disk module.

Arrays

HP NetRAID Series adapters can combine up to eight physical drives into one
array. It is recommended that all drives in an array have the same capacity. If you
use drives with different capacities in an array, all the drives in the array are
treated as though they have the capacity of the smallest drive.
Figure 2-1. Physical Drive
Figure 2-2. Array of Physical Drives
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