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Chapter 2 RAID
This chapter describes the RAID features which the disk array controller supports.
1. Overview of RAID
1-1. What is RAID (Redundant Array of Inexpensive
Disks)?
RAID is an abbreviation for "Redundant Array of Inexpensive Disks." The RAID technology
allows more than one hard disk drive (HDD) to be handled collectively.
In actual, RAID can configure more than one HDD as a single array (logical drive) to
operate the HDDs effectively. This can bring higher performance than a single HDD of a
large capacity.
For the array (logical drive) configuration, the host computer recognizes more than one
HDD as if it were a single HDD. The host computer accesses to more than one HDD
configuring an array (logical drive) in parallel.
Some RAID levels can recover data from remaining data and parity by using rebuild if an
error occurs in an HDD. This can provide high reliability for the system.