User`s guide

4-16
RAID SYSTEM CONFIGURATION
This section describes how to use the internal hard disk drives as a RAID System using the Internal RAID Controller .
For more information on the optional RAID Controller, refer to the documents provided with the optional RAID
Controller.
RAID
Overview of the RAID System
What is RAID (Redundant Array of Inexpensive Disks)?
RAID is an abbreviation for "Redundant Array of Inexpensive Disks". The RAID technology allows several hard disk
drives (HDD) to be handled collectively.
RAID can configure several HDDs as a single array (disk group) to operate the HDDs effectively. This can bring higher
performance than a single HDD of a large capacity.
The Internal RAID Controller has allows to divide a single disk group into several logical drives. The Internal RAID
Controller recognizes these virtual disks as if they were a single HDD. The Internal RAID Controller can access in
parallel several HDDs configuring a disk group.
Some RAID levels can recover data from the remaining data and parity by using a rebuild feature if an error occurs in a
single HDD. This provides high reliability for the system.