Raid; Overview Of The Raid System; Raid System Configuration - NEC Express 5800 User Manual

RAID System Configuration

This section describes how to use the internal hard disk drives as a RAID System using Internal
RAID Controller (NE3104-001/003).
For more information about the optional RAID Controller, refer to the documents provided with
the optional Products.

RAID

Overview of the RAID System

What is RAID?
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.
Internal RAID Controller has a feature to divide a single disk group into several logical drives
(virtual disks). Operating system recognizes these virtual disks as if it were a single hard disk
drive. Operating system accesses to more than one hard disk drive configuring a disk group in
parallel.
Some RAID levels can recover data from remaining data and parity by using rebuild feature if an
error occurs in a single HDD. This can provide high reliability for the system.
IMPORTANT:
This is the guide to use of the NE3104-001/003 RAID controller.
For an explanation about NE3104-004 RAID controller, refer to the
User's Guide provided with NE3104-004 RAID controller.
NOTE:
When A1080a-E model, two RAID Controllers are configurable.
The RAID Controller connected to the lower(younger) number of
the PCI slot is called as RAID Controller 1.
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