NEC N8100-14522F, User Manual

Page: 97 / 320

Configuring Your Server 4-29
RAID Levels
The record mode enabling the RAID feature includes several levels. Among the levels, the Onboard
RAID Controller (LSI Embedded MegaRAID) supports RAID levels 0 and 1. The number of hard
disk drives required to create a disk group varies depending on the RAID level as shown in the table
below.
Number of required HDDs
RAID level
Min. Max.
RAID 0 1 3
RAID 1 2 2
NOTE:
For details of the RAID levels, see "RAID Levels" described
later in this chapter.
Disk Group
A disk group is configured with more than one HDDs.
The allowable number of disk groups is equal to the number of HDDs.
The figure below shows a sample configuration. The three HDDs are connected to the Onboard
RAID Controller (LSI Embedded MegaRAID), creating one disk group (DG).
HDD 1
(36 GB)
HDD 2
(36 GB)
HDD 3
(36 GB)
RAID Controller
Disk Group 0: 108 GB