4-24 Configuring Your Server
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 Internal RAID
Controller (equivalent to N8103-116) supports RAID levels 0, 1, 5, and 6. 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
8
RAID 1
2
2
RAID 5
3
8
RAID 6
3
8
IMPORTANT:
To use RAID 5 or RAID 6, with Internal RAID
Controller (equivalent to N8103-116), you need to additionally install
the optional N8103-119 RAID Upgrade Kit.
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) or Internal RAID Controller (equivalent to N8103-
116), creating one disk group (DG).
HDD 1
(36 GB)
HDD 2
(36 GB)
HDD 3
(36 GB)
RAID Controller
Disk Group 0: 108 GB