User`s guide

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 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 6
RAID 1 2 2
RAID 5 3 6
RAID 6 3 6
IMPORTANT: To use RAID 5 or RAID 6, with Internal RAID Controller , you need to
additionally install the optional 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 , creating one disk group (DG).
HDD 1
(36 GB)
HDD 2
(36 GB)
HDD 3
(36 GB)
RAID Controller
Disk Group 0: 108 GB