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, 1, and 10. 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 4
RAID 1 2 2
RAID 10 4 4
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
(80 GB)
HDD 2
(80 GB)
RAID Controller
Disk Group 0: 160 GB
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