Raid Levels; Disk Group - NEC N8100-1573F User Manual

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.
3.5-inch disk model
RAID level
RAID 0
RAID 1
2.5-inch disk model
RAID level
RAID 0
RAID 1
NOTE:
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 two HDDs are connected to the Onboard
RAID Controller (LSI Embedded MegaRAID), creating one disk group (DG).
Number of required HDDs
Min.
2
2
Number of required HDDs
Min.
2
2
For details of the RAID levels, see "RAID Levels" described
RAID Controller
HDD 1
(80 GB)
Configuring Your Server 4-27
Max.
2
2
Max.
4
4
Disk Group 0: 160 GB
HDD 2
(80 GB)