NEC SigmaBlade AD106a Uživatelská příručka stáhnout pdf (Strana 47)

Configuring Your Storage and I/O Blade 4-3

RAID Levels

The record mode enabling the RAID feature includes several levels. Among the levels, 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

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 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

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 161 162

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NEC SigmaBlade AD106a Uživatelská příručka Strana 47