Raid Level - NEC Express 5800 User Manual

Hardware

RAID Level

This section describes particulery the characteristics of the RAID levels suppurted by Internal
RAID Controller .
Characteristics of RAID Levels
The table below lists the characteristics of the RAID levels.
Level
Striping
RAID0
RAID1 Mirroring
RAID5 Striping of both data
and redundsant data
Striping of both data
RAID6
and redundsant data
Spanning of RAID1
RAID10
RAID50 Spanning of RAID5
Function Redundancy
No
Yes
Yes
Yes
Yes
Yes
Characteristics
· Data read/write at the highest rate
· Largest capacity
· Capacity: (capacity of single HDD) ×
(number of HDDs)
· Two HDDs required
· Capacity: capacity of single HDD
· Three HDDs required
· Capacity: (capacity of single HDD) ×
((number of HDDs)-1)
· Three or more HDDs required
· Capacity: (capacity of single HDD) ×
((number of HDDs) / 2)
· Four or more HDDs required
· Capacity: (capacity of single HDD) ×
((number of HDDs) / 2)
· Six HDDs required
· Capacity: (capacity of single HDD) ×
((number of HDDs) - 2)
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