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Chapter 3 Functional Description
The advantages of RAID are: Availability, Capacity and Performance.
Choosing the right RAID level and drive failure management can
increase Availability, subsequently increasing Performance and
Capacity. The AA-3102RS RAID controller provides complete RAID
functionality and enhanced drive failure management.
RAID Management
RAID stands for Redundant Array of Inexpensive Drive.
advantages of using a RAID storage subsystem are:
Provides disk spanning by weaving all connected drives into one
single volume.
Increases disk access speed by breaking data into several blocks
when reading/writing to several drives in parallel. With RAID,
storage speed increases as more drives are added.
Provides fault-tolerance by mirroring or parity operation.
What are the RAID levels?
RAID
Description
Level
NRAID
Non-RAID
RAID 0
Disk Striping
RAID 1
Mirroring Plus
(0+1)
Striping
(if N>1)
Chapter 3 Functional Descriptions
Minimum
Data
Performance
Drives
Availability
Sequential
1
Drive
N
==RAID
R: Highest
W: Highest
N+1
>>NRAID
R: High
==RAID 5
W: Medium
The
Performance
Random
Drive
R: High
W: Highest
R: Medium
W: Low
7
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