Asus PCI-DA2200 - Manual (Page 11)

3-1 ASUS PCI-DA2200 User’s Manual
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 ASUS PCI-DA2200 RAID controller provides complete
RAID functionality and enhanced drive failure management.
3.1 RAID Management
RAID stands for Redundant Array of Independent Drives. The
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
Level
Description Minimum
Drives
Data
Availability
Performance
Sequential
Performance
Random
NRAID Non-RAID 1 Drive Drive
RAID 0 Disk Striping N ==NRAID R: Highest
W: Highest
R: High
W: Highest
RAID 1
(0+1) Mirroring Plus
Striping (if N>1) N+1 >>NRAID
==RAID 5
R: High
W: Medium
R: Medium
W: Low
RAID 3 Striping with Parity
on dedicated disk N+1 >>NRAID
==RAID 5
R: High
W: Medium
R: Medium
W: Low
RAID 5 Striping with
interspersed parity N+1 >>NRAID
==RAID 5
R: High
W: Medium
R: High
W: Low