Chapter 3 Functional Description; Raid Management - Asus PCI-DA2100 User Manual

Chapter 3
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-DA2100/-DA2200 RAID controller provides
complete RAID
management.
3.1

RAID Management

RAID stands for Redundant Array of Independent Drives.
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)
RAID 3 Striping with Parity
on dedicated disk
RAID 5 Striping with
interspersed parity
ASUS PCI-DA2100/PCI-DA2200 User's Manual
Functional Description
functionality
Minimum
Drives
1
N
N+1
N+1
N+1
and enhanced
Data Performance
Availability Sequential
Drive
==NRAID R: Highest
W: Highest
>>NRAID R: High
==RAID 5 W: Medium
>>NRAID R: High
==RAID 5 W: Medium
>>NRAID R: High
==RAID 5 W: Medium
3
drive failure
The
Performance
Random
Drive
R: High
W: Highest
R: Medium
W: Low
R: Medium
W: Low
R: High
W: Low
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