Abit Hot Rod 100 Pro, Руководство пользователя

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A-6 Appendix A
Hot Rod 100 Pro
Which RAID Level Should I Use?
Many different disk array configurations are possible, depending on end-user requirements
and the goals of the manufacture. Each controller design has a different functionality to
accomplish specific performance and data availability goals. Therefore, no individual RAID
level is inherently superior to any other. Each of the five array architectures is well suited for
certain types of applications and computing environments. The follow table summarizes the
strengths and weaknesses of each RAID level.
RAID
Level
Min.
No. of
Drive
s
Description
Characteristics /
Strengths
Weaknesses
RAID 0 2
!
Striped Disk
Array without
Fault Tolerance
!
Highest I/O Performance
!
Very simple design
!
Easy to implement
!
No redundancy
One drive fails,
all data is lost
RAID 1 2
!
Mirroring and
Duplexing
!
100% redundancy of
data
!
Twice the Read
transaction rate of a
single disk, same Write
transaction rate as single
a disk
!
Simplest RAID storage
subsystem design
!
High
redundancy cost
overhead
RAID
0+1
4
!
Performance and
Security
!
The combination of
Striping and Mirroring
!
Offers the speed
advantages of RAID
level 0 combined with
the data reliability
advantages of RAID
level 1
!
Need twice the
data capacity
RAID 2
Not
used
in
LAN
!
Disk Striping with
error-correction
code (ECC)
!
Previously used for
RAM error
environments correction
(known as Hamming
Code) and in disk drives
before the use of
embedded error
correction
!
No practical use