WD ARRAY MANAGEMENT SETUP
APPENDIX A: RAID CONCEPTS - 56
USER MANUAL
Appendix A: RAID Concepts
RAID
RAID is an acronym that stands for Redundant Array of Independent Disks. It is divided into
different numbered Levels. The numbers of these Levels do not mean that one Level is higher
or better than another. Each Level has its own advantages and shortcomings.
AMS allows you to select the RAID Level when you create an Array. The available RAID
Level selection depends on which WD product you have and the number of disk drives
available.
The table below lists the RAID Levels obtainable with the WD SATA RAID Controller.
Table 4. RAID Levels available on the WD SATA RAID Controller
Following is a discussion how these RAID Levels work.
RAID 0
RAID 0 is a method of striping or writing data over two or more hard disks at the same time.
Multiple disks can read and write data faster than one. However, there is no data redundancy
with this arrangement, so if one disk fails, all your data is lost..
RAID Level
Name
Minimum drives
Maximum drives
0
Striping
1
4
1
Mirroring
2
2
1
3
5
7
2
4
6
8
Disk Drives
Data
Stripe
Содержание Array Management Setup
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