Thecus N4100 IP Storage Appliance
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Appendix C: RAID Basics
This appendix discusses basic information about RAID and settings.
RAID Introduction
A Redundant Array of Independent Disks (RAID) is an array of several hard disks that provide data security
and high performance. A RAID system accesses several hard disks simultaneously, which improves I/O
performance over a single hard disk. Data security is enhanced by a RAID, since data loss due to a hard
disk failure is minimized by regenerating redundant data from the other RAID hard disks.
Benefits
RAID improves I/O performance, and increases data security through fault tolerance and redundant data
storage.
Improved Performance
RAID provides access to several hard disk drives simultaneously, which greatly increases I/O performance.
Data Security
Hard disk drive failure unfortunately is a common occurrence. A RAID helps prevent against the loss of data
due to hard disk failure. A RAID offers additional hard disk drives that can avert data loss from a hard disk
drive failure. If a hard drive fails, the RAID volume can regenerate data from the data and parity stored on its
other hard disk drives.
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