Buy the ARP T-Shirt! BIOS Optimization Guide Money Savers!
 21 July 2008
 Discuss here !
The Tech ARP 2015 Mega Giveaway #7 : LEAGOO Elite 4 Smartphone
This year, we are not only rewarding everyone who participates in the Tech ARP forums... Read here
BIOS Option Of The Week - HDD S.M.A.R.T. Capability
Since 1999, we have been developing the BIOS Optimization Guide, affectionately known... Read here
Buy The BOG Book Subscribe To The BOG! Latest Money Savers!
The RAID Guide
Digg! Reddit!Add to Reddit | Bookmark this article:

The RAID Guide

RAID, short for Redundant Array of (Inexpensive or Independent) Disks, is an important component for servers. RAID allows for crash-proof hard drive systems. How does it work? What is the difference between the many RAID levels? We will explain everything in this article!



RAID is a computer concept that has been around for over twenty years.  The computer science department at UC Berkeley developed the RAID concept back in the 1980s. They used the word Inexpensive in view of the speed boost provided by this system, rather than the word Independent which is preferred these days.

Since then, changes in technologies and use of computers have made RAID more popular in mainstream applications. Computers and hard disk drives become faster, smaller, and less expensive. Computers have become a critical part of business. More and more data is stored in these computers and these information must be available 24 hours per day and 7 days a week. Data accessibility and reliability has become a key factor of success in any business.

Accessibility is the biggest advantage of RAID. RAID technology makes data more accessible by preventing slowdowns or problems due to a hardware failure. RAID systems can sustain several bad sectors and even disk failures; and continue running, while being transparent to the user. But all that accessibility comes with a price.

How much? It depends on your total storage requirements, the type of redundancy, and how quick you need to recover from a failure. The cost of this hardware should be measured against the cost of having a failure, and the cost of any slowdown or inaccessibility due to this failure. Some companies can sustain the loss of a disk drive or two and not suffer financially. Other companies, such as brokerages, measure downtime in minutes of revenue loss. For this class of customer, RAID with full redundancy is a must.

Of course, RAID systems not only increase reliability, they can also increase available storage capacity although this is not necessarily true for all RAID levels. Certainly, it is not the main objective of adopting RAID.

What RAID can do

• Reduce the risk of data loss when a hard drive fails
• Improve performance of the storage subsystem

What RAID cannot do

• Fix human mistakes (e.g. accidental deletion of data)
• Protect data from corruption by hardware or software
• Protect data from fire, power surges or any natural disasters


Microsoft Celebrates The Launch Of Windows 10 In Malaysia
NVIDIA GeForce GTX 560 Technology Report Rev. 1.1
OCZ Vertex 2 (E) 120 GB Solid State Drive Review Rev. 3.0
Intel Core i7-975 Extreme Edition Processor Review
NVIDIA GeForce 9600 GSO to NVIDIA GeForce 8800 GTS 512MB Mod Guide
Sapphire Radeon X1950 GT Graphics Card Review
Kingston 15-In-1 Hi-Speed Reader Pictorial Review
Mushkin 2GB HP3200 Dual Channel Memory Kit Review
Corsair 512MB Low Latency PC3200 TwinX Memory Modules Review
Everglide Ricochet ProSurface 2.52 Mouse Pad Review


Copyright © Tech All rights reserved.