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IDE Training Course, Part 2:<BR>Performance and Data Security with RAID
Краткое содержание статьи: Once upon a time, IDE drives were simple data storage devices, but now you can connect several hard drives thanks to inexpensive RAID controllers. RAID mode 0 evenly distributes the data to all available drives, ideally multiplying transmission capacity. RAID 1, on the other hand, uses additional hard drives as additional data storage devices in order to maximize data security.

IDE Training Course, Part 2:<BR>Performance and Data Security with RAID


Редакция THG,  13 августа 2002
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Introduction

Introduction

The cry for more performance is as old as the computer itself. Especially when speedy action is called for, the hard drive has more influence than many users realize. Windows offers ways to optimize performance, but there are limits to the physical potential of any hard drive. Using several hard drives simultaneously helps to alleviate this problem.

The technology required for this is known as RAID (Redundant Array of Independent Disk Drives). To put it simply, several hard drives are used jointly so that their data transfer rates can be bundled and data security increased. Depending on the number of drives present, you can choose different modes to fulfill the following purposes: increase data security in case a drive crashes, increase performance, or both. For a functioning drive array, you'll need the right RAID controller that will support the selected mode, in addition to the hard drives. These can be housed in nearly any PC in a free PCI slot, or they may come integrated on the motherboard.

Two things need to be considered in selecting the right hard drives: drive capacity and rotational speed. Today's interfaces correspond exclusively to UltraATA/100 or even UltraATA/133, so they are always fast enough. High rotational speeds allow maximum data transfer rates and minimal access times, but they are accompanied by an increase in both heat and operating noise. RAID can principally be used with any hard drive; this article will focus on the finer points of this technology and discuss all of the important details.
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