Tuesday, September 21, 2010

What is Raid0 & Raid5 ?


What is Raid0 & Raid5 ?

RAID -- Redundant Array of Inexpensive/Independent Disks



RAID is a method to attain hight performance and redundancy out of HDDs.

It is implement in multiple ways and depending upon performance and redundancy even there are miscellaneous levels of RAID. Most adjectives being RAID-0 and RAID-5.



RAID-0 -- Suppose you enjoy two HDDs and you need greater working in reading and writing notes, however redundancy of the data is not that far-reaching, like a cache server. With RAID-0 you ca complete this. Data is striped and written on two both the HDDs. For example... data is "MY FILE", afterwards it will be broken in pieces and written something approaching this:



HDD-1 -- M,F,L

HDD-2 -- Y,I,E



This increases the performance of read and write operation. However, if one of the HDDs fails complete notes is lost. You need at smallest two HDDs to implement this RAID.



RAID-5 -- Most popular RAID and widely implemented contained by most of the servers. You require at least 3HDDs to implement this RAID plane. it is also called distributed stripe set beside parity.

The benefit of this effecting is even if one of the HDDs fail you can recuperate data from rest of the HDDs. It does this by calculating the egalitarianism of the striped data using XOR(exclusive OR) operation.

You can check below URL to return with a pictorial representation:



http://www.acnc.com/04_01_05.html...

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