want to know what RAID is ?

Hi ,
i need a very good explanation what raid is ?
how it comes in the hardware way and in the software way ?
and an explanation about the raid types will be appriciated too

Thanks

Victor
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victorbxAsked:
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sunray_2003Commented:
Victor,

Check this

http://www.webopedia.com/TERM/R/RAID.html


Scroll down to see RAID levels

Do you want more ?

Sunray
victorbxAuthor Commented:
what are the diffrences between the software version and the hardware version if there is any ?

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Kyle SchroederEndpoint EngineerCommented:
Software RAID is controlled by the operating system and device drivers to perform the RAID function (i.e. writing duplicate information to both disks of a RAID-1 array).  The OS knows it is working with RAID.  Using hardware-based RAID, the OS doesn't know that there is a RAID card sitting there that is doing the real work of striping/mirroring/etc, it looks at the array as a single drive and lets the hardware (RAID card, etc) deal with the details.

-dog*

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sunray_2003Commented:
Do you want more info ?

Sunray
sunray_2003Commented:
Thanks


Sunray
aprovencCommented:
Is RAID only a fault tolerant for data or can it also protect operating system and Weblogic?
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