RAID

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Basics understanding of RAID

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Slide 1: 

R EDUDANT A RRAY I NDEPENDENT D ISK

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It is a configuration based on concept which is used to increase the volume size, performance and redundancy of the hard disk drive ( Redundancy is nothing but your fault tolerance). RAID

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Two types of RAID Hardware RAID Software RAID RAID

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The configuration and controlling of the HARD disk using RAID Controller is known as Hardware raid. Hardware RAID

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The configuration and controlling of the HARD disk using the software utility available in the operating system is known as software raid. Software RAID

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RAID 0 - (Simple , Spanned, Stripped ). RAID 1 – Mirroring. RAID 2 – Not used. RAID 3 – Not used. RAID 4 – Not used. RAID 5 – Stripping with Parity. RAID Levels

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SIMPLE VOLUME The simple partition done on DYNAMIC disk is known as simple volume RAID - 0

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SPANNED VOLUME The volume size can be increased (Expanded) by adding an another physical hard disk without any data loss in the existing volume. RAID - 0

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STRIPPED VOLUME The datas stored on the volume will be stripped and stored on both the hard disks alternatively and symultaneously. Due to this the read write performance will be excellent. RAID - 0

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RAID - 5 STRIPPING WITH PARITY The datas stored on the volume will be stripped and stored on all the hard disks alternatively and simultaneously, Along with the datas a copy of parity information of the datas will also be stored on all the disks, which provides the data Redundancy.

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MIRRORED VOLUME The datas stored on the volume will be stored on both the hard disks simultaneously. This is to provide 100% data Redundancy. C RAID - 1