Submitted By:
Mr. Arun yadav

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R.A.I.D
RAID is the term used to describe a storage systems.
RAID is a technology that provides increased storage functions and reliability through redundancy.
RAID stands for: Redundant Array of Inexpensive or Independent Disks.
Why RAID?
Increased performance
Increased capacity
fault tolerance, Redundancy
RAID Techniques/Methods
Mirroring
Parity
Cont…
Striping
Mirroring Technique Advantages
The easiest way to get high availability of data's .
Higher read performance.
Striping Technique Advantages
Higher performance
Distributed across disks
Work in parallel
Parity Technique Advantages
Improve the availability
Less waste of space
RAID LEVELS
There are Five basic RAID levels, The other levels are the combination of these five levels.
RAID LEVEL 0.
RAID LEVEL 1.
RAID LEVEL 2.
RAID LEVEL 3.
RAID LEVEL 4.
RAID LEVEL 5.
RAID 0
Striping Technique
Lower availability of data’s.
No Fault tolerance
RAID 1
Mirroring Technique
High availability
RAID 2, 3, 4
Parity Technique
Disk striping
High performance
High availability
RAID 5
Parity with striping
Higher performance than level 1-4
High availability of data.
Most used RAID level
Combinations of RAID levels
Combine any two levels and get the advantages from both levels.
Examples: 0+1, 1+0, 0+3, 3+0, 0+5, 5+0, 1+5, and 5+1.