raid

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By: farha05 (42 month(s) ago)

hey plz send me raid ppt including powerpoint ppt also.......plzzzz snd me as soon as possible...

Presentation Transcript

RAID : 

RAID Redundant Array of Inexpensive Disks

History : 

History Single Large Expensive Disk (SLED) IBM and Berkeley University RAID levels 0-5

Why RAID? : 

Why RAID? Redundancy, fault tolerance Increased capacity Increased performance

Mirroring : 

Mirroring The easiest way to get high availability Half the size Higher read performance

Striping : 

Striping Higher performance Distributed across disks Work in parallel

Parity : 

Parity Improve the availability Less waste of space

RAID 0 : 

RAID 0 Striping Highest performance Lower availability

RAID 1 : 

RAID 1 Mirroring High availability Low computing power

RAID 2, 3, 4 : 

RAID 2, 3, 4 Parity High performance High availability

RAID 5 : 

RAID 5 Parity with distribution Higher performance than level 1-4 High availability Most used RAID level

Combinations of different levels : 

Combinations of different levels Combine two levels and get the advantages from both Either hardware driven, software driven or a combination of both Examples: 0+1, 1+0, 0+3, 3+0, 0+5, 5+0, 1+5, and 5+1.

Alternatives to RAID : 

Alternatives to RAID Single Large Expensive Disk (SLED) Redundant Array of Distributed Disks (RADD) More alternatives: 2D-RADD, C-RAID, RO WB-optimistic and RO WB-pessimistic

The End : 

The End First RAID system. Second RAID system.

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