Raid Levels explained

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RAID 5

Provides redundancy by writing data and parity information across three or more drives, thus increasing performance. The RAID Level 5 provides the best combination of disk array technology. The most popular RAID level supplied.


Advantages

  • Most flexible of all disk arrays
  • Best balance cost / performance / protection of any RAID system
  • Allows multiple simultaneous writes
  • High read data rate
  • Medium write data rate
  • 3 drives minimum
  • Ideal for small write applications
  • Highly efficient

Disadvantages

  • Inefficient with large file transfer
  • Disk failure has an impact on performance

Applications

  • Transaction processing
  • Relational Databases
  • File & Print Servers
  • WWW, E-mail, and News servers
  • Intranet Servers