RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams

[Jesse]

A quick bit of info here...

RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams

RAID stands for Redundant Array of Inexpensive (Independent) Disks.

On most situations you will be using one of the following four levels of RAIDs.

• RAID 0
• RAID 1
• RAID 5
• RAID 10 (also known as RAID 1+0)

This article explains the main difference between these raid levels along with an easy to understand diagram.

In all the diagrams mentioned below:

• A, B, C, D, E and F ? represents blocks
• p1, p2, and p3 ? represents parity

RAID LEVEL 0



Following are the key points to remember for RAID level 0.

• Minimum 2 disks.
• Excellent performance ( as blocks are striped ).
• No redundancy ( no mirror, no parity ).
• Don?t use this for any critical system.

RAID LEVEL 1



Following are the key points to remember for RAID level 1.

• Minimum 2 disks.
• Good performance ( no striping. no parity ).
• Excellent redundancy ( as blocks are mirrored ).

RAID LEVEL 5



Following are the key points to remember for RAID level 5.

• Minimum 3 disks.
• Good performance ( as blocks are striped ).
• Good redundancy ( distributed parity ).
• Best cost effective option providing both performance and redundancy. Use this for DB that is heavily read oriented. Write operations will be slow.

RAID LEVEL 10



Following are the key points to remember for RAID level 10.

• Minimum 4 disks.
• This is also called as ?stripe of mirrors?
• Excellent redundancy ( as blocks are mirrored )
• Excellent performance ( as blocks are striped )
• If you can afford the dollar, this is the BEST option for any mission critical applications (especially databases).

Jesse Reviewed by Jesse on 14th Feb 2012. RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams A quick bit of info here... RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams RAID stands for Redundant Array of Inexpensive (Independent) Disks. On most situations you will be using one of the following four levels of RAIDs. RAID 0 Rating: 5

[m107]

nice, thank you

[CuraHack]

RAID10 rules them all!

[foxman]

RAID 10 FTW!

[JoomlaZ]

Excellent Post

[torrfriend]

rpm is also raid based...??
that is we can alter the noof disks to match 15k or 7.2k rpm....??

think if i have 2 type of hard disk, 15k and 7.2k is it possible to mingle it..